v3.25.4
Investment Risks
Oct. 31, 2025
Innovator 20+ Year Treasury Bond 5 Floor ETF - Quarterly | Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] You could lose money by investing in the Fund.
Innovator 20+ Year Treasury Bond 5 Floor ETF - Quarterly | Risk Not Insured Depository Institution [Member]  
Prospectus [Line Items]  
Risk [Text Block] An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency.
Innovator 20+ Year Treasury Bond 5 Floor ETF - Quarterly | Risk Nondiversified Status [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Non-Diversification Risk.    The Fund is classified as a “non-diversified company” under the 1940 Act. As a result, the Fund is only limited as to the percentage of its assets which may be invested in the securities of any one issuer by the diversification requirements imposed by the Internal Revenue Code of 1986, as amended (the “Code”). The Fund may invest a relatively high percentage of its assets in a limited number of issuers. As a result, the Fund may be more susceptible to a single adverse economic or regulatory occurrence affecting one or more of these issuers, experience increased volatility and be highly invested in certain issuers.

Innovator 20+ Year Treasury Bond 5 Floor ETF - Quarterly | Defined Outcome Strategy Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Defined Outcome Strategy Risk.    The Fund, in employing a “defined outcome strategy” is subject to certain unique risks, which are detailed below.

Cap Change Risk.    A new Cap is established at the beginning of each Outcome Period and is dependent on prevailing market conditions at the time the Cap is established. As such, the Cap may rise or fall from one Outcome Period to the next and is unlikely to remain the same for consecutive Outcome Periods. For the current Outcome period, the Fund’s returns are uncapped, however, there is no guarantee that the Fund’s returns will not be subject to a Cap in any subsequent Outcome Period.

Capped Upside Return Risk.    The Fund’s strategy seeks to provide returns that are subject to the Cap. For the current Outcome period, the Fund’s returns are uncapped, however, there is no guarantee that the Fund’s returns will not be subject to a Cap in any subsequent Outcome Period. In the event that the Underlying ETF experiences gains in excess of the Cap for an Outcome Period, the Fund will not participate in, and will underperform the Underlying ETF to the extent of, those gains beyond the Cap. The Fund’s strategy seeks to participate in the upside of the entirety of the Underlying ETF gains (subject to the Cap), if Shares are held at the time at which the Fund enters into the FLEX Options and held until those FLEX Options expire at the end of the Outcome Period. In the event an investor purchases Shares after the FLEX Options were entered into, there may be little or no ability for that investor to experience an investment gain on their Shares. Because the FLEX Options are designed to produce the sought-after returns on the last day of the Outcome Period, if an investor sells Shares prior to the expiration date of the FLEX Options such investor may sell at a point where the Fund’s performance does not match the performance of the Underlying ETF over the Outcome Period, and therefore may sell at a point where the Fund has underperformed the Underlying ETF, even if such gains do not exceed the Cap. The Fund seeks to actively manage its portfolio such that any transaction fees incurred by the Fund in connection with the management of the Fund’s assets will not impact the Fund’s performance in seeking to provide upside exposure to the Underlying ETF or the Fund’s ability to experience returns that match the Cap, to the extent the returns of the Underlying ETF are equal to or greater than the Cap. However, it is not guaranteed that the Fund will be able to successfully manage its assets to contemplate the transaction fees incurred by the Fund to achieve the Outcomes sought by the Fund. An investor that holds Shares through multiple Outcome Periods may fail to experience gains comparable to those of the Underlying ETF over time because at the end of each Outcome Period, a new Cap will be established based on the then-current price of the Underlying ETF and any gains above the prior Cap will be forfeited. To the extent the Fund invests directly in the Underlying ETF, the Cap will be provided after the consideration of dividends or distributions received, whereby the Fund has assumed an anticipated dividend

rate, which is on the historical dividend rate of the Underlying ETF. This assumed dividend rate may be less than dividends actually received by the Fund for the Outcome Period, in which case the Cap will be less than disclosed herein.

Floor Risk.    There can be no guarantee that the Fund will be successful in its strategy to provide a maximum loss of 5% over the duration of the Outcome Period. The Fund does not provide principal protection or non-principal protection, and an investor may experience significant losses on its investment, including the loss of its entire investment. The Fund’s strategy seeks to provide the sought-after protection of the Floor if Shares held at the time at which the Fund enters into the FLEX Options and held until those FLEX Options expire at the end of the Outcome Period. In the event an investor purchases Shares after the FLEX Options were entered into or sells Shares prior to the expiration of the FLEX Options, the Floor that the Fund seeks to provide may not be available. An investor that holds Shares through multiple Outcome Periods will be unable to recapture losses from prior Outcome Periods because at the end of each Outcome Period, a new Floor will be established based on the then-current price of the Underlying ETF and any losses experienced prior to the implementation of the Floor. Moreover, the quarterly imposition of a new Cap on future gains may make it difficult to recoup any losses from the prior Outcome Periods such that, over multiple Outcome Periods, the Fund may have losses that exceed those of the Underlying ETF. To the extent the Fund invests directly in the Underlying ETF, the Floor will be provided after the consideration of dividends or distributions received, whereby the Fund has assumed an anticipated dividend rate, which is on the historical dividend rate of the Underlying ETF. This assumed dividend rate may be less than dividends actually received by the Fund for the Outcome Period, in which case the Floor will be less than the sought-after 5%, and investors could experience losses than exceed 5%.

Investment Objective Risk.    Certain circumstances under which the Fund might not achieve its objective include, but are not limited, to (i) if the Fund disposes of FLEX Options, (ii) if the Fund is unable to maintain the proportional relationship based on the number of FLEX Options in the Fund’s portfolio, (iii) a significant accrual of Fund expenses in connection with effecting the Fund’s principal investment strategy or (iv) adverse tax law changes or interpretations affecting the treatment of FLEX Options. If these factors were to occur, the Fund may be unable to achieve its investment objective, and investors may not receive the Outcomes described herein. Finally, the Fund is also subject to management risk as an actively-managed fund, which may cause it not to achieve its investment objective.

Management Risk.    Defined outcome strategies are actively-managed and accordingly, the Fund is subject to management risk. The Sub-Adviser applies investment techniques and risk analyses in making investment decisions for the Fund, subject to the oversight of the Adviser, but there can be no guarantee that the Sub-Adviser will properly implement the Fund’s investment strategy and therefore the Fund may not achieve its investment objective or its sought-after Outcomes, or perform as well as similarly situated funds.

Outcome Period Risk.    The Fund’s investment strategy is designed to deliver returns that match those of the Underlying ETF if Shares are held from the time the Fund enters into the FLEX Options and held until those FLEX Options expire at the end of the Outcome Period. In the event an investor purchases Shares after the FLEX Options were entered into or sells

Shares prior to the expiration of the FLEX Options, the returns realized by the investor will not match those that the Fund seeks to provide. An investor that holds Shares through multiple Outcome Periods may fail to experience gains comparable to those of the Underlying ETF over time because at the end of each Outcome Period, a new Cap will be established based on the then-current price of the Underlying ETF and any gains of the Underlying ETF above the prior Cap will be forfeited. In addition, because the Fund is designed to achieve Outcomes that change for each three-month Outcome Period, the Outcomes that are achieved by the Fund for a three-month Outcome Period will be different than the Outcomes achieved by the Fund over multiple Outcome Periods, or on an annualized basis. Similarly, investors holding Shares over multiple Outcome Periods will experience different investment results than holding a fund that has a longer Outcome Period (e.g., one year) and any losses for such holders could exceed the performance for a fund with a longer Outcome Period.

Upside Participation Risk.    There can be no guarantee that the Fund will be successful in its strategy to provide shareholders with returns that match the increases in the price of the Underlying ETF over the Outcome Period, subject to a maximum return imposed by the Cap. In the event an investor purchases Shares after the FLEX Options were entered into or does not stay invested in the Fund for the entirety of the Outcome Period, the returns realized by such investor may not match those that the Fund seeks to achieve. The Fund is subject to a Cap which may be lower relative to other “defined outcome products” and, as a result, any positive investment returns delivered by the Fund may be lower in comparison to such products and to that of the Underlying ETF.

Innovator 20+ Year Treasury Bond 5 Floor ETF - Quarterly | Derivatives Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Derivatives Risk.    To employ the Fund’s defined outcome strategy, the Fund utilizes FLEX Options, which are a type of derivative instrument. The use of derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities and other traditional investments. These risks include: (i) the risk that the counterparty to a derivative transaction may not fulfill its contractual obligations; (ii) risk of mispricing or improper valuation; and (iii) the risk that changes in the value of the derivative may not correlate perfectly with the underlying asset. Derivative prices are highly volatile and may fluctuate substantially during a short period of time. Such prices are influenced by numerous factors that affect the markets, including, but not limited to: (i) changing supply and demand relationships; (ii) government programs and policies; (iii) national and international political and economic events; (iv) changes in interest rates; (v) inflation and deflation; and (vi) changes in supply and demand relationships. Trading derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities. Derivative contracts ordinarily have leverage inherent in their terms, which can magnify potential for gain or loss and, therefore, amplify the effects of market volatility on share price. The Fund has taken the necessary steps to comply with the requirements of Rule 18f-4 under the 1940 Act (“Rule 18f-4”) in its usage of FLEX Options. The Fund has adopted and implements a derivatives risk management program that contains policies and procedures reasonably designed to manage the Fund’s derivatives risks, has appointed a derivatives risk manager who is responsible for administrating the derivatives risk management program, complies with outer limitations on risks relating to its derivatives transactions and carries out enhanced reporting to the Board, the SEC and the public regarding its derivatives activities. To the extent the Fund is noncompliant with Rule 18f-4, the Fund may be required to adjust its investment

portfolio which may, in turn, negatively impact the Fund’s ability to deliver the sought-after Outcomes. In addition to the foregoing, the Fund is subject to the following risks associated with its use of derivative instruments:

Clearing Member Default Risk.    Transactions in some types of derivatives, including FLEX Options, are required to be centrally cleared (“cleared derivatives”). In a transaction involving cleared derivatives, the Fund’s counterparty is a clearing house, such as the OCC, rather than a bank or broker. Since the Fund is not a member of clearing houses and only members of a clearing house (“clearing members”) can participate directly in the clearing house, the Fund will hold cleared derivatives through accounts at clearing members. In cleared derivatives positions, the Fund will make payments (including margin payments) to, and receive payments from, a clearing house through their accounts at clearing members. Customer funds held at a clearing organization in connection with any option contracts are held in a commingled omnibus account and are not identified to the name of the clearing member’s individual customers. As a result, assets deposited by the Fund with any clearing member as margin for its FLEX Options may, in certain circumstances, be used to satisfy losses of other clients of the Fund’s clearing member. In addition, although clearing members guarantee performance of their clients’ obligations to the clearing house, there is a risk that the assets of the Fund might not be fully protected in the event of the clearing member’s bankruptcy. The Fund is also subject to the risk that a limited number of clearing members are willing to transact on the Fund’s behalf, which heightens the risks associated with a clearing member’s default. If a clearing member defaults the Fund could lose some or all of the benefits of a transaction entered into by the Fund with the clearing member. The loss of a clearing member for the Fund to transact with could result in increased transaction costs and other operational issues that could impede the Fund’s ability to implement its investment strategy. If the Fund cannot find a clearing member to transact with on the Fund’s behalf, the Fund may be unable to effectively implement its investment strategy.

Correlation Risk.    The FLEX Options held by the Fund will be exercisable at the strike price only on their expiration date. As a FLEX Option approaches its expiration date, its value typically will increasingly move with the value of the Underlying ETF. However, the value of the FLEX Options may vary prior to the expiration date because of related factors other than the value of the Underlying ETF. The value of the FLEX Options will be determined based upon market quotations or using other recognized pricing methods. Factors that may influence the value of the FLEX Options include interest rate changes and implied volatility levels of the Underlying ETF, among others. The value of the FLEX Options held by the Fund typically do not increase or decrease at the same level as the Underlying ETF’s share price on a day-to-day basis due to these factors (although they generally move in the same direction).

Counterparty Risk.    Counterparty risk is the risk an issuer, guarantor or counterparty of a security in the Fund is unable or unwilling to meet its obligation on the security. Counterparty risk may arise because of the counterparty’s financial condition, market activities, or for other reasons. The Fund may be unable to recover its investment from the counterparty or may obtain a limited and/or delayed recovery. The OCC acts as guarantor and central counterparty with respect to the FLEX Options. As a result, the ability of the Fund to meet its objective

depends on the OCC being able to meet its obligations. In the event an OCC clearing member that is a counterparty of the Fund were to become insolvent, the Fund may have some or all of its FLEX Options closed without its consent or may experience delays or other difficulties in attempting to close or exercise its affected FLEX Options positions, both of which would impair the Fund’s ability to deliver on its investment strategy. The OCC’s rules and procedures are designed to facilitate the prompt settlement of options transactions and exercises, including for clearing member insolvencies. However, there is the risk that the OCC and its backup system will fail if clearing member insolvencies are substantial or widespread. In the unlikely event that the OCC becomes insolvent or is otherwise unable to meet its settlement obligations, the Fund could suffer significant losses.

FLEX Options Risk.    The Fund will utilize FLEX Options issued and guaranteed for settlement by the OCC. The use of option contracts involves investment strategies and risks different from those associated with ordinary portfolio securities transactions. The prices of option contracts are volatile and are influenced by, among other things, actual and anticipated changes in the value of the underlying instrument, changes in interest or currency exchange rates, including the anticipated volatility, which are affected by fiscal and monetary policies and by national and international political, changes in the actual or implied volatility or the reference asset, the time remaining until the expiration of the option contract and economic events. There may at times be an imperfect correlation between the movement in values option contracts and the reference asset, and there may at times not be a liquid secondary market for certain option contracts.

The Fund bears the risk that the OCC will be unable or unwilling to perform its obligations under the FLEX Options contracts. In the unlikely event that the OCC becomes insolvent or is otherwise unable to meet its settlement obligations, the Fund could suffer significant losses. Additionally, FLEX Options may be less liquid than certain other securities, such as standardized options. In less liquid markets for the FLEX Options, the Fund may have difficulty closing out certain FLEX Options positions at desired times and prices. In connection with the creation and redemption of Shares, to the extent market participants are not willing or able to enter into FLEX Option transactions with the Fund at prices that reflect the market price of the Shares, the Fund’s NAV and, in turn the share price of the Fund, could be negatively impacted.

The Fund may experience substantial downside from specific FLEX Option positions and certain FLEX Option positions may expire worthless. The FLEX Options held by the Fund are exercisable at the strike price on their expiration date. As a FLEX Option approaches its expiration date, its value typically increasingly moves with the value of the Underlying ETF. However, prior to such date, the value of the FLEX Options does not increase or decrease at the same rate as the Underlying ETF’s share price on a day-to-day basis (although they generally move in the same direction). The value of the FLEX Options held by the Fund will be determined based on market quotations or other recognized pricing methods. The value of the underlying FLEX Options will be affected by, among others, changes in the Underlying ETF’s share price, changes in interest rates, changes in the actual and implied volatility of the Underlying ETF and the remaining time to until the FLEX Options expire.

Liquidity Risk.    In the event that trading in the underlying FLEX Options is limited or absent, the value of the Fund’s FLEX Options may decrease. There is no guarantee that a liquid secondary trading market will exist for the FLEX Options. The trading in FLEX Options may be less deep and liquid than the market for certain other securities, including certain non-customized option contracts. In a less liquid market for the FLEX Options, terminating the FLEX Options may require the payment of a premium or acceptance of a discounted price and may take longer to complete. Additionally, the liquidation of a large number of FLEX Options may more significantly impact the price in a less liquid market. Further, the Fund requires a sufficient number of participants to facilitate the purchase and sale of options on an exchange to provide liquidity to the Fund for its FLEX Option positions. A less liquid trading market may adversely impact the value of the FLEX Options and the value of your investment.

Innovator 20+ Year Treasury Bond 5 Floor ETF - Quarterly | Underlying ETF Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Underlying ETF Risk.    The Fund’s investment performance largely depends on the investment performance and associated risks of the Underlying ETF. The Underlying ETF is subject to many of the same structural risks as the Fund that are described in more detail herein (see “Risks Associated with ETFs” below). The Adviser expects to waive a portion of its management fee in an amount that equals to any acquired fund fees and expenses the Fund incurs as a result of any direct investment in the Underlying ETF. However, if the Adviser does not waive such expenses in the future, the Fund will bear its proportionate share of the Underlying ETF’s expenses, subjecting Fund shareholders to such expenses. Further, the risks of investing in an ETF also include the risks associated with the underlying investments held by the ETF. As such, the Fund may be subject to the following risks as a result of its exposure to the Underlying ETF (or the components thereof):

Credit Risk.    Credit risk is the risk that an issuer of a security will be unable or unwilling to make dividend, interest and/or principal payments when due and the related risk that the value of such security may decline because of concerns about the issuer’s ability to make such payments.

Debt Securities Risk.    Investments in debt securities subject the holder to the credit risk of the issuer. Credit risk refers to the possibility that the issuer or other obligor of a security will not be able or willing to make payments of interest and principal when due. Generally, the value of debt securities will change inversely with changes in interest rates. To the extent that interest rates rise, certain underlying obligations may be paid off substantially slower than originally anticipated and the value of those securities may fall sharply. During periods of falling interest rates, the income received by the Underlying ETF may decline. If the principal on a debt security is prepaid before expected, the prepayments of principal may have to be reinvested in obligations paying interest at lower rates. Debt securities generally do not trade on a securities exchange making them generally less liquid and more difficult to value than common stock.

Income Risk.    The income of the Underlying ETF could decline due to falling market interest rates. This is because, in a falling interest rate environment, the Underlying ETF generally will have to invest the proceeds from sales of its shares, as well as the proceeds from maturing portfolio securities, or portfolio securities that have been called, in lower-yielding securities.

To the extent the Fund invests directly in shares of the Underlying ETF, any decrease in dividends or distributions received from such investment may lower the Cap and sought-after Floor.

Interest Rate Risk.    Interest rate risk is the risk that the value of the debt securities in the Underlying ETF’s portfolio will decline because of rising market interest rates. Interest rate risk is generally lower for shorter term debt securities and higher for longer-term debt securities. The Underlying ETF may be subject to a greater risk of rising interest rates than would normally be the case due to the current period of historically low rates and the effect of potential government fiscal policy initiatives and resulting market reaction to those initiatives. Duration is a reasonably accurate measure of a debt security’s price sensitivity to changes in interest rates and a common measure of interest rate risk. Duration measures a debt security’s expected life on a present value basis, taking into account the debt security’s yield, interest payments and final maturity. In general, duration represents the expected percentage change in the value of a security for an immediate 1% change in interest rates. For example, the price of a debt security with a three-year duration would be expected to drop by approximately 3% in response to a 1% increase in interest rates. Therefore, prices of debt securities with shorter durations tend to be less sensitive to interest rate changes than debt securities with longer durations. As the value of a debt security changes over time, so will its duration.

Liquidity Risk.    The Underlying ETF may hold certain investments that may be subject to restrictions on resale, trade over-the-counter or in limited volume, or lack an active trading market. Accordingly, the Underlying ETF may not be able to sell or close out of such investments at favorable times or prices (or at all), or at the prices approximating those at which the Underlying ETF currently values them. Illiquid securities may trade at a discount from comparable, more liquid investments and may be subject to wide fluctuations in market value.

U.S. Government Securities Risk.    U.S. government securities are subject to interest rate risk but generally do not involve the credit risks associated with investments in other types of debt securities. As a result, the yields available from U.S. government securities are generally lower than the yields available from other debt securities. U.S. government securities are guaranteed only as to the timely payment of interest and the payment of principal when held to maturity. While securities issued or guaranteed by U.S. federal government agencies (such as Ginnie Mae) are backed by the full faith and credit of the U.S. Department of the Treasury, securities issued by government sponsored entities (such as Fannie Mae and Freddie Mac) are solely the obligation of the issuer and generally do not carry any guarantee from the U.S. government.

U.S. Treasury Obligations Risk.    U.S. Treasury obligations may differ from other securities in their interest rates, maturities, times of issuance and other characteristics and may provide relatively lower returns than those of other securities. Similar to other issuers, changes to the financial condition or credit rating of the U.S. government may cause the value of the Fund’s U.S. Treasury obligations to decline.

Innovator 20+ Year Treasury Bond 5 Floor ETF - Quarterly | Cyber Security Risk [Member]  
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Risk [Text Block]

Cyber Security Risk.    As the use of Internet technology has become more prevalent in the course of business, the investment industry has become more susceptible to potential operational risks through breaches in cyber security. A breach in cyber security refers to both intentional and unintentional events that may cause the Fund to lose proprietary information, suffer data corruption or lose operational capacity. Such events could cause the Fund to incur regulatory penalties, reputational damage, additional compliance costs associated with corrective measures and/or financial loss. Cyber security breaches may involve unauthorized access to the Fund’s digital information systems through “hacking” or malicious software coding, but may also result from outside attacks such as denial-of-service attacks through efforts to make network services unavailable to intended users. In addition, cyber security breaches of the Fund’s third-party service providers, such as its administrator, transfer agent, or custodian can also subject the Fund to many of the same risks associated with direct cyber security breaches. The Fund has established risk management systems designed to reduce the risks associated with cyber security. However, there is no guarantee that such efforts will succeed, especially because the Fund does not directly control the cyber security systems of issuers or third-party service providers.

Innovator 20+ Year Treasury Bond 5 Floor ETF - Quarterly | Market Risk [Member]  
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Risk [Text Block]

Market Risk.    The Fund could lose money over short periods due to short-term market movements and over longer periods during more prolonged market downturns. Assets may decline in value due to factors affecting financial markets generally or particular asset classes or industries represented in the markets. The value of FLEX Options or other assets may also decline due to general market conditions, economic trends or events that are not specifically related to the issuer of the security or other asset, or due to factors that affect a particular issuer or issuers, country, group of countries, region, market, industry, group of industries, sector or asset class. During a general market downturn, multiple asset classes may be negatively affected. Changes in market conditions and interest rates will not have the same impact on all types of securities. Securities, including the Shares, are subject to market fluctuations and liquidity constraints that may be caused by such factors as economic, political, or regulatory developments, changes in interest rates, and/or perceived trends in securities prices. Shares of the Fund could decline in value or underperform other investments. The value of Shares may also decline as a result of market conditions. Factors such as inflation, changes in interest rates, changes in regulatory requirements, bank failures, political climate deterioration or developments, armed conflicts, natural disasters or future health crises, may negatively impact market conditions, and cause a decrease in the value of Shares. Other unexpected political, regulatory and diplomatic events within the U.S. and abroad may affect investor and consumer confidence and may adversely impact financial markets and the broader economy. These events, and any other future events, may adversely affect the prices and liquidity of the Fund’s portfolio investments and could result in disruptions in the trading markets.

Innovator 20+ Year Treasury Bond 5 Floor ETF - Quarterly | Risks Associated with ETFs [Member]  
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Risks Associated with ETFs.    The Fund is an ETF, and therefore, as a result of an ETF’s structure, is subject to the following risks:

Authorized Participant Concentration Risk.    Only an authorized participant may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that may act as authorized participants on an agency basis (i.e., on behalf of other market participants). To the extent that authorized participants exit the business or are unable to proceed with orders for the issuance or redemption of Creation Units and no other authorized participant is able to step forward to fulfill the order, Shares may be more likely to trade at a premium or discount to NAV and possibly face trading halts and/or delisting, and the bid/ask spread (the difference between the price that someone is willing to pay for Shares at a specific point in time versus the price at which someone is willing to sell) on Shares may widen.

Cash Transactions Risk.    The Fund may effectuate all or a portion of the issuance and redemption of Creation Units for cash, rather than in-kind securities. As a result, an investment in the Fund may be less tax-efficient than an investment in an ETF that effectuates its Creation Units only on an in-kind basis. ETFs are able to make in-kind redemptions to avoid being taxed on gains on the distributed portfolio securities at the fund level. A fund that effects redemptions for cash may be required to sell portfolio securities in order to obtain the cash needed to distribute redemption proceeds and may be forced to recognize gains. The Fund intends to distribute gains that arise by virtue of the issuance and redemption of Creation Units being effectuated in cash to shareholders to avoid being taxed on this gain at the fund level and otherwise comply with special tax rules that apply to it. This may cause shareholders to be subject to tax on gains they would not otherwise be subject to, or at an earlier date than if they had made an investment in another ETF. Moreover, cash transactions may have to be carried out over several days if the securities market is relatively illiquid and may involve considerable brokerage fees and taxes. These brokerage fees and taxes, which will be higher than if the Fund sold and redeemed its shares principally in-kind, will be passed on to those purchasing and redeeming Creation Units in the form of creation and redemption transaction fees. The Fund’s use of cash for creations and redemptions could also result in dilution to the Fund and increased transaction costs, which could negatively impact the Fund’s ability to achieve its investment objective.

Market Maker Risk.    If the Fund has lower average daily trading volumes, it may rely on a small number of third-party market makers to provide a market for the purchase and sale of Shares. Any trading halt or other problem relating to the trading activity of these market makers could result in a dramatic change in the spread between the Fund’s NAV and the price at which the Shares are trading on the Exchange, which could result in a decrease in the market price of the Shares. In addition, decisions by market makers or authorized participants to reduce their role or step away from these activities in times of market stress could inhibit the effectiveness of the arbitrage process in maintaining the relationship between the underlying values of the Fund’s portfolio securities and the Fund’s market price. This reduced effectiveness could result in Shares trading at a discount to NAV and in greater than normal intra-day bid-ask spreads for Shares.

Operational Risk.    The Fund is exposed to operational risks arising from a number of factors, including, but not limited to, human error in the calculation of the Cap, processing and communication errors, errors of the Fund’s service providers, counterparties or other third-parties, failed or inadequate processes and technology or systems failures. The Fund and its Adviser and Sub-Adviser seek to reduce these operational risks through controls and procedures. However, these measures do not address every possible risk and may be inadequate to address these risks.

Premium/Discount Risk.    Shares trade on the Exchange at market prices rather than their NAV. The market price of Shares generally corresponds to movements in the Fund’s NAV as well as the relative supply and demand for Shares on the Exchange. The market price may be at, above (a premium) or below (a discount) the Fund’s NAV. Differences in market prices of Shares and the NAV per Share may be due, in large part, to the fact that supply and demand forces at work in the secondary trading market for Shares will be closely related to, but not identical to, the same forces influencing the prices of the Fund’s holdings trading individually or in the aggregate at any point in time. These differences can be especially pronounced during times of market volatility or stress. During these periods, the demand for Shares may decrease considerably and cause the market price of Shares to deviate, and in some cases deviate significantly, from the Fund’s NAV and the bid/ask spread on Shares may widen.

Trading Issues Risk.    Although Shares are listed for trading on the Exchange, there can be no assurance that an active trading market for Shares will develop or be maintained. Trading in Shares on the Exchange may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in Shares inadvisable. In addition, trading in Shares on the Exchange is subject to trading halts caused by extraordinary market volatility pursuant to the Exchange “circuit breaker” rules. Market makers are under no obligation to make a market in the Shares, and authorized participants are not obligated to submit purchase or redemption orders for Creation Units. There can be no assurance that the requirements of the Exchange necessary to maintain the listing of the Fund will continue to be met or will remain unchanged.

Innovator 20+ Year Treasury Bond 5 Floor ETF - Quarterly | Tax Risk [Member]  
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Tax Risk.    The Fund has elected to be treated and intends to qualify each year as a regulated investment company (“RIC”) under Subchapter M of the Code. In order to be treated as a RIC, the Fund must meet certain income, diversification and distribution tests. If, in any year, the Fund fails to qualify as a RIC under the applicable tax laws, the Fund would be taxed as an ordinary corporation. The federal income tax treatment of certain aspects of the proposed operations of the Fund is not entirely clear, which could impact the Fund’s ability to qualify as a RIC. This includes the tax aspects of the Fund’s options strategy, its hedging strategy, the possible application of the “straddle” rules, and various loss limitation provisions of the Code. The Fund’s investments in offsetting positions with respect to the Underlying ETF may affect the character of gains or losses realized by the Fund under the Code’s “straddle” rules and may increase any short-term capital gains realized by the Fund. The Fund intends to treat any income it may derive from the FLEX Options as “qualifying income” under the provisions of the Code applicable to RICs. If the income is not qualifying income or the referenced asset is not appropriately treated as the issuer of the FLEX Options, the Fund could lose its own status as a RIC. To maintain its status as a RIC, the

Fund must distribute, on an annual basis, at least 90% of its investment company taxable income for each taxable year. In addition, to avoid a non-deductible excise tax, the Fund must distribute on a calendar year basis 98% of its ordinary taxable income and 98.2% of its capital gain net income for each taxable year (plus 100% of any undistributed amounts for prior years). Separately, depending upon the circumstances, sales of its portfolio investments (including FLEX Options) to fund redemptions could cause the Fund to recognize income that the Fund is required to distribute to maintain the Fund’s RIC status and avoid the excise tax. Funding such distributions could require additional sales, which could require more distributions and affect the projected performance of the Fund. Alternatively, if the Fund only makes distributions to maintain its RIC status and becomes subject to the excise tax, that could also affect the projected performance of the Fund. In either case, the assets sold to fund redemptions, distributions or pay the excise tax will not be available to assist the Fund in meeting its target outcome. With respect to the RIC diversification test, identifying the issuer can depend on the terms and conditions of a given investment. There is no published Internal Revenue Service guidance or only limited case law on how to determine the “issuer” of certain derivatives that the Fund will enter into. Based upon language in the legislative history, the Fund intends to treat the issuer of the FLEX Options as the referenced asset, which, assuming the referenced asset qualifies as a RIC, would allow the Fund to qualify for special rules in the RIC diversification requirements. The FLEX Options included in the portfolio are exchange-traded options. Under Section 1256 of the Code, certain types of exchange-traded options are treated as if they were sold (i.e., “marked to market”) at the end of each year. The Fund does not believe that the positions held by the Fund will be subject to Section 1256, which means that the positions will not be marked to market. There is a risk that because the offsetting FLEX Options are being held by a single person that the IRS may take the position that the FLEX Options, viewed together, should be treated as a single instrument for federal tax purposes. The result of such a position would be that the Fund would fail the RIC diversification tests causing the RIC to be taxed as an ordinary corporation, unless certain cure rights based upon reasonable cause may apply. The Fund has obtained an opinion of tax counsel that the FLEX Options should not be collapsed into a single instrument. However, such an opinion is not binding upon the IRS or the courts. In the event that a shareholder purchases Shares of the Fund before a distribution by the Fund, the entire distribution may be taxable to the shareholder even though a portion of the distribution effectively represents a return of the purchase price.

Innovator 20+ Year Treasury Bond 5 Floor ETF - Quarterly | Valuation Risk [Member]  
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Valuation Risk.    During periods of reduced market liquidity or in the absence of readily available market quotations for the holdings of the Fund, the valuation of the Fund’s FLEX Options will become more difficult. In market environments where there is reduced availability of reliable objective pricing data, the judgment of the Fund’s investment adviser in determining the fair value of the security may play a greater role. While such determinations may be made in good faith, it may nevertheless be more difficult for the Fund to accurately assign a daily value.

Innovator 20+ Year Treasury Bond 9 Buffer ETF - July | Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] You could lose money by investing in the Fund.
Innovator 20+ Year Treasury Bond 9 Buffer ETF - July | Risk Not Insured Depository Institution [Member]  
Prospectus [Line Items]  
Risk [Text Block] An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency.
Innovator 20+ Year Treasury Bond 9 Buffer ETF - July | Risk Nondiversified Status [Member]  
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Non-Diversification Risk.    The Fund is classified as a “non-diversified company” under the 1940 Act. As a result, the Fund is only limited as to the percentage of its assets which may be invested in the securities of any one issuer by the diversification requirements imposed by the Internal Revenue Code of 1986, as amended (the “Code”). The Fund may invest a relatively high percentage of its assets in a limited number of issuers. As a result, the Fund may be more susceptible to a single adverse economic or regulatory occurrence affecting one or more of these issuers, experience increased volatility and be highly invested in certain issuers.

Innovator 20+ Year Treasury Bond 9 Buffer ETF - July | Defined Outcome Strategy Risk [Member]  
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Defined Outcome Strategy Risk.    The Fund, in employing a “defined outcome strategy” is subject to certain unique risks, which are detailed below.

Buffered Loss Risk.    There can be no guarantee that the Fund will be successful in its strategy to provide buffer protection against Underlying ETF losses if the Underlying ETF’s share price decreases by 9% or less over the duration of the Outcome Period. A shareholder may lose their entire investment. The Fund’s strategy seeks to provide the sought-after protection of the Buffer if Shares are held at the time at which the Fund enters into the FLEX Options and held until those FLEX Options expire at the end of the Outcome Period. In the event an investor purchases Shares after the FLEX Options were entered into or sells Shares prior to the expiration of the FLEX Options, the Buffer that the Fund seeks to provide may not be available. The Fund does not provide principal protection or non-principal protection, and an investor may experience significant losses on its investment, including the loss of its entire investment. To the extent the Fund invests directly in the Underlying ETF, the Buffer will be provided after the consideration of dividends or distributions received, whereby the Fund has assumed an anticipated dividend rate, which is on the historical dividend rate of the Underlying ETF. This assumed dividend rate may be less than dividends actually received by the Fund for the Outcome Period, in which case shareholders may not receive the sought-after downside protection of the Buffer.

Cap Change Risk.    A new Cap is established at the beginning of each Outcome Period and is dependent on prevailing market conditions at the time the Cap is established. As such, the Cap may rise or fall from one Outcome Period to the next and is unlikely to remain the same for consecutive Outcome Periods.

Capped Upside Return Risk.    The Fund’s strategy seeks to provide returns that are subject to the Cap. In the event that the Underlying ETF experiences gains in excess of the Cap for the Outcome Period, the Fund will not participate in, and will underperform the Underlying ETF to the extent of, those gains beyond the Cap. The Fund’s strategy seeks to participate in the upside of the entirety of the Underlying ETF gains (subject to the Cap), if Shares are held at the time at which the Fund enters into the FLEX Options and held until those FLEX Options expire at the end of the Outcome Period. In the event an investor purchases Shares after the FLEX Options were entered into, there may be little or no ability for that investor to experience an investment gain on their Shares. Further, because the FLEX Options are designed to produce the sought-after returns on the last day of the Outcome Period, if an investor sells Shares prior to the expiration date of the FLEX Options such investor may sell at a point where the Fund’s performance does not match the performance of the Underlying ETF over the Outcome Period, and therefore may sell at a point where the Fund has underperformed the Underlying ETF, even if such gains do not exceed the Cap. The Fund seeks to actively manage its portfolio such that any transaction fees incurred by the Fund in connection with the management of the Fund’s assets will not impact the Fund’s performance in seeking to provide upside exposure to the Underlying ETF or the Fund’s ability to experience returns that match the Cap, to the extent the returns of the Underlying ETF are equal to or greater than the Cap. However, it is not guaranteed that the Fund will be able to successfully manage its assets to contemplate the transaction fees incurred by the Fund to achieve the Outcomes sought by the Fund. To the extent the Fund invests directly in the Underlying ETF, the Cap will be provided after the consideration of dividends or distributions received, whereby the

Fund has assumed an anticipated dividend rate, which is on the historical dividend rate of the Underlying ETF. This assumed dividend rate may be less than dividends actually received by the Fund for the Outcome Period, in which case the Cap will be less than disclosed herein.

Investment Objective Risk.    Certain circumstances under which the Fund might not achieve its objective include, but are not limited, to (i) if the Fund disposes of FLEX Options, (ii) if the Fund is unable to maintain the proportional relationship based on the number of FLEX Options in the Fund’s portfolio, (iii) a significant accrual of Fund expenses in connection with effecting the Fund’s principal investment strategy or (iv) adverse tax law changes or interpretations affecting the treatment of FLEX Options. If these factors were to occur, the Fund may be unable to achieve its investment objective, and investors may not receive the Outcomes described herein. Finally, the Fund is also subject to management risk as an actively-managed fund, which may cause it not to achieve its investment objective.

Management Risk.    Defined outcome strategies are actively-managed and accordingly, the Fund is subject to management risk. The Sub-Adviser applies investment techniques and risk analyses in making investment decisions for the Fund, subject to the oversight of the Adviser, but there can be no guarantee that the Sub-Adviser will properly implement the Fund’s investment strategy and therefore the Fund may not achieve its investment objective or its sought-after Outcomes, or perform as well as similarly situated funds.

Outcome Period Risk.    The Fund’s investment strategy is designed to deliver returns that match those of the Underlying ETF if Shares are held from the time the Fund enters into the FLEX Options and held until those FLEX Options expire at the end of the Outcome Period. In the event an investor purchases Shares after the FLEX Options were entered into or sells Shares prior to the expiration of the FLEX Options, the returns realized by the investor will not match those that the Fund seeks to provide. An investor that holds Shares through multiple Outcome Periods may fail to experience gains comparable to those of the Underlying ETF over time because at the end of each Outcome Period, a new Cap will be established based on the then-current price of the Underlying ETF and any gains of the Underlying ETF above the prior Cap will be forfeited.

Upside Participation Risk.    There can be no guarantee that the Fund will be successful in its strategy to provide shareholders with returns that match the increases in the price of the Underlying ETF over the Outcome Period, subject to a maximum return imposed by the Cap. In the event an investor purchases Shares after the FLEX Options were entered into or does not stay invested in the Fund for the entirety of the Outcome Period, the returns realized by such investor may not match those that the Fund seeks to achieve.

Innovator 20+ Year Treasury Bond 9 Buffer ETF - July | Derivatives Risk [Member]  
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Derivatives Risk.    To employ the Fund’s defined outcome strategy, the Fund utilizes FLEX Options, which are a type of derivative instrument. The use of derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities and other traditional investments. These risks include: (i) the risk that the counterparty to a derivative transaction may not fulfill its contractual obligations; (ii) risk of mispricing or improper valuation; and (iii) the risk that changes in the value of the derivative may not correlate perfectly with the underlying asset. Derivative prices are highly volatile and may fluctuate substantially during a short period of time. Such prices are influenced by numerous factors that affect the markets, including,

but not limited to: (i) changing supply and demand relationships; (ii) government programs and policies; (iii) national and international political and economic events; (iv) changes in interest rates; (v) inflation and deflation; and (vi) changes in supply and demand relationships. Trading derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities. Derivative contracts ordinarily have leverage inherent in their terms, which can magnify potential for gain or loss and, therefore, amplify the effects of market volatility on share price. The Fund has taken the necessary steps to comply with the requirements of Rule 18f-4 under the 1940 Act (“Rule 18f-4”) in its usage of FLEX Options. The Fund has adopted and implements a derivatives risk management program that contains policies and procedures reasonably designed to manage the Fund’s derivatives risks, has appointed a derivatives risk manager who is responsible for administrating the derivatives risk management program, complies with outer limitations on risks relating to its derivatives transactions and carries out enhanced reporting to the Board, the SEC and the public regarding its derivatives activities. To the extent the Fund is noncompliant with Rule 18f-4, the Fund may be required to adjust its investment portfolio which may, in turn, negatively impact the Fund’s ability to deliver the sought-after Outcomes. In addition to the foregoing, the Fund is subject to the following risks associated with its use of derivative instruments:

Clearing Member Default Risk.    Transactions in some types of derivatives, including FLEX Options, are required to be centrally cleared (“cleared derivatives”). In a transaction involving cleared derivatives, the Fund’s counterparty is a clearing house, such as the OCC, rather than a bank or broker. Since the Fund is not a member of clearing houses and only members of a clearing house (“clearing members”) can participate directly in the clearing house, the Fund will hold cleared derivatives through accounts at clearing members. In cleared derivatives positions, the Fund will make payments (including margin payments) to, and receive payments from, a clearing house through their accounts at clearing members. Customer funds held at a clearing organization in connection with any option contracts are held in a commingled omnibus account and are not identified to the name of the clearing member’s individual customers. As a result, assets deposited by the Fund with any clearing member as margin for its FLEX Options may, in certain circumstances, be used to satisfy losses of other clients of the Fund’s clearing member. In addition, although clearing members guarantee performance of their clients’ obligations to the clearing house, there is a risk that the assets of the Fund might not be fully protected in the event of the clearing member’s bankruptcy. The Fund is also subject to the risk that a limited number of clearing members are willing to transact on the Fund’s behalf, which heightens the risks associated with a clearing member’s default. If a clearing member defaults the Fund could lose some or all of the benefits of a transaction entered into by the Fund with the clearing member. The loss of a clearing member for the Fund to transact with could result in increased transaction costs and other operational issues that could impede the Fund’s ability to implement its investment strategy. If the Fund cannot find a clearing member to transact with on the Fund’s behalf, the Fund may be unable to effectively implement its investment strategy.

Correlation Risk.    The FLEX Options held by the Fund will be exercisable at the strike price only on their expiration date. As a FLEX Option approaches its expiration date, its value typically will increasingly move with the value of the Underlying ETF. However, the value of the FLEX Options may vary prior to the expiration date because of related factors other

than the value of the Underlying ETF. The value of the FLEX Options will be determined based upon market quotations or using other recognized pricing methods. Factors that may influence the value of the FLEX Options include interest rate changes and implied volatility levels of the Underlying ETF, among others. The value of the FLEX Options held by the Fund typically do not increase or decrease at the same level as the Underlying ETF’s share price on a day-to-day basis due to these factors (although they generally move in the same direction). Since the FLEX Options held by the Fund do not expire until one year after the commencement of the Outcome Period, it is possible that the degree of non-correlation between the value of the FLEX Options and the value of the Underlying ETF will be higher versus FLEX Options with shorter terms.

Counterparty Risk.    Counterparty risk is the risk an issuer, guarantor or counterparty of a security in the Fund is unable or unwilling to meet its obligation on the security. Counterparty risk may arise because of the counterparty’s financial condition, market activities, or for other reasons. The Fund may be unable to recover its investment from the counterparty or may obtain a limited and/or delayed recovery. The OCC acts as guarantor and central counterparty with respect to the FLEX Options. As a result, the ability of the Fund to meet its objective depends on the OCC being able to meet its obligations. In the event an OCC clearing member that is a counterparty of the Fund were to become insolvent, the Fund may have some or all of its FLEX Options closed without its consent or may experience delays or other difficulties in attempting to close or exercise its affected FLEX Options positions, both of which would impair the Fund’s ability to deliver on its investment strategy. The OCC’s rules and procedures are designed to facilitate the prompt settlement of options transactions and exercises, including for clearing member insolvencies. However, there is the risk that the OCC and its backup system will fail if clearing member insolvencies are substantial or widespread. In the unlikely event that the OCC becomes insolvent or is otherwise unable to meet its settlement obligations, the Fund could suffer significant losses.

FLEX Options Risk.    The Fund will utilize FLEX Options issued and guaranteed for settlement by the OCC. The use of option contracts involves investment strategies and risks different from those associated with ordinary portfolio securities transactions. The prices of option contracts are volatile and are influenced by, among other things, actual and anticipated changes in the value of the underlying instrument, changes in interest or currency exchange rates, including the anticipated volatility, which are affected by fiscal and monetary policies and by national and international political, changes in the actual or implied volatility or the reference asset, the time remaining until the expiration of the option contract and economic events. There may at times be an imperfect correlation between the movement in values option contracts and the reference asset, and there may at times not be a liquid secondary market for certain option contracts.

The Fund bears the risk that the OCC will be unable or unwilling to perform its obligations under the FLEX Options contracts. In the unlikely event that the OCC becomes insolvent or is otherwise unable to meet its settlement obligations, the Fund could suffer significant losses. Additionally, FLEX Options may be less liquid than certain other securities, such as standardized options. In less liquid markets for the FLEX Options, the Fund may have difficulty closing out certain FLEX Options positions at desired times and prices. In connection with the creation and redemption of Shares, to the extent market participants are not willing or able

to enter into FLEX Option transactions with the Fund at prices that reflect the market price of the Shares, the Fund’s NAV and, in turn the share price of the Fund, could be negatively impacted.

The Fund may experience substantial downside from specific FLEX Option positions and certain FLEX Option positions may expire worthless. The FLEX Options held by the Fund are exercisable at the strike price on their expiration date. As a FLEX Option approaches its expiration date, its value typically increasingly moves with the value of the Underlying ETF. However, prior to such date, the value of the FLEX Options does not increase or decrease at the same rate as the Underlying ETF’s share price on a day-to-day basis (although they generally move in the same direction). The value of the FLEX Options held by the Fund will be determined based on market quotations or other recognized pricing methods. The value of the underlying FLEX Options will be affected by, among others, changes in the Underlying ETF’s share price, changes in interest rates, changes in the actual and implied volatility of the Underlying ETF and the remaining time to until the FLEX Options expire.

Liquidity Risk.    In the event that trading in the underlying FLEX Options is limited or absent, the value of the Fund’s FLEX Options may decrease. There is no guarantee that a liquid secondary trading market will exist for the FLEX Options. The trading in FLEX Options may be less deep and liquid than the market for certain other securities, including certain non-customized option contracts. In a less liquid market for the FLEX Options, terminating the FLEX Options may require the payment of a premium or acceptance of a discounted price and may take longer to complete. Additionally, the liquidation of a large number of FLEX Options may more significantly impact the price in a less liquid market. Further, the Fund requires a sufficient number of participants to facilitate the purchase and sale of options on an exchange to provide liquidity to the Fund for its FLEX Option positions. A less liquid trading market may adversely impact the value of the FLEX Options and the value of your investment.

Innovator 20+ Year Treasury Bond 9 Buffer ETF - July | Underlying ETF Risk [Member]  
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Underlying ETF Risk.    The Fund’s investment performance largely depends on the investment performance and associated risks of the Underlying ETF. The Underlying ETF is subject to many of the same structural risks as the Fund that are described in more detail herein (see “Risks Associated with ETFs” below). The Adviser expects to waive a portion of its management fee in an amount that equals to any acquired fund fees and expenses the Fund incurs as a result of any direct investment in the Underlying ETF. However, if the Adviser does not waive such expenses in the future, the Fund will bear its proportionate share of the Underlying ETF’s expenses, subjecting Fund shareholders to such expenses. Further, the risks of investing in an ETF also include the risks associated with the underlying investments held by the ETF. As such, the Fund may be subject to the following risks as a result of its exposure to the Underlying ETF (or the components thereof):

Credit Risk.    Credit risk is the risk that an issuer of a security will be unable or unwilling to make dividend, interest and/or principal payments when due and the related risk that the value of such security may decline because of concerns about the issuer’s ability to make such payments.

Debt Securities Risk.    Investments in debt securities subject the holder to the credit risk of the issuer. Credit risk refers to the possibility that the issuer or other obligor of a security will not be able or willing to make payments of interest and principal when due. Generally, the

value of debt securities will change inversely with changes in interest rates. To the extent that interest rates rise, certain underlying obligations may be paid off substantially slower than originally anticipated and the value of those securities may fall sharply. During periods of falling interest rates, the income received by the Underlying ETF may decline. If the principal on a debt security is prepaid before expected, the prepayments of principal may have to be reinvested in obligations paying interest at lower rates. Debt securities generally do not trade on a securities exchange making them generally less liquid and more difficult to value than common stock.

Income Risk.    The income of the Underlying ETF could decline due to falling market interest rates. This is because, in a falling interest rate environment, the Underlying ETF generally will have to invest the proceeds from sales of its shares, as well as the proceeds from maturing portfolio securities, or portfolio securities that have been called, in lower-yielding securities. To the extent the Fund invests directly in shares of the Underlying ETF, any decrease in dividends or distributions received from such investment may lower the Cap and sought-after Floor.

Interest Rate Risk.    Interest rate risk is the risk that the value of the debt securities in the Underlying ETF’s portfolio will decline because of rising market interest rates. Interest rate risk is generally lower for shorter term debt securities and higher for longer-term debt securities. The Underlying ETF may be subject to a greater risk of rising interest rates than would normally be the case due to the current period of historically low rates and the effect of potential government fiscal policy initiatives and resulting market reaction to those initiatives. Duration is a reasonably accurate measure of a debt security’s price sensitivity to changes in interest rates and a common measure of interest rate risk. Duration measures a debt security’s expected life on a present value basis, taking into account the debt security’s yield, interest payments and final maturity. In general, duration represents the expected percentage change in the value of a security for an immediate 1% change in interest rates. For example, the price of a debt security with a three-year duration would be expected to drop by approximately 3% in response to a 1% increase in interest rates. Therefore, prices of debt securities with shorter durations tend to be less sensitive to interest rate changes than debt securities with longer durations. As the value of a debt security changes over time, so will its duration.

Liquidity Risk.    The Underlying ETF may hold certain investments that may be subject to restrictions on resale, trade over-the-counter or in limited volume, or lack an active trading market. Accordingly, the Underlying ETF may not be able to sell or close out of such investments at favorable times or prices (or at all), or at the prices approximating those at which the Underlying ETF currently values them. Illiquid securities may trade at a discount from comparable, more liquid investments and may be subject to wide fluctuations in market value.

U.S. Government Securities Risk.    U.S. government securities are subject to interest rate risk but generally do not involve the credit risks associated with investments in other types of debt securities. As a result, the yields available from U.S. government securities are generally lower than the yields available from other debt securities. U.S. government securities are guaranteed only as to the timely payment of interest and the payment of principal when held to maturity. While securities issued or guaranteed by U.S. federal government agencies (such as Ginnie

Mae) are backed by the full faith and credit of the U.S. Department of the Treasury, securities issued by government sponsored entities (such as Fannie Mae and Freddie Mac) are solely the obligation of the issuer and generally do not carry any guarantee from the U.S. government.

U.S. Treasury Obligations Risk.    U.S. Treasury obligations may differ from other securities in their interest rates, maturities, times of issuance and other characteristics and may provide relatively lower returns than those of other securities. Similar to other issuers, changes to the financial condition or credit rating of the U.S. government may cause the value of the Fund’s U.S. Treasury obligations to decline.

Innovator 20+ Year Treasury Bond 9 Buffer ETF - July | Cyber Security Risk [Member]  
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Cyber Security Risk.    As the use of Internet technology has become more prevalent in the course of business, the investment industry has become more susceptible to potential operational risks through breaches in cyber security. A breach in cyber security refers to both intentional and unintentional events that may cause the Fund to lose proprietary information, suffer data corruption or lose operational capacity. Such events could cause the Fund to incur regulatory penalties, reputational damage, additional compliance costs associated with corrective measures and/or financial loss. Cyber security breaches may involve unauthorized access to the Fund’s digital information systems through “hacking” or malicious software coding, but may also result from outside attacks such as denial-of-service attacks through efforts to make network services unavailable to intended users. In addition, cyber security breaches of the Fund’s third-party service providers, such as its administrator, transfer agent, or custodian can also subject the Fund to many of the same risks associated with direct cyber security breaches. The Fund has established risk management systems designed to reduce the risks associated with cyber security. However, there is no guarantee that such efforts will succeed, especially because the Fund does not directly control the cyber security systems of issuers or third-party service providers.

Innovator 20+ Year Treasury Bond 9 Buffer ETF - July | Market Risk [Member]  
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Market Risk.    The Fund could lose money over short periods due to short-term market movements and over longer periods during more prolonged market downturns. Assets may decline in value due to factors affecting financial markets generally or particular asset classes or industries represented in the markets. The value of FLEX Options or other assets may also decline due to general market conditions, economic trends or events that are not specifically related to the issuer of the security or other asset, or due to factors that affect a particular issuer or issuers, country, group of countries, region, market, industry, group of industries, sector or asset class. During a general market downturn, multiple asset classes may be negatively affected. Changes in market conditions and interest rates will not have the same impact on all types of securities. Securities, including the Shares, are subject to market fluctuations and liquidity constraints that may be caused by such factors as economic, political, or regulatory developments, changes in interest rates, and/or perceived trends in securities prices. Shares of the Fund could decline in value or underperform other investments. The value of Shares may also decline as a result of market conditions. Factors such as inflation, changes in interest rates, changes in regulatory requirements, bank failures, political climate deterioration or developments, armed conflicts, natural disasters or future health crises, may negatively impact market conditions, and cause a decrease in the value of Shares. Other unexpected political, regulatory and diplomatic events within the U.S. and abroad may affect investor and consumer confidence and may adversely impact financial markets and the broader economy. These events, and any other future events, may adversely affect the prices and liquidity of the Fund’s portfolio investments and could result in disruptions in the trading markets.

Innovator 20+ Year Treasury Bond 9 Buffer ETF - July | Risks Associated with ETFs [Member]  
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Risks Associated with ETFs.    The Fund is an ETF, and therefore, as a result of an ETF’s structure, is subject to the following risks:

Authorized Participant Concentration Risk.    Only an authorized participant may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that may act as authorized participants on an agency basis (i.e., on behalf of other market participants). To the extent that authorized participants exit the business or are unable to proceed with orders for the issuance or redemption of Creation Units and no other authorized participant is able to step forward to fulfill the order, Shares may be more likely to trade at a premium or discount to NAV and possibly face trading halts and/or delisting, and the bid/ask spread (the difference between the price that someone is willing to pay for Shares at a specific point in time versus the price at which someone is willing to sell) on Shares may widen.

Cash Transactions Risk.    The Fund may effectuate all or a portion of the issuance and redemption of Creation Units for cash, rather than in-kind securities. As a result, an investment in the Fund may be less tax-efficient than an investment in an ETF that effectuates its Creation Units only on an in-kind basis. ETFs are able to make in-kind redemptions to avoid being taxed on gains on the distributed portfolio securities at the fund level. A fund that effects redemptions for cash may be required to sell portfolio securities in order to obtain the cash needed to distribute redemption proceeds and may be forced to recognize gains. The Fund intends to distribute gains that arise by virtue of the issuance and redemption of Creation Units being effectuated in cash to shareholders to avoid being taxed on this gain at the fund level and otherwise comply with special tax rules that apply to it. This may cause shareholders to be subject to tax on gains they would not otherwise be subject to, or at an earlier date than if they had made an investment in another ETF. Moreover, cash transactions may have to be carried out over several days if the securities market is relatively illiquid and may involve considerable brokerage fees and taxes. These brokerage fees and taxes, which will be higher than if the Fund sold and redeemed its shares principally in-kind, will be passed on to those purchasing and redeeming Creation Units in the form of creation and redemption transaction fees. The Fund’s use of cash for creations and redemptions could also result in dilution to the Fund and increased transaction costs, which could negatively impact the Fund’s ability to achieve its investment objective.

Market Maker Risk.    If the Fund has lower average daily trading volumes, it may rely on a small number of third-party market makers to provide a market for the purchase and sale of Shares. Any trading halt or other problem relating to the trading activity of these market makers could result in a dramatic change in the spread between the Fund’s NAV and the price at which the Shares are trading on the Exchange, which could result in a decrease in the market price of

the Shares. In addition, decisions by market makers or authorized participants to reduce their role or step away from these activities in times of market stress could inhibit the effectiveness of the arbitrage process in maintaining the relationship between the underlying values of the Fund’s portfolio securities and the Fund’s market price. This reduced effectiveness could result in Shares trading at a discount to NAV and in greater than normal intra-day bid-ask spreads for Shares.

Operational Risk.    The Fund is exposed to operational risks arising from a number of factors, including, but not limited to, human error in the calculation of the Cap, processing and communication errors, errors of the Fund’s service providers, counterparties or other third-parties, failed or inadequate processes and technology or systems failures. The Fund and its Adviser and Sub-Adviser seek to reduce these operational risks through controls and procedures. However, these measures do not address every possible risk and may be inadequate to address these risks.

Premium/Discount Risk.    Shares trade on the Exchange at market prices rather than their NAV. The market price of Shares generally corresponds to movements in the Fund’s NAV as well as the relative supply and demand for Shares on the Exchange. The market price may be at, above (a premium) or below (a discount) the Fund’s NAV. Differences in market prices of Shares and the NAV per Share may be due, in large part, to the fact that supply and demand forces at work in the secondary trading market for Shares will be closely related to, but not identical to, the same forces influencing the prices of the Fund’s holdings trading individually or in the aggregate at any point in time. These differences can be especially pronounced during times of market volatility or stress. During these periods, the demand for Shares may decrease considerably and cause the market price of Shares to deviate, and in some cases deviate significantly, from the Fund’s NAV and the bid/ask spread on Shares may widen.

Trading Issues Risk.    Although Shares are listed for trading on the Exchange, there can be no assurance that an active trading market for Shares will develop or be maintained. Trading in Shares on the Exchange may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in Shares inadvisable. In addition, trading in Shares on the Exchange is subject to trading halts caused by extraordinary market volatility pursuant to the Exchange “circuit breaker” rules. Market makers are under no obligation to make a market in the Shares, and authorized participants are not obligated to submit purchase or redemption orders for Creation Units. There can be no assurance that the requirements of the Exchange necessary to maintain the listing of the Fund will continue to be met or will remain unchanged.

Innovator 20+ Year Treasury Bond 9 Buffer ETF - July | Tax Risk [Member]  
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Tax Risk.    The Fund has elected to be treated and intends to qualify each year as a regulated investment company (“RIC”) under Subchapter M of the Code. In order to be treated as a RIC, the Fund must meet certain income, diversification and distribution tests. If, in any year, the Fund fails to qualify as a RIC under the applicable tax laws, the Fund would be taxed as an ordinary corporation. The federal income tax treatment of certain aspects of the proposed operations of the Fund is not entirely clear, which could impact the Fund’s ability to qualify as a RIC. This includes the tax aspects of the Fund’s options strategy, its hedging strategy, the possible application of the “straddle” rules, and various loss limitation provisions of the Code. The Fund’s investments in offsetting positions with respect to the Underlying ETF may affect the character of gains or losses

realized by the Fund under the Code’s “straddle” rules and may increase any short-term capital gains realized by the Fund. The Fund intends to treat any income it may derive from the FLEX Options as “qualifying income” under the provisions of the Code applicable to RICs. If the income is not qualifying income or the referenced asset is not appropriately treated as the issuer of the FLEX Options, the Fund could lose its own status as a RIC. To maintain its status as a RIC, the Fund must distribute, on an annual basis, at least 90% of its investment company taxable income for each taxable year. In addition, to avoid a non-deductible excise tax, the Fund must distribute on a calendar year basis 98% of its ordinary taxable income and 98.2% of its capital gain net income for each taxable year (plus 100% of any undistributed amounts for prior years). Separately, depending upon the circumstances, sales of its portfolio investments (including FLEX Options) to fund redemptions could cause the Fund to recognize income that the Fund is required to distribute to maintain the Fund’s RIC status and avoid the excise tax. Funding such distributions could require additional sales, which could require more distributions and affect the projected performance of the Fund. Alternatively, if the Fund only makes distributions to maintain its RIC status and becomes subject to the excise tax, that could also affect the projected performance of the Fund. In either case, the assets sold to fund redemptions, distributions or pay the excise tax will not be available to assist the Fund in meeting its target outcome. With respect to the RIC diversification test, identifying the issuer can depend on the terms and conditions of a given investment. There is no published Internal Revenue Service guidance or only limited case law on how to determine the “issuer” of certain derivatives that the Fund will enter into. Based upon language in the legislative history, the Fund intends to treat the issuer of the FLEX Options as the referenced asset, which, assuming the referenced asset qualifies as a RIC, would allow the Fund to qualify for special rules in the RIC diversification requirements. The FLEX Options included in the portfolio are exchange-traded options. Under Section 1256 of the Code, certain types of exchange-traded options are treated as if they were sold (i.e., “marked to market”) at the end of each year. The Fund does not believe that the positions held by the Fund will be subject to Section 1256, which means that the positions will not be marked to market. There is a risk that because the offsetting FLEX Options are being held by a single person that the IRS may take the position that the FLEX Options, viewed together, should be treated as a single instrument for federal tax purposes. The result of such a position would be that the Fund would fail the RIC diversification tests causing the RIC to be taxed as an ordinary corporation, unless certain cure rights based upon reasonable cause may apply. The Fund has obtained an opinion of tax counsel that the FLEX Options should not be collapsed into a single instrument. However, such an opinion is not binding upon the IRS or the courts. In the event that a shareholder purchases Shares of the Fund before a distribution by the Fund, the entire distribution may be taxable to the shareholder even though a portion of the distribution effectively represents a return of the purchase price.

Innovator 20+ Year Treasury Bond 9 Buffer ETF - July | Valuation Risk [Member]  
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Valuation Risk.    During periods of reduced market liquidity or in the absence of readily available market quotations for the holdings of the Fund, the valuation of the Fund’s FLEX Options will become more difficult. In market environments where there is reduced availability of reliable objective pricing data, the judgment of the Fund’s investment adviser in determining the fair value of the security may play a greater role. While such determinations may be made in good faith, it may nevertheless be more difficult for the Fund to accurately assign a daily value.

Innovator Buffer Step-Up Strategy ETF | Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] You could lose money by investing in the Fund.
Innovator Buffer Step-Up Strategy ETF | Risk Not Insured Depository Institution [Member]  
Prospectus [Line Items]  
Risk [Text Block] An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency.
Innovator Buffer Step-Up Strategy ETF | Risk Nondiversified Status [Member]  
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Non-Diversification Risk.    The Fund is classified as a “non-diversified company” under the 1940 Act. As a result, the Fund is only limited as to the percentage of its assets which may be invested in the securities of any one issuer by the diversification requirements imposed by the Internal Revenue Code of 1986, as amended (the “Code”). The Fund may invest a relatively high percentage of its assets in a limited number of issuers. As a result, the Fund may be more susceptible to a single adverse economic or regulatory occurrence affecting one or more of these issuers, experience increased volatility and be highly invested in certain issuers.

Innovator Buffer Step-Up Strategy ETF | Investment Strategy Risk [Member]  
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Investment Strategy Risk.    The Fund’s investment strategy subjects it to certain unique risks, which are detailed below.

Buffer Risk.    There can be no guarantee that the Fund will be successful in implementing its strategy to provide Buffer protection with its investment in the Options Portfolio. A shareholder may lose their entire investment. The Buffer is provided at the expiration of the options contracts. Any interim losses experienced by the Underlying ETF may be experienced by the Fund and its shareholders. Because the Options Portfolio provides a Buffer against the first 9% of Underlying ETF losses measured from the time in which the Fund enters into the FLEX Options contracts and only for the duration of the one-year term of the options contract, it is possible that, during the term of any Options Portfolio, shareholders will realize some losses on price decreases of the Underlying ETF. These potential losses are possible even if a shareholder remained in the Fund for a one-year period after an Options Portfolio was established, as it is likely that the Options Portfolio will reset during that time. The Fund does not provide principal protection or non-principal protection, and an investor may experience significant losses on its investment, including the loss of its entire investment. To the extent the Fund invests directly in the Underlying ETF, the Buffer will be provided after the consideration of dividends received, whereby the Fund has assumed an anticipated dividend rate, which is on the historical dividend rate of the Underlying ETF. This assumed dividend rate may be less than dividends actually received by the Fund, in which case investors may not receive the sought-after downside protection of the Buffer.

Concentration Risk.    The Fund will concentrate in the securities of a particular industry or group of industries to the same extent as the Underlying ETF. To the extent the Fund has significant exposure in a single asset class or the securities of issuers within the same country, state, region, industry or sector, an adverse economic, business or political development may affect the value of the Fund’s investments more than if the Fund were more broadly diversified. A significant exposure makes the Fund more susceptible to any single occurrence and may subject the Fund to greater market risk than a fund that is more broadly diversified.

Investment Objective Risk.    Certain circumstances under which the Fund might not achieve its objective include, but are not limited, to (i) if the Fund disposes of FLEX Options, (ii) if the Fund is unable to maintain the proportional relationship based on the number of FLEX Options in the Fund’s portfolio, (iii) a significant accrual of Fund expenses in connection with effecting the Fund’s principal investment strategy or (iv) adverse tax law changes or interpretations affecting the treatment of FLEX Options.

Management Risk.    The Fund is subject to management risk because it is an actively managed portfolio. The Sub-Adviser applies investment techniques and risk analyses in making investment decisions for the Fund, subject to the oversight of the Adviser, but there can be no guarantee that the Sub-Adviser will properly implement the Fund’s investment strategy and therefore the Fund may not achieve its investment objective or perform as well as similarly situated funds.

Market Underperformance Risk.    The Fund’s investment strategy may cause the Fund to underperform the Underlying ETF and/or the S&P 500® Index. The underperformance may be a result of management risk or the implementation of the Fund’s investment strategy.

Step-Up Strategy Risk.    The Fund seeks to provide risk-managed investment exposure to the Underlying ETF through its step-up investment strategy. Because the step-up strategy makes it very unlikely that the Fund will hold an option contract to its expiration, shareholders will likely experience investment results that are very different than if the Fund held the options contracts until expiration and/or those of the Underlying ETF. There is also no guarantee the Fund will be successful in implementing this strategy.

In order to provide the Buffer, the Fund’s strategy is subject to maximum potential gains. This maximum potential gain will likely change at each resetting of the Option’s Portfolio. In the event an investor purchases Shares after the FLEX Option contracts were entered into and prior to the time the Sub-Adviser determines to step-up the Options Portfolio or the expiration of such option contracts, there may be little or no ability for that investor to experience an investment gain on their Shares or little or no ability to benefit from a Buffer protection of the Option Portfolio until the Sub-Adviser rebalances the Fund’s Options Portfolio. However, there is no guarantee that, at the end of any given month, the Fund will be able to enter into a more advantageous Options Portfolio and effectively implement the step-up mechanism. To the extent the Fund invests directly in the Underlying ETF, the maximum upside potential will be calculated after the consideration of dividends received, whereby the Fund has assumed an anticipated dividend rate, which is on the historical dividend rate of the Underlying ETF. This assumed dividend rate may be less than dividends actually received by the Fund, in which case the maximum upside potential for the Fund will be less than such calculated amount.

In addition, the Fund’s step-up strategy may result in performance over certain periods of time that is lower than that of the Underlying ETF or of a fund that is designed to hold an options portfolio until expiration. Because the value of the FLEX Options does not increase or decrease at the same rate as the Underlying ETF’s share price on a day-to-day basis (although they generally move in the same direction) there may be periods of time in which the Fund’s NAV underperforms the return of the Underlying ETF. Accordingly, if the Sub-Adviser rebalances the Options Portfolio prior to its one-year expiration in accordance with the step-up strategy, the Fund may have underperformed the Underlying ETF for that period of time. Similarly, the Sub-Adviser may elect to reset the Fund’s Options Portfolio at a point in time in which the Fund has utilized all or a portion of its Buffer. While this will provide shareholders with the potential of an additional Buffer, the Options Portfolio would simultaneously reset its maximum gain potential and could lower the Fund’s upside performance potential over certain time periods.

Upside Participation Risk.    There can be no guarantee that the Fund will be successful in its strategy to provide shareholders with a return that correlates to increases in the price of the Underlying ETF over time. The Fund may realize different returns than the return of the Underlying ETF until the expiration of the options contracts. In the event the Sub-Adviser utilizes the Fund’s step-up mechanism and resets the Options Portfolio and there is a difference between the NAV performance of the Fund and the return of the Underlying ETF, such difference would result in a shareholder experiencing different returns than the Underlying ETF.

Innovator Buffer Step-Up Strategy ETF | Derivatives Risk [Member]  
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Derivatives Risk.    To employ the Fund’s investment strategy, the Fund utilizes derivative instruments. The use of derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities and other traditional investments.

These risks include: (i) the risk that the counterparty to a derivative transaction may not fulfill its contractual obligations; (ii) risk of mispricing or improper valuation; and (iii) the risk that changes in the value of the derivative may not correlate perfectly with the underlying asset. Derivative prices are highly volatile and may fluctuate substantially during a short period of time. Such prices are influenced by numerous factors that affect the markets, including, but not limited to: (i) changing supply and demand relationships; (ii) government programs and policies; (iii) national and international political and economic events; (iv) changes in interest rates; (v) inflation and deflation; and (vi) changes in supply and demand relationships. Trading derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities. Derivative contracts ordinarily have leverage inherent in their terms, which can magnify potential for gain or loss and, therefore, amplify the effects of market volatility on share price. The Fund has taken the necessary steps to comply with the requirements of Rule 18f-4 under the 1940 Act (“Rule 18f-4”) in its usage of FLEX Options. The Fund has adopted and implements a derivatives risk management program that contains policies and procedures reasonably designed to manage the Fund’s derivatives risks, has appointed a derivatives risk manager who is responsible for administrating the derivatives risk management program, complies with outer limitations on risks relating to its derivatives transactions and carries out enhanced reporting to the Board, the SEC and the public regarding its derivatives activities. To the extent the Fund is noncompliant with Rule 18f-4, the Fund may be required to adjust its investment portfolio which may, in turn, negatively impact the Fund’s ability to achieve its investment objective. In addition to the foregoing, the Fund is subject to the following risks associated with its use of derivative instruments:

Clearing Member Default Risk.    Transactions in some types of derivatives, including FLEX Options, are required to be centrally cleared (“cleared derivatives”). In a transaction involving cleared derivatives, the Fund’s counterparty is a clearing house, such as the OCC, rather than a bank or broker. Since the Fund is not a member of clearing houses and only members of a clearing house (“clearing members”) can participate directly in the clearing house, the Fund will hold cleared derivatives through accounts at clearing members. In cleared derivatives positions, the Fund will make payments (including margin payments) to, and receive payments from, a clearing house through their accounts at clearing members. Customer funds held at a clearing organization in connection with any option contracts are held in a commingled omnibus account and are not identified to the name of the clearing member’s individual customers. As a result, assets deposited by the Fund with any clearing member as margin for its FLEX Options may, in certain circumstances, be used to satisfy losses of other clients of the Fund’s clearing member. In addition, although clearing members guarantee performance of their clients’ obligations to the clearing house, there is a risk that the assets of the Fund might not be fully protected in the event of the clearing member’s bankruptcy. The Fund is also subject to the risk that a limited number of clearing members are willing to transact on the Fund’s behalf, which heightens the risks associated with a clearing member’s default. If a clearing member defaults the Fund could lose some or all of the benefits of a transaction entered into by the Fund with the clearing member. The loss of a clearing member for the Fund to transact with could result in increased transaction costs and other operational issues that could impede the Fund’s ability to implement its investment strategy. If the Fund cannot find a clearing member to transact with on the Fund’s behalf, the Fund may be unable to effectively implement its investment strategy.

Correlation Risk.    The FLEX Options held by the Fund will be exercisable at the strike price only on their expiration date. As a FLEX Option approaches its expiration date, its value typically will increasingly move with the value of the Underlying ETF. However, the value of the FLEX Options may vary prior to the expiration date because of related factors other than the value of the Underlying ETF. The value of the FLEX Options will be determined based upon market quotations or using other recognized pricing methods. Factors that may influence the value of the FLEX Options include interest rate changes and implied volatility levels of the Underlying ETF, among others. The value of the FLEX Options held by the Fund typically do not increase or decrease at the same level as the Underlying ETF’s share price on a day-to-day basis due to these factors (although they generally move in the same direction). Since the FLEX Options held by the Fund have expiration dates of approximately one-year, it is possible that the degree of non-correlation between the value of the FLEX Options and the value of the Underlying ETF will be higher versus FLEX Options with shorter terms.

Counterparty Risk.    Counterparty risk is the risk an issuer, guarantor or counterparty of a security in the Fund is unable or unwilling to meet its obligation on the security. Counterparty risk may arise because of the counterparty’s financial condition, market activities, or for other reasons. The Fund may be unable to recover its investment from the counterparty or may obtain a limited and/or delayed recovery. The OCC acts as guarantor and central counterparty with respect to the FLEX Options. As a result, the ability of the Fund to meet its objective depends on the OCC being able to meet its obligations. In the event an OCC clearing member that is a counterparty of the Fund were to become insolvent, the Fund may have some or all of its FLEX Options closed without its consent or may experience delays or other difficulties in attempting to close or exercise its affected FLEX Options positions, both of which would impair the Fund’s ability to deliver on its investment strategy. The OCC’s rules and procedures are designed to facilitate the prompt settlement of options transactions and exercises, including for clearing member insolvencies. However, there is the risk that the OCC and its backup system will fail if clearing member insolvencies are substantial or widespread. In the unlikely event that the OCC becomes insolvent or is otherwise unable to meet its settlement obligations, the Fund could suffer significant losses.

FLEX Options Risk.    The Fund will utilize FLEX Options issued and guaranteed for settlement by the OCC. The use of option contracts involves investment strategies and risks different from those associated with ordinary portfolio securities transactions. The prices of option contracts are volatile and are influenced by, among other things, actual and anticipated changes in the value of the underlying instrument, changes in interest or currency exchange rates, including the anticipated volatility, which are affected by fiscal and monetary policies and by national and international political, changes in the actual or implied volatility or the reference asset, the time remaining until the expiration of the option contract and economic events. There may at times be an imperfect correlation between the movement in values option contracts and the reference asset, and there may at times not be a liquid secondary market for certain option contracts.

The Fund bears the risk that the OCC will be unable or unwilling to perform its obligations under the FLEX Options contracts. In the unlikely event that the OCC becomes insolvent or is otherwise unable to meet its settlement obligations, the Fund could suffer significant

losses. Additionally, FLEX Options may be less liquid than certain other securities, such as standardized options. In less liquid markets for the FLEX Options, the Fund may have difficulty closing out certain FLEX Options positions at desired times and prices. In connection with the creation and redemption of Shares, to the extent market participants are not willing or able to enter into FLEX Option transactions with the Fund at prices that reflect the market price of the Shares, the Fund’s NAV and, in turn the share price of the Fund, could be negatively impacted.

The Fund may experience substantial downside from specific FLEX Option positions and certain FLEX Option positions may expire worthless. The FLEX Options held by the Fund are exercisable at the strike price on their expiration date. As a FLEX Option approaches its expiration date, its value typically increasingly moves with the value of the Underlying ETF. However, prior to such date, the value of the FLEX Options does not increase or decrease at the same rate as the Underlying ETF’s share price on a day-to-day basis (although they generally move in the same direction). The value of the FLEX Options held by the Fund will be determined based on market quotations or other recognized pricing methods. The value of the underlying FLEX Options will be affected by, among others, changes in the Underlying ETF’s share price, changes in interest rates, changes in the actual and implied volatility of the Underlying ETF and the remaining time to until the FLEX Options expire.

Liquidity Risk.    In the event that trading in the underlying FLEX Options is limited or absent, the value of the Fund’s FLEX Options may decrease. There is no guarantee that a liquid secondary trading market will exist for the FLEX Options. The trading in FLEX Options may be less deep and liquid than the market for certain other securities, including certain non-customized option contracts. In a less liquid market for the FLEX Options, terminating the FLEX Options may require the payment of a premium or acceptance of a discounted price and may take longer to complete. Additionally, the liquidation of a large number of FLEX Options may more significantly impact the price in a less liquid market. Further, the Fund requires a sufficient number of participants to facilitate the purchase and sale of options on an exchange to provide liquidity to the Fund for its FLEX Option positions. A less liquid trading market may adversely impact the value of the FLEX Options and the value of your investment.

Innovator Buffer Step-Up Strategy ETF | Underlying ETF Risk [Member]  
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Underlying ETF Risk.    The Fund’s investment performance largely depends on the investment performance and associated risks of the Underlying ETF. The Underlying ETF is subject to many of the same structural risks as the Fund that are described in more detail herein (see “Risks Associated with ETFs” below). The Adviser expects to waive a portion of its management fee in an amount that equals to any acquired fund fees and expenses the Fund incurs as a result of any direct investment in the Underlying ETF. However, if the Adviser does not waive such expenses in the future, the Fund will bear its proportionate share of the Underlying ETF’s expenses, subjecting Fund shareholders to such expenses. Further, the risks of investing in an ETF also include the risks associated with the underlying investments held by the ETF. As such, the Fund may be subject to the following risks as a result of its exposure to the Underlying ETF (or the components thereof):

Equity Securities Risk.    Equity securities may decline in value because of declines in the price of a particular holding or the broad stock market. Such declines may relate directly to the issuer of a security or broader economic or market events, including changes in interest rates. The value of shares will fluctuate with changes in the value of the equity securities the Underlying ETF invests in.

Information Technology Companies Risk.    Information technology companies face intense competition, both domestically and internationally, which may have an adverse effect on profit margins. Like other technology companies, information technology companies may have limited product lines, markets, financial resources or personnel. The products of information technology companies may face obsolescence due to rapid technological developments, frequent new product introduction, unpredictable changes in growth rates and competition for the services of qualified personnel. Companies in the information technology sector are heavily dependent on patent and intellectual property rights. The loss or impairment of these rights may adversely affect the profitability of these companies. Information technology companies are facing increased government and regulatory scrutiny and may be subject to adverse government or regulatory action.

Large Capitalization Companies Risk.    Large capitalization companies may grow at a slower rate and be less able to adapt to changing market conditions than smaller capitalization companies. Thus, the return on investment in securities of large capitalization companies may be less than the return on investment in securities of small and/or mid capitalization companies. The performance of large capitalization companies also tends to trail the overall market during different market cycles.

Innovator Buffer Step-Up Strategy ETF | Cyber Security Risk [Member]  
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Cyber Security Risk.    As the use of Internet technology has become more prevalent in the course of business, the investment industry has become more susceptible to potential operational risks through breaches in cyber security. A breach in cyber security refers to both intentional and unintentional events that may cause the Fund to lose proprietary information, suffer data corruption or lose operational capacity. Such events could cause the Fund to incur regulatory penalties, reputational damage, additional compliance costs associated with corrective measures and/or financial loss. Cyber security breaches may involve unauthorized access to the Fund’s digital information systems through “hacking” or malicious software coding, but may also result from outside attacks such as denial-of-service attacks through efforts to make network services unavailable to intended users. In addition, cyber security breaches of the Fund’s third-party service providers, such as its administrator, transfer agent, custodian, or issuers in which the Fund invests, can also subject the Fund to many of the same risks associated with direct cyber security breaches. The Fund has established risk management systems designed to reduce the risks associated with cyber security. However, there is no guarantee that such efforts will succeed, especially because the Fund does not directly control the cyber security systems of issuers or third-party service providers.

Innovator Buffer Step-Up Strategy ETF | Market Risk [Member]  
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Market Risk.    The Fund could lose money over short periods due to short-term market movements and over longer periods during more prolonged market downturns. Assets may decline in value due to factors affecting financial markets generally or particular asset classes or industries represented in the markets. The value of FLEX Options or other assets may also decline due to general market conditions, economic trends or events that are not specifically related to the issuer of the security or other asset, or due to factors that affect a particular issuer or issuers, country, group of countries, region, market, industry, group of industries, sector or asset class. During a general market downturn, multiple asset classes may be negatively affected. Changes in market

conditions and interest rates will not have the same impact on all types of securities. Securities, including the Shares, are subject to market fluctuations and liquidity constraints that may be caused by such factors as economic, political, or regulatory developments, changes in interest rates, and/or perceived trends in securities prices. Shares of the Fund could decline in value or underperform other investments. The value of Shares may also decline as a result of market conditions. Factors such as inflation, changes in interest rates, changes in regulatory requirements, bank failures, political climate deterioration or developments, armed conflicts, natural disasters or future health crises, may negatively impact market conditions, and cause a decrease in the value of Shares. Other unexpected political, regulatory and diplomatic events within the U.S. and abroad may affect investor and consumer confidence and may adversely impact financial markets and the broader economy. These events, and any other future events, may adversely affect the prices and liquidity of the Fund’s portfolio investments and could result in disruptions in the trading markets.

Innovator Buffer Step-Up Strategy ETF | Risks Associated with ETFs [Member]  
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Risks Associated with ETFs.    The Fund is an ETF, and therefore, as a result of an ETF’s structure, is subject to the following risks:

Authorized Participant Concentration Risk.    Only an authorized participant may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that may act as authorized participants on an agency basis (i.e., on behalf of other market participants). To the extent that authorized participants exit the business or are unable to proceed with orders for the issuance or redemption of Creation Units and no other authorized participant is able to step forward to fulfill the order, Shares may be more likely to trade at a premium or discount to NAV and possibly face trading halts and/or delisting, and the bid/ask spread (the difference between the price that someone is willing to pay for Shares at a specific point in time versus the price at which someone is willing to sell) on Shares may widen.

Cash Transactions Risk.    The Fund may effectuate all or a portion of the issuance and redemption of Creation Units for cash, rather than in-kind securities. As a result, an investment in the Fund may be less tax-efficient than an investment in an ETF that effectuates its Creation Units only on an in-kind basis. ETFs are able to make in-kind redemptions to avoid being taxed on gains on the distributed portfolio securities at the fund level. A fund that effects redemptions for cash may be required to sell portfolio securities in order to obtain the cash needed to distribute redemption proceeds and may be forced to recognize gains. The Fund intends to distribute gains that arise by virtue of the issuance and redemption of Creation Units being effectuated in cash to shareholders to avoid being taxed on this gain at the fund level and otherwise comply with special tax rules that apply to it. This may cause shareholders to be subject to tax on gains they would not otherwise be subject to, or at an earlier date than if they had made an investment in another ETF. Moreover, cash transactions may have to be

carried out over several days if the securities market is relatively illiquid and may involve considerable brokerage fees and taxes. These brokerage fees and taxes, which will be higher than if the Fund sold and redeemed its shares principally in-kind, will be passed on to those purchasing and redeeming Creation Units in the form of creation and redemption transaction fees. The Fund’s use of cash for creations and redemptions could also result in dilution to the Fund and increased transaction costs, which could negatively impact the Fund’s ability to achieve its investment objective.

Market Maker Risk.    If the Fund has lower average daily trading volumes, it may rely on a small number of third-party market makers to provide a market for the purchase and sale of Shares. Any trading halt or other problem relating to the trading activity of these market makers could result in a dramatic change in the spread between the Fund’s NAV and the price at which the Shares are trading on the Exchange, which could result in a decrease in the market price of the Shares. In addition, decisions by market makers or APs to reduce their role or step away from these activities in times of market stress could inhibit the effectiveness of the arbitrage process in maintaining the relationship between the underlying values of the Fund’s portfolio securities and the Fund’s market price. This reduced effectiveness could result in Shares trading at a discount to NAV and also in greater than normal intra-day bid-ask spreads for Shares.

Operational Risk.    The Fund is exposed to operational risks arising from a number of factors, including, but not limited to, human error in implementation of the Fund’s investment strategy, processing and communication errors, errors of the Fund’s service providers, counterparties or other third-parties, failed or inadequate processes and technology or systems failures. The Fund and its investment adviser and Sub-Adviser seek to reduce these operational risks through controls and procedures. However, these measures do not address every possible risk and may be inadequate to address these risks.

Premium/Discount Risk.    Shares trade on the Exchange at market prices rather than their NAV. The market price of Shares generally corresponds to movements in the Fund’s NAV as well as the relative supply and demand for Shares on the Exchange. The market price may be at, above (a premium) or below (a discount) the Fund’s NAV. Differences in market prices of Shares and the NAV per Share may be due, in large part, to the fact that supply and demand forces at work in the secondary trading market for Shares will be closely related to, but not identical to, the same forces influencing the prices of the Fund’s holdings trading individually or in the aggregate at any point in time. These differences can be especially pronounced during times of market volatility or stress. During these periods, the demand for Shares may decrease considerably and cause the market price of Shares to deviate, and in some cases deviate significantly, from the Fund’s NAV and the bid/ask spread on Shares may widen.

Trading Issues Risk.    Although Shares are listed for trading on the Exchange, there can be no assurance that an active trading market for Shares will develop or be maintained. Trading in Shares on the Exchange may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in Shares inadvisable. In addition, trading in Shares on the Exchange is subject to trading halts caused by extraordinary market volatility pursuant to the Exchange “circuit breaker” rules. Market makers are under no obligation to make a market in the Shares, and authorized participants are not obligated to submit purchase or

redemption orders for Creation Units. There can be no assurance that the requirements of the Exchange necessary to maintain the listing of the Fund will continue to be met or will remain unchanged.

Innovator Buffer Step-Up Strategy ETF | Tax Risk [Member]  
Prospectus [Line Items]  
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Tax Risk.    The Fund has elected to be treated and intends to qualify each year as a regulated investment company (“RIC”) under Subchapter M of the Code. In order to be treated as a RIC, the Fund must meet certain income, diversification and distribution tests. If, in any year, the Fund fails to qualify as a RIC under the applicable tax laws, the Fund would be taxed as an ordinary corporation. The federal income tax treatment of certain aspects of the proposed operations of the Fund is not entirely clear, which could impact the Fund’s ability to qualify as a RIC. This includes the tax aspects of the Fund’s options strategy, its hedging strategy, the possible application of the “straddle” rules, and various loss limitation provisions of the Code. The Fund’s investments in offsetting positions with respect to the Underlying ETF may affect the character of gains or losses realized by the Fund under the Code’s “straddle” rules and may increase any short-term capital gains realized by the Fund. The Fund intends to treat any income it may derive from the FLEX Options as “qualifying income” under the provisions of the Code applicable to RICs. If the income is not qualifying income or the referenced asset is not appropriately treated as the issuer of the FLEX Options, the Fund could lose its own status as a RIC. To maintain its status as a RIC, the Fund must distribute, on an annual basis, at least 90% of its investment company taxable income for each taxable year. In addition, to avoid a non-deductible excise tax, the Fund must distribute on a calendar year basis 98% of its ordinary taxable income and 98.2% of its capital gain net income for each taxable year (plus 100% of any undistributed amounts for prior years). Separately, depending upon the circumstances, sales of its portfolio investments (including FLEX Options) to fund redemptions could cause the Fund to recognize income that the Fund is required to distribute to maintain the Fund’s RIC status and avoid the excise tax. Funding such distributions could require additional sales, which could require more distributions and affect the projected performance of the Fund. Alternatively, if the Fund only makes distributions to maintain its RIC status and becomes subject to the excise tax, that could also affect the projected performance of the Fund. In either case, the assets sold to fund redemptions, distributions or pay the excise tax will not be available to assist the Fund in meeting its target outcome. With respect to the RIC diversification test, identifying the issuer can depend on the terms and conditions of a given investment. There is no published Internal Revenue Service guidance or only limited case law on how to determine the “issuer” of certain derivatives that the Fund will enter into. Based upon language in the legislative history, the Fund intends to treat the issuer of the FLEX Options as the referenced asset, which, assuming the referenced asset qualifies as a RIC, would allow the Fund to qualify for special rules in the RIC diversification requirements. The FLEX Options included in the portfolio are exchange-traded options. Under Section 1256 of the Code, certain types of exchange-traded options are treated as if they were sold (i.e., “marked to market”) at the end of each year. The Fund does not believe that the positions held by the Fund will be subject to Section 1256, which means that the positions will not be marked to market. There is a risk that because the offsetting FLEX Options are being held by a single person that the IRS may take the position that the FLEX Options, viewed together, should be treated as a single instrument for federal tax purposes. The result of such a position would be that the Fund would fail the RIC diversification tests causing the RIC to be taxed as an ordinary corporation, unless certain cure rights based upon reasonable cause may apply. The Fund

has obtained an opinion of tax counsel that the FLEX Options should not be collapsed into a single instrument. However, such an opinion is not binding upon the IRS or the courts. In the event that a shareholder purchases Shares of the Fund before a distribution by the Fund, the entire distribution may be taxable to the shareholder even though a portion of the distribution effectively represents a return of the purchase price.

Innovator Buffer Step-Up Strategy ETF | Valuation Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Valuation Risk.    During periods of reduced market liquidity or in the absence of readily available market quotations for the holdings of the Fund, the valuation of the Fund’s FLEX Options will become more difficult. In market environments where there is reduced availability of reliable objective pricing data, the judgment of the Fund’s investment adviser in determining the fair value of the security may play a greater role. While such determinations may be made in good faith, it may nevertheless be more difficult for the Fund to accurately assign a daily value.

Innovator Defined Wealth Shield ETF | Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] You could lose money by investing in the Fund.
Innovator Defined Wealth Shield ETF | Risk Not Insured Depository Institution [Member]  
Prospectus [Line Items]  
Risk [Text Block] An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency.
Innovator Defined Wealth Shield ETF | Risk Nondiversified Status [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Non-Diversification Risk.    The Fund is classified as a “non-diversified company” under the 1940 Act. As a result, the Fund is only limited as to the percentage of its assets which may be invested in the securities of any one issuer by the diversification requirements imposed by the Internal Revenue Code of 1986, as amended (the “Code”). The Fund may invest a relatively high percentage of its assets in a limited number of issuers. As a result, the Fund may be more susceptible to a single adverse economic or regulatory occurrence affecting one or more of these issuers, experience increased volatility and be highly invested in certain issuers.

Innovator Defined Wealth Shield ETF | Defined Outcome Strategy Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Defined Outcome Strategy Risk.    The Fund, in employing a “defined outcome strategy” is subject to certain unique risks, which are detailed below.

Buffer Change Risk.    The amount of the Buffer is a set percentage established at the beginning of each Outcome Period and is determined based upon the prevailing market conditions at that time. The Fund seeks to provide a Buffer against Underlying ETF losses for each Outcome Period and is expected to be set within a range from 15% to 20% for each Outcome Period, although there is no guarantee that the final Buffer set for an Outcome Period will be within this range. The Buffer may rise or fall from one Outcome Period to the next and is unlikely to remain the same from Outcome Period to Outcome Period. Furthermore, the Buffer may be established at the lower end or below the expected 15% to 20% range for numerous or consecutive Outcome Periods, which would provide the potential for less protection against Underlying ETF losses than if higher Buffers were established during those Outcome Periods.

Buffered Loss Risk.    There can be no guarantee that the Fund will be successful in its strategy to provide buffer protection against Underlying ETF losses if the Underlying ETF’s share price decreases by less than the Buffer over the duration of the Outcome Period. A shareholder may lose their entire investment. The Fund’s strategy seeks to provide the sought-after protection of the Buffer if Shares are held at the time at which the Fund enters into the FLEX Options and held until those FLEX Options expire at the end of the Outcome Period. In the event an investor purchases Shares after the FLEX Options were entered into or sells Shares prior to the expiration of the FLEX Options, the Buffer that the Fund seeks to provide may not be available. The Fund does not provide principal protection or non-principal protection, and an investor may experience significant losses on its investment, including the loss of its entire investment. An investor that holds Shares through multiple Outcome Periods will be unable to recapture losses from prior Outcome Periods because at the end of each Outcome Period, a new Buffer will be established based on the then-current price of the Underlying ETF and any losses experienced below the prior Buffer will be locked-in. Moreover, the quarterly imposition of a new Cap on future gains may make it difficult to recoup any losses from the prior Outcome Periods such that, over multiple Outcome Periods, the Fund may have losses that exceed those of the Underlying ETF. Further, because the Buffer that the Fund seeks to provide may change from one Outcome Period to the next, an investor may not receive the same Buffer across multiple Outcome Periods. To the extent the Fund invests directly in the Underlying ETF, the Buffer will be provided after the consideration of dividends received, whereby the Fund has assumed an anticipated dividend rate, which is on the historical dividend rate of the Underlying ETF. This assumed dividend rate may be less than dividends actually received by the Fund for the Outcome Period, in which case shareholders may not receive the sought-after downside protection of the Buffer.

Cap Change Risk.    A new Cap is established at the beginning of each Outcome Period and is dependent on prevailing market conditions at the time the Cap is established. As such, the Cap may rise or fall from one Outcome Period to the next and is unlikely to remain the same for consecutive Outcome Periods.

Capped Upside Return Risk.    The Fund’s strategy seeks to provide returns that are subject to the Cap. In the event that the Underlying ETF experiences gains in excess of the Cap for the Outcome Period, the Fund will not participate in, and will underperform the Underlying ETF to the extent of, those gains beyond the Cap. The Fund’s strategy seeks to participate in the upside of the entirety of the Underlying ETF gains (subject to the Cap), if Shares are held at the time at which the Fund enters into the FLEX Options and held until those FLEX Options expire at the end of the Outcome Period. In the event an investor purchases Shares after the FLEX Options were entered into, there may be little or no ability for that investor to experience an investment gain on their Shares. Due to the size of the Buffer over each quarterly Outcome Period, the Fund expects its Cap to be lower relative to other “defined outcome products” with an annual outcome period and/or a lower buffer. Further, because the FLEX Options are designed to produce the sought-after returns on the last day of the Outcome Period, if an investor sells Shares prior to the expiration date of the FLEX Options such investor may sell at a point where the Fund’s performance does not match the performance of the Underlying ETF over the Outcome Period, and therefore may sell at a point where the Fund has underperformed the Underlying ETF, even if such gains do not exceed the Cap. The Fund seeks to actively manage its portfolio such that any transaction fees incurred by the Fund in connection with the management of the Fund’s assets will not impact the Fund’s performance in seeking to provide upside exposure to the Underlying ETF or the Fund’s ability to experience returns that match the Cap, to the extent the returns of the Underlying ETF are equal to or greater than the Cap. However, it is not guaranteed that the Fund will be able to successfully manage its assets to contemplate the transaction fees incurred by the Fund to achieve the Outcomes sought by the Fund. An investor that holds Shares through multiple Outcome Periods may fail to experience gains comparable to those of the Underlying ETF over time because at the end of each Outcome Period, a new Cap will be established based on the then-current price of the Underlying ETF and any gains above the prior Cap will be forfeited. To the extent the Fund invests directly in the Underlying ETF, the Cap will be provided after the consideration of dividends received, whereby the Fund has assumed an anticipated dividend rate, which is on the historical dividend rate of the Underlying ETF. This assumed dividend rate may be less than dividends actually received by the Fund for the Outcome Period, in which case the Cap will be less than disclosed herein.

Investment Objective Risk.    Certain circumstances under which the Fund might not achieve its objective include, but are not limited, to (i) if the Fund disposes of FLEX Options, (ii) if the Fund is unable to maintain the proportional relationship based on the number of FLEX Options in the Fund’s portfolio, (iii) a significant accrual of Fund expenses in connection with effecting the Fund’s principal investment strategy or (iv) adverse tax law changes or interpretations affecting the treatment of FLEX Options. If these factors were to occur, the Fund may be unable to achieve its investment objective, and investors may not receive the Outcomes described herein. Finally, the Fund is also subject to management risk as an actively-managed fund, which may cause it not to achieve its investment objective.

Management Risk.    Defined outcome strategies are actively-managed and accordingly, the Fund is subject to management risk. The Sub-Adviser applies investment techniques and risk analyses in making investment decisions for the Fund, subject to the oversight of the

Adviser, but there can be no guarantee that the Sub-Adviser will properly implement the Fund’s investment strategy and therefore the Fund may not achieve its investment objective or its sought-after Outcomes, or perform as well as similarly situated funds.

Outcome Period Risk.    The Fund’s investment strategy is designed to deliver returns that match those of the Underlying ETF if Shares are held from the time the Fund enters into the FLEX Options and held until those FLEX Options expire at the end of the Outcome Period. In the event an investor purchases Shares after the FLEX Options were entered into or sells Shares prior to the expiration of the FLEX Options, the returns realized by the investor will not match those that the Fund seeks to provide. An investor that holds Shares through multiple Outcome Periods may fail to experience gains comparable to those of the Underlying ETF over time because at the end of each Outcome Period, a new Cap will be established based on the then-current price of the Underlying ETF and any gains of the Underlying ETF above the prior Cap will be forfeited. In addition, because the Fund is designed to achieve Outcomes that change for each three-month Outcome Period, the Outcomes that are achieved by the Fund for a three-month Outcome Period will be different than the Outcomes achieved by the Fund over multiple Outcome Periods, or on an annualized basis. Similarly, investors holding Shares over multiple Outcome Periods will experience different investment results than holding a fund that has a longer Outcome Period (e.g., one year) and any losses for such holders could exceed the performance for a fund with a longer Outcome Period.

Upside Participation Risk.    There can be no guarantee that the Fund will be successful in its strategy to provide shareholders with returns that match the increases in the price of the Underlying ETF over the Outcome Period, subject to a maximum return imposed by the Cap. In the event an investor purchases Shares after the FLEX Options were entered into or does not stay invested in the Fund for the entirety of the Outcome Period, the returns realized by such investor may not match those that the Fund seeks to achieve. The Fund is subject to a Cap which may be lower relative to other “defined outcome products” and, as a result, any positive investment returns delivered by the Fund may be lower in comparison to such products and to that of the Underlying ETF.

Innovator Defined Wealth Shield ETF | Derivatives Risk [Member]  
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Derivatives Risk.    To employ the Fund’s defined outcome strategy, the Fund utilizes FLEX Options, which are a type of derivative instrument. The use of derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities and other traditional investments. These risks include: (i) the risk that the counterparty to a derivative transaction may not fulfill its contractual obligations; (ii) risk of mispricing or improper valuation; and (iii) the risk that changes in the value of the derivative may not correlate perfectly with the underlying asset. Derivative prices are highly volatile and may fluctuate substantially during a short period of time. Such prices are influenced by numerous factors that affect the markets, including, but not limited to: (i) changing supply and demand relationships; (ii) government programs and policies; (iii) national and international political and economic events; (iv) changes in interest rates; (v) inflation and deflation; and (vi) changes in supply and demand relationships. Trading derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities. Derivative contracts ordinarily have leverage inherent in their terms, which can magnify potential for gain or loss and, therefore, amplify the effects of market volatility on share price. The Fund has taken the necessary steps to comply with the requirements

of Rule 18f-4 under the 1940 Act (“Rule 18f-4”) in its usage of FLEX Options. The Fund has adopted and implements a derivatives risk management program that contains policies and procedures reasonably designed to manage the Fund’s derivatives risks, has appointed a derivatives risk manager who is responsible for administrating the derivatives risk management program, complies with outer limitations on risks relating to its derivatives transactions and carries out enhanced reporting to the Board, the SEC and the public regarding its derivatives activities. To the extent the Fund is noncompliant with Rule 18f-4, the Fund may be required to adjust its investment portfolio which may, in turn, negatively impact the Fund’s ability to deliver the sought-after Outcomes. In addition to the foregoing, the Fund is subject to the following risks associated with its use of derivative instruments:

Clearing Member Default Risk.    Transactions in some types of derivatives, including FLEX Options, are required to be centrally cleared (“cleared derivatives”). In a transaction involving cleared derivatives, the Fund’s counterparty is a clearing house, such as the OCC, rather than a bank or broker. Since the Fund is not a member of clearing houses and only members of a clearing house (“clearing members”) can participate directly in the clearing house, the Fund will hold cleared derivatives through accounts at clearing members. In cleared derivatives positions, the Fund will make payments (including margin payments) to, and receive payments from, a clearing house through their accounts at clearing members. Customer funds held at a clearing organization in connection with any option contracts are held in a commingled omnibus account and are not identified to the name of the clearing member’s individual customers. As a result, assets deposited by the Fund with any clearing member as margin for its FLEX Options may, in certain circumstances, be used to satisfy losses of other clients of the Fund’s clearing member. In addition, although clearing members guarantee performance of their clients’ obligations to the clearing house, there is a risk that the assets of the Fund might not be fully protected in the event of the clearing member’s bankruptcy. The Fund is also subject to the risk that a limited number of clearing members are willing to transact on the Fund’s behalf, which heightens the risks associated with a clearing member’s default. If a clearing member defaults the Fund could lose some or all of the benefits of a transaction entered into by the Fund with the clearing member. The loss of a clearing member for the Fund to transact with could result in increased transaction costs and other operational issues that could impede the Fund’s ability to implement its investment strategy. If the Fund cannot find a clearing member to transact with on the Fund’s behalf, the Fund may be unable to effectively implement its investment strategy.

Correlation Risk.    The FLEX Options held by the Fund will be exercisable at the strike price only on their expiration date. As a FLEX Option approaches its expiration date, its value typically will increasingly move with the value of the Underlying ETF. However, the value of the FLEX Options may vary prior to the expiration date because of related factors other than the value of the Underlying ETF. The value of the FLEX Options will be determined based upon market quotations or using other recognized pricing methods. Factors that may influence the value of the FLEX Options include interest rate changes and implied volatility levels of the Underlying ETF, among others. The value of the FLEX Options held by the Fund typically do not increase or decrease at the same level as the Underlying ETF’s share price on a day-to-day basis due to these factors (although they generally move in the same direction).

Counterparty Risk.    Counterparty risk is the risk an issuer, guarantor or counterparty of a security in the Fund is unable or unwilling to meet its obligation on the security. Counterparty risk may arise because of the counterparty’s financial condition, market activities, or for other reasons. The Fund may be unable to recover its investment from the counterparty or may obtain a limited and/or delayed recovery. The OCC acts as guarantor and central counterparty with respect to the FLEX Options. As a result, the ability of the Fund to meet its objective depends on the OCC being able to meet its obligations. In the event an OCC clearing member that is a counterparty of the Fund were to become insolvent, the Fund may have some or all of its FLEX Options closed without its consent or may experience delays or other difficulties in attempting to close or exercise its affected FLEX Options positions, both of which would impair the Fund’s ability to deliver on its investment strategy. The OCC’s rules and procedures are designed to facilitate the prompt settlement of options transactions and exercises, including for clearing member insolvencies. However, there is the risk that the OCC and its backup system will fail if clearing member insolvencies are substantial or widespread. In the unlikely event that the OCC becomes insolvent or is otherwise unable to meet its settlement obligations, the Fund could suffer significant losses.

FLEX Options Risk.    The Fund will utilize FLEX Options issued and guaranteed for settlement by the OCC. The use of option contracts involves investment strategies and risks different from those associated with ordinary portfolio securities transactions. The prices of option contracts are volatile and are influenced by, among other things, actual and anticipated changes in the value of the underlying instrument, changes in interest or currency exchange rates, including the anticipated volatility, which are affected by fiscal and monetary policies and by national and international political, changes in the actual or implied volatility or the reference asset, the time remaining until the expiration of the option contract and economic events. There may at times be an imperfect correlation between the movement in values option contracts and the reference asset, and there may at times not be a liquid secondary market for certain option contracts.

The Fund bears the risk that the OCC will be unable or unwilling to perform its obligations under the FLEX Options contracts. In the unlikely event that the OCC becomes insolvent or is otherwise unable to meet its settlement obligations, the Fund could suffer significant losses. Additionally, FLEX Options may be less liquid than certain other securities, such as standardized options. In less liquid markets for the FLEX Options, the Fund may have difficulty closing out certain FLEX Options positions at desired times and prices. In connection with the creation and redemption of Shares, to the extent market participants are not willing or able to enter into FLEX Option transactions with the Fund at prices that reflect the market price of the Shares, the Fund’s NAV and, in turn the share price of the Fund, could be negatively impacted.

The Fund may experience substantial downside from specific FLEX Option positions and certain FLEX Option positions may expire worthless. The FLEX Options held by the Fund are exercisable at the strike price on their expiration date. As a FLEX Option approaches its expiration date, its value typically increasingly moves with the value of the Underlying ETF. However, prior to such date, the value of the FLEX Options does not increase or decrease at the same rate as the Underlying ETF’s share price on a day-to-day basis (although they generally move in the same direction). The value of the FLEX Options held by the Fund will

be determined based on market quotations or other recognized pricing methods. The value of the underlying FLEX Options will be affected by, among others, changes in the Underlying ETF’s share price, changes in interest rates, changes in the actual and implied volatility of the Underlying ETF and the remaining time to until the FLEX Options expire.

Liquidity Risk.    In the event that trading in the underlying FLEX Options is limited or absent, the value of the Fund’s FLEX Options may decrease. There is no guarantee that a liquid secondary trading market will exist for the FLEX Options. The trading in FLEX Options may be less deep and liquid than the market for certain other securities, including certain non-customized option contracts. In a less liquid market for the FLEX Options, terminating the FLEX Options may require the payment of a premium or acceptance of a discounted price and may take longer to complete. Additionally, the liquidation of a large number of FLEX Options may more significantly impact the price in a less liquid market. Further, the Fund requires a sufficient number of participants to facilitate the purchase and sale of options on an exchange to provide liquidity to the Fund for its FLEX Option positions. A less liquid trading market may adversely impact the value of the FLEX Options and the value of your investment.

Innovator Defined Wealth Shield ETF | Underlying ETF Risk [Member]  
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Underlying ETF Risk.    The Fund’s investment performance largely depends on the investment performance and associated risks of the Underlying ETF. The Underlying ETF is subject to many of the same structural risks as the Fund that are described in more detail herein (see “Risks Associated with ETFs” below). The Adviser expects to waive a portion of its management fee in an amount that equals to any acquired fund fees and expenses the Fund incurs as a result of any direct investment in the Underlying ETF. However, if the Adviser does not waive such expenses in the future, the Fund will bear its proportionate share of the Underlying ETF’s expenses, subjecting Fund shareholders to such expenses. Further, the risks of investing in an ETF also include the risks associated with the underlying investments held by the ETF. As such, the Fund may be subject to the following risks as a result of its exposure to the Underlying ETF (or the components thereof):

Equity Securities Risk.    Equity securities may decline in value because of declines in the price of a particular holding or the broad stock market. Such declines may relate directly to the issuer of a security or broader economic or market events, including changes in interest rates. The value of shares will fluctuate with changes in the value of the equity securities the Underlying ETF invests in.

Information Technology Companies Risk.    Information technology companies face intense competition, both domestically and internationally, which may have an adverse effect on profit margins. Like other technology companies, information technology companies may have limited product lines, markets, financial resources or personnel. The products of information technology companies may face obsolescence due to rapid technological developments, frequent new product introduction, unpredictable changes in growth rates and competition for the services of qualified personnel. Companies in the information technology sector are heavily dependent on patent and intellectual property rights. The loss or impairment of these rights may adversely affect the profitability of these companies. Information technology companies are facing increased government and regulatory scrutiny and may be subject to adverse government or regulatory action.

Large Capitalization Companies Risk.    Large capitalization companies may grow at a slower rate and be less able to adapt to changing market conditions than smaller capitalization companies. Thus, the return on investment in securities of large capitalization companies may be less than the return on investment in securities of small and/or mid capitalization companies. The performance of large capitalization companies also tends to trail the overall market during different market cycles.

Innovator Defined Wealth Shield ETF | Concentration Risk [Member]  
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Concentration Risk.    Through its exposure to the Underlying ETF, the Fund will concentrate in the securities of a particular industry or group of industries to the same extent as the Underlying ETF. To the extent the Fund has significant exposure in a single asset class or the securities of issuers within the same country, state, region, industry or sector, an adverse economic, business or political development may affect the value of the Fund’s investments more than if the Fund were more broadly diversified. A significant exposure makes the Fund more susceptible to any single occurrence and may subject the Fund to greater market risk than a fund that is more broadly diversified.

Innovator Defined Wealth Shield ETF | Cyber Security Risk [Member]  
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Cyber Security Risk.    As the use of Internet technology has become more prevalent in the course of business, the investment industry has become more susceptible to potential operational risks through breaches in cyber security. A breach in cyber security refers to both intentional and unintentional events that may cause the Fund to lose proprietary information, suffer data corruption or lose operational capacity. Such events could cause the Fund to incur regulatory penalties, reputational damage, additional compliance costs associated with corrective measures and/or financial loss. Cyber security breaches may involve unauthorized access to the Fund’s digital information systems through “hacking” or malicious software coding, but may also result from outside attacks such as denial-of-service attacks through efforts to make network services unavailable to intended users. In addition, cyber security breaches of the Fund’s third-party service providers, such as its administrator, transfer agent, or custodian can also subject the Fund to many of the same risks associated with direct cyber security breaches. The Fund has established risk management systems designed to reduce the risks associated with cyber security. However, there is no guarantee that such efforts will succeed, especially because the Fund does not directly control the cyber security systems of issuers or third-party service providers.

Innovator Defined Wealth Shield ETF | Market Risk [Member]  
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Market Risk.    The Fund could lose money over short periods due to short-term market movements and over longer periods during more prolonged market downturns. Assets may decline in value due to factors affecting financial markets generally or particular asset classes or industries represented in the markets. The value of FLEX Options or other assets may also decline due to general market conditions, economic trends or events that are not specifically related to the issuer of the security or other asset, or due to factors that affect a particular issuer or issuers, country, group of countries, region, market, industry, group of industries, sector or asset class. During a general market downturn, multiple asset classes may be negatively affected. Changes in market conditions and interest rates will not have the same impact on all types of securities. Securities, including the Shares, are subject to market fluctuations and liquidity constraints that may be caused by such factors as economic, political, or regulatory developments, changes in interest rates, and/or perceived trends in securities prices. Shares of the Fund could decline in value or underperform other investments. The value of Shares may also decline as a result of market conditions. Factors such as inflation, changes in interest rates, changes in regulatory requirements, bank failures, political climate deterioration or developments, armed conflicts, natural disasters or future health

crises, may negatively impact market conditions, and cause a decrease in the value of Shares. Other unexpected political, regulatory and diplomatic events within the U.S. and abroad may affect investor and consumer confidence and may adversely impact financial markets and the broader economy. These events, and any other future events, may adversely affect the prices and liquidity of the Fund’s portfolio investments and could result in disruptions in the trading markets.

Innovator Defined Wealth Shield ETF | Risks Associated with ETFs [Member]  
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Risk [Text Block]

Risks Associated with ETFs.    The Fund is an ETF, and therefore, as a result of an ETF’s structure, is subject to the following risks:

Authorized Participant Concentration Risk.    Only an authorized participant may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that may act as authorized participants on an agency basis (i.e., on behalf of other market participants). To the extent that authorized participants exit the business or are unable to proceed with orders for the issuance or redemption of Creation Units and no other authorized participant is able to step forward to fulfill the order, Shares may be more likely to trade at a premium or discount to NAV and possibly face trading halts and/or delisting, and the bid/ask spread (the difference between the price that someone is willing to pay for Shares at a specific point in time versus the price at which someone is willing to sell) on Shares may widen.

Cash Transactions Risk.    The Fund may effectuate all or a portion of the issuance and redemption of Creation Units for cash, rather than in-kind securities. As a result, an investment in the Fund may be less tax-efficient than an investment in an ETF that effectuates its Creation Units only on an in-kind basis. ETFs are able to make in-kind redemptions to avoid being taxed on gains on the distributed portfolio securities at the fund level. A fund that effects redemptions for cash may be required to sell portfolio securities in order to obtain the cash needed to distribute redemption proceeds and may be forced to recognize gains. The Fund intends to distribute gains that arise by virtue of the issuance and redemption of Creation Units being effectuated in cash to shareholders to avoid being taxed on this gain at the fund level and otherwise comply with special tax rules that apply to it. This may cause shareholders to be subject to tax on gains they would not otherwise be subject to, or at an earlier date than if they had made an investment in another ETF. Moreover, cash transactions may have to be carried out over several days if the securities market is relatively illiquid and may involve considerable brokerage fees and taxes. These brokerage fees and taxes, which will be higher than if the Fund sold and redeemed its shares principally in-kind, will be passed on to those purchasing and redeeming Creation Units in the form of creation and redemption transaction fees. The Fund’s use of cash for creations and redemptions could also result in dilution to the Fund and increased transaction costs, which could negatively impact the Fund’s ability to achieve its investment objective.

Market Maker Risk.    If the Fund has lower average daily trading volumes, it may rely on a small number of third-party market makers to provide a market for the purchase and sale of Shares. Any trading halt or other problem relating to the trading activity of these market makers could result in a dramatic change in the spread between the Fund’s NAV and the price at which the Shares are trading on the Exchange, which could result in a decrease in the market price of the Shares. In addition, decisions by market makers or authorized participants to reduce their role or step away from these activities in times of market stress could inhibit the effectiveness of the arbitrage process in maintaining the relationship between the underlying values of the Fund’s portfolio securities and the Fund’s market price. This reduced effectiveness could result in Shares trading at a discount to NAV and in greater than normal intra-day bid-ask spreads for Shares.

Operational Risk.    The Fund is exposed to operational risks arising from a number of factors, including, but not limited to, human error in the calculation of the Cap, processing and communication errors, errors of the Fund’s service providers, counterparties or other third-parties, failed or inadequate processes and technology or systems failures. The Fund and its Adviser and Sub-Adviser seek to reduce these operational risks through controls and procedures. However, these measures do not address every possible risk and may be inadequate to address these risks.

Premium/Discount Risk.    Shares trade on the Exchange at market prices rather than their NAV. The market price of Shares generally corresponds to movements in the Fund’s NAV as well as the relative supply and demand for Shares on the Exchange. The market price may be at, above (a premium) or below (a discount) the Fund’s NAV. Differences in market prices of Shares and the NAV per Share may be due, in large part, to the fact that supply and demand forces at work in the secondary trading market for Shares will be closely related to, but not identical to, the same forces influencing the prices of the Fund’s holdings trading individually or in the aggregate at any point in time. These differences can be especially pronounced during times of market volatility or stress. During these periods, the demand for Shares may decrease considerably and cause the market price of Shares to deviate, and in some cases deviate significantly, from the Fund’s NAV and the bid/ask spread on Shares may widen.

Trading Issues Risk.    Although Shares are listed for trading on the Exchange, there can be no assurance that an active trading market for Shares will develop or be maintained. Trading in Shares on the Exchange may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in Shares inadvisable. In addition, trading in Shares on the Exchange is subject to trading halts caused by extraordinary market volatility pursuant to the Exchange “circuit breaker” rules. Market makers are under no obligation to make a market in the Shares, and authorized participants are not obligated to submit purchase or redemption orders for Creation Units. There can be no assurance that the requirements of the Exchange necessary to maintain the listing of the Fund will continue to be met or will remain unchanged.

Innovator Defined Wealth Shield ETF | Tax Risk [Member]  
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Tax Risk.    The Fund has elected to be treated and intends to qualify each year as a regulated investment company (“RIC”) under Subchapter M of the Code. In order to be treated as a RIC, the Fund must meet certain income, diversification and distribution tests. If, in any year, the Fund fails to qualify as a RIC under the applicable tax laws, the Fund would be taxed as an ordinary corporation. The federal income tax treatment of certain aspects of the proposed operations of the Fund is not entirely clear, which could impact the Fund’s ability to qualify as a RIC. This includes

the tax aspects of the Fund’s options strategy, its hedging strategy, the possible application of the “straddle” rules, and various loss limitation provisions of the Code. The Fund’s investments in offsetting positions with respect to the Underlying ETF may affect the character of gains or losses realized by the Fund under the Code’s “straddle” rules and may increase any short-term capital gains realized by the Fund. The Fund intends to treat any income it may derive from the FLEX Options as “qualifying income” under the provisions of the Code applicable to RICs. If the income is not qualifying income or the referenced asset is not appropriately treated as the issuer of the FLEX Options, the Fund could lose its own status as a RIC. To maintain its status as a RIC, the Fund must distribute, on an annual basis, at least 90% of its investment company taxable income for each taxable year. In addition, to avoid a non-deductible excise tax, the Fund must distribute on a calendar year basis 98% of its ordinary taxable income and 98.2% of its capital gain net income for each taxable year (plus 100% of any undistributed amounts for prior years). Separately, depending upon the circumstances, sales of its portfolio investments (including FLEX Options) to fund redemptions could cause the Fund to recognize income that the Fund is required to distribute to maintain the Fund’s RIC status and avoid the excise tax. Funding such distributions could require additional sales, which could require more distributions and affect the projected performance of the Fund. Alternatively, if the Fund only makes distributions to maintain its RIC status and becomes subject to the excise tax, that could also affect the projected performance of the Fund. In either case, the assets sold to fund redemptions, distributions or pay the excise tax will not be available to assist the Fund in meeting its target outcome. With respect to the RIC diversification test, identifying the issuer can depend on the terms and conditions of a given investment. There is no published Internal Revenue Service guidance or only limited case law on how to determine the “issuer” of certain derivatives that the Fund will enter into. Based upon language in the legislative history, the Fund intends to treat the issuer of the FLEX Options as the referenced asset, which, assuming the referenced asset qualifies as a RIC, would allow the Fund to qualify for special rules in the RIC diversification requirements. The FLEX Options included in the portfolio are exchange-traded options. Under Section 1256 of the Code, certain types of exchange-traded options are treated as if they were sold (i.e., “marked to market”) at the end of each year. The Fund does not believe that the positions held by the Fund will be subject to Section 1256, which means that the positions will not be marked to market. There is a risk that because the offsetting FLEX Options are being held by a single person that the IRS may take the position that the FLEX Options, viewed together, should be treated as a single instrument for federal tax purposes. The result of such a position would be that the Fund would fail the RIC diversification tests causing the RIC to be taxed as an ordinary corporation, unless certain cure rights based upon reasonable cause may apply. The Fund has obtained an opinion of tax counsel that the FLEX Options should not be collapsed into a single instrument. However, such an opinion is not binding upon the IRS or the courts. In the event that a shareholder purchases Shares of the Fund before a distribution by the Fund, the entire distribution may be taxable to the shareholder even though a portion of the distribution effectively represents a return of the purchase price.

Innovator Defined Wealth Shield ETF | Valuation Risk [Member]  
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Valuation Risk.    During periods of reduced market liquidity or in the absence of readily available market quotations for the holdings of the Fund, the valuation of the Fund’s FLEX Options will become more difficult. In market environments where there is reduced availability of reliable objective pricing data, the judgment of the Fund’s investment adviser in determining the fair value of the security may play a greater role. While such determinations may be made in good faith, it may nevertheless be more difficult for the Fund to accurately assign a daily value.

Innovator Emerging Markets 10 Buffer ETF - Quarterly | Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] You could lose money by investing in the Fund.
Innovator Emerging Markets 10 Buffer ETF - Quarterly | Risk Not Insured Depository Institution [Member]  
Prospectus [Line Items]  
Risk [Text Block] An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency.
Innovator Emerging Markets 10 Buffer ETF - Quarterly | Risk Nondiversified Status [Member]  
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Non-Diversification Risk.    The Fund is classified as a “non-diversified company” under the 1940 Act. As a result, the Fund is only limited as to the percentage of its assets which may be invested in the securities of any one issuer by the diversification requirements imposed by the Internal Revenue Code of 1986, as amended (the “Code”). The Fund may invest a relatively

high percentage of its assets in a limited number of issuers. As a result, the Fund may be more susceptible to a single adverse economic or regulatory occurrence affecting one or more of these issuers, experience increased volatility and be highly invested in certain issuers.

Innovator Emerging Markets 10 Buffer ETF - Quarterly | Defined Outcome Strategy Risk [Member]  
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Defined Outcome Strategy Risk.    The Fund, in employing a “defined outcome strategy” is subject to certain unique risks, which are detailed below.

Buffered Loss Risk.    There can be no guarantee that the Fund will be successful in its strategy to provide buffer protection against Underlying ETF losses if the Underlying ETF’s share price decreases by 10% or less over the duration of the Outcome Period. A shareholder may lose their entire investment. The Fund’s strategy seeks to provide the sought-after protection of the Buffer if Shares are held at the time at which the Fund enters into the FLEX Options and held until those FLEX Options expire at the end of the Outcome Period. In the event an investor purchases Shares after the FLEX Options were entered into or sells Shares prior to the expiration of the FLEX Options, the Buffer that the Fund seeks to provide may not be available. The Fund does not provide principal protection or non-principal protection, and an investor may experience significant losses on its investment, including the loss of its entire investment. An investor that holds Shares through multiple Outcome Periods will be unable to recapture losses from prior Outcome Periods because at the end of each Outcome Period, a new Buffer will be established based on the then-current price of the Underlying ETF and any losses experienced below the prior Buffer will be locked-in. Moreover, the quarterly imposition of a new Cap on future gains may make it difficult to recoup any losses from the prior Outcome Periods such that, over multiple Outcome Periods, the Fund may have losses that exceed those of the Underlying ETF. To the extent the Fund invests directly in the Underlying ETF, the Buffer will be provided after the consideration of dividends received, whereby the Fund has assumed an anticipated dividend rate, which is on the historical dividend rate of the Underlying ETF. This assumed dividend rate may be less than dividends actually received by the Fund for the Outcome Period, in which case shareholders may not receive the sought-after downside protection of the Buffer.

Cap Change Risk.    A new Cap is established at the beginning of each Outcome Period and is dependent on prevailing market conditions at the time the Cap is established. As such, the Cap may rise or fall from one Outcome Period to the next and is unlikely to remain the same for consecutive Outcome Periods.

Capped Upside Return Risk.    The Fund’s strategy seeks to provide returns that are subject to the Cap. In the event that the Underlying ETF experiences gains in excess of the Cap for the Outcome Period, the Fund will not participate in, and will underperform the Underlying ETF to the extent of, those gains beyond the Cap. The Fund’s strategy seeks to participate in the upside of the entirety of the Underlying ETF gains (subject to the Cap), if Shares are held at the time at which the Fund enters into the FLEX Options and held until those FLEX Options expire at the end of the Outcome Period. In the event an investor purchases Shares after the FLEX Options were entered into, there may be little or no ability for that investor to experience an investment gain on their Shares. Due to the size of the Buffer over each quarterly Outcome Period, the Fund expects its Cap to be lower relative to other “defined outcome products” with an annual outcome period and/or a lower buffer. Further, because the FLEX Options are designed to produce the sought-after returns on the last day of the Outcome Period, if an

investor sells Shares prior to the expiration date of the FLEX Options such investor may sell at a point where the Fund’s performance does not match the performance of the Underlying ETF over the Outcome Period, and therefore may sell at a point where the Fund has underperformed the Underlying ETF, even if such gains do not exceed the Cap. The Fund seeks to actively manage its portfolio such that any transaction fees incurred by the Fund in connection with the management of the Fund’s assets will not impact the Fund’s performance in seeking to provide upside exposure to the Underlying ETF or the Fund’s ability to experience returns that match the Cap, to the extent the returns of the Underlying ETF are equal to or greater than the Cap. However, it is not guaranteed that the Fund will be able to successfully manage its assets to contemplate the transaction fees incurred by the Fund to achieve the Outcomes sought by the Fund. An investor that holds Shares through multiple Outcome Periods may fail to experience gains comparable to those of the Underlying ETF over time because at the end of each Outcome Period, a new Cap will be established based on the then-current price of the Underlying ETF and any gains above the prior Cap will be forfeited. To the extent the Fund invests directly in the Underlying ETF, the Cap will be provided after the consideration of dividends received, whereby the Fund has assumed an anticipated dividend rate, which is on the historical dividend rate of the Underlying ETF. This assumed dividend rate may be less than dividends actually received by the Fund for the Outcome Period, in which case the Cap will be less than disclosed herein.

Investment Objective Risk.    Certain circumstances under which the Fund might not achieve its objective include, but are not limited, to (i) if the Fund disposes of FLEX Options, (ii) if the Fund is unable to maintain the proportional relationship based on the number of FLEX Options in the Fund’s portfolio, (iii) a significant accrual of Fund expenses in connection with effecting the Fund’s principal investment strategy or (iv) adverse tax law changes or interpretations affecting the treatment of FLEX Options. If these factors were to occur, the Fund may be unable to achieve its investment objective, and investors may not receive the Outcomes described herein. Finally, the Fund is also subject to management risk as an actively-managed fund, which may cause it not to achieve its investment objective.

Management Risk.    Defined outcome strategies are actively-managed and accordingly, the Fund is subject to management risk. The Sub-Adviser applies investment techniques and risk analyses in making investment decisions for the Fund, subject to the oversight of the Adviser, but there can be no guarantee that the Sub-Adviser will properly implement the Fund’s investment strategy and therefore the Fund may not achieve its investment objective or its sought-after Outcomes, or perform as well as similarly situated funds.

Outcome Period Risk.    The Fund’s investment strategy is designed to deliver returns that match those of the Underlying ETF if Shares are held from the time the Fund enters into the FLEX Options and held until those FLEX Options expire at the end of the Outcome Period. In the event an investor purchases Shares after the FLEX Options were entered into or sells Shares prior to the expiration of the FLEX Options, the returns realized by the investor will not match those that the Fund seeks to provide. An investor that holds Shares through multiple Outcome Periods may fail to experience gains comparable to those of the Underlying ETF over time because at the end of each Outcome Period, a new Cap will be established based on the then-current price of the Underlying ETF and any gains of the Underlying ETF above the prior Cap will be forfeited. In addition, because the Fund is designed to achieve Outcomes that

change for each three-month Outcome Period, the Outcomes that are achieved by the Fund for a three-month Outcome Period will be different than the Outcomes achieved by the Fund over multiple Outcome Periods, or on an annualized basis. Similarly, investors holding Shares over multiple Outcome Periods will experience different investment results than holding a fund that has a longer Outcome Period (e.g., one year) and any losses for such holders could exceed the performance for a fund with a longer Outcome Period.

Upside Participation Risk.    There can be no guarantee that the Fund will be successful in its strategy to provide shareholders with returns that match the increases in the price of the Underlying ETF over the Outcome Period, subject to a maximum return imposed by the Cap. In the event an investor purchases Shares after the FLEX Options were entered into or does not stay invested in the Fund for the entirety of the Outcome Period, the returns realized by such investor may not match those that the Fund seeks to achieve. The Fund is subject to a Cap which may be lower relative to other “defined outcome products” and, as a result, any positive investment returns delivered by the Fund may be lower in comparison to such products and to that of the Underlying ETF.

Innovator Emerging Markets 10 Buffer ETF - Quarterly | Derivatives Risk [Member]  
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Derivatives Risk.    To employ the Fund’s defined outcome strategy, the Fund utilizes FLEX Options, which are a type of derivative instrument. The use of derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities and other traditional investments. These risks include: (i) the risk that the counterparty to a derivative transaction may not fulfill its contractual obligations; (ii) risk of mispricing or improper valuation; and (iii) the risk that changes in the value of the derivative may not correlate perfectly with the underlying asset. Derivative prices are highly volatile and may fluctuate substantially during a short period of time. Such prices are influenced by numerous factors that affect the markets, including, but not limited to: (i) changing supply and demand relationships; (ii) government programs and policies; (iii) national and international political and economic events; (iv) changes in interest rates; (v) inflation and deflation; and (vi) changes in supply and demand relationships. Trading derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities. Derivative contracts ordinarily have leverage inherent in their terms, which can magnify potential for gain or loss and, therefore, amplify the effects of market volatility on share price. The Fund has taken the necessary steps to comply with the requirements of Rule 18f-4 under the 1940 Act (“Rule 18f-4”) in its usage of FLEX Options. The Fund has adopted and implements a derivatives risk management program that contains policies and procedures reasonably designed to manage the Fund’s derivatives risks, has appointed a derivatives risk manager who is responsible for administrating the derivatives risk management program, complies with outer limitations on risks relating to its derivatives transactions and carries out enhanced reporting to the Board, the SEC and the public regarding its derivatives activities. To the extent the Fund is noncompliant with Rule 18f-4, the Fund may be required to adjust its investment portfolio which may, in turn, negatively impact the Fund’s ability to deliver the sought-after Outcomes. In addition to the foregoing, the Fund is subject to the following risks associated with its use of derivative instruments:

Clearing Member Default Risk.    Transactions in some types of derivatives, including FLEX Options, are required to be centrally cleared (“cleared derivatives”). In a transaction involving cleared derivatives, the Fund’s counterparty is a clearing house, such as the OCC, rather than a bank or broker. Since the Fund is not a member of clearing houses and only members of a

clearing house (“clearing members”) can participate directly in the clearing house, the Fund will hold cleared derivatives through accounts at clearing members. In cleared derivatives positions, the Fund will make payments (including margin payments) to, and receive payments from, a clearing house through their accounts at clearing members. Customer funds held at a clearing organization in connection with any option contracts are held in a commingled omnibus account and are not identified to the name of the clearing member’s individual customers. As a result, assets deposited by the Fund with any clearing member as margin for its FLEX Options may, in certain circumstances, be used to satisfy losses of other clients of the Fund’s clearing member. In addition, although clearing members guarantee performance of their clients’ obligations to the clearing house, there is a risk that the assets of the Fund might not be fully protected in the event of the clearing member’s bankruptcy. The Fund is also subject to the risk that a limited number of clearing members are willing to transact on the Fund’s behalf, which heightens the risks associated with a clearing member’s default. If a clearing member defaults the Fund could lose some or all of the benefits of a transaction entered into by the Fund with the clearing member. The loss of a clearing member for the Fund to transact with could result in increased transaction costs and other operational issues that could impede the Fund’s ability to implement its investment strategy. If the Fund cannot find a clearing member to transact with on the Fund’s behalf, the Fund may be unable to effectively implement its investment strategy.

Correlation Risk.    The FLEX Options held by the Fund will be exercisable at the strike price only on their expiration date. As a FLEX Option approaches its expiration date, its value typically will increasingly move with the value of the Underlying ETF. However, the value of the FLEX Options may vary prior to the expiration date because of related factors other than the value of the Underlying ETF. The value of the FLEX Options will be determined based upon market quotations or using other recognized pricing methods. Factors that may influence the value of the FLEX Options include interest rate changes and implied volatility levels of the Underlying ETF, among others. The value of the FLEX Options held by the Fund typically do not increase or decrease at the same level as the Underlying ETF’s share price on a day-to-day basis due to these factors (although they generally move in the same direction). Since the Underlying ETF has the potential to be more volatile than other funds, in the period between the beginning and end of the Outcome Period, it is possible that the degree of non-correlation between the value of the FLEX Options and the value of the Underlying ETF will be higher than if the FLEX Options utilized a less volatile fund as their reference asset.

Counterparty Risk.    Counterparty risk is the risk an issuer, guarantor or counterparty of a security in the Fund is unable or unwilling to meet its obligation on the security. Counterparty risk may arise because of the counterparty’s financial condition, market activities, or for other reasons. The Fund may be unable to recover its investment from the counterparty or may obtain a limited and/or delayed recovery. The OCC acts as guarantor and central counterparty with respect to the FLEX Options. As a result, the ability of the Fund to meet its objective depends on the OCC being able to meet its obligations. In the event an OCC clearing member that is a counterparty of the Fund were to become insolvent, the Fund may have some or all of its FLEX Options closed without its consent or may experience delays or other difficulties in attempting to close or exercise its affected FLEX Options positions, both of which would impair the Fund’s ability to deliver on its investment strategy. The OCC’s rules and procedures

are designed to facilitate the prompt settlement of options transactions and exercises, including for clearing member insolvencies. However, there is the risk that the OCC and its backup system will fail if clearing member insolvencies are substantial or widespread. In the unlikely event that the OCC becomes insolvent or is otherwise unable to meet its settlement obligations, the Fund could suffer significant losses.

FLEX Options Risk.    The Fund will utilize FLEX Options issued and guaranteed for settlement by the OCC. The use of option contracts involves investment strategies and risks different from those associated with ordinary portfolio securities transactions. The prices of option contracts are volatile and are influenced by, among other things, actual and anticipated changes in the value of the underlying instrument, changes in interest or currency exchange rates, including the anticipated volatility, which are affected by fiscal and monetary policies and by national and international political, changes in the actual or implied volatility or the reference asset, the time remaining until the expiration of the option contract and economic events. There may at times be an imperfect correlation between the movement in values option contracts and the reference asset, and there may at times not be a liquid secondary market for certain option contracts.

The Fund bears the risk that the OCC will be unable or unwilling to perform its obligations under the FLEX Options contracts. In the unlikely event that the OCC becomes insolvent or is otherwise unable to meet its settlement obligations, the Fund could suffer significant losses. Additionally, FLEX Options may be less liquid than certain other securities, such as standardized options. In less liquid markets for the FLEX Options, the Fund may have difficulty closing out certain FLEX Options positions at desired times and prices. In connection with the creation and redemption of Shares, to the extent market participants are not willing or able to enter into FLEX Option transactions with the Fund at prices that reflect the market price of the Shares, the Fund’s NAV and, in turn the share price of the Fund, could be negatively impacted.

The Fund may experience substantial downside from specific FLEX Option positions and certain FLEX Option positions may expire worthless. The FLEX Options held by the Fund are exercisable at the strike price on their expiration date. As a FLEX Option approaches its expiration date, its value typically increasingly moves with the value of the Underlying ETF. However, prior to such date, the value of the FLEX Options does not increase or decrease at the same rate as the Underlying ETF’s share price on a day-to-day basis (although they generally move in the same direction). The value of the FLEX Options held by the Fund will be determined based on market quotations or other recognized pricing methods. The value of the underlying FLEX Options will be affected by, among others, changes in the Underlying ETF’s share price, changes in interest rates, changes in the actual and implied volatility of the Underlying ETF and the remaining time to until the FLEX Options expire.

Liquidity Risk.    In the event that trading in the underlying FLEX Options is limited or absent, the value of the Fund’s FLEX Options may decrease. There is no guarantee that a liquid secondary trading market will exist for the FLEX Options. The trading in FLEX Options may be less deep and liquid than the market for certain other securities, including certain non-customized option contracts. In a less liquid market for the FLEX Options, terminating the FLEX Options may require the payment of a premium or acceptance of a discounted price

and may take longer to complete. Additionally, the liquidation of a large number of FLEX Options may more significantly impact the price in a less liquid market. Further, the Fund requires a sufficient number of participants to facilitate the purchase and sale of options on an exchange to provide liquidity to the Fund for its FLEX Option positions. A less liquid trading market may adversely impact the value of the FLEX Options and the value of your investment.

Innovator Emerging Markets 10 Buffer ETF - Quarterly | Underlying ETF Risk [Member]  
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Underlying ETF Risk.    The Fund’s investment performance largely depends on the investment performance and associated risks of the Underlying ETF. The Underlying ETF is subject to many of the same structural risks as the Fund that are described in more detail herein (see “Risks Associated with ETFs” below). The Adviser expects to waive a portion of its management fee in an amount that equals to any acquired fund fees and expenses the Fund incurs as a result of any direct investment in the Underlying ETF. However, if the Adviser does not waive such expenses in the future, the Fund will bear its proportionate share of the Underlying ETF’s expenses, subjecting Fund shareholders to such expenses. Further, the risks of investing in an ETF also include the risks associated with the underlying investments held by the ETF. As such, the Fund may be subject to the following risks as a result of its exposure to the Underlying ETF (or the components thereof):

Asia Risk.    Many Asian economies have experienced rapid growth and industrialization, and there is no assurance that this growth rate will be maintained. Some Asian economies are highly dependent on trade, and economic conditions in other countries within and outside Asia can impact these economies. Certain of these economies may be adversely affected by trade or policy disputes with its major trade partners. There is also a high concentration of market capitalization and trading volume in a small number of issuers representing a limited number of industries, as well as a high concentration of investors and financial intermediaries. Certain Asian countries have experienced and may in the future experience expropriation and nationalization of assets, confiscatory taxation, currency manipulation, political instability, armed conflict and social instability as a result of religious, ethnic, socio-economic and/or political unrest. In particular, escalated tensions involving North Korea and any outbreak of hostilities involving North Korea could have a severe adverse effect on Asian economies. Governments of certain Asian countries have exercised, and continue to exercise, substantial influence over many aspects of the private sector. In certain cases, the government owns or controls many companies, including the largest in the country. Accordingly, government actions could have a significant effect on the issuers of the Fund’s securities or on economic conditions generally.

China Risk.    China is an emerging market and demonstrates significantly higher volatility from time to time in comparison to developed markets. The central government has historically exercised substantial control over virtually every sector of the Chinese economy through administrative regulation and/or state ownership and actions of the Chinese central and local government authorities continue to have a substantial effect on economic conditions in China. Export growth continues to be a major driver of China’s rapid economic growth. Reduction in spending on Chinese products and services, institution of tariffs or other trade barriers, or a downturn in any of the economies of China’s key trading partners may have an adverse impact on the Chinese economy. Recent developments in relations between the U.S. and China have heightened concerns of increased tariffs and restrictions on trade between the two countries. An increase in tariffs or trade restrictions, or even the threat of such developments, could

lead to a significant reduction in international trade, which could have a negative impact on China’s export industry and a commensurately negative impact on the Fund. From time to time, including the COVID-19 pandemic (as defined below), China has experienced outbreaks of infectious illnesses, and the country may be subject to other public health threats, infectious illnesses, diseases or similar issues in the future. Any spread of an infectious illness, public health threat or similar issue could reduce consumer demand or economic output, result in market closures, travel restrictions or quarantines, and generally have a significant impact on the Chinese economy, which in turn could adversely affect the Fund’s investments.

Currency Risk.    Changes in currency exchange rates affect the value of investments denominated in a non-U.S. currency. The value of investments held by the Underlying ETF, and therefore the value of the Underlying ETF, could change based on changes in currency exchange rates. The Fund’s NAV could therefore decline based on changes in the value of currencies or if there are delays or limits on repatriation of such currency. Currency exchange rates can be very volatile and can change quickly and unpredictably.

Emerging Markets Risk.    Exposure to companies operating in emerging market countries involve additional risks relating to political, economic, or regulatory conditions not associated with investments in securities and instruments issued by U.S. companies or by companies operating in other developed market countries. Investments in emerging market securities are generally considered speculative in nature and are subject to the following heightened risks: smaller market capitalization of securities markets which may suffer periods of relative illiquidity; significant price volatility; restrictions on foreign investment; possible repatriation of investment income and capital; rapid inflation; and currency convertibility issues. Emerging market countries also often have less uniformity in accounting and reporting requirements, unsettled securities laws, unreliable securities valuation and greater risk associated with custody of securities. This can create difficulties in evaluating emerging market companies due to lower quality or less available financial information. Emerging market companies are also subject to a greater risk of market closure or manipulation, less liquidity, limited reliable access to capital and exchange delisting. Furthermore, investors may be required to register the proceeds of sales and future economic or political crises could lead to price controls, forced mergers, expropriation or confiscatory taxation, seizure, nationalization or creation of government monopolies. The rights and remedies available to investors in emerging market securities may be more limited than those available for investors in more developed markets. The limitations associated with investments in emerging market companies may impact the Fund’s ability to achieve its investment objective.

Equity Securities Risk.    Equity securities may decline in value because of declines in the price of a particular holding or the broad stock market. Such declines may relate directly to the issuer of a security or broader economic or market events, including changes in interest rates. The value of shares will fluctuate with changes in the value of the equity securities the Underlying ETF invests in.

Financials Sector Risk.    Financial companies, such as retail and commercial banks, insurance companies and financial services companies, are especially subject to the adverse effects of economic recession, currency exchange rates, extensive government regulation, decreases

in the availability of capital, volatile interest rates, portfolio concentrations in geographic markets, industries or products (such as commercial and residential real estate loans) and competition from new entrants and blurred distinctions in their fields of business.

Information Technology Companies Risk.    Information technology companies face intense competition, both domestically and internationally, which may have an adverse effect on profit margins. Like other technology companies, information technology companies may have limited product lines, markets, financial resources or personnel. The products of information technology companies may face obsolescence due to rapid technological developments, frequent new product introduction, unpredictable changes in growth rates and competition for the services of qualified personnel. Companies in the information technology sector are heavily dependent on patent and intellectual property rights. The loss or impairment of these rights may adversely affect the profitability of these companies. Information technology companies are facing increased government and regulatory scrutiny and may be subject to adverse government or regulatory action.

Large Capitalization Companies Risk.    Large capitalization companies may grow at a slower rate and be less able to adapt to changing market conditions than smaller capitalization companies. Thus, the return on investment in securities of large capitalization companies may be less than the return on investment in securities of small and/or mid capitalization companies. The performance of large capitalization companies also tends to trail the overall market during different market cycles.

Non-U.S. Securities Risk.    An investment in securities of non-U.S. companies involves risks not associated with domestic issuers. Non-U.S. securities are subject to higher volatility than securities of domestic issuers due to possible adverse political, social or economic developments, restrictions on foreign investment or exchange of securities, lack of liquidity, currency exchange rates, excessive taxation, government seizure of assets, different legal or accounting standards, and less government supervision and regulation of securities exchanges in foreign countries.

Smaller Companies Risk.    The Underlying ETF invests in the securities of small and/or mid capitalization companies, which results in the Fund having significant exposure to such companies through its exposure to the Underlying ETF by virtue of its usage of FLEX Options. Small and/or mid capitalization companies may be more vulnerable to adverse general market or economic developments, and their securities may be less liquid and may experience greater price volatility than larger, more established companies as a result of several factors, including limited trading volumes, fewer products or financial resources, management inexperience and less publicly available information. Accordingly, such companies are generally subject to greater market risk than larger, more established companies.

Innovator Emerging Markets 10 Buffer ETF - Quarterly | Concentration Risk [Member]  
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Concentration Risk.    Through its exposure to the Underlying ETF, the Fund will concentrate in the securities of a particular industry or group of industries to the same extent as the Underlying ETF. To the extent the Fund has significant exposure in a single asset class or the securities of issuers within the same country, state, region, industry or sector, an adverse economic, business or political development may affect the value of the Fund’s investments more than if the Fund

were more broadly diversified. A significant exposure makes the Fund more susceptible to any single occurrence and may subject the Fund to greater market risk than a fund that is more broadly diversified.

Innovator Emerging Markets 10 Buffer ETF - Quarterly | Cyber Security Risk [Member]  
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Cyber Security Risk.    As the use of Internet technology has become more prevalent in the course of business, the investment industry has become more susceptible to potential operational risks through breaches in cyber security. A breach in cyber security refers to both intentional and unintentional events that may cause the Fund to lose proprietary information, suffer data corruption or lose operational capacity. Such events could cause the Fund to incur regulatory penalties, reputational damage, additional compliance costs associated with corrective measures and/or financial loss. Cyber security breaches may involve unauthorized access to the Fund’s digital information systems through “hacking” or malicious software coding, but may also result from outside attacks such as denial-of-service attacks through efforts to make network services unavailable to intended users. In addition, cyber security breaches of the Fund’s third-party service providers, such as its administrator, transfer agent, or custodian can also subject the Fund to many of the same risks associated with direct cyber security breaches. The Fund has established risk management systems designed to reduce the risks associated with cyber security. However, there is no guarantee that such efforts will succeed, especially because the Fund does not directly control the cyber security systems of issuers or third-party service providers.

Innovator Emerging Markets 10 Buffer ETF - Quarterly | Market Risk [Member]  
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Market Risk.    The Fund could lose money over short periods due to short-term market movements and over longer periods during more prolonged market downturns. Assets may decline in value due to factors affecting financial markets generally or particular asset classes or industries represented in the markets. The value of FLEX Options or other assets may also decline due to general market conditions, economic trends or events that are not specifically related to the issuer of the security or other asset, or due to factors that affect a particular issuer or issuers, country, group of countries, region, market, industry, group of industries, sector or asset class. During a general market downturn, multiple asset classes may be negatively affected. Changes in market conditions and interest rates will not have the same impact on all types of securities. Securities, including the Shares, are subject to market fluctuations and liquidity constraints that may be caused by such factors as economic, political, or regulatory developments, changes in interest rates, and/or perceived trends in securities prices. Shares of the Fund could decline in value or underperform other investments. The value of Shares may also decline as a result of market conditions. Factors such as inflation, changes in interest rates, changes in regulatory requirements, bank failures, political climate deterioration or developments, armed conflicts, natural disasters or future health crises, may negatively impact market conditions, and cause a decrease in the value of Shares. Other unexpected political, regulatory and diplomatic events within the U.S. and abroad may affect investor and consumer confidence and may adversely impact financial markets and the broader economy. These events, and any other future events, may adversely affect the prices and liquidity of the Fund’s portfolio investments and could result in disruptions in the trading markets.

Innovator Emerging Markets 10 Buffer ETF - Quarterly | Risks Associated with ETFs [Member]  
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Risks Associated with ETFs.    The Fund is an ETF, and therefore, as a result of an ETF’s structure, is subject to the following risks:

Authorized Participant Concentration Risk.    Only an authorized participant may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that may act as authorized participants on an agency basis (i.e., on behalf of other market participants). To the extent that authorized participants exit the business or are unable to proceed with orders for the issuance or redemption of Creation Units and no other authorized participant is able to step forward to fulfill the order, Shares may be more likely to trade at a premium or discount to NAV and possibly face trading halts and/or delisting, and the bid/ask spread (the difference between the price that someone is willing to pay for Shares at a specific point in time versus the price at which someone is willing to sell) on Shares may widen.

Cash Transactions Risk.    The Fund may effectuate all or a portion of the issuance and redemption of Creation Units for cash, rather than in-kind securities. As a result, an investment in the Fund may be less tax-efficient than an investment in an ETF that effectuates its Creation Units only on an in-kind basis. ETFs are able to make in-kind redemptions to avoid being taxed on gains on the distributed portfolio securities at the fund level. A fund that effects redemptions for cash may be required to sell portfolio securities in order to obtain the cash needed to distribute redemption proceeds and may be forced to recognize gains. The Fund intends to distribute gains that arise by virtue of the issuance and redemption of Creation Units being effectuated in cash to shareholders to avoid being taxed on this gain at the fund level and otherwise comply with special tax rules that apply to it. This may cause shareholders to be subject to tax on gains they would not otherwise be subject to, or at an earlier date than if they had made an investment in another ETF. Moreover, cash transactions may have to be carried out over several days if the securities market is relatively illiquid and may involve considerable brokerage fees and taxes. These brokerage fees and taxes, which will be higher than if the Fund sold and redeemed its shares principally in-kind, will be passed on to those purchasing and redeeming Creation Units in the form of creation and redemption transaction fees. The Fund’s use of cash for creations and redemptions could also result in dilution to the Fund and increased transaction costs, which could negatively impact the Fund’s ability to achieve its investment objective.

Market Maker Risk.    If the Fund has lower average daily trading volumes, it may rely on a small number of third-party market makers to provide a market for the purchase and sale of Shares. Any trading halt or other problem relating to the trading activity of these market makers could result in a dramatic change in the spread between the Fund’s NAV and the price at which the Shares are trading on the Exchange, which could result in a decrease in the market price of the Shares. In addition, decisions by market makers or authorized participants to reduce their role or step away from these activities in times of market stress could inhibit the effectiveness of the arbitrage process in maintaining the relationship between the underlying values of

the Fund’s portfolio securities and the Fund’s market price. This reduced effectiveness could result in Shares trading at a discount to NAV and in greater than normal intra-day bid-ask spreads for Shares.

Operational Risk.    The Fund is exposed to operational risks arising from a number of factors, including, but not limited to, human error in the calculation of the Cap, processing and communication errors, errors of the Fund’s service providers, counterparties or other third-parties, failed or inadequate processes and technology or systems failures. The Fund and its Adviser and Sub-Adviser seek to reduce these operational risks through controls and procedures. However, these measures do not address every possible risk and may be inadequate to address these risks.

Premium/Discount Risk.    Shares trade on the Exchange at market prices rather than their NAV. The market price of Shares generally corresponds to movements in the Fund’s NAV as well as the relative supply and demand for Shares on the Exchange. The market price may be at, above (a premium) or below (a discount) the Fund’s NAV. Differences in market prices of Shares and the NAV per Share may be due, in large part, to the fact that supply and demand forces at work in the secondary trading market for Shares will be closely related to, but not identical to, the same forces influencing the prices of the Fund’s holdings trading individually or in the aggregate at any point in time. These differences can be especially pronounced during times of market volatility or stress. During these periods, the demand for Shares may decrease considerably and cause the market price of Shares to deviate, and in some cases deviate significantly, from the Fund’s NAV and the bid/ask spread on Shares may widen.

Trading Issues Risk.    Although Shares are listed for trading on the Exchange, there can be no assurance that an active trading market for Shares will develop or be maintained. Trading in Shares on the Exchange may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in Shares inadvisable. In addition, trading in Shares on the Exchange is subject to trading halts caused by extraordinary market volatility pursuant to the Exchange “circuit breaker” rules. Market makers are under no obligation to make a market in the Shares, and authorized participants are not obligated to submit purchase or redemption orders for Creation Units. There can be no assurance that the requirements of the Exchange necessary to maintain the listing of the Fund will continue to be met or will remain unchanged.

Innovator Emerging Markets 10 Buffer ETF - Quarterly | Tax Risk [Member]  
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Tax Risk.    The Fund has elected to be treated and intends to qualify each year as a regulated investment company (“RIC”) under Subchapter M of the Code. In order to be treated as a RIC, the Fund must meet certain income, diversification and distribution tests. If, in any year, the Fund fails to qualify as a RIC under the applicable tax laws, the Fund would be taxed as an ordinary corporation. The federal income tax treatment of certain aspects of the proposed operations of the Fund is not entirely clear, which could impact the Fund’s ability to qualify as a RIC. This includes the tax aspects of the Fund’s options strategy, its hedging strategy, the possible application of the “straddle” rules, and various loss limitation provisions of the Code. The Fund’s investments in offsetting positions with respect to the Underlying ETF may affect the character of gains or losses realized by the Fund under the Code’s “straddle” rules and may increase any short-term capital gains realized by the Fund. The Fund intends to treat any income it may derive from the

FLEX Options as “qualifying income” under the provisions of the Code applicable to RICs. If the income is not qualifying income or the referenced asset is not appropriately treated as the issuer of the FLEX Options, the Fund could lose its own status as a RIC. To maintain its status as a RIC, the Fund must distribute, on an annual basis, at least 90% of its investment company taxable income for each taxable year. In addition, to avoid a non-deductible excise tax, the Fund must distribute on a calendar year basis 98% of its ordinary taxable income and 98.2% of its capital gain net income for each taxable year (plus 100% of any undistributed amounts for prior years). Separately, depending upon the circumstances, sales of its portfolio investments (including FLEX Options) to fund redemptions could cause the Fund to recognize income that the Fund is required to distribute to maintain the Fund’s RIC status and avoid the excise tax. Funding such distributions could require additional sales, which could require more distributions and affect the projected performance of the Fund. Alternatively, if the Fund only makes distributions to maintain its RIC status and becomes subject to the excise tax, that could also affect the projected performance of the Fund. In either case, the assets sold to fund redemptions, distributions or pay the excise tax will not be available to assist the Fund in meeting its target outcome. With respect to the RIC diversification test, identifying the issuer can depend on the terms and conditions of a given investment. There is no published Internal Revenue Service guidance or only limited case law on how to determine the “issuer” of certain derivatives that the Fund will enter into. Based upon language in the legislative history, the Fund intends to treat the issuer of the FLEX Options as the referenced asset, which, assuming the referenced asset qualifies as a RIC, would allow the Fund to qualify for special rules in the RIC diversification requirements. The FLEX Options included in the portfolio are exchange-traded options. Under Section 1256 of the Code, certain types of exchange-traded options are treated as if they were sold (i.e., “marked to market”) at the end of each year. The Fund does not believe that the positions held by the Fund will be subject to Section 1256, which means that the positions will not be marked to market. There is a risk that because the offsetting FLEX Options are being held by a single person that the IRS may take the position that the FLEX Options, viewed together, should be treated as a single instrument for federal tax purposes. The result of such a position would be that the Fund would fail the RIC diversification tests causing the RIC to be taxed as an ordinary corporation, unless certain cure rights based upon reasonable cause may apply. The Fund has obtained an opinion of tax counsel that the FLEX Options should not be collapsed into a single instrument. However, such an opinion is not binding upon the IRS or the courts. In the event that a shareholder purchases Shares of the Fund before a distribution by the Fund, the entire distribution may be taxable to the shareholder even though a portion of the distribution effectively represents a return of the purchase price.

Innovator Emerging Markets 10 Buffer ETF - Quarterly | Valuation Risk [Member]  
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Valuation Risk.    During periods of reduced market liquidity or in the absence of readily available market quotations for the holdings of the Fund, the valuation of the Fund’s FLEX Options will become more difficult. In market environments where there is reduced availability of reliable objective pricing data, the judgment of the Fund’s investment adviser in determining the fair value of the security may play a greater role. While such determinations may be made in good faith, it may nevertheless be more difficult for the Fund to accurately assign a daily value.

Innovator Hedged Nasdaq-100 ETF | Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] You could lose money by investing in the Fund.
Innovator Hedged Nasdaq-100 ETF | Risk Not Insured Depository Institution [Member]  
Prospectus [Line Items]  
Risk [Text Block] An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency.
Innovator Hedged Nasdaq-100 ETF | Risk Nondiversified Status [Member]  
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Non-Diversification Risk.    The Fund is classified as a “non-diversified company” under the 1940 Act. As a result, the Fund is only limited as to the percentage of its assets which may be invested in the securities of any one issuer by the diversification requirements imposed by the Internal Revenue Code of 1986, as amended (the “Code”). The Fund may invest a relatively high percentage of its assets in a limited number of issuers. As a result, the Fund may be more susceptible to a single adverse economic or regulatory occurrence affecting one or more of these issuers, experience increased volatility and be highly invested in certain issuers.

Innovator Hedged Nasdaq-100 ETF | Investment Strategy Risk [Member]  
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Investment Strategy Risk.    The Fund’s investment strategy subjects it to certain unique risks, which are detailed below.

Hedging Strategy Risk.    The Fund seeks to provide risk-managed investment exposure to the Nasdaq-100 through its hedging strategy. In doing so, there is no guarantee that the Fund will be successful in implementing its strategy to provide hedged market exposure. The Fund does not provide principal protection or non-principal protection, and an investor may experience significant losses on its investment, including the loss of its entire investment. An investment in the Fund is only appropriate for shareholders willing to bear those losses and understand that the operation of the sought-after hedged downside protection is not guaranteed. In a market environment where the Nasdaq-100 is generally appreciating, the Fund may underperform the Nasdaq-100 and/or similarly situated funds. In order to provide the sought-after protection against decreases in the Nasdaq-100, the Fund sells call option contracts that reference the Underlying ETF, which will negatively impact the Fund’s performance in a market environment where the Nasdaq-100 appreciates. The Fund’s hedging strategy may not be effectively implemented due to a potential disconnect between the construction of the Nasdaq-100 Portfolio and that of the Options Portfolio. The Nasdaq-100

Portfolio consists of securities that seek investment returns that are substantially similar to the Nasdaq-100 through a representative sampling strategy. In contrast, the reference asset of the Options Portfolio, the Underlying ETF, seeks to track the investment results, before fees and expenses, of the Nasdaq-100. To the extent the returns of the Nasdaq-100 Portfolio deviate from the Underlying ETF’s performance, the Fund may not receive the full benefit of the Fund’s sought-after hedging strategy.

The sought-after hedging strategy is only operative against Underlying ETF losses of between 5% and 15% for the Options Portfolio period. However, there is no guarantee that the Fund will be successful in its attempt to provide hedged downside protection. Investors will experience all losses on the first 5% of losses on a one-to-one basis and all subsequent losses if the Underlying ETF’s share price decreases by more than 15%. The sought-after downside hedged protection is provided prior to taking into account the Fund’s annual management fee of 0.79%, transaction fees and any extraordinary expenses incurred by the Fund. These fees will have the effect of lowering the sought-after hedged downside protection for investors. The Fund’s strategy seeks to provide this hedged downside protection if Shares are held at the time at which the Fund enters into the FLEX Options and held until those FLEX Options expire at the end of the Options Portfolio period. In the event an investor purchases Shares after the FLEX Options were entered into or sells Shares prior to the expiration of the FLEX Options, the downside protection that the Fund seeks to provide may not be available. Because the value of the FLEX Options depends, in part, on the time remaining until expiration and the hedged downside protection is designed to be in effect at the end of the Options Package period, it is possible that the Fund’s NAV may decrease during the Options Package period before the hedged downside protection is fully implemented. If a shareholder were to sell at this time, they could recognize losses on their investment.

Management Risk.    The Fund is subject to management risk because it is an actively managed portfolio. The Sub-Adviser will apply investment techniques and risk analyses in making investment decisions for the Fund, but there can be no guarantee that the Fund will meet its investment objective. The Sub-Adviser’s evaluations and assumptions regarding investments, interest rates, inflation, and other factors may not successfully achieve the Fund’s investment objective given actual market conditions.

Information Technology Companies Risk.    The Fund, directly through the Nasdaq-100 Portfolio and indirectly through the Options Portfolio, is concentrated (i.e., holds 25% or more of its total assets) in the information technology sector. Information technology companies face intense competition, both domestically and internationally, which may have an adverse effect on profit margins. Like other technology companies, information technology companies may have limited product lines, markets, financial resources or personnel. The products of information technology companies may face obsolescence due to rapid technological developments, frequent new product introduction, unpredictable changes in growth rates and competition for the services of qualified personnel. Companies in the information technology sector are heavily dependent on patent and intellectual property rights. The loss or impairment of these rights may adversely affect the profitability of these companies. Information technology companies are facing increased government and regulatory scrutiny and may be subject to adverse government or regulatory action.

Large Capitalization Companies Risk.    The Fund, directly through the Nasdaq-100 Portfolio and indirectly through the Options Portfolio, has significant exposure to large capitalization companies. Large capitalization companies may grow at a slower rate and be less able to adapt to changing market conditions than smaller capitalization companies. Thus, the return on investment in securities of large capitalization companies may be less than the return on investment in securities of small and/or mid capitalization companies. The performance of large capitalization companies also tends to trail the overall market during different market cycles.

Equity Securities Risk.    The Fund has exposure to the equity securities markets because it holds equity securities directly in the Nasdaq-100 Portfolio and has exposure to equity securities indirectly through the Options Portfolio. Equity securities, which include common stocks, may decline in value because of declines in the price of a particular holding or the broad stock market. Such declines may relate directly to the issuer of a security or broader economic or market events, including changes in interest rates. Common stock prices may be particularly sensitive to rising interest rates, as the cost of capital rises and borrowing costs increase and may change significantly due to changes in investors’ perceptions of the financial condition of an issuer or the general condition of the relevant equity market. The value of Shares will fluctuate with changes in the value of the securities in the Nasdaq-100 Portfolio, subject to the Fund’s hedging strategy.

Upside Participation Risk.    There can be no guarantee that the Fund will be able to produce upside returns that correlate to increases of the Nasdsaq-100 over time. The operation of the Options Portfolio will limit the Fund’s upside exposure to increases in the Nasdaq-100. Because the Fund utilizes a representative sampling investment strategy in the implementation of the Nasdaq-100 Portfolio, the Fund will weight securities differently than the Nasdaq-100, which may cause the Fund to underperform or overperform the Nasdaq-100 based on those different weightings. Additionally, the Fund’s sold call option contracts effectively sell potential upside of the Nasdaq-100 in return for a premium received, which could have a negative impact on the Fund’s performance. In a market environment where the Nasdaq-100 appreciates beyond the strike price of the sold call option contracts, the Fund could underperform.

Concentration Risk.    Through the Nasdaq-100 Portfolio and its usage of FLEX Options, the Fund will concentrate in the securities of a particular industry or group of industries to the same extent as the Nasdaq-100® Index. To the extent the Fund has significant exposure in a single asset class or the securities of issuers within the same country, state, region, industry or sector, an adverse economic, business or political development may affect the value of the Funds investments more than if the Fund were more broadly diversified. A significant exposure makes the Fund more susceptible to any single occurrence and may subject the Fund to greater market risk than a fund that is more broadly diversified.

Market Underperformance Risk.    The Fund’s investment strategy may cause the Fund to underperform the Nasdaq-100 and/or similarly situated growth funds. The underperformance may be a result of management risk or the implementation of the Fund’s investment strategy, including, but not limited to, differing weights of the equity securities in the Nasdaq-100 Portfolio versus that of the Nasdaq-100 and the impact of the Fund’s sold call options in appreciating market environments.

Security Issuer Risk.    Issuer specific attributes may cause a security held by the Fund to be more volatile than the market generally. The value of an individual security or particular type of security may be more volatile than the market as a whole and may perform differently from the value of the market as a whole.

Innovator Hedged Nasdaq-100 ETF | Derivatives Risk [Member]  
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Derivatives Risk.    To employ the Fund’s investment strategy, the Fund utilizes derivative instruments. The use of derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities and other traditional investments. These risks include: (i) the risk that the counterparty to a derivative transaction may not fulfill its contractual obligations; (ii) risk of mispricing or improper valuation; and (iii) the risk that changes in the value of the derivative may not correlate perfectly with the underlying asset. Derivative prices are highly volatile and may fluctuate substantially during a short period of time. Such prices are influenced by numerous factors that affect the markets, including, but not limited to: changing supply and demand relationships; government programs and policies; national and international political and economic events, changes in interest rates, inflation and deflation and changes in supply and demand relationships. Trading derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities. Derivative contracts ordinarily have leverage inherent in their terms, which can magnify potential for gain or loss and, therefore, amplify the effects of market volatility on share price. In addition to the foregoing, the Fund is subject to the following risks associated with its use of derivative instruments:

Clearing Member Default Risk.    Transactions in some types of derivatives, including the Fund’s usage of exchange-listed option contracts, are required to be centrally cleared (“cleared derivatives”). In a transaction involving cleared derivatives, the Fund’s counterparty is a clearing house, such as the OCC, rather than a bank or broker. Since the Fund is not a member of clearing houses and only members of a clearing house (“clearing members”) can participate directly in the clearing house, the Fund will hold cleared derivatives through accounts at clearing members. In cleared derivatives positions, the Fund will make payments (including margin payments) to and receive payments from a clearing house through its accounts at clearing members. Customer funds held at a clearing organization in connection with any options contracts are held in a commingled omnibus account and are not identified to the name of the clearing member’s individual customers. As a result, assets deposited by the Fund with any clearing member as margin for may, in certain circumstances, be used to satisfy losses of other clients of the Fund’s clearing member. In addition, although clearing members guarantee performance of their clients’ obligations to the clearing house, there is a risk that the assets of the Fund might not be fully protected in the event of the clearing member’s bankruptcy, as the Fund would be limited to recovering only a pro rata share of all available funds segregated on behalf of the clearing member’s customers for the relevant account class.

Correlation Risk.    The put option contracts held by the Fund, which provide the sought-after hedged downside protection, will be exercisable at the strike price only on their expiration date. Prior to the expiration date, the value of the option contracts will be determined based upon market quotations or using other recognized pricing methods. The value of the option contracts prior to the expiration date may vary because of related factors other than the value

of the underlying reference assets of the option contracts. Factors that may influence the value of the option contracts include interest rate changes and implied volatility levels of underlying reference assets of the option contracts, among others.

Counterparty Risk.    The Fund invests in option contracts, which subjects it to counterparty risk. Counterparty risk is the risk an issuer, guarantor or counterparty of a security in the Fund is unable or unwilling to meet its obligation on the security. Counterparty risk may arise because of the counterparty’s financial condition, market activities, or for other reasons. In the event that the counterparty becomes insolvent or is otherwise unable to meet its settlement obligations, the Fund could suffer significant losses. The OCC acts as guarantor and central counterparty with respect to FLEX Options. In the event an OCC clearing member that is a counterparty of the Fund were to become insolvent, the Fund may have some or all of its FLEX Options closed without its consent or may experience delays or other difficulties in attempting to close or exercise its affected FLEX Options positions, both of which would impair the Fund’s ability to implement its hedging strategy. The OCC’s rules and procedures are designed to facilitate the prompt settlement of options transactions and exercises, including for clearing member insolvencies. However, there is the risk that the OCC and its backup system will fail if clearing member insolvencies are substantial or widespread. In the unlikely event that the OCC becomes insolvent or is otherwise unable to meet its settlement obligations, the Fund could suffer significant losses.

FLEX Options Risk.    The Fund will utilize FLEX Options issued and guaranteed for settlement by the OCC. The Fund bears the risk that the OCC will be unable or unwilling to perform its obligations under the FLEX Options contracts. In the unlikely event that the OCC becomes insolvent or is otherwise unable to meet its settlement obligations, the Fund could suffer significant losses. Additionally, FLEX Options may be less liquid than certain other securities, such as standardized options. In less liquid markets for the FLEX Options, the Fund may have difficulty closing out certain FLEX Options positions at desired times and prices. In connection with the creation and redemption of Shares, to the extent market participants are not willing or able to enter into FLEX Option transactions with the Fund at prices that reflect the market price of the Shares, the Fund’s NAV and, in turn the share price of the Fund, could be negatively impacted.

The Fund may experience substantial downside from specific FLEX Option positions and certain FLEX Option positions may expire worthless. The FLEX Options held by the Fund are exercisable at the strike price on their expiration date. As a FLEX Option approaches its expiration date, its value typically increasingly moves with the value of the Underlying ETF. However, prior to such date, the value of the FLEX Options does not increase or decrease at the same rate as the Underlying ETF’s share price on a day-to-day basis (although they generally move in the same direction). The value of the FLEX Options held by the Fund will be determined based on market quotations or other recognized pricing methods. The value of the underlying FLEX Options will be affected by, among others, changes in the Underlying ETF’s share price, changes in interest rates, changes in the actual and implied volatility of the Underlying ETF and the remaining time to until the FLEX Options expire.

Option Contracts Risk.    The use of option contracts involves investment strategies and risks different from those associated with ordinary portfolio securities transactions and depends on the ability of the Sub-Adviser’s ability to effectively implement the Fund’s strategy. The prices of option contracts are volatile and are influenced by, among other things, actual and anticipated changes in the value of the underlying instrument, changes in interest rates or currency exchange rates, including the anticipated volatility, which are affected by fiscal and monetary policies and by national and international political, changes in the actual or implied volatility or the reference asset, the time remaining until the expiration of the option contract and economic events. There may at times be an imperfect correlation between the movement in values option contracts and the reference asset, and there may at times not be a liquid secondary market for certain option contracts. The effective use of option contracts also depends on the Fund’s ability to terminate its option contracts at times deemed desirable to do so. There is no assurance that the Fund will be able to effect closing transactions at any particular time or at an advantageous price. In addition, the value of the options contracts utilized by the Fund may not increase or decrease at the same rate as the reference asset on a day-to-day basis (although they generally move in the same direction). However, as an option contract approaches its expiration date, its value typically increasingly moves with the value of the reference asset. The Fund has taken the necessary steps to comply with the requirements of Rule 18f-4 under the 1940 Act (“Rule 18f-4”) in its usage of options. The Fund has adopted and implements a derivatives risk management program that contains policies and procedures reasonably designed to manage the Fund’s derivatives risks, has appointed a derivatives risk manager who is responsible for administrating the derivatives risk management program, complies with outer limitations on risks relating to its derivatives transactions and carries out enhanced reporting to the Board, the SEC and the public regarding its derivatives activities. To the extent the Fund is noncompliant with Rule 18f-4, the Fund may be required to adjust its investment portfolio which may, in turn, negatively impact the Fund’s ability to deliver the sought-after hedging strategy.

The Fund’s option contracts are uncovered, meaning the Fund does not directly own all of the securities underlying the option contracts. Rather, the Fund owns a representative sampling of securities of the Nasdaq-100 that are meant to have substantially the same investment exposure as the sold call options on the Underlying ETF. There are risks associated with uncovered option writing which expose the Fund to potentially significant loss. The Fund, as the seller of uncovered options, bears a risk of substantial and potentially unlimited loss for sold call options if the value of the underlying security increases above the strike price and the Fund is unable to convert its holdings from the Nasdaq-100 Portfolio into the Underlying ETF option at a price that is at the strike price.

Innovator Hedged Nasdaq-100 ETF | Underlying ETF Risk [Member]  
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Underlying ETF Risk.    Because the value of the FLEX Options held by the Fund are based on the value of the Underlying ETF, the Fund’s investment performance largely depends on the investment performance and associated risks of the Underlying ETF. The Underlying ETF is subject to many of the same structural risks as the Fund that are described in more detail herein (see “Risks Associated with ETFs” herein). However, the risks of investing in an ETF also include the risks associated with the underlying investments held by the ETF. Therefore, the Fund may be subject to

the same risks that are described herein as a result of its exposure to the Underlying ETF through its usage of FLEX Options, such as Equity Securities Risk, Large Capitalization Companies Risk and Information Technology Companies Risk.

Innovator Hedged Nasdaq-100 ETF | Cyber Security Risk [Member]  
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Cyber Security Risk.    As the use of Internet technology has become more prevalent in the course of business, the investment industry has become more susceptible to potential operational risks through breaches in cyber security. A breach in cyber security refers to both intentional and unintentional events that may cause the Fund to lose proprietary information, suffer data corruption or lose operational capacity. Such events could cause the Fund to incur regulatory penalties, reputational damage, additional compliance costs associated with corrective measures and/or financial loss. Cyber security breaches may involve unauthorized access to the Fund’s digital information systems through “hacking” or malicious software coding, but may also result from outside attacks such as denial-of-service attacks through efforts to make network services unavailable to intended users. In addition, cyber security breaches of the Fund’s third-party service providers, such as its administrator, transfer agent, custodian, or issuers in which the Fund invests, can also subject the Fund to many of the same risks associated with direct cyber security breaches. The Fund has established risk management systems designed to reduce the risks associated with cyber security. However, there is no guarantee that such efforts will succeed, especially because the Fund does not directly control the cyber security systems of issuers or third-party service providers.

Innovator Hedged Nasdaq-100 ETF | Liquidity Risk [Member]  
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Liquidity Risk.    The Fund’s investments are subject to liquidity risk, which exists when an investment is or becomes difficult or impossible to purchase or sell at an advantageous time and price. Liquidity risk may be the result of, among other things, market turmoil, the reduced number and capacity of traditional market participants, or the lack of an active trading market. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, new legislation or regulatory changes inside or outside the U.S. Liquid investments may become less liquid after being purchased by the Fund, particularly during periods of market stress. In addition, if a transaction is particularly large or if the relevant market is or becomes illiquid, it may not be possible to initiate a transaction or liquidate a position, which may cause the Fund to suffer significant losses and difficulties in meeting redemptions. If a number of securities held by the Fund stop trading, it may have a cascading effect and cause the Fund to halt trading. Volatility in market prices will increase the risk of the Fund being subject to a trading halt. In the event that trading in the underlying options contracts is limited or absent, the value of the Fund’s options contracts may decrease. There is no guarantee that a liquid secondary trading market will exist for the options contracts. The trading in options contracts may be less deep and liquid than the market for certain other securities. In a less liquid market for the options contracts, terminating the options contracts may require the payment of a premium or acceptance of a discounted price and may take longer to complete. In a less liquid market for the options contracts, the liquidation of a large number of options may more significantly impact the price. A less liquid trading market may adversely impact the value of the options contracts and the value of your investment.

Innovator Hedged Nasdaq-100 ETF | Market Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Market Risk.    The Fund could lose money over short periods due to short-term market movements and over longer periods during more prolonged market downturns. Assets may decline in value due to factors affecting financial markets generally or particular asset classes or industries represented in the markets. The value of assets may also decline due to general market conditions, economic trends or events that are not specifically related to the issuer of the security or other asset, or due to factors that affect a particular issuer or issuers, country, group of countries, region, market, industry, group of industries, sector or asset class. During a general market downturn, multiple asset classes may be negatively affected. Changes in market conditions and interest rates will not have the same impact on all types of securities. The value of Shares may also decline as a result of market conditions. Factors such as inflation, changes in interest rates, changes in regulatory requirements, bank failures, political climate deterioration or developments, armed conflicts, natural disasters or future health crises, may negatively impact market conditions, and cause a decrease in the value of Shares. Other unexpected political, regulatory and diplomatic events within the U.S. and abroad may affect investor and consumer confidence and may adversely impact financial markets and the broader economy. These events, and any other future events, may adversely affect the prices and liquidity of the Fund’s portfolio investments and could result in disruptions in the trading markets.

Innovator Hedged Nasdaq-100 ETF | Risks Associated with ETFs [Member]  
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Risks Associated with ETFs.    The Fund is an ETF, and therefore, as a result of an ETF’s structure, is subject to the following risks:

Authorized Participant Concentration Risk.    Only an authorized participant may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that may act as authorized participants on an agency basis (i.e., on behalf of other market participants). To the extent that authorized participants exit the business or are unable to proceed with orders for the issuance or redemption of Creation Units and no other authorized participant is able to step forward to fulfill the order, Shares may be more likely to trade at a premium or discount to NAV and possibly face trading halts and/or delisting, and the bid/ask spread (the difference between the price that someone is willing to pay for Shares at a specific point in time versus the price at which someone is willing to sell) on Shares may widen.

Cash Transactions Risk.    The Fund may effectuate all or a portion of its creations and redemptions for cash, rather than in-kind securities. As a result, an investment in the Fund may be less tax-efficient than an investment in an ETF that effects its creations and redemptions only in-kind. ETFs are able to make in-kind redemptions to avoid being taxed on gains on the distributed portfolio securities at the fund level. A Fund that effects redemptions for cash may be required to sell portfolio securities in order to obtain the cash needed to distribute redemption proceeds. Any recognized gain on these sales by the Fund will generally cause

the Fund to recognize a gain it might not otherwise have recognized, or to recognize such gain sooner than would otherwise be required if it were to distribute portfolio securities only in-kind. The Fund intends to distribute these gains to shareholders to avoid being taxed on this gain at the fund level and otherwise comply with special tax rules that apply to it. This strategy may cause shareholders to be subject to tax on gains they would not otherwise be subject to, or at an earlier date than if they had made an investment in another ETF. Moreover, cash transactions may have to be carried out over several days if the securities market is relatively illiquid and may involve considerable brokerage fees and taxes. These brokerage fees and taxes, which will be higher than if the Fund sold and redeemed its shares principally in-kind, will be passed on to those purchasing and redeeming Creation Units in the form of creation and redemption transaction fees. In addition, these factors may result in wider spreads between the bid and the offered prices of Fund Shares than for ETFs that distribute portfolio securities in-kind. The Fund’s use of cash for creations and redemptions could also result in dilution to the Fund and increases transaction costs, which could negatively impact the Fund’s ability to achieve its investment objective.

Market Maker Risk.    If the Fund has lower average daily trading volumes, it may rely on a small number of third-party market makers to provide a market for the purchase and sale of Shares. Any trading halt or other problem relating to the trading activity of these market makers could result in a dramatic change in the spread between the Fund’s net asset value (“NAV”) and the price at which the Shares are trading on the Exchange, which could result in a decrease in value of the Shares. In addition, decisions by market makers or authorized participants to reduce their role or step away from these activities in times of market stress could inhibit the effectiveness of the arbitrage process in maintaining the relationship between the underlying values of the Fund’s portfolio securities and the Fund’s market price. This reduced effectiveness could result in Shares trading at a discount to NAV and also in greater than normal intra-day bid-ask spreads for Shares.

Operational Risk.    The Fund is exposed to operational risks arising from a number of factors, including, but not limited to, human error in the implementation of the Fund’s investment strategy, processing and communication errors, errors of the Fund’s service providers, counterparties or other third-parties, failed or inadequate processes and technology or systems failures. The Fund, the Adviser and the Sub-Adviser seek to reduce these operational risks through controls and procedures. However, these measures do not address every possible risk and may be inadequate to address these risks.

Premium/Discount Risk.    Shares trade on the Exchange at market prices rather than their NAV. The market price of Shares generally corresponds to movements in the Fund’s NAV as well as the relative supply and demand for Shares on the Exchange. The market price may be at, above (a premium) or below (a discount) the Fund’s NAV. Differences in market prices of Shares and the NAV per Share may be due, in large part, to the fact that supply and demand forces at work in the secondary trading market for Shares will be closely related to, but not identical to, the same forces influencing the prices of the Fund’s holdings trading individually or in the aggregate at any point in time. These differences can be especially pronounced during times of market volatility or stress. During these periods, the demand for Shares may decrease considerably and cause the market price of Shares to deviate, and in some cases deviate significantly, from the Fund’s NAV and the bid/ask spread on Shares may widen.

Trading Issues Risk.    Although Shares are listed for trading on the Exchange, there can be no assurance that an active trading market for such Shares will develop or be maintained. Trading in Shares on the Exchange may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in Shares inadvisable. In addition, trading in Shares on the Exchange is subject to trading halts caused by extraordinary market volatility pursuant to the Exchange “circuit breaker” rules. Market makers are under no obligation to make a market in the Shares, and authorized participants are not obligated to submit purchase or redemption orders for Creation Units. There can be no assurance that the requirements of the Exchange necessary to maintain the listing of the Fund will continue to be met or will remain unchanged. Initially, due to the small asset size of the Fund, it may have difficulty maintaining its listings on the Exchange.

Innovator Hedged Nasdaq-100 ETF | Tax Risk [Member]  
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Tax Risk.    The Fund has elected to be treated and intends to qualify each year as a regulated investment company (“RIC”) under Subchapter M of the Code, and accordingly the Fund must satisfy certain income, asset diversification and distribution requirements each year. Among other requirements, the Fund must derive at least 90% of its gross income each taxable year from certain qualifying sources of income and the Fund’s assets must be diversified so that at least 50% of the value of the Fund’s total assets is represented by cash and cash items, U.S. government securities, securities of other RICs, and other securities, subject to certain other limitations. The Fund will also need to manage its exposure to derivatives counterparties for purposes of satisfying the diversification test. Additionally, the federal income tax treatment of certain aspects of the proposed operations of the Fund are not entirely clear. This includes the tax aspects of the Fund’s options strategy, its hedging strategy, the possible application of the “straddle” rules, and various loss limitation provisions of the Code. See “Treatment of the Fund’s Option Contracts” below for additional information relating to the application of the “straddle” rules. If, in any year, the Fund fails to qualify as a RIC under the applicable tax laws, the Fund would be taxed as an ordinary corporation and distributions to its shareholders would not be deductible by the Fund in computing its taxable income, which would adversely affect the Fund’s performance. Certain option contracts held by the Fund are likely to be “Section 1256 contracts” under Section 1256 of the Code, allowing the Fund to recognize a combination of long and short term gain from such contracts but requiring the Fund to recognize gain or loss as if the Section 1256 contracts were sold. Certain option contracts on an ETF may not qualify as Section 1256 contracts, and disposition of such options will likely result in short-term capital gains or losses. The Fund intends to treat any income it may derive from the options contracts as “qualifying income” under the provisions of the Code applicable to RICs. In addition, based upon language in the legislative history, the Fund intends to treat the issuer of the options contracts as the referenced asset, which, assuming the referenced asset qualifies as a RIC, would allow the Fund to qualify for special rules in the RIC diversification requirements. If the income is not qualifying income or the issuer of the options contract is not appropriately the referenced asset, the Fund could lose its own status as a RIC. The FLEX Options included in the portfolio are exchange-traded options. Under Section 1256 of the Code, certain types of exchange-traded options are treated as if they were sold (i.e., “marked to market”) at the end of each year. The Fund does not believe that the positions held by the Fund will be subject to Section 1256, which means that the positions will not be marked to market. In the event that a shareholder purchases Shares of the Fund shortly before a distribution by the Fund, the entire distribution may be taxable to the shareholder even though a portion of the distribution effectively represents a return of the purchase price.

Innovator Hedged Nasdaq-100 ETF | Valuation Risk [Member]  
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Valuation Risk.    During periods of reduced market liquidity or in the absence of readily available market quotations for the holdings of the Fund, the valuation of the Fund’s investments may become more difficult. In market environments where there is reduced availability of reliable objective pricing data, the judgment of the Fund’s investment adviser in determining the fair value of the security may play a greater role. While such determinations may be made in good faith, it may nevertheless be more difficult to accurately assign a daily value.

Innovator International Developed 10 Buffer ETF - Quarterly | Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] You could lose money by investing in the Fund.
Innovator International Developed 10 Buffer ETF - Quarterly | Risk Not Insured Depository Institution [Member]  
Prospectus [Line Items]  
Risk [Text Block] An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency.
Innovator International Developed 10 Buffer ETF - Quarterly | Risk Nondiversified Status [Member]  
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Non-Diversification Risk.    The Fund is classified as a “non-diversified company” under the 1940 Act. As a result, the Fund is only limited as to the percentage of its assets which may be invested in the securities of any one issuer by the diversification requirements imposed by the Internal Revenue Code of 1986, as amended (the “Code”). The Fund may invest a relatively high percentage of its assets in a limited number of issuers. As a result, the Fund may be more susceptible to a single adverse economic or regulatory occurrence affecting one or more of these issuers, experience increased volatility and be highly invested in certain issuers.

Innovator International Developed 10 Buffer ETF - Quarterly | Defined Outcome Strategy Risk [Member]  
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Defined Outcome Strategy Risk.    The Fund, in employing a “defined outcome strategy” is subject to certain unique risks, which are detailed below.

Buffered Loss Risk.    There can be no guarantee that the Fund will be successful in its strategy to provide buffer protection against Underlying ETF losses if the Underlying ETF’s share price decreases by 10% or less over the duration of the Outcome Period. A shareholder may lose their entire investment. The Fund’s strategy seeks to provide the sought-after protection of the Buffer if Shares are held at the time at which the Fund enters into the FLEX Options and held until those FLEX Options expire at the end of the Outcome Period. In the event an investor purchases Shares after the FLEX Options were entered into or sells Shares prior to the expiration of the FLEX Options, the Buffer that the Fund seeks to provide may not be available. The Fund does not provide principal protection or non-principal protection, and an investor may experience significant losses on its investment, including the loss of its entire investment. An investor that holds Shares through multiple Outcome Periods will be unable to recapture losses from prior Outcome Periods because at the end of each Outcome Period, a new Buffer will be established based on the then-current price of the Underlying ETF and any losses experienced below the prior Buffer will be locked-in. Moreover, the quarterly imposition of a new Cap on future gains may make it difficult to recoup any losses from the prior Outcome Periods such that, over multiple Outcome Periods, the Fund may have losses that exceed those of the Underlying ETF. To the extent the Fund invests directly in the Underlying ETF, the Buffer will be provided after the consideration of dividends received, whereby the Fund has assumed an anticipated dividend rate, which is on the historical dividend rate of the Underlying ETF. This assumed dividend rate may be less than dividends actually received by the Fund for the Outcome Period, in which case shareholders may not receive the sought-after downside protection of the Buffer.

Cap Change Risk.    A new Cap is established at the beginning of each Outcome Period and is dependent on prevailing market conditions at the time the Cap is established. As such, the Cap may rise or fall from one Outcome Period to the next and is unlikely to remain the same for consecutive Outcome Periods.

Capped Upside Return Risk.    The Fund’s strategy seeks to provide returns that are subject to the Cap. In the event that the Underlying ETF experiences gains in excess of the Cap for the Outcome Period, the Fund will not participate in, and will underperform the Underlying ETF to the extent of, those gains beyond the Cap. The Fund’s strategy seeks to participate in the upside of the entirety of the Underlying ETF gains (subject to the Cap), if Shares are held at the time at which the Fund enters into the FLEX Options and held until those FLEX Options expire at the end of the Outcome Period. In the event an investor purchases Shares after the FLEX Options were entered into, there may be little or no ability for that investor to experience an investment gain on their Shares. Due to the size of the Buffer over each quarterly Outcome Period, the Fund expects its Cap to be lower relative to other “defined outcome products” with an annual outcome period and/or a lower buffer. Further, because the FLEX Options are designed to produce the sought-after returns on the last day of the Outcome Period, if an investor sells Shares prior to the expiration date of the FLEX Options such investor may sell at a point where the Fund’s performance does not match the performance of the Underlying ETF over the Outcome Period, and therefore may sell at a point where the Fund has underperformed the Underlying ETF, even if such gains do not exceed the Cap. The Fund seeks to actively

manage its portfolio such that any transaction fees incurred by the Fund in connection with the management of the Fund’s assets will not impact the Fund’s performance in seeking to provide upside exposure to the Underlying ETF or the Fund’s ability to experience returns that match the Cap, to the extent the returns of the Underlying ETF are equal to or greater than the Cap. However, it is not guaranteed that the Fund will be able to successfully manage its assets to contemplate the transaction fees incurred by the Fund to achieve the Outcomes sought by the Fund. An investor that holds Shares through multiple Outcome Periods may fail to experience gains comparable to those of the Underlying ETF over time because at the end of each Outcome Period, a new Cap will be established based on the then-current price of the Underlying ETF and any gains above the prior Cap will be forfeited. To the extent the Fund invests directly in the Underlying ETF, the Cap will be provided after the consideration of dividends received, whereby the Fund has assumed an anticipated dividend rate, which is on the historical dividend rate of the Underlying ETF. This assumed dividend rate may be less than dividends actually received by the Fund for the Outcome Period, in which case the Cap will be less than disclosed herein.

Investment Objective Risk.    Certain circumstances under which the Fund might not achieve its objective include, but are not limited, to (i) if the Fund disposes of FLEX Options, (ii) if the Fund is unable to maintain the proportional relationship based on the number of FLEX Options in the Fund’s portfolio, (iii) a significant accrual of Fund expenses in connection with effecting the Fund’s principal investment strategy or (iv) adverse tax law changes or interpretations affecting the treatment of FLEX Options. If these factors were to occur, the Fund may be unable to achieve its investment objective, and investors may not receive the Outcomes described herein. Finally, the Fund is also subject to management risk as an actively-managed fund, which may cause it not to achieve its investment objective.

Management Risk.    Defined outcome strategies are actively-managed and accordingly, the Fund is subject to management risk. The Sub-Adviser applies investment techniques and risk analyses in making investment decisions for the Fund, subject to the oversight of the Adviser, but there can be no guarantee that the Sub-Adviser will properly implement the Fund’s investment strategy and therefore the Fund may not achieve its investment objective or its sought-after Outcomes, or perform as well as similarly situated funds.

Outcome Period Risk.    The Fund’s investment strategy is designed to deliver returns that match those of the Underlying ETF if Shares are held from the time the Fund enters into the FLEX Options and held until those FLEX Options expire at the end of the Outcome Period. In the event an investor purchases Shares after the FLEX Options were entered into or sells Shares prior to the expiration of the FLEX Options, the returns realized by the investor will not match those that the Fund seeks to provide. An investor that holds Shares through multiple Outcome Periods may fail to experience gains comparable to those of the Underlying ETF over time because at the end of each Outcome Period, a new Cap will be established based on the then-current price of the Underlying ETF and any gains of the Underlying ETF above the prior Cap will be forfeited. In addition, because the Fund is designed to achieve Outcomes that change for each three-month Outcome Period, the Outcomes that are achieved by the Fund for a three-month Outcome Period will be different than the Outcomes achieved by the Fund over multiple Outcome Periods, or on an annualized basis. Similarly, investors holding Shares

over multiple Outcome Periods will experience different investment results than holding a fund that has a longer Outcome Period (e.g., one year) and any losses for such holders could exceed the performance for a fund with a longer Outcome Period.

Upside Participation Risk.    There can be no guarantee that the Fund will be successful in its strategy to provide shareholders with returns that match the increases in the price of the Underlying ETF over the Outcome Period, subject to a maximum return imposed by the Cap. In the event an investor purchases Shares after the FLEX Options were entered into or does not stay invested in the Fund for the entirety of the Outcome Period, the returns realized by such investor may not match those that the Fund seeks to achieve. The Fund is subject to a Cap which may be lower relative to other “defined outcome products” and, as a result, any positive investment returns delivered by the Fund may be lower in comparison to such products and to that of the Underlying ETF.

Innovator International Developed 10 Buffer ETF - Quarterly | Derivatives Risk [Member]  
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Derivatives Risk.    To employ the Fund’s defined outcome strategy, the Fund utilizes FLEX Options, which are a type of derivative instrument. The use of derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities and other traditional investments. These risks include: (i) the risk that the counterparty to a derivative transaction may not fulfill its contractual obligations; (ii) risk of mispricing or improper valuation; and (iii) the risk that changes in the value of the derivative may not correlate perfectly with the underlying asset. Derivative prices are highly volatile and may fluctuate substantially during a short period of time. Such prices are influenced by numerous factors that affect the markets, including, but not limited to: (i) changing supply and demand relationships; (ii) government programs and policies; (iii) national and international political and economic events; (iv) changes in interest rates; (v) inflation and deflation; and (vi) changes in supply and demand relationships. Trading derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities. Derivative contracts ordinarily have leverage inherent in their terms, which can magnify potential for gain or loss and, therefore, amplify the effects of market volatility on share price. The Fund has taken the necessary steps to comply with the requirements of Rule 18f-4 under the 1940 Act (“Rule 18f-4”) in its usage of FLEX Options. The Fund has adopted and implements a derivatives risk management program that contains policies and procedures reasonably designed to manage the Fund’s derivatives risks, has appointed a derivatives risk manager who is responsible for administrating the derivatives risk management program, complies with outer limitations on risks relating to its derivatives transactions and carries out enhanced reporting to the Board, the SEC and the public regarding its derivatives activities. To the extent the Fund is noncompliant with Rule 18f-4, the Fund may be required to adjust its investment portfolio which may, in turn, negatively impact the Fund’s ability to deliver the sought-after Outcomes. In addition to the foregoing, the Fund is subject to the following risks associated with its use of derivative instruments:

Clearing Member Default Risk.    Transactions in some types of derivatives, including FLEX Options, are required to be centrally cleared (“cleared derivatives”). In a transaction involving cleared derivatives, the Fund’s counterparty is a clearing house, such as the OCC, rather than a bank or broker. Since the Fund is not a member of clearing houses and only members of a clearing house (“clearing members”) can participate directly in the clearing house, the Fund will hold cleared derivatives through accounts at clearing members. In cleared derivatives positions, the Fund will make payments (including margin payments) to, and receive payments from, a clearing house through their accounts at clearing members. Customer funds held at

a clearing organization in connection with any option contracts are held in a commingled omnibus account and are not identified to the name of the clearing member’s individual customers. As a result, assets deposited by the Fund with any clearing member as margin for its FLEX Options may, in certain circumstances, be used to satisfy losses of other clients of the Fund’s clearing member. In addition, although clearing members guarantee performance of their clients’ obligations to the clearing house, there is a risk that the assets of the Fund might not be fully protected in the event of the clearing member’s bankruptcy. The Fund is also subject to the risk that a limited number of clearing members are willing to transact on the Fund’s behalf, which heightens the risks associated with a clearing member’s default. If a clearing member defaults the Fund could lose some or all of the benefits of a transaction entered into by the Fund with the clearing member. The loss of a clearing member for the Fund to transact with could result in increased transaction costs and other operational issues that could impede the Fund’s ability to implement its investment strategy. If the Fund cannot find a clearing member to transact with on the Fund’s behalf, the Fund may be unable to effectively implement its investment strategy.

Correlation Risk.    The FLEX Options held by the Fund will be exercisable at the strike price only on their expiration date. As a FLEX Option approaches its expiration date, its value typically will increasingly move with the value of the Underlying ETF. However, the value of the FLEX Options may vary prior to the expiration date because of related factors other than the value of the Underlying ETF. The value of the FLEX Options will be determined based upon market quotations or using other recognized pricing methods. Factors that may influence the value of the FLEX Options include interest rate changes and implied volatility levels of the Underlying ETF, among others. The value of the FLEX Options held by the Fund typically do not increase or decrease at the same level as the Underlying ETF’s share price on a day-to-day basis due to these factors (although they generally move in the same direction). Since the Underlying ETF has the potential to be more volatile than other funds, in the period between the beginning and end of the Outcome Period, it is possible that the degree of non-correlation between the value of the FLEX Options and the value of the Underlying ETF will be higher than if the FLEX Options utilized a less volatile fund as their reference asset.

Counterparty Risk.    Counterparty risk is the risk an issuer, guarantor or counterparty of a security in the Fund is unable or unwilling to meet its obligation on the security. Counterparty risk may arise because of the counterparty’s financial condition, market activities, or for other reasons. The Fund may be unable to recover its investment from the counterparty or may obtain a limited and/or delayed recovery. The OCC acts as guarantor and central counterparty with respect to the FLEX Options. As a result, the ability of the Fund to meet its objective depends on the OCC being able to meet its obligations. In the event an OCC clearing member that is a counterparty of the Fund were to become insolvent, the Fund may have some or all of its FLEX Options closed without its consent or may experience delays or other difficulties in attempting to close or exercise its affected FLEX Options positions, both of which would impair the Fund’s ability to deliver on its investment strategy. The OCC’s rules and procedures are designed to facilitate the prompt settlement of options transactions and exercises, including for clearing member insolvencies. However, there is the risk that the OCC and its backup system will fail if clearing member insolvencies are substantial or widespread. In the unlikely event that the OCC becomes insolvent or is otherwise unable to meet its settlement obligations, the Fund could suffer significant losses.

FLEX Options Risk.    The Fund will utilize FLEX Options issued and guaranteed for settlement by the OCC. The use of option contracts involves investment strategies and risks different from those associated with ordinary portfolio securities transactions. The prices of option contracts are volatile and are influenced by, among other things, actual and anticipated changes in the value of the underlying instrument, changes in interest or currency exchange rates, including the anticipated volatility, which are affected by fiscal and monetary policies and by national and international political, changes in the actual or implied volatility or the reference asset, the time remaining until the expiration of the option contract and economic events. There may at times be an imperfect correlation between the movement in values option contracts and the reference asset, and there may at times not be a liquid secondary market for certain option contracts.

The Fund bears the risk that the OCC will be unable or unwilling to perform its obligations under the FLEX Options contracts. In the unlikely event that the OCC becomes insolvent or is otherwise unable to meet its settlement obligations, the Fund could suffer significant losses. Additionally, FLEX Options may be less liquid than certain other securities, such as standardized options. In less liquid markets for the FLEX Options, the Fund may have difficulty closing out certain FLEX Options positions at desired times and prices. In connection with the creation and redemption of Shares, to the extent market participants are not willing or able to enter into FLEX Option transactions with the Fund at prices that reflect the market price of the Shares, the Fund’s NAV and, in turn the share price of the Fund, could be negatively impacted.

The Fund may experience substantial downside from specific FLEX Option positions and certain FLEX Option positions may expire worthless. The FLEX Options held by the Fund are exercisable at the strike price on their expiration date. As a FLEX Option approaches its expiration date, its value typically increasingly moves with the value of the Underlying ETF. However, prior to such date, the value of the FLEX Options does not increase or decrease at the same rate as the Underlying ETF’s share price on a day-to-day basis (although they generally move in the same direction). The value of the FLEX Options held by the Fund will be determined based on market quotations or other recognized pricing methods. The value of the underlying FLEX Options will be affected by, among others, changes in the Underlying ETF’s share price, changes in interest rates, changes in the actual and implied volatility of the Underlying ETF and the remaining time to until the FLEX Options expire.

Liquidity Risk.    In the event that trading in the underlying FLEX Options is limited or absent, the value of the Fund’s FLEX Options may decrease. There is no guarantee that a liquid secondary trading market will exist for the FLEX Options. The trading in FLEX Options may be less deep and liquid than the market for certain other securities, including certain non-customized option contracts. In a less liquid market for the FLEX Options, terminating the FLEX Options may require the payment of a premium or acceptance of a discounted price and may take longer to complete. Additionally, the liquidation of a large number of FLEX Options may more significantly impact the price in a less liquid market. Further, the Fund requires a sufficient number of participants to facilitate the purchase and sale of options on an exchange to provide liquidity to the Fund for its FLEX Option positions. A less liquid trading market may adversely impact the value of the FLEX Options and the value of your investment.

Innovator International Developed 10 Buffer ETF - Quarterly | Underlying ETF Risk [Member]  
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Underlying ETF Risk.    The Fund’s investment performance largely depends on the investment performance and associated risks of the Underlying ETF. The Underlying ETF is subject to many of the same structural risks as the Fund that are described in more detail herein (see “Risks Associated with ETFs” below). The Adviser expects to waive a portion of its management fee in an amount that equals to any acquired fund fees and expenses the Fund incurs as a result of any direct investment in the Underlying ETF. However, if the Adviser does not waive such expenses in the future, the Fund will bear its proportionate share of the Underlying ETF’s expenses, subjecting Fund shareholders to such expenses. Further, the risks of investing in an ETF also include the risks associated with the underlying investments held by the ETF. As such, the Fund may be subject to the following risks as a result of its exposure to the Underlying ETF (or the components thereof):

Asia Risk.    Many Asian economies have experienced rapid growth and industrialization, and there is no assurance that this growth rate will be maintained. Some Asian economies are highly dependent on trade, and economic conditions in other countries within and outside Asia can impact these economies. Certain of these economies may be adversely affected by trade or policy disputes with its major trade partners. There is also a high concentration of market capitalization and trading volume in a small number of issuers representing a limited number of industries, as well as a high concentration of investors and financial intermediaries. Certain Asian countries have experienced and may in the future experience expropriation and nationalization of assets, confiscatory taxation, currency manipulation, political instability, armed conflict and social instability as a result of religious, ethnic, socio-economic and/or political unrest. In particular, escalated tensions involving North Korea and any outbreak of hostilities involving North Korea could have a severe adverse effect on Asian economies. Governments of certain Asian countries have exercised, and continue to exercise, substantial influence over many aspects of the private sector. In certain cases, the government owns or controls many companies, including the largest in the country. Accordingly, government actions could have a significant effect on the issuers of the Fund’s securities or on economic conditions generally.

Consumer Goods and Services Companies Risk.    Consumer goods and services companies face risks related to changes in consumer preferences and disposable income, commodity prices, government regulation, supply chain disruptions, damage to brand or reputation, economic slowdown and labor shortages, among other things.

Currency Risk.    Changes in currency exchange rates affect the value of investments denominated in a non-U.S. currency. The value of investments held by the Underlying ETF, and therefore the value of the Underlying ETF, could change based on changes in currency exchange rates. The Fund’s NAV could therefore decline based on changes in the value of currencies or if there are delays or limits on repatriation of such currency. Currency exchange rates can be very volatile and can change quickly and unpredictably.

Equity Securities Risk.    Equity securities may decline in value because of declines in the price of a particular holding or the broad stock market. Such declines may relate directly to the issuer of a security or broader economic or market events, including changes in interest rates. The value of shares will fluctuate with changes in the value of the equity securities the Underlying ETF invests in.

Europe Risk.    Political or economic disruptions in European countries, even in countries in which the Fund is not invested, may adversely affect security values and thus the Fund’s holdings. A significant number of countries in Europe are member states in the European Union (the “EU”), and the member states no longer control their own monetary policies by directing independent interest rates for their currencies. In these member states, the authority to direct monetary policies, including money supply and official interest rates for the Euro, is exercised by the European Central Bank. In a 2016 referendum, the United Kingdom elected to withdraw from the EU (commonly referred to as “Brexit”). After years of negotiations between the United Kingdom and the EU, a withdrawal agreement was reached whereby the United Kingdom formally left the EU. As the second largest economy among EU members, the implications of the United Kingdom’s withdrawal are difficult to gauge and cannot be fully known. Its departure may negatively impact the EU and Europe as a whole by causing volatility within the EU, triggering prolonged economic downturns in certain European countries or sparking additional member states to contemplate departing the EU (thereby perpetuating political instability in the region).

Financials Sector Risk.    Financial companies, such as retail and commercial banks, insurance companies and financial services companies, are especially subject to the adverse effects of economic recession, currency exchange rates, extensive government regulation, decreases in the availability of capital, volatile interest rates, portfolio concentrations in geographic markets, industries or products (such as commercial and residential real estate loans) and competition from new entrants and blurred distinctions in their fields of business.

Industrials Sector Risk.    Companies within the industrials sector are affected by supply and demand both for their specific product or service and for industrial sector products and services in general. Government regulation, world events, exchange rates and economic conditions, technological developments and liabilities for environmental damage and general civil liabilities will likewise affect the performance of these companies. Additionally, government spending policies may impact the profitability of the industrials sector since industrials companies, especially aerospace and defense companies, often rely on government demand for their products and services.

Japan Risk.    The Japanese economy may be subject to considerable degrees of economic, political and social instability, which could have a negative impact on Japanese securities. Japan’s economy is characterized by government intervention and protectionism, reliance on oil imports, an unstable financial services sector and relatively high unemployment. Since 2000, Japan has experienced relatively low economic growth, and it may remain low in the future. Its economy is heavily dependent on international trade and has been adversely affected by trade tariffs and competition from emerging economies. As such, economic growth is heavily dependent on continued growth in international trade, relatively low commodities prices, government support of the financial services sector and other government policies. Any changes or trends in these economic factors could have a significant impact on Japan’s markets overall and may negatively affect the Fund’s investments. Japan’s economy and equity market also share a strong correlation with U.S. markets and the Japanese economy may be affected by economic problems in the U.S. Japan’s geography also subjects it to an increased risk of natural disasters, such as earthquakes, volcanic eruptions, typhoons and tsunamis, all of which could negatively impact the Fund’s investments.

Large Capitalization Companies Risk.    Large capitalization companies may grow at a slower rate and be less able to adapt to changing market conditions than smaller capitalization companies. Thus, the return on investment in securities of large capitalization companies may be less than the return on investment in securities of small and/or mid capitalization companies. The performance of large capitalization companies also tends to trail the overall market during different market cycles.

Non-U.S. Securities Risk.    An investment in securities of non-U.S. companies involves risks not associated with domestic issuers. Non-U.S. securities are subject to higher volatility than securities of domestic issuers due to possible adverse political, social or economic developments, restrictions on foreign investment or exchange of securities, lack of liquidity, currency exchange rates, excessive taxation, government seizure of assets, different legal or accounting standards, and less government supervision and regulation of securities exchanges in foreign countries.

Innovator International Developed 10 Buffer ETF - Quarterly | Concentration Risk [Member]  
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Concentration Risk.    Through its exposure to the Underlying ETF, the Fund will concentrate in the securities of a particular industry or group of industries to the same extent as the Underlying ETF. To the extent the Fund has significant exposure in a single asset class or the securities of issuers within the same country, state, region, industry or sector, an adverse economic, business or political development may affect the value of the Fund’s investments more than if the Fund were more broadly diversified. A significant exposure makes the Fund more susceptible to any single occurrence and may subject the Fund to greater market risk than a fund that is more broadly diversified.

Innovator International Developed 10 Buffer ETF - Quarterly | Cyber Security Risk [Member]  
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Cyber Security Risk.    As the use of Internet technology has become more prevalent in the course of business, the investment industry has become more susceptible to potential operational risks through breaches in cyber security. A breach in cyber security refers to both intentional and unintentional events that may cause the Fund to lose proprietary information, suffer data corruption or lose operational capacity. Such events could cause the Fund to incur regulatory penalties, reputational damage, additional compliance costs associated with corrective measures and/or financial loss. Cyber security breaches may involve unauthorized access to the Fund’s digital information systems through “hacking” or malicious software coding, but may also result from outside attacks such as denial-of-service attacks through efforts to make network services unavailable to intended users. In addition, cyber security breaches of the Fund’s third-party service providers, such as its administrator, transfer agent, or custodian can also subject the Fund to many of the same risks associated with direct cyber security breaches. The Fund has established risk management systems designed to reduce the risks associated with cyber security. However, there is no guarantee that such efforts will succeed, especially because the Fund does not directly control the cyber security systems of issuers or third-party service providers.

Innovator International Developed 10 Buffer ETF - Quarterly | Market Risk [Member]  
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Market Risk.    The Fund could lose money over short periods due to short-term market movements and over longer periods during more prolonged market downturns. Assets may decline in value due to factors affecting financial markets generally or particular asset classes or industries represented in the markets. The value of FLEX Options or other assets may also decline due to general market conditions, economic trends or events that are not specifically related to the issuer of the security or other asset, or due to factors that affect a particular issuer or issuers, country, group of countries, region, market, industry, group of industries, sector or asset class. During a

general market downturn, multiple asset classes may be negatively affected. Changes in market conditions and interest rates will not have the same impact on all types of securities. Securities, including the Shares, are subject to market fluctuations and liquidity constraints that may be caused by such factors as economic, political, or regulatory developments, changes in interest rates, and/or perceived trends in securities prices. Shares of the Fund could decline in value or underperform other investments. The value of Shares may also decline as a result of market conditions. Factors such as inflation, changes in interest rates, changes in regulatory requirements, bank failures, political climate deterioration or developments, armed conflicts, natural disasters or future health crises, may negatively impact market conditions, and cause a decrease in the value of Shares. Other unexpected political, regulatory and diplomatic events within the U.S. and abroad may affect investor and consumer confidence and may adversely impact financial markets and the broader economy. These events, and any other future events, may adversely affect the prices and liquidity of the Fund’s portfolio investments and could result in disruptions in the trading markets.

Innovator International Developed 10 Buffer ETF - Quarterly | Risks Associated with ETFs [Member]  
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Risks Associated with ETFs.    The Fund is an ETF, and therefore, as a result of an ETF’s structure, is subject to the following risks:

Authorized Participant Concentration Risk.    Only an authorized participant may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that may act as authorized participants on an agency basis (i.e., on behalf of other market participants). To the extent that authorized participants exit the business or are unable to proceed with orders for the issuance or redemption of Creation Units and no other authorized participant is able to step forward to fulfill the order, Shares may be more likely to trade at a premium or discount to NAV and possibly face trading halts and/or delisting, and the bid/ask spread (the difference between the price that someone is willing to pay for Shares at a specific point in time versus the price at which someone is willing to sell) on Shares may widen.

Cash Transactions Risk.    The Fund may effectuate all or a portion of the issuance and redemption of Creation Units for cash, rather than in-kind securities. As a result, an investment in the Fund may be less tax-efficient than an investment in an ETF that effectuates its Creation Units only on an in-kind basis. ETFs are able to make in-kind redemptions to avoid being taxed on gains on the distributed portfolio securities at the fund level. A fund that effects redemptions for cash may be required to sell portfolio securities in order to obtain the cash needed to distribute redemption proceeds and may be forced to recognize gains. The Fund intends to distribute gains that arise by virtue of the issuance and redemption of Creation Units being effectuated in cash to shareholders to avoid being taxed on this gain at the fund level and otherwise comply with special tax rules that apply to it. This may cause shareholders to be subject to tax on gains they would not otherwise be subject to, or at an earlier date than

if they had made an investment in another ETF. Moreover, cash transactions may have to be carried out over several days if the securities market is relatively illiquid and may involve considerable brokerage fees and taxes. These brokerage fees and taxes, which will be higher than if the Fund sold and redeemed its shares principally in-kind, will be passed on to those purchasing and redeeming Creation Units in the form of creation and redemption transaction fees. The Fund’s use of cash for creations and redemptions could also result in dilution to the Fund and increased transaction costs, which could negatively impact the Fund’s ability to achieve its investment objective.

Market Maker Risk.    If the Fund has lower average daily trading volumes, it may rely on a small number of third-party market makers to provide a market for the purchase and sale of Shares. Any trading halt or other problem relating to the trading activity of these market makers could result in a dramatic change in the spread between the Fund’s NAV and the price at which the Shares are trading on the Exchange, which could result in a decrease in the market price of the Shares. In addition, decisions by market makers or authorized participants to reduce their role or step away from these activities in times of market stress could inhibit the effectiveness of the arbitrage process in maintaining the relationship between the underlying values of the Fund’s portfolio securities and the Fund’s market price. This reduced effectiveness could result in Shares trading at a discount to NAV and in greater than normal intra-day bid-ask spreads for Shares.

Operational Risk.    The Fund is exposed to operational risks arising from a number of factors, including, but not limited to, human error in the calculation of the Cap, processing and communication errors, errors of the Fund’s service providers, counterparties or other third-parties, failed or inadequate processes and technology or systems failures. The Fund and its Adviser and Sub-Adviser seek to reduce these operational risks through controls and procedures. However, these measures do not address every possible risk and may be inadequate to address these risks.

Premium/Discount Risk.    Shares trade on the Exchange at market prices rather than their NAV. The market price of Shares generally corresponds to movements in the Fund’s NAV as well as the relative supply and demand for Shares on the Exchange. The market price may be at, above (a premium) or below (a discount) the Fund’s NAV. Differences in market prices of Shares and the NAV per Share may be due, in large part, to the fact that supply and demand forces at work in the secondary trading market for Shares will be closely related to, but not identical to, the same forces influencing the prices of the Fund’s holdings trading individually or in the aggregate at any point in time. These differences can be especially pronounced during times of market volatility or stress. During these periods, the demand for Shares may decrease considerably and cause the market price of Shares to deviate, and in some cases deviate significantly, from the Fund’s NAV and the bid/ask spread on Shares may widen.

Trading Issues Risk.    Although Shares are listed for trading on the Exchange, there can be no assurance that an active trading market for Shares will develop or be maintained. Trading in Shares on the Exchange may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in Shares inadvisable. In addition, trading in Shares on the Exchange is subject to trading halts caused by extraordinary market volatility pursuant to the Exchange “circuit breaker” rules. Market makers are under no obligation to make a

market in the Shares, and authorized participants are not obligated to submit purchase or redemption orders for Creation Units. There can be no assurance that the requirements of the Exchange necessary to maintain the listing of the Fund will continue to be met or will remain unchanged.

Innovator International Developed 10 Buffer ETF - Quarterly | Tax Risk [Member]  
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Tax Risk.    The Fund has elected to be treated and intends to qualify each year as a regulated investment company (“RIC”) under Subchapter M of the Code. In order to be treated as a RIC, the Fund must meet certain income, diversification and distribution tests. If, in any year, the Fund fails to qualify as a RIC under the applicable tax laws, the Fund would be taxed as an ordinary corporation. The federal income tax treatment of certain aspects of the proposed operations of the Fund is not entirely clear, which could impact the Fund’s ability to qualify as a RIC. This includes the tax aspects of the Fund’s options strategy, its hedging strategy, the possible application of the “straddle” rules, and various loss limitation provisions of the Code. The Fund’s investments in offsetting positions with respect to the Underlying ETF may affect the character of gains or losses realized by the Fund under the Code’s “straddle” rules and may increase any short-term capital gains realized by the Fund. The Fund intends to treat any income it may derive from the FLEX Options as “qualifying income” under the provisions of the Code applicable to RICs. If the income is not qualifying income or the referenced asset is not appropriately treated as the issuer of the FLEX Options, the Fund could lose its own status as a RIC. To maintain its status as a RIC, the Fund must distribute, on an annual basis, at least 90% of its investment company taxable income for each taxable year. In addition, to avoid a non-deductible excise tax, the Fund must distribute on a calendar year basis 98% of its ordinary taxable income and 98.2% of its capital gain net income for each taxable year (plus 100% of any undistributed amounts for prior years). Separately, depending upon the circumstances, sales of its portfolio investments (including FLEX Options) to fund redemptions could cause the Fund to recognize income that the Fund is required to distribute to maintain the Fund’s RIC status and avoid the excise tax. Funding such distributions could require additional sales, which could require more distributions and affect the projected performance of the Fund. Alternatively, if the Fund only makes distributions to maintain its RIC status and becomes subject to the excise tax, that could also affect the projected performance of the Fund. In either case, the assets sold to fund redemptions, distributions or pay the excise tax will not be available to assist the Fund in meeting its target outcome. With respect to the RIC diversification test, identifying the issuer can depend on the terms and conditions of a given investment. There is no published Internal Revenue Service guidance or only limited case law on how to determine the “issuer” of certain derivatives that the Fund will enter into. Based upon language in the legislative history, the Fund intends to treat the issuer of the FLEX Options as the referenced asset, which, assuming the referenced asset qualifies as a RIC, would allow the Fund to qualify for special rules in the RIC diversification requirements. The FLEX Options included in the portfolio are exchange-traded options. Under Section 1256 of the Code, certain types of exchange-traded options are treated as if they were sold (i.e., “marked to market”) at the end of each year. The Fund does not believe that the positions held by the Fund will be subject to Section 1256, which means that the positions will not be marked to market. There is a risk that because the offsetting FLEX Options are being held by a single person that the IRS may take the position that the FLEX Options, viewed together, should be treated as a single instrument for federal tax purposes. The result of such a position would be that the Fund would fail the RIC diversification tests causing the RIC to be taxed as an ordinary corporation, unless certain cure rights based upon reasonable cause may apply. The Fund has obtained an opinion of tax counsel that the FLEX Options should not be collapsed into a single instrument. However, such an opinion is not binding

upon the IRS or the courts. In the event that a shareholder purchases Shares of the Fund before a distribution by the Fund, the entire distribution may be taxable to the shareholder even though a portion of the distribution effectively represents a return of the purchase price.

Innovator International Developed 10 Buffer ETF - Quarterly | Valuation Risk [Member]  
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Valuation Risk.    During periods of reduced market liquidity or in the absence of readily available market quotations for the holdings of the Fund, the valuation of the Fund’s FLEX Options will become more difficult. In market environments where there is reduced availability of reliable objective pricing data, the judgment of the Fund’s investment adviser in determining the fair value of the security may play a greater role. While such determinations may be made in good faith, it may nevertheless be more difficult for the Fund to accurately assign a daily value.

Innovator Nasdaq-100 10 Buffer ETF - Quarterly | Risk Lose Money [Member]  
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Risk [Text Block] You could lose money by investing in the Fund.
Innovator Nasdaq-100 10 Buffer ETF - Quarterly | Risk Not Insured Depository Institution [Member]  
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Risk [Text Block] An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency.
Innovator Nasdaq-100 10 Buffer ETF - Quarterly | Risk Nondiversified Status [Member]  
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Non-Diversification Risk.    The Fund is classified as a “non-diversified company” under the 1940 Act. As a result, the Fund is only limited as to the percentage of its assets which may be invested in the securities of any one issuer by the diversification requirements imposed by the Internal Revenue Code of 1986, as amended (the “Code”). The Fund may invest a relatively high percentage of its assets in a limited number of issuers. As a result, the Fund may be more susceptible to a single adverse economic or regulatory occurrence affecting one or more of these issuers, experience increased volatility and be highly invested in certain issuers.

Innovator Nasdaq-100 10 Buffer ETF - Quarterly | Defined Outcome Strategy Risk [Member]  
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Defined Outcome Strategy Risk.    The Fund, in employing a “defined outcome strategy” is subject to certain unique risks, which are detailed below.

Buffered Loss Risk.    There can be no guarantee that the Fund will be successful in its strategy to provide buffer protection against Underlying ETF losses if the Underlying ETF’s share price decreases by 10% or less over the duration of the Outcome Period. A shareholder may lose their entire investment. The Fund’s strategy seeks to provide the sought-after protection of the Buffer if Shares are held at the time at which the Fund enters into the FLEX Options and held until those FLEX Options expire at the end of the Outcome Period. In the event an investor purchases Shares after the FLEX Options were entered into or sells Shares prior to the expiration of the FLEX Options, the Buffer that the Fund seeks to provide may not be available. The Fund does not provide principal protection or non-principal protection, and an investor may experience significant losses on its investment, including the loss of its entire investment. An investor that holds Shares through multiple Outcome Periods will be unable to recapture losses from prior Outcome Periods because at the end of each Outcome Period, a new Buffer will be established based on the then-current price of the Underlying ETF and any losses experienced below the prior Buffer will be locked-in. Moreover, the quarterly imposition of a new Cap on future gains may make it difficult to recoup any losses from the prior Outcome Periods such that, over multiple Outcome Periods, the Fund may have losses that exceed those of the Underlying ETF. To the extent the Fund invests directly in the Underlying ETF, the Buffer will be provided after the consideration of dividends received, whereby the Fund has assumed an anticipated dividend rate, which is on the historical dividend rate of the Underlying ETF. This assumed dividend rate may be less than dividends actually received by the Fund for the Outcome Period, in which case shareholders may not receive the sought-after downside protection of the Buffer.

Cap Change Risk.    A new Cap is established at the beginning of each Outcome Period and is dependent on prevailing market conditions at the time the Cap is established. As such, the Cap may rise or fall from one Outcome Period to the next and is unlikely to remain the same for consecutive Outcome Periods.

Capped Upside Return Risk.    The Fund’s strategy seeks to provide returns that are subject to the Cap. In the event that the Underlying ETF experiences gains in excess of the Cap for the Outcome Period, the Fund will not participate in, and will underperform the Underlying ETF to the extent of, those gains beyond the Cap. The Fund’s strategy seeks to participate in the upside of the entirety of the Underlying ETF gains (subject to the Cap), if Shares are held at the time at which the Fund enters into the FLEX Options and held until those FLEX Options

expire at the end of the Outcome Period. In the event an investor purchases Shares after the FLEX Options were entered into, there may be little or no ability for that investor to experience an investment gain on their Shares. Due to the size of the Buffer over each quarterly Outcome Period, the Fund expects its Cap to be lower relative to other “defined outcome products” with an annual outcome period and/or a lower buffer. Further, because the FLEX Options are designed to produce the sought-after returns on the last day of the Outcome Period, if an investor sells Shares prior to the expiration date of the FLEX Options such investor may sell at a point where the Fund’s performance does not match the performance of the Underlying ETF over the Outcome Period, and therefore may sell at a point where the Fund has underperformed the Underlying ETF, even if such gains do not exceed the Cap. The Fund seeks to actively manage its portfolio such that any transaction fees incurred by the Fund in connection with the management of the Fund’s assets will not impact the Fund’s performance in seeking to provide upside exposure to the Underlying ETF or the Fund’s ability to experience returns that match the Cap, to the extent the returns of the Underlying ETF are equal to or greater than the Cap. However, it is not guaranteed that the Fund will be able to successfully manage its assets to contemplate the transaction fees incurred by the Fund to achieve the Outcomes sought by the Fund. An investor that holds Shares through multiple Outcome Periods may fail to experience gains comparable to those of the Underlying ETF over time because at the end of each Outcome Period, a new Cap will be established based on the then-current price of the Underlying ETF and any gains above the prior Cap will be forfeited. To the extent the Fund invests directly in the Underlying ETF, the Cap will be provided after the consideration of dividends received, whereby the Fund has assumed an anticipated dividend rate, which is on the historical dividend rate of the Underlying ETF. This assumed dividend rate may be less than dividends actually received by the Fund for the Outcome Period, in which case the Cap will be less than disclosed herein.

Investment Objective Risk.    Certain circumstances under which the Fund might not achieve its objective include, but are not limited, to (i) if the Fund disposes of FLEX Options, (ii) if the Fund is unable to maintain the proportional relationship based on the number of FLEX Options in the Fund’s portfolio, (iii) a significant accrual of Fund expenses in connection with effecting the Fund’s principal investment strategy or (iv) adverse tax law changes or interpretations affecting the treatment of FLEX Options. If these factors were to occur, the Fund may be unable to achieve its investment objective, and investors may not receive the Outcomes described herein. Finally, the Fund is also subject to management risk as an actively-managed fund, which may cause it not to achieve its investment objective.

Management Risk.    Defined outcome strategies are actively-managed and accordingly, the Fund is subject to management risk. The Sub-Adviser applies investment techniques and risk analyses in making investment decisions for the Fund, subject to the oversight of the Adviser, but there can be no guarantee that the Sub-Adviser will properly implement the Fund’s investment strategy and therefore the Fund may not achieve its investment objective or its sought-after Outcomes, or perform as well as similarly situated funds.

Outcome Period Risk.    The Fund’s investment strategy is designed to deliver returns that match those of the Underlying ETF if Shares are held from the time the Fund enters into the FLEX Options and held until those FLEX Options expire at the end of the Outcome Period.

In the event an investor purchases Shares after the FLEX Options were entered into or sells Shares prior to the expiration of the FLEX Options, the returns realized by the investor will not match those that the Fund seeks to provide. An investor that holds Shares through multiple Outcome Periods may fail to experience gains comparable to those of the Underlying ETF over time because at the end of each Outcome Period, a new Cap will be established based on the then-current price of the Underlying ETF and any gains of the Underlying ETF above the prior Cap will be forfeited. In addition, because the Fund is designed to achieve Outcomes that change for each three-month Outcome Period, the Outcomes that are achieved by the Fund for a three-month Outcome Period will be different than the Outcomes achieved by the Fund over multiple Outcome Periods, or on an annualized basis. Similarly, investors holding Shares over multiple Outcome Periods will experience different investment results than holding a fund that has a longer Outcome Period (e.g., one year) and any losses for such holders could exceed the performance for a fund with a longer Outcome Period.

Upside Participation Risk.    There can be no guarantee that the Fund will be successful in its strategy to provide shareholders with returns that match the increases in the price of the Underlying ETF over the Outcome Period, subject to a maximum return imposed by the Cap. In the event an investor purchases Shares after the FLEX Options were entered into or does not stay invested in the Fund for the entirety of the Outcome Period, the returns realized by such investor may not match those that the Fund seeks to achieve. The Fund is subject to a Cap which may be lower relative to other “defined outcome products” and, as a result, any positive investment returns delivered by the Fund may be lower in comparison to such products and to that of the Underlying ETF.

Innovator Nasdaq-100 10 Buffer ETF - Quarterly | Derivatives Risk [Member]  
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Derivatives Risk.    To employ the Fund’s defined outcome strategy, the Fund utilizes FLEX Options, which are a type of derivative instrument. The use of derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities and other traditional investments. These risks include: (i) the risk that the counterparty to a derivative transaction may not fulfill its contractual obligations; (ii) risk of mispricing or improper valuation; and (iii) the risk that changes in the value of the derivative may not correlate perfectly with the underlying asset. Derivative prices are highly volatile and may fluctuate substantially during a short period of time. Such prices are influenced by numerous factors that affect the markets, including, but not limited to: (i) changing supply and demand relationships; (ii) government programs and policies; (iii) national and international political and economic events; (iv) changes in interest rates; (v) inflation and deflation; and (vi) changes in supply and demand relationships. Trading derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities. Derivative contracts ordinarily have leverage inherent in their terms, which can magnify potential for gain or loss and, therefore, amplify the effects of market volatility on share price. The Fund has taken the necessary steps to comply with the requirements of Rule 18f-4 under the 1940 Act (“Rule 18f-4”) in its usage of FLEX Options. The Fund has adopted and implements a derivatives risk management program that contains policies and procedures reasonably designed to manage the Fund’s derivatives risks, has appointed a derivatives risk manager who is responsible for administrating the derivatives risk management program, complies with outer limitations on risks relating to its derivatives transactions and carries out enhanced reporting to the Board, the SEC and the public regarding its derivatives activities. To the extent the Fund is noncompliant with Rule 18f-4, the Fund may be required to adjust its investment

portfolio which may, in turn, negatively impact the Fund’s ability to deliver the sought-after Outcomes. In addition to the foregoing, the Fund is subject to the following risks associated with its use of derivative instruments:

Clearing Member Default Risk.    Transactions in some types of derivatives, including FLEX Options, are required to be centrally cleared (“cleared derivatives”). In a transaction involving cleared derivatives, the Fund’s counterparty is a clearing house, such as the OCC, rather than a bank or broker. Since the Fund is not a member of clearing houses and only members of a clearing house (“clearing members”) can participate directly in the clearing house, the Fund will hold cleared derivatives through accounts at clearing members. In cleared derivatives positions, the Fund will make payments (including margin payments) to, and receive payments from, a clearing house through their accounts at clearing members. Customer funds held at a clearing organization in connection with any option contracts are held in a commingled omnibus account and are not identified to the name of the clearing member’s individual customers. As a result, assets deposited by the Fund with any clearing member as margin for its FLEX Options may, in certain circumstances, be used to satisfy losses of other clients of the Fund’s clearing member. In addition, although clearing members guarantee performance of their clients’ obligations to the clearing house, there is a risk that the assets of the Fund might not be fully protected in the event of the clearing member’s bankruptcy. The Fund is also subject to the risk that a limited number of clearing members are willing to transact on the Fund’s behalf, which heightens the risks associated with a clearing member’s default. If a clearing member defaults the Fund could lose some or all of the benefits of a transaction entered into by the Fund with the clearing member. The loss of a clearing member for the Fund to transact with could result in increased transaction costs and other operational issues that could impede the Fund’s ability to implement its investment strategy. If the Fund cannot find a clearing member to transact with on the Fund’s behalf, the Fund may be unable to effectively implement its investment strategy.

Correlation Risk.    The FLEX Options held by the Fund will be exercisable at the strike price only on their expiration date. As a FLEX Option approaches its expiration date, its value typically will increasingly move with the value of the Underlying ETF. However, the value of the FLEX Options may vary prior to the expiration date because of related factors other than the value of the Underlying ETF. The value of the FLEX Options will be determined based upon market quotations or using other recognized pricing methods. Factors that may influence the value of the FLEX Options include interest rate changes and implied volatility levels of the Underlying ETF, among others. The value of the FLEX Options held by the Fund typically do not increase or decrease at the same level as the Underlying ETF’s share price on a day-to-day basis due to these factors (although they generally move in the same direction). Since the Underlying ETF has the potential to be more volatile than other funds, in the period between the beginning and end of the Outcome Period, it is possible that the degree of non-correlation between the value of the FLEX Options and the value of the Underlying ETF will be higher than if the FLEX Options utilized a less volatile fund as their reference asset.

Counterparty Risk.    Counterparty risk is the risk an issuer, guarantor or counterparty of a security in the Fund is unable or unwilling to meet its obligation on the security. Counterparty risk may arise because of the counterparty’s financial condition, market activities, or for other reasons. The Fund may be unable to recover its investment from the counterparty or may

obtain a limited and/or delayed recovery. The OCC acts as guarantor and central counterparty with respect to the FLEX Options. As a result, the ability of the Fund to meet its objective depends on the OCC being able to meet its obligations. In the event an OCC clearing member that is a counterparty of the Fund were to become insolvent, the Fund may have some or all of its FLEX Options closed without its consent or may experience delays or other difficulties in attempting to close or exercise its affected FLEX Options positions, both of which would impair the Fund’s ability to deliver on its investment strategy. The OCC’s rules and procedures are designed to facilitate the prompt settlement of options transactions and exercises, including for clearing member insolvencies. However, there is the risk that the OCC and its backup system will fail if clearing member insolvencies are substantial or widespread. In the unlikely event that the OCC becomes insolvent or is otherwise unable to meet its settlement obligations, the Fund could suffer significant losses.

FLEX Options Risk.    The Fund will utilize FLEX Options issued and guaranteed for settlement by the OCC. The use of option contracts involves investment strategies and risks different from those associated with ordinary portfolio securities transactions. The prices of option contracts are volatile and are influenced by, among other things, actual and anticipated changes in the value of the underlying instrument, changes in interest or currency exchange rates, including the anticipated volatility, which are affected by fiscal and monetary policies and by national and international political, changes in the actual or implied volatility or the reference asset, the time remaining until the expiration of the option contract and economic events. There may at times be an imperfect correlation between the movement in values option contracts and the reference asset, and there may at times not be a liquid secondary market for certain option contracts.

The Fund bears the risk that the OCC will be unable or unwilling to perform its obligations under the FLEX Options contracts. In the unlikely event that the OCC becomes insolvent or is otherwise unable to meet its settlement obligations, the Fund could suffer significant losses. Additionally, FLEX Options may be less liquid than certain other securities, such as standardized options. In less liquid markets for the FLEX Options, the Fund may have difficulty closing out certain FLEX Options positions at desired times and prices. In connection with the creation and redemption of Shares, to the extent market participants are not willing or able to enter into FLEX Option transactions with the Fund at prices that reflect the market price of the Shares, the Fund’s NAV and, in turn the share price of the Fund, could be negatively impacted.

The Fund may experience substantial downside from specific FLEX Option positions and certain FLEX Option positions may expire worthless. The FLEX Options held by the Fund are exercisable at the strike price on their expiration date. As a FLEX Option approaches its expiration date, its value typically increasingly moves with the value of the Underlying ETF. However, prior to such date, the value of the FLEX Options does not increase or decrease at the same rate as the Underlying ETF’s share price on a day-to-day basis (although they generally move in the same direction). The value of the FLEX Options held by the Fund will be determined based on market quotations or other recognized pricing methods. The value of the underlying FLEX Options will be affected by, among others, changes in the Underlying ETF’s share price, changes in interest rates, changes in the actual and implied volatility of the Underlying ETF and the remaining time to until the FLEX Options expire.

Liquidity Risk.    In the event that trading in the underlying FLEX Options is limited or absent, the value of the Fund’s FLEX Options may decrease. There is no guarantee that a liquid secondary trading market will exist for the FLEX Options. The trading in FLEX Options may be less deep and liquid than the market for certain other securities, including certain non-customized option contracts. In a less liquid market for the FLEX Options, terminating the FLEX Options may require the payment of a premium or acceptance of a discounted price and may take longer to complete. Additionally, the liquidation of a large number of FLEX Options may more significantly impact the price in a less liquid market. Further, the Fund requires a sufficient number of participants to facilitate the purchase and sale of options on an exchange to provide liquidity to the Fund for its FLEX Option positions. A less liquid trading market may adversely impact the value of the FLEX Options and the value of your investment.

Innovator Nasdaq-100 10 Buffer ETF - Quarterly | Underlying ETF Risk [Member]  
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Underlying ETF Risk.    The Fund’s investment performance largely depends on the investment performance and associated risks of the Underlying ETF. The Underlying ETF is subject to many of the same structural risks as the Fund that are described in more detail herein (see “Risks Associated with ETFs” below). The Adviser expects to waive a portion of its management fee in an amount that equals to any acquired fund fees and expenses the Fund incurs as a result of any direct investment in the Underlying ETF. However, if the Adviser does not waive such expenses in the future, the Fund will bear its proportionate share of the Underlying ETF’s expenses, subjecting Fund shareholders to such expenses. Further, the risks of investing in an ETF also include the risks associated with the underlying investments held by the ETF. As such, the Fund may be subject to the following risks as a result of its exposure to the Underlying ETF (or the components thereof):

Equity Securities Risk.    Equity securities may decline in value because of declines in the price of a particular holding or the broad stock market. Such declines may relate directly to the issuer of a security or broader economic or market events, including changes in interest rates. The value of shares will fluctuate with changes in the value of the equity securities the Underlying ETF invests in.

Information Technology Companies Risk.    Information technology companies face intense competition, both domestically and internationally, which may have an adverse effect on profit margins. Like other technology companies, information technology companies may have limited product lines, markets, financial resources or personnel. The products of information technology companies may face obsolescence due to rapid technological developments, frequent new product introduction, unpredictable changes in growth rates and competition for the services of qualified personnel. Companies in the information technology sector are heavily dependent on patent and intellectual property rights. The loss or impairment of these rights may adversely affect the profitability of these companies. Information technology companies are facing increased government and regulatory scrutiny and may be subject to adverse government or regulatory action.

Large Capitalization Companies Risk.    Large capitalization companies may grow at a slower rate and be less able to adapt to changing market conditions than smaller capitalization companies. Thus, the return on investment in securities of large capitalization companies may be less than the return on investment in securities of small and/or mid capitalization companies. The performance of large capitalization companies also tends to trail the overall market during different market cycles.

Innovator Nasdaq-100 10 Buffer ETF - Quarterly | Concentration Risk [Member]  
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Concentration Risk.    Through its exposure to the Underlying ETF, the Fund will concentrate in the securities of a particular industry or group of industries to the same extent as the Underlying ETF. To the extent the Fund has significant exposure in a single asset class or the securities of issuers within the same country, state, region, industry or sector, an adverse economic, business or political development may affect the value of the Fund’s investments more than if the Fund were more broadly diversified. A significant exposure makes the Fund more susceptible to any single occurrence and may subject the Fund to greater market risk than a fund that is more broadly diversified.

Innovator Nasdaq-100 10 Buffer ETF - Quarterly | Cyber Security Risk [Member]  
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Cyber Security Risk.    As the use of Internet technology has become more prevalent in the course of business, the investment industry has become more susceptible to potential operational risks through breaches in cyber security. A breach in cyber security refers to both intentional and unintentional events that may cause the Fund to lose proprietary information, suffer data corruption or lose operational capacity. Such events could cause the Fund to incur regulatory penalties, reputational damage, additional compliance costs associated with corrective measures and/or financial loss. Cyber security breaches may involve unauthorized access to the Fund’s digital information systems through “hacking” or malicious software coding, but may also result from outside attacks such as denial-of-service attacks through efforts to make network services unavailable to intended users. In addition, cyber security breaches of the Fund’s third-party service providers, such as its administrator, transfer agent, or custodian can also subject the Fund to many of the same risks associated with direct cyber security breaches. The Fund has established risk management systems designed to reduce the risks associated with cyber security. However, there is no guarantee that such efforts will succeed, especially because the Fund does not directly control the cyber security systems of issuers or third-party service providers.

Innovator Nasdaq-100 10 Buffer ETF - Quarterly | Market Risk [Member]  
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Market Risk.    The Fund could lose money over short periods due to short-term market movements and over longer periods during more prolonged market downturns. Assets may decline in value due to factors affecting financial markets generally or particular asset classes or industries represented in the markets. The value of FLEX Options or other assets may also decline due to general market conditions, economic trends or events that are not specifically related to the issuer of the security or other asset, or due to factors that affect a particular issuer or issuers, country, group of countries, region, market, industry, group of industries, sector or asset class. During a general market downturn, multiple asset classes may be negatively affected. Changes in market conditions and interest rates will not have the same impact on all types of securities. Securities, including the Shares, are subject to market fluctuations and liquidity constraints that may be caused by such factors as economic, political, or regulatory developments, changes in interest rates, and/or perceived trends in securities prices. Shares of the Fund could decline in value or underperform other investments. The value of Shares may also decline as a result of market conditions. Factors such as inflation, changes in interest rates, changes in regulatory requirements, bank failures, political climate deterioration or developments, armed conflicts, natural disasters or future health crises, may negatively impact market conditions, and cause a decrease in the value of Shares. Other unexpected political, regulatory and diplomatic events within the U.S. and abroad may affect investor and consumer confidence and may adversely impact financial markets and the broader economy. These events, and any other future events, may adversely affect the prices and liquidity of the Fund’s portfolio investments and could result in disruptions in the trading markets.

Innovator Nasdaq-100 10 Buffer ETF - Quarterly | Risks Associated with ETFs [Member]  
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Risks Associated with ETFs.    The Fund is an ETF, and therefore, as a result of an ETF’s structure, is subject to the following risks:

Authorized Participant Concentration Risk.    Only an authorized participant may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that may act as authorized participants on an agency basis (i.e., on behalf of other market participants). To the extent that authorized participants exit the business or are unable to proceed with orders for the issuance or redemption of Creation Units and no other authorized participant is able to step forward to fulfill the order, Shares may be more likely to trade at a premium or discount to NAV and possibly face trading halts and/or delisting, and the bid/ask spread (the difference between the price that someone is willing to pay for Shares at a specific point in time versus the price at which someone is willing to sell) on Shares may widen.

Cash Transactions Risk.    The Fund may effectuate all or a portion of the issuance and redemption of Creation Units for cash, rather than in-kind securities. As a result, an investment in the Fund may be less tax-efficient than an investment in an ETF that effectuates its Creation Units only on an in-kind basis. ETFs are able to make in-kind redemptions to avoid being taxed on gains on the distributed portfolio securities at the fund level. A fund that effects redemptions for cash may be required to sell portfolio securities in order to obtain the cash needed to distribute redemption proceeds and may be forced to recognize gains. The Fund intends to distribute gains that arise by virtue of the issuance and redemption of Creation Units being effectuated in cash to shareholders to avoid being taxed on this gain at the fund level and otherwise comply with special tax rules that apply to it. This may cause shareholders to be subject to tax on gains they would not otherwise be subject to, or at an earlier date than if they had made an investment in another ETF. Moreover, cash transactions may have to be carried out over several days if the securities market is relatively illiquid and may involve considerable brokerage fees and taxes. These brokerage fees and taxes, which will be higher than if the Fund sold and redeemed its shares principally in-kind, will be passed on to those purchasing and redeeming Creation Units in the form of creation and redemption transaction fees. The Fund’s use of cash for creations and redemptions could also result in dilution to the Fund and increased transaction costs, which could negatively impact the Fund’s ability to achieve its investment objective.

Market Maker Risk.    If the Fund has lower average daily trading volumes, it may rely on a small number of third-party market makers to provide a market for the purchase and sale of Shares. Any trading halt or other problem relating to the trading activity of these market makers could result in a dramatic change in the spread between the Fund’s NAV and the price at which the Shares are trading on the Exchange, which could result in a decrease in the market price of

the Shares. In addition, decisions by market makers or authorized participants to reduce their role or step away from these activities in times of market stress could inhibit the effectiveness of the arbitrage process in maintaining the relationship between the underlying values of the Fund’s portfolio securities and the Fund’s market price. This reduced effectiveness could result in Shares trading at a discount to NAV and in greater than normal intra-day bid-ask spreads for Shares.

Operational Risk.    The Fund is exposed to operational risks arising from a number of factors, including, but not limited to, human error in the calculation of the Cap, processing and communication errors, errors of the Fund’s service providers, counterparties or other third-parties, failed or inadequate processes and technology or systems failures. The Fund and its Adviser and Sub-Adviser seek to reduce these operational risks through controls and procedures. However, these measures do not address every possible risk and may be inadequate to address these risks.

Premium/Discount Risk.    Shares trade on the Exchange at market prices rather than their NAV. The market price of Shares generally corresponds to movements in the Fund’s NAV as well as the relative supply and demand for Shares on the Exchange. The market price may be at, above (a premium) or below (a discount) the Fund’s NAV. Differences in market prices of Shares and the NAV per Share may be due, in large part, to the fact that supply and demand forces at work in the secondary trading market for Shares will be closely related to, but not identical to, the same forces influencing the prices of the Fund’s holdings trading individually or in the aggregate at any point in time. These differences can be especially pronounced during times of market volatility or stress. During these periods, the demand for Shares may decrease considerably and cause the market price of Shares to deviate, and in some cases deviate significantly, from the Fund’s NAV and the bid/ask spread on Shares may widen.

Trading Issues Risk.    Although Shares are listed for trading on the Exchange, there can be no assurance that an active trading market for Shares will develop or be maintained. Trading in Shares on the Exchange may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in Shares inadvisable. In addition, trading in Shares on the Exchange is subject to trading halts caused by extraordinary market volatility pursuant to the Exchange “circuit breaker” rules. Market makers are under no obligation to make a market in the Shares, and authorized participants are not obligated to submit purchase or redemption orders for Creation Units. There can be no assurance that the requirements of the Exchange necessary to maintain the listing of the Fund will continue to be met or will remain unchanged.

Innovator Nasdaq-100 10 Buffer ETF - Quarterly | Tax Risk [Member]  
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Tax Risk.    The Fund has elected to be treated and intends to qualify each year as a regulated investment company (“RIC”) under Subchapter M of the Code. In order to be treated as a RIC, the Fund must meet certain income, diversification and distribution tests. If, in any year, the Fund fails to qualify as a RIC under the applicable tax laws, the Fund would be taxed as an ordinary corporation. The federal income tax treatment of certain aspects of the proposed operations of the Fund is not entirely clear, which could impact the Fund’s ability to qualify as a RIC. This includes the tax aspects of the Fund’s options strategy, its hedging strategy, the possible application of the “straddle” rules, and various loss limitation provisions of the Code. The Fund’s investments in offsetting positions with respect to the Underlying ETF may affect the character of gains or

losses realized by the Fund under the Code’s “straddle” rules and may increase any short-term capital gains realized by the Fund. The Fund intends to treat any income it may derive from the FLEX Options as “qualifying income” under the provisions of the Code applicable to RICs. If the income is not qualifying income or the referenced asset is not appropriately treated as the issuer of the FLEX Options, the Fund could lose its own status as a RIC. To maintain its status as a RIC, the Fund must distribute, on an annual basis, at least 90% of its investment company taxable income for each taxable year. In addition, to avoid a non-deductible excise tax, the Fund must distribute on a calendar year basis 98% of its ordinary taxable income and 98.2% of its capital gain net income for each taxable year (plus 100% of any undistributed amounts for prior years). Separately, depending upon the circumstances, sales of its portfolio investments (including FLEX Options) to fund redemptions could cause the Fund to recognize income that the Fund is required to distribute to maintain the Fund’s RIC status and avoid the excise tax. Funding such distributions could require additional sales, which could require more distributions and affect the projected performance of the Fund. Alternatively, if the Fund only makes distributions to maintain its RIC status and becomes subject to the excise tax, that could also affect the projected performance of the Fund. In either case, the assets sold to fund redemptions, distributions or pay the excise tax will not be available to assist the Fund in meeting its target outcome. With respect to the RIC diversification test, identifying the issuer can depend on the terms and conditions of a given investment. There is no published Internal Revenue Service guidance or only limited case law on how to determine the “issuer” of certain derivatives that the Fund will enter into. Based upon language in the legislative history, the Fund intends to treat the issuer of the FLEX Options as the referenced asset, which, assuming the referenced asset qualifies as a RIC, would allow the Fund to qualify for special rules in the RIC diversification requirements. The FLEX Options included in the portfolio are exchange-traded options. Under Section 1256 of the Code, certain types of exchange-traded options are treated as if they were sold (i.e., “marked to market”) at the end of each year. The Fund does not believe that the positions held by the Fund will be subject to Section 1256, which means that the positions will not be marked to market. There is a risk that because the offsetting FLEX Options are being held by a single person that the IRS may take the position that the FLEX Options, viewed together, should be treated as a single instrument for federal tax purposes. The result of such a position would be that the Fund would fail the RIC diversification tests causing the RIC to be taxed as an ordinary corporation, unless certain cure rights based upon reasonable cause may apply. The Fund has obtained an opinion of tax counsel that the FLEX Options should not be collapsed into a single instrument. However, such an opinion is not binding upon the IRS or the courts. In the event that a shareholder purchases Shares of the Fund before a distribution by the Fund, the entire distribution may be taxable to the shareholder even though a portion of the distribution effectively represents a return of the purchase price.

Innovator Nasdaq-100 10 Buffer ETF - Quarterly | Valuation Risk [Member]  
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Valuation Risk.    During periods of reduced market liquidity or in the absence of readily available market quotations for the holdings of the Fund, the valuation of the Fund’s FLEX Options will become more difficult. In market environments where there is reduced availability of reliable objective pricing data, the judgment of the Fund’s investment adviser in determining the fair value of the security may play a greater role. While such determinations may be made in good faith, it may nevertheless be more difficult for the Fund to accurately assign a daily value.

Innovator Power Buffer Step-Up Strategy ETF | Risk Lose Money [Member]  
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Risk [Text Block] You could lose money by investing in the Fund.
Innovator Power Buffer Step-Up Strategy ETF | Risk Not Insured Depository Institution [Member]  
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Risk [Text Block] An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency.
Innovator Power Buffer Step-Up Strategy ETF | Risk Nondiversified Status [Member]  
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Non-Diversification Risk.    The Fund is classified as a “non-diversified company” under the 1940 Act. As a result, the Fund is only limited as to the percentage of its assets which may be invested in the securities of any one issuer by the diversification requirements imposed by the Internal Revenue Code of 1986, as amended (the “Code”). The Fund may invest a relatively high percentage of its assets in a limited number of issuers. As a result, the Fund may be more susceptible to a single adverse economic or regulatory occurrence affecting one or more of these issuers, experience increased volatility and be highly invested in certain issuers.

Innovator Power Buffer Step-Up Strategy ETF | Investment Strategy Risk [Member]  
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Investment Strategy Risk.    The Fund’s investment strategy subjects it to certain unique risks, which are detailed below.

Buffer Risk.    There can be no guarantee that the Fund will be successful in implementing its strategy to provide Buffer protection with its investment in the Options Portfolio. A shareholder may lose their entire investment. The Buffer is provided at the expiration of the options contracts. Any interim losses experienced by the Underlying ETF may be experienced by the Fund and its shareholders. Because the Options Portfolio provides a Buffer against the first 15% of Underlying ETF losses measured from the time in which the Fund enters into the FLEX Options contracts and only for the duration of the one-year term of the options contract, it is possible that, during the term of any Options Portfolio, shareholders will realize some losses on price decreases of the Underlying ETF. These potential losses are possible even if a shareholder remained in the Fund for a one-year period after an Options Portfolio was established, as it is likely that the Options Portfolio will reset during that time. The Fund does not provide principal protection or non-principal protection, and an investor may experience significant losses on its investment, including the loss of its entire investment. To the extent the Fund invests directly in the Underlying ETF, the Buffer will be provided after the consideration of dividends received, whereby the Fund has assumed an anticipated dividend rate, which is on the historical dividend rate of the Underlying ETF. This assumed dividend rate may be less than dividends actually received by the Fund, in which case investors may not receive the sought-after downside protection of the Buffer.

Concentration Risk.    The Fund will concentrate in the securities of a particular industry or group of industries to the same extent as the Underlying ETF. To the extent the Fund has significant exposure in a single asset class or the securities of issuers within the same country, state, region, industry or sector, an adverse economic, business or political development may affect the value of the Fund’s investments more than if the Fund were more broadly diversified. A significant exposure makes the Fund more susceptible to any single occurrence and may subject the Fund to greater market risk than a fund that is more broadly diversified.

Investment Objective Risk.    Certain circumstances under which the Fund might not achieve its objective include, but are not limited, to (i) if the Fund disposes of FLEX Options, (ii) if the Fund is unable to maintain the proportional relationship based on the number of FLEX Options in the Fund’s portfolio, (iii) a significant accrual of Fund expenses in connection with effecting the Fund’s principal investment strategy or (iv) adverse tax law changes or interpretations affecting the treatment of FLEX Options.

Management Risk.    The Fund is subject to management risk because it is an actively managed portfolio. The Sub-Adviser applies investment techniques and risk analyses in making investment decisions for the Fund, subject to the oversight of the Adviser, but there can be no guarantee that the Sub-Adviser will properly implement the Fund’s investment strategy and therefore the Fund may not achieve its investment objective or perform as well as similarly situated funds.

Market Underperformance Risk.    The Fund’s investment strategy may cause the Fund to underperform the Underlying ETF and/or the S&P 500® Index. The underperformance may be a result of management risk or the implementation of the Fund’s investment strategy.

Step-Up Strategy Risk.    The Fund seeks to provide risk-managed investment exposure to the Underlying ETF through its step-up investment strategy. Because the step-up strategy makes it very unlikely that the Fund will hold an option contract to its expiration, shareholders will likely experience investment results that are very different than if the Fund held the options contracts until expiration and/or those of the Underlying ETF. There is also no guarantee the Fund will be successful in implementing this strategy.

In order to provide the Buffer, the Fund’s strategy is subject to maximum potential gains. This maximum potential gain will likely change at each resetting of the Option’s Portfolio. In the event an investor purchases Shares after the FLEX Option contracts were entered into and prior to the time the Sub-Adviser determines to step-up the Options Portfolio or the expiration of such option contracts, there may be little or no ability for that investor to experience an investment gain on their Shares or little or no ability to benefit from a Buffer protection of the Option Portfolio until the Sub-Adviser rebalances the Fund’s Options Portfolio. However, there is no guarantee that, at the end of any given month, the Fund will be able to enter into a more advantageous Options Portfolio and effectively implement the step-up mechanism. To the extent the Fund invests directly in the Underlying ETF, the maximum upside potential will be calculated after the consideration of dividends received, whereby the Fund has assumed an anticipated dividend rate, which is on the historical dividend rate of the Underlying ETF. This assumed dividend rate may be less than dividends actually received by the Fund, in which case the maximum upside potential for the Fund will be less than such calculated amount.

In addition, the Fund’s step-up strategy may result in performance over certain periods of time that is lower than that of the Underlying ETF or of a fund that is designed to hold an options portfolio until expiration. Because the value of the FLEX Options does not increase or decrease at the same rate as the Underlying ETF’s share price on a day-to-day basis (although they generally move in the same direction) there may be periods of time in which the Fund’s NAV underperforms the return of the Underlying ETF. Accordingly, if the Sub-Adviser rebalances the Options Portfolio prior to its one-year expiration in accordance with the step-up strategy, the Fund may have underperformed the Underlying ETF for that period of time. Similarly, the Sub-Adviser may elect to reset the Fund’s Options Portfolio at a point in time in which the Fund has utilized all or a portion of its Buffer. While this will provide shareholders with the potential of an additional Buffer, the Options Portfolio would simultaneously reset its maximum gain potential and could lower the Fund’s upside performance potential over certain time periods.

Upside Participation Risk.    There can be no guarantee that the Fund will be successful in its strategy to provide shareholders with a return that correlates to increases in the price of the Underlying ETF over time. The Fund may realize different returns than the return of the Underlying ETF until the expiration of the options contracts. In the event the Sub-Adviser utilizes the Fund’s step-up mechanism and resets the Options Portfolio and there is a difference between the NAV performance of the Fund and the return of the Underlying ETF, such difference would result in a shareholder experiencing different returns than the Underlying ETF.

Innovator Power Buffer Step-Up Strategy ETF | Derivatives Risk [Member]  
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Derivatives Risk.    To employ the Fund’s investment strategy, the Fund utilizes derivative instruments. The use of derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities and other traditional investments. These risks include: (i) the risk that the counterparty to a derivative transaction may not fulfill its contractual obligations; (ii) risk of mispricing or improper valuation; and (iii) the risk that changes in the value of the derivative may not correlate perfectly with the underlying asset. Derivative prices are highly volatile and may fluctuate substantially during a short period of time. Such prices are influenced by numerous factors that affect the markets, including, but not limited to: (i) changing supply and demand relationships; (ii) government programs and policies; (iii) national and international political and economic events; (iv) changes in interest rates; (v) inflation and deflation; and (vi) changes in supply and demand relationships. Trading derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities. Derivative contracts ordinarily have leverage inherent in their terms, which can magnify potential for gain or loss and, therefore, amplify the effects of market volatility on share price. The Fund has taken the necessary steps to comply with the requirements of Rule 18f-4 under the 1940 Act (“Rule 18f-4”) in its usage of FLEX Options. The Fund has adopted and implements a derivatives risk management program that contains policies and procedures reasonably designed to manage the Fund’s derivatives risks, has appointed a derivatives risk manager who is responsible for administrating the derivatives risk management program, complies with outer limitations on risks relating to its derivatives transactions and carries out enhanced reporting to the Board, the SEC and the public regarding its derivatives activities. To the extent the Fund is noncompliant with Rule 18f-4, the Fund may be required to adjust its investment portfolio which may, in turn, negatively impact the Fund’s ability to achieve its investment objective. In addition to the foregoing, the Fund is subject to the following risks associated with its use of derivative instruments:

Clearing Member Default Risk.    Transactions in some types of derivatives, including FLEX Options, are required to be centrally cleared (“cleared derivatives”). In a transaction involving cleared derivatives, the Fund’s counterparty is a clearing house, such as the OCC, rather than a bank or broker. Since the Fund is not a member of clearing houses and only members of a clearing house (“clearing members”) can participate directly in the clearing house, the Fund will hold cleared derivatives through accounts at clearing members. In cleared derivatives positions, the Fund will make payments (including margin payments) to, and receive payments from, a clearing house through their accounts at clearing members. Customer funds held at a clearing organization in connection with any option contracts are held in a commingled omnibus account and are not identified to the name of the clearing member’s individual customers. As a result, assets deposited by the Fund with any clearing member as margin for its FLEX Options may, in certain circumstances, be used to satisfy losses of other clients of the Fund’s clearing member. In addition, although clearing members guarantee performance of their clients’ obligations to the clearing house, there is a risk that the assets of the Fund might not be fully protected in the event of the clearing member’s bankruptcy. The Fund is also subject to the risk that a limited number of clearing members are willing to transact on the Fund’s behalf, which heightens the risks associated with a clearing member’s default. If a clearing member defaults the Fund could lose some or all of the benefits of a transaction entered into by the Fund with the clearing member. The loss of a clearing member for the Fund to transact with could result in increased transaction costs and other operational issues that could impede the Fund’s ability to implement its investment strategy. If the Fund cannot find a clearing member to transact with on the Fund’s behalf, the Fund may be unable to effectively implement its investment strategy.

Correlation Risk.    The FLEX Options held by the Fund will be exercisable at the strike price only on their expiration date. As a FLEX Option approaches its expiration date, its value typically will increasingly move with the value of the Underlying ETF. However, the value of the FLEX Options may vary prior to the expiration date because of related factors other than the value of the Underlying ETF. The value of the FLEX Options will be determined based upon market quotations or using other recognized pricing methods. Factors that may influence the value of the FLEX Options include interest rate changes and implied volatility levels of the Underlying ETF, among others. The value of the FLEX Options held by the Fund typically do not increase or decrease at the same level as the Underlying ETF’s share price on a day-to-day basis due to these factors (although they generally move in the same direction). Since the FLEX Options held by the Fund have expiration dates of approximately one-year, it is possible that the degree of non-correlation between the value of the FLEX Options and the value of the Underlying ETF will be higher versus FLEX Options with shorter terms.

Counterparty Risk.    Counterparty risk is the risk an issuer, guarantor or counterparty of a security in the Fund is unable or unwilling to meet its obligation on the security. Counterparty risk may arise because of the counterparty’s financial condition, market activities, or for other reasons. The Fund may be unable to recover its investment from the counterparty or may obtain a limited and/or delayed recovery. The OCC acts as guarantor and central counterparty with respect to the FLEX Options. As a result, the ability of the Fund to meet its objective depends on the OCC being able to meet its obligations. In the event an OCC clearing member that is a counterparty of the Fund were to become insolvent, the Fund may have some or all of its FLEX Options closed without its consent or may experience delays or other difficulties in attempting to close or exercise its affected FLEX Options positions, both of which would impair the Fund’s ability to deliver on its investment strategy. The OCC’s rules and procedures are designed to facilitate the prompt settlement of options transactions and exercises, including for clearing member insolvencies. However, there is the risk that the OCC and its backup system will fail if clearing member insolvencies are substantial or widespread. In the unlikely event that the OCC becomes insolvent or is otherwise unable to meet its settlement obligations, the Fund could suffer significant losses.

FLEX Options Risk.    The Fund will utilize FLEX Options issued and guaranteed for settlement by the OCC. The use of option contracts involves investment strategies and risks different from those associated with ordinary portfolio securities transactions. The prices of option contracts are volatile and are influenced by, among other things, actual and anticipated changes in the value of the underlying instrument, changes in interest or currency exchange rates, including the anticipated volatility, which are affected by fiscal and monetary policies and by national and international political, changes in the actual or implied volatility or the reference asset, the time remaining until the expiration of the option contract and economic events. There may at times be an imperfect correlation between the movement in values option contracts and the reference asset, and there may at times not be a liquid secondary market for certain option contracts.

The Fund bears the risk that the OCC will be unable or unwilling to perform its obligations under the FLEX Options contracts. In the unlikely event that the OCC becomes insolvent or is otherwise unable to meet its settlement obligations, the Fund could suffer significant losses. Additionally, FLEX Options may be less liquid than certain other securities, such as

standardized options. In less liquid markets for the FLEX Options, the Fund may have difficulty closing out certain FLEX Options positions at desired times and prices. In connection with the creation and redemption of Shares, to the extent market participants are not willing or able to enter into FLEX Option transactions with the Fund at prices that reflect the market price of the Shares, the Fund’s NAV and, in turn the share price of the Fund, could be negatively impacted.

The Fund may experience substantial downside from specific FLEX Option positions and certain FLEX Option positions may expire worthless. The FLEX Options held by the Fund are exercisable at the strike price on their expiration date. As a FLEX Option approaches its expiration date, its value typically increasingly moves with the value of the Underlying ETF. However, prior to such date, the value of the FLEX Options does not increase or decrease at the same rate as the Underlying ETF’s share price on a day-to-day basis (although they generally move in the same direction). The value of the FLEX Options held by the Fund will be determined based on market quotations or other recognized pricing methods. The value of the underlying FLEX Options will be affected by, among others, changes in the Underlying ETF’s share price, changes in interest rates, changes in the actual and implied volatility of the Underlying ETF and the remaining time to until the FLEX Options expire.

Liquidity Risk.    In the event that trading in the underlying FLEX Options is limited or absent, the value of the Fund’s FLEX Options may decrease. There is no guarantee that a liquid secondary trading market will exist for the FLEX Options. The trading in FLEX Options may be less deep and liquid than the market for certain other securities, including certain non-customized option contracts. In a less liquid market for the FLEX Options, terminating the FLEX Options may require the payment of a premium or acceptance of a discounted price and may take longer to complete. Additionally, the liquidation of a large number of FLEX Options may more significantly impact the price in a less liquid market. Further, the Fund requires a sufficient number of participants to facilitate the purchase and sale of options on an exchange to provide liquidity to the Fund for its FLEX Option positions. A less liquid trading market may adversely impact the value of the FLEX Options and the value of your investment.

Innovator Power Buffer Step-Up Strategy ETF | Underlying ETF Risk [Member]  
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Underlying ETF Risk.    The Fund’s investment performance largely depends on the investment performance and associated risks of the Underlying ETF. The Underlying ETF is subject to many of the same structural risks as the Fund that are described in more detail herein (see “Risks Associated with ETFs” below). The Adviser expects to waive a portion of its management fee in an amount that equals to any acquired fund fees and expenses the Fund incurs as a result of any direct investment in the Underlying ETF. However, if the Adviser does not waive such expenses in the future, the Fund will bear its proportionate share of the Underlying ETF’s expenses, subjecting Fund shareholders to such expenses. Further, the risks of investing in an ETF also include the risks associated with the underlying investments held by the ETF. As such, the Fund may be subject to the following risks as a result of its exposure to the Underlying ETF (or the components thereof):

Equity Securities Risk.    Equity securities may decline in value because of declines in the price of a particular holding or the broad stock market. Such declines may relate directly to the issuer of a security or broader economic or market events, including changes in interest rates. The value of shares will fluctuate with changes in the value of the equity securities the Underlying ETF invests in.

Information Technology Companies Risk.    Information technology companies face intense competition, both domestically and internationally, which may have an adverse effect on profit margins. Like other technology companies, information technology companies may have limited product lines, markets, financial resources or personnel. The products of information technology companies may face obsolescence due to rapid technological developments, frequent new product introduction, unpredictable changes in growth rates and competition for the services of qualified personnel. Companies in the information technology sector are heavily dependent on patent and intellectual property rights. The loss or impairment of these rights may adversely affect the profitability of these companies. Information technology companies are facing increased government and regulatory scrutiny and may be subject to adverse government or regulatory action.

Large Capitalization Companies Risk.    Large capitalization companies may grow at a slower rate and be less able to adapt to changing market conditions than smaller capitalization companies. Thus, the return on investment in securities of large capitalization companies may be less than the return on investment in securities of small and/or mid capitalization companies. The performance of large capitalization companies also tends to trail the overall market during different market cycles.

Innovator Power Buffer Step-Up Strategy ETF | Cyber Security Risk [Member]  
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Cyber Security Risk.    As the use of Internet technology has become more prevalent in the course of business, the investment industry has become more susceptible to potential operational risks through breaches in cyber security. A breach in cyber security refers to both intentional and unintentional events that may cause the Fund to lose proprietary information, suffer data corruption or lose operational capacity. Such events could cause the Fund to incur regulatory penalties, reputational damage, additional compliance costs associated with corrective measures and/or financial loss. Cyber security breaches may involve unauthorized access to the Fund’s digital information systems through “hacking” or malicious software coding, but may also result from outside attacks such as denial-of-service attacks through efforts to make network services unavailable to intended users. In addition, cyber security breaches of the Fund’s third-party service providers, such as its administrator, transfer agent, custodian, or issuers in which the Fund invests, can also subject the Fund to many of the same risks associated with direct cyber security breaches. The Fund has established risk management systems designed to reduce the risks associated with cyber security. However, there is no guarantee that such efforts will succeed, especially because the Fund does not directly control the cyber security systems of issuers or third-party service providers.

Innovator Power Buffer Step-Up Strategy ETF | Market Risk [Member]  
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Market Risk.    The Fund could lose money over short periods due to short-term market movements and over longer periods during more prolonged market downturns. Assets may decline in value due to factors affecting financial markets generally or particular asset classes or industries represented in the markets. The value of FLEX Options or other assets may also decline due to general market conditions, economic trends or events that are not specifically related to the issuer of the security or other asset, or due to factors that affect a particular issuer or issuers, country, group of countries, region, market, industry, group of industries, sector or asset class. During a general market downturn, multiple asset classes may be negatively affected. Changes in market conditions and interest rates will not have the same impact on all types of securities. Securities, including the Shares, are subject to market fluctuations and liquidity constraints that may be caused

by such factors as economic, political, or regulatory developments, changes in interest rates, and/or perceived trends in securities prices. Shares of the Fund could decline in value or underperform other investments. The value of Shares may also decline as a result of market conditions. Factors such as inflation, changes in interest rates, changes in regulatory requirements, bank failures, political climate deterioration or developments, armed conflicts, natural disasters or future health crises, may negatively impact market conditions, and cause a decrease in the value of Shares. Other unexpected political, regulatory and diplomatic events within the U.S. and abroad may affect investor and consumer confidence and may adversely impact financial markets and the broader economy. These events, and any other future events, may adversely affect the prices and liquidity of the Fund’s portfolio investments and could result in disruptions in the trading markets.

Innovator Power Buffer Step-Up Strategy ETF | Risks Associated with ETFs [Member]  
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Risks Associated with ETFs.    The Fund is an ETF, and therefore, as a result of an ETF’s structure, is subject to the following risks:

Authorized Participant Concentration Risk.    Only an authorized participant may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that may act as authorized participants on an agency basis (i.e., on behalf of other market participants). To the extent that authorized participants exit the business or are unable to proceed with orders for the issuance or redemption of Creation Units and no other authorized participant is able to step forward to fulfill the order, Shares may be more likely to trade at a premium or discount to NAV and possibly face trading halts and/or delisting, and the bid/ask spread (the difference between the price that someone is willing to pay for Shares at a specific point in time versus the price at which someone is willing to sell) on Shares may widen.

Cash Transactions Risk.    The Fund may effectuate all or a portion of the issuance and redemption of Creation Units for cash, rather than in-kind securities. As a result, an investment in the Fund may be less tax-efficient than an investment in an ETF that effectuates its Creation Units only on an in-kind basis. ETFs are able to make in-kind redemptions to avoid being taxed on gains on the distributed portfolio securities at the fund level. A fund that effects redemptions for cash may be required to sell portfolio securities in order to obtain the cash needed to distribute redemption proceeds and may be forced to recognize gains. The Fund intends to distribute gains that arise by virtue of the issuance and redemption of Creation Units being effectuated in cash to shareholders to avoid being taxed on this gain at the fund level and otherwise comply with special tax rules that apply to it. This may cause shareholders to be subject to tax on gains they would not otherwise be subject to, or at an earlier date than if they had made an investment in another ETF. Moreover, cash transactions may have to be

carried out over several days if the securities market is relatively illiquid and may involve considerable brokerage fees and taxes. These brokerage fees and taxes, which will be higher than if the Fund sold and redeemed its shares principally in-kind, will be passed on to those purchasing and redeeming Creation Units in the form of creation and redemption transaction fees. The Fund’s use of cash for creations and redemptions could also result in dilution to the Fund and increased transaction costs, which could negatively impact the Fund’s ability to achieve its investment objective.

Market Maker Risk.    If the Fund has lower average daily trading volumes, it may rely on a small number of third-party market makers to provide a market for the purchase and sale of Shares. Any trading halt or other problem relating to the trading activity of these market makers could result in a dramatic change in the spread between the Fund’s NAV and the price at which the Shares are trading on the Exchange, which could result in a decrease in the market price of the Shares. In addition, decisions by market makers or APs to reduce their role or step away from these activities in times of market stress could inhibit the effectiveness of the arbitrage process in maintaining the relationship between the underlying values of the Fund’s portfolio securities and the Fund’s market price. This reduced effectiveness could result in Shares trading at a discount to NAV and also in greater than normal intra-day bid-ask spreads for Shares.

Operational Risk.    The Fund is exposed to operational risks arising from a number of factors, including, but not limited to, human error in implementation of the Fund’s investment strategy, processing and communication errors, errors of the Fund’s service providers, counterparties or other third-parties, failed or inadequate processes and technology or systems failures. The Fund and its investment adviser and Sub-Adviser seek to reduce these operational risks through controls and procedures. However, these measures do not address every possible risk and may be inadequate to address these risks.

Premium/Discount Risk.    Shares trade on the Exchange at market prices rather than their NAV. The market price of Shares generally corresponds to movements in the Fund’s NAV as well as the relative supply and demand for Shares on the Exchange. The market price may be at, above (a premium) or below (a discount) the Fund’s NAV. Differences in market prices of Shares and the NAV per Share may be due, in large part, to the fact that supply and demand forces at work in the secondary trading market for Shares will be closely related to, but not identical to, the same forces influencing the prices of the Fund’s holdings trading individually or in the aggregate at any point in time. These differences can be especially pronounced during times of market volatility or stress. During these periods, the demand for Shares may decrease considerably and cause the market price of Shares to deviate, and in some cases deviate significantly, from the Fund’s NAV and the bid/ask spread on Shares may widen.

Trading Issues Risk.    Although Shares are listed for trading on the Exchange, there can be no assurance that an active trading market for Shares will develop or be maintained. Trading in Shares on the Exchange may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in Shares inadvisable. In addition, trading in Shares on the Exchange is subject to trading halts caused by extraordinary market volatility pursuant to the Exchange “circuit breaker” rules. Market makers are under no obligation to make a

market in the Shares, and authorized participants are not obligated to submit purchase or redemption orders for Creation Units. There can be no assurance that the requirements of the Exchange necessary to maintain the listing of the Fund will continue to be met or will remain unchanged.

Innovator Power Buffer Step-Up Strategy ETF | Tax Risk [Member]  
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Tax Risk.    The Fund has elected to be treated and intends to qualify each year as a regulated investment company (“RIC”) under Subchapter M of the Code. In order to be treated as a RIC, the Fund must meet certain income, diversification and distribution tests. If, in any year, the Fund fails to qualify as a RIC under the applicable tax laws, the Fund would be taxed as an ordinary corporation. The federal income tax treatment of certain aspects of the proposed operations of the Fund is not entirely clear, which could impact the Fund’s ability to qualify as a RIC. This includes the tax aspects of the Fund’s options strategy, its hedging strategy, the possible application of the “straddle” rules, and various loss limitation provisions of the Code. The Fund’s investments in offsetting positions with respect to the Underlying ETF may affect the character of gains or losses realized by the Fund under the Code’s “straddle” rules and may increase any short-term capital gains realized by the Fund. The Fund intends to treat any income it may derive from the FLEX Options as “qualifying income” under the provisions of the Code applicable to RICs. If the income is not qualifying income or the referenced asset is not appropriately treated as the issuer of the FLEX Options, the Fund could lose its own status as a RIC. To maintain its status as a RIC, the Fund must distribute, on an annual basis, at least 90% of its investment company taxable income for each taxable year. In addition, to avoid a non-deductible excise tax, the Fund must distribute on a calendar year basis 98% of its ordinary taxable income and 98.2% of its capital gain net income for each taxable year (plus 100% of any undistributed amounts for prior years). Separately, depending upon the circumstances, sales of its portfolio investments (including FLEX Options) to fund redemptions could cause the Fund to recognize income that the Fund is required to distribute to maintain the Fund’s RIC status and avoid the excise tax. Funding such distributions could require additional sales, which could require more distributions and affect the projected performance of the Fund. Alternatively, if the Fund only makes distributions to maintain its RIC status and becomes subject to the excise tax, that could also affect the projected performance of the Fund. In either case, the assets sold to fund redemptions, distributions or pay the excise tax will not be available to assist the Fund in meeting its target outcome. With respect to the RIC diversification test, identifying the issuer can depend on the terms and conditions of a given investment. There is no published Internal Revenue Service guidance or only limited case law on how to determine the “issuer” of certain derivatives that the Fund will enter into. Based upon language in the legislative history, the Fund intends to treat the issuer of the FLEX Options as the referenced asset, which, assuming the referenced asset qualifies as a RIC, would allow the Fund to qualify for special rules in the RIC diversification requirements. The FLEX Options included in the portfolio are exchange-traded options. Under Section 1256 of the Code, certain types of exchange-traded options are treated as if they were sold (i.e., “marked to market”) at the end of each year. The Fund does not believe that the positions held by the Fund will be subject to Section 1256, which means that the positions will not be marked to market. There is a risk that because the offsetting FLEX Options are being held by a single person that the IRS may take the position that the FLEX Options, viewed together, should be treated as a single instrument for federal tax purposes. The result of such a position would be that the Fund would fail the RIC diversification tests causing the RIC to be taxed as an ordinary corporation, unless certain cure rights based upon

reasonable cause may apply. The Fund has obtained an opinion of tax counsel that the FLEX Options should not be collapsed into a single instrument. However, such an opinion is not binding upon the IRS or the courts. In the event that a shareholder purchases Shares of the Fund before a distribution by the Fund, the entire distribution may be taxable to the shareholder even though a portion of the distribution effectively represents a return of the purchase price.

Innovator Power Buffer Step-Up Strategy ETF | Valuation Risk [Member]  
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Valuation Risk.    During periods of reduced market liquidity or in the absence of readily available market quotations for the holdings of the Fund, the valuation of the Fund’s FLEX Options will become more difficult. In market environments where there is reduced availability of reliable objective pricing data, the judgment of the Fund’s investment adviser in determining the fair value of the security may play a greater role. While such determinations may be made in good faith, it may nevertheless be more difficult for the Fund to accurately assign a daily value.

Innovator Uncapped Bitcoin 20 Floor ETF - Quarterly | Risk Lose Money [Member]  
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Risk [Text Block] You could lose money by investing in the Fund.
Innovator Uncapped Bitcoin 20 Floor ETF - Quarterly | Risk Not Insured Depository Institution [Member]  
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Risk [Text Block] An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency.
Innovator Uncapped Bitcoin 20 Floor ETF - Quarterly | Risk Nondiversified Status [Member]  
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Non-Diversification Risk.    The Fund is classified as a “non-diversified company” under the 1940 Act. As a result, the Fund is only limited as to the percentage of its assets which may be invested in the securities of any one issuer by the diversification requirements imposed by the Code. The Fund may invest a relatively high percentage of its assets in a limited number of issuers. As a result, the Fund may be more susceptible to a single adverse economic or regulatory occurrence affecting one or more of these issuers, experience increased volatility and be highly invested in certain issuers.

Innovator Uncapped Bitcoin 20 Floor ETF - Quarterly | Bitcoin Risk [Member]  
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Bitcoin Risk.    The Fund will have significant exposure to bitcoin by virtue of its FLEX Options. Accordingly, the Fund is subject to certain unique risks, detailed below:

Bitcoin Investing Risk.    The further development of the Bitcoin Network and the acceptance and use of bitcoin are subject to a variety of factors that are difficult to evaluate. The value of bitcoin has been, and may continue to be, substantially dependent on speculation. The slowing, stopping or reversing of the development of the Bitcoin Network or the acceptance of bitcoin may adversely affect the price of bitcoin. Bitcoin is subject to the risk of fraud, theft, manipulation or security failures, operational or other problems that impact the digital asset trading venues on which bitcoin trades. The Bitcoin Blockchain may contain flaws that can be exploited by hackers. A significant portion of bitcoin is held by a small number of holders sometimes referred to as “whales.” Transactions of these holders may influence the price of bitcoin The risks associated with bitcoin include the following:

•   Bitcoin is a new technological innovation with a limited history.    There is no assurance that usage of bitcoin will continue to grow. A contraction in use of bitcoin may result in increased volatility or a reduction in the price of bitcoin, which could adversely impact the value of the Fund.

•   The Fund’s investments are exposed to risks associated with the price of bitcoin, which is subject to numerous factors and risks.    The price of bitcoin is impacted by numerous factors, including:

ο Bitcoin is subject to the risk of fraud, theft, manipulation, security failures, or operational or other problems that impact the digital asset trading venues on which bitcoin trades;

ο The total and available supply of bitcoin, including the possibility that a small group of early bitcoin adopters, sometimes referred to as “whales”, hold a significant proportion of the bitcoin that has thus far been created and that sales of bitcoin by such large holders may influence and have the ability to manipulate the price of bitcoin;

ο Global bitcoin demand, which is influenced by the growth of retail merchants’ and commercial businesses’ acceptance of bitcoin as payment for goods and services, the security of online digital asset trading platforms and public bitcoin addresses that hold bitcoin, the perception that the use and holding of bitcoin is safe and secure, the lack of regulatory restrictions on their use, and the reputation regarding the use of bitcoin for illicit purposes;

ο The fact that bitcoin is not presently widely accepted as a medium of exchange, which may be due to a number of common impediments and/or disadvantages to adopting the Bitcoin Network as a payment network, including the slowness of transaction processing and finality, variability of transaction fees, and volatility of the price of bitcoin;

ο Global bitcoin supply, which is influenced by similar factors as global bitcoin demand, in addition to fiat currency (i.e., government currency not backed by an asset such as gold) needs by miners and taxpayers who may liquidate bitcoin holdings to meet tax obligations;

ο Investors’ expectations with respect to the rate of inflation of fiat currencies and deflation of bitcoin;

ο Foreign exchange rates between fiat currencies and digital assets such as bitcoin;

ο Interest rates;

ο The continued operation of digital asset trading platforms in the United States and foreign jurisdictions, including their regulatory status, trading and custody policies, and cyber security;

ο Investment and trading activities of large investors, including private and registered funds, that may directly or indirectly invest in bitcoin; ○ Regulatory measures, if any, that restrict the use of bitcoin as a form of payment or the purchase or sale of bitcoin, including measures that restrict the direct or indirect participation in the bitcoin market by financial institutions or the introduction of bitcoin instruments;

ο The maintenance and development of the open-source software protocol of the Bitcoin Network;

ο Increased competition from other digital assets, including new digital assets resulting from a “fork” of the Bitcoin Blockchain, wherein two distinct sets of users and miners run two different versions of a protocol;

ο Developments in the information technology sector;

ο Global or regional political, economic or financial events and situations;

ο Investor or Bitcoin Network participant sentiments on the value or utility of bitcoin; and

ο The dedication of mining power to the Bitcoin Network and the willingness of bitcoin miners to clear bitcoin transactions for relatively low fees.

Negative developments in any of these factors could adversely impact an investment in the Fund.

•   A decline in the adoption of bitcoin could negatively impact the performance of the Fund.    As a new asset and technological innovation, the bitcoin industry is subject to a high degree of uncertainty. The adoption of bitcoin will require growth in its usage for various applications that include retail and commercial payments, cross-border and remittance transactions, speculative investment and technical applications. Adoption of bitcoin will also require an accommodating regulatory environment. A lack of expansion in usage of bitcoin could adversely affect the instruments providing exposure to the price of bitcoin in which the Fund invests. In addition, there is no assurance that bitcoin will maintain its value over the long-term. The value of bitcoin is subject to risks related to its usage. Even if growth in bitcoin adoption occurs in the near or medium-term, there is no assurance that bitcoin usage will continue to grow over the long-term. A contraction in use of bitcoin may result in increased volatility or a reduction in the price of bitcoin, which would adversely impact the value of the Fund’s shares. The price of bitcoin has been, and may continue to be, substantially dependent on speculation. Recently, bitcoin has come under scrutiny for its environmental impact, specifically the amount of energy consumed by bitcoin miners. Some companies have indicated they will cease accepting bitcoin for certain kinds of purchases due to such environmental concerns. To the extent such concerns persist, the demand for bitcoin and the speed of its adoption could be suppressed.

•   Bitcoin trading prices are volatile, and shareholders could lose all or substantially all of their investment in the Fund.    Speculators and investors who seek to profit from trading and holding bitcoin generate a significant portion of bitcoin demand. Bitcoin speculation regarding future appreciation in the value of bitcoin may inflate and make more volatile the price of a bitcoin. As a result, bitcoin may be more likely to fluctuate in value due to changing investor confidence in future appreciation in the price of bitcoin. Notably, bitcoin has been prone to rapid price declines, including significant declines occurring in a single day, throughout its history. For example, on March 12, 2020, bitcoin spot prices dropped by more than -37% on March 12, 2020, due to rapidly growing concerns about the COVID-19 outbreak.

The price of bitcoin may be impacted by events in other parts of the blockchain and digital asset ecosystem, even if such events are not directly related to the security or utility of bitcoin or the Bitcoin Network. Such events may precipitate a significant decline in the price of bitcoin and the instruments the Fund uses to obtain exposure to the price of bitcoin.

For example, in May 2022, the TerraUSD stablecoin experienced a loss of confidence, resulting in a 98% drop by the end of the month from its intended $1.00 USD peg. The collapse in the price of TerraUSD had wide consequences for the entire blockchain and digital asset ecosystem. The drop in TerraUSD contributed to the collapse of crypto lending platforms Celsius and Voyager, as well as prominent crypto hedge fund Three Arrows Capital. Many digital assets were dragged down by the news, including bitcoin, which dropped from its then-recent high $47,062 in March 30, 2022, to $19,785 by June 30, 2022, a drop of more than 58%.

In November 2022, FTX Trading Ltd. (“FTX”), a major digital asset trading platform, filed for bankruptcy following a halt in customer withdrawals and allegations of mismanagement of customer assets. The announcement precipitated steep price drops across various digital assets, including Bitcoin, which lost more than 25% of its value in the immediate wake of the revelations.

On June 5, 2023, The SEC charged Binance Holdings Ltd. (“Binance”), which operates the largest crypto asset trading platform in the world, Binance.com; BAM Trading Services Inc., which, together with Binance, operates the crypto asset trading platform, Binance.US; and their founder, Changpeng Zhao, with a variety of securities law violations.

Future announcements and events related to bitcoin, the Bitcoin Network, other digital assets, NFTs, and digital asset firms, including digital asset trading platforms, lending platforms, hedge funds, market makers, and custodians, may significantly impact the prices of bitcoin and expose the Fund to significant risks.

• The Bitcoin Network and bitcoin face numerous challenges to gaining widespread adoption as an alternative Payment Network.    Bitcoin is not presently widely accepted as a medium of exchange may be due to a number of factors, including the slowness of transaction processing and finality, variability in transaction fees and volatility in bitcoin’s price. It is not clear that the Bitcoin Network or bitcoin can overcome these and other impediments, which could harm the long-term adoption of the Bitcoin Network and bitcoin as an alternative payment system, and thereby negatively impact the price of bitcoin. In addition, alternative public blockchains have been developed and may in the future develop that compete with the Bitcoin Network and may have significant advantages as alternative payment systems, including higher throughput, lower fees, faster settlement and finalization, and the ability to facilitate untraceable and/or privacy-shielded transactions through the use of zero-knowledge cryptography or other means. It is possible that these alternative public blockchains and their native crypto assets may be more successful than the Bitcoin Network and bitcoin in gaining adoption as an alternative payments system, which could limit the long-term adoption of the Bitcoin Network and bitcoin, thereby negatively impact the price of bitcoin. Furthermore, traditional payment systems may improve their own technical capabilities and offer faster settlement times, faster finalization and lower fees. This could make it more difficult for the Bitcoin Network and bitcoin to gain traction as an alternative payments system, which could limit the long-term adoption of the Bitcoin Network and bitcoin, and thereby negatively impact the price of bitcoin. Finally, one means by which the ecosystem surrounding the Bitcoin Network has attempted to mitigate concerns about the slowness of transaction processing

and finality and the variability of transaction fees has been through the development of so-called Layer 2 networks, including the “Lightning Network.” Layer 2 networks are separate blockchains built on top of “Layer 1” blockchains like the Bitcoin Network for the purpose of augmenting the throughput of the Layer 1 blockchain, and often, providing lower fees for transaction processing and faster settlement. Layer 2 blockchains introduce certain risks into the Bitcoin ecosystem that should be considered. For instance, Layer 2 blockchains are a relatively new and still developing technology. Technological issues - including hacks, bugs, or failures - could introduce risk or harm confidence in the Bitcoin ecosystem, which could negatively impact the price of bitcoin. In addition, users may choose to settle an increasing share of transactions on Layer 2 blockchains, which could negatively impact the transaction activity on, and the amount of fee revenue generated by, the Bitcoin Network itself, which could negatively impact the price of bitcoin. If these or other developments negatively impact the price of bitcoin, this could adversely affect the value of the Fund.

• Regulation of participants in the bitcoin ecosystem continues to evolve in both the U.S. and foreign jurisdictions, which may restrict the use of bitcoin or otherwise impact the demand for bitcoin.    As a technology, the Bitcoin Network is governed by its internal protocols and source code; however, the use by individuals or businesses of the Bitcoin Network and bitcoin may be subject to government regulation. Both domestic and foreign regulators and governments have increased focus on the use of the Bitcoin Network and bitcoin since 2013. Many digital asset platforms are unlicensed, unregulated, operate without extensive supervision by governmental authorities, and do not provide the public with significant information regarding their ownership structure, management team, corporate practices, cybersecurity, and regulatory compliance. In particular, those located outside the United States may be subject to significantly less stringent regulatory and compliance requirements in their local jurisdictions, and may take the position that they are not subject to laws and regulations that would apply to a national securities exchange or designated contract market in the United States, or may, as a practical matter, be beyond the ambit of U.S. regulators. As a result, trading activity on or reported by these digital asset platforms is generally significantly less regulated than trading in regulated U.S. securities and commodities markets, and may reflect behavior that would be prohibited in regulated U.S. trading venues. In the U.S., federal and certain state authorities have exercised jurisdiction over specific uses of the Bitcoin Network and bitcoin, typically in the context of money service business regulation. Some foreign regulators and governments have exercised similar regulatory oversight; however, other jurisdictions have determined that regulatory action was premature or that the use of the Bitcoin Network should be prohibited or limited for reasons such as incompatibility with capital controls or financial system risks. Bitcoin market disruptions and resulting governmental interventions are unpredictable, and may make bitcoin illegal altogether. Future foreign regulations and directives may conflict with those in the U.S., and such regulatory actions may restrict or make bitcoin illegal in foreign jurisdictions. Future regulations and directives may impact the demand for bitcoin, and may also affect the ability of digital asset trading platforms to operate and for other market participants to enter into bitcoin transactions. Currently, there is either a fragmentation of regulatory efforts or a general lack of regulation in U.S. and foreign markets. As a result of fragmented regulatory efforts or lack of regulation, individuals or groups may engage

in fraud of market manipulation. Further, the bitcoin market globally and in the United States is not subject to comparable regulatory guardrails as exist in regulated securities markets. Many bitcoin trading venues lack certain safeguards put in place by exchanges for more traditional assets to enhance the stability of trading on the exchanges and prevent “flash crashes,” such as limit-down circuit breakers. As a result, the prices of bitcoin on trading venues may be subject to larger and/or more frequent sudden declines than assets traded on more traditional exchanges. Tools to detect and deter fraudulent or manipulative trading activities such as market manipulation, front-running of trades, and wash-trading may not be available to or employed by digital asset platforms, or may not exist at all. Over the past several years, some digital asset platforms have been closed due to fraud and manipulative activity, business failure or security breaches. In many of these instances, the customers of such digital asset platforms were not compensated or made whole for the partial or complete losses of their account balances in such digital asset platforms. The closure or temporary shutdown of a digital asset platform used in calculating the value of the bitcoin could adversely affect the value of the Fund.

To the extent that future regulatory actions or policies limit or restrict bitcoin usage, bitcoin trading or the ability to convert bitcoin to fiat currencies, the demand for bitcoin may be reduced, which may adversely affect investment in the Fund’s shares. Regulation of bitcoin continues to evolve, the ultimate impact of which remains unclear and may adversely affect, among other things, the availability, value or performance of bitcoin and, thus, the instruments in which the Fund invests. Moreover, in addition to exposing the Fund to potential new costs and expenses, additional regulation or changes to existing regulation may also require changes to the Fund’s investment strategies. Although there continues to be uncertainty about the full impact of these and other regulatory changes, it is the case that the Fund may be subject to a more complex regulatory framework, and incur additional costs to comply with new requirements as well as to monitor for compliance with any new requirements going forward.

• Disruptions at digital asset trading platforms and potential consequences of a digital asset trading platform’s failure could adversely affect an investment in the Fund.    Digital asset trading platforms operate websites on which users can trade bitcoin for U.S. dollars, other government currencies or other digital assets. Trades on digital asset trading platforms are unrelated to transfers of bitcoin between users via the Bitcoin Network. Bitcoin trades on digital asset trading platforms are recorded on the digital asset trading platform’s internal ledger only, and each internal ledger entry for a trade will correspond to an entry for an offsetting trade in U.S. dollars, other government currency or other digital asset. Digital asset trading platforms have a limited history, and during this limited history, bitcoin prices on the digital asset markets generally, and on digital asset platforms individually, have been volatile and subject to influence by many factors, including operational interruptions. Unlike exchanges for more traditional assets, such as equity securities and futures contracts, bitcoin and digital asset trading venues are largely unregulated, may be operating out of compliance with regulation and are highly fragmented. As a result, individuals or groups may engage in fraud or market manipulation. Since 2009, several digital asset trading platforms have been closed or experienced disruptions due to fraud, failure, security breaches or distributed denial of service attacks a/k/a “DDoS

Attacks.” A DDoS attack is a malicious attempt to disrupt the normal traffic of network by overwhelming the target or its infrastructure with a flood of internet traffic. In many of these instances, the customers of such exchanges were not compensated or made whole for the partial or complete losses of their funds held at the exchanges. In 2014, the largest digital asset trading platform at the time, Mt. Gox, filed for bankruptcy in Japan amid reports the exchange lost up to 850,000 bitcoin, then valued then at over $450 million. Digital asset trading platforms are also appealing targets for hackers and malware. In August 2016, Bitfinex, a digital asset trading platform located in Hong Kong, reported a security breach that resulted in the theft of approximately 120,000 bitcoin valued at the time at approximately $65 million, a loss which was socialized and allocated to all Bitfinex account holders, regardless of whether the account holder held bitcoin or cash in their account. In November 2022, FTX Trading Ltd. (“FTX”), a major digital asset trading platform, filed for bankruptcy following a halt in customer withdrawals. The potential for instability of digital asset trading platforms and the closure or temporary shutdown of exchanges due to fraud, business failure, hackers, DDoS or malware, or government-mandated regulation may reduce confidence in bitcoin, which may result in greater volatility in bitcoin.

• Bitcoin Network development contributors could propose amendments to the Bitcoin Network’s protocols and software that, if accepted and authorized by large groups of Bitcoin Network users, could adversely affect an investment in the Fund.    The Bitcoin Network is an open-source project meaning that any developer or computer scientist may review, propose changes to and develop software clients for the Bitcoin Network protocols. Although a small group of individuals referred to as the Core Developers previously exercised significant influence over the direction of Bitcoin Network development, no single party or group controls what refinements or improvements to the Bitcoin Network’s source code are proposed, approved or produced as upgrades or new software clients for Bitcoin Network users. A software update or new software client may alter the protocols and software that govern the Bitcoin Network and the properties of bitcoin, including the irreversibility of transactions and limitations on the mining of new bitcoin. When a modification is introduced and a substantial majority of users and miners consent to the modification, the change is implemented, and the Bitcoin Network remains uninterrupted. However, if less than a substantial majority of users and miners consent to the proposed modification, and the modification is not compatible with the software prior to its modification, the consequence would be what is known as a “fork” (i.e., “split”) of the Bitcoin Network (and the Blockchain), with one prong running the pre-modified software and the other running the modified software. The effect of such a fork would be the existence of two versions of the Bitcoin Network running in parallel, but with each version’s underlying asset and blockchain lacking interchangeability. Additionally, a fork could be introduced by an unintentional, unanticipated software flaw in the multiple versions of otherwise compatible software users run. Although several chain forks have been addressed by community-led efforts to merge the two chains, such a fork could adversely affect Bitcoin’s viability. It is possible, however, that a substantial number of Bitcoin users and miners could adopt an incompatible version of Bitcoin while resisting community-led efforts to merge the two chains. This would result in a permanent fork. On August 1, 2017, after 7 extended debates among developers as to how to improve the Bitcoin network’s transaction

capacity, the Bitcoin network was forked by a group of developers and miners resulting in the creation of a new blockchain, which underlies the new digital asset “Bitcoin Cash” alongside the original Bitcoin Blockchain. Bitcoin and Bitcoin Cash now operate on separate, independent blockchains. Although the Bitcoin Network remained unchanged after the fork, it is unclear how such actions will affect the long-term viability of bitcoin and, accordingly, may adversely affect an investment in the Fund.

•   The Bitcoin Network may be vulnerable to attacks to the extent a malicious actor, or group of malicious actors, were to gain control of more than 50% of the mining power in the network.    A malicious actor may attack the Bitcoin Network in a number of ways, including a “50 Percent Attack” or a spam attack. If a malicious actor obtains a majority of the processing power (referred to herein as “aggregate hashrate”) dedicated to mining on the Bitcoin Network, it will be able to exert unilateral control over the addition of blocks to the Blockchain. As long as the malicious actor enjoys this majority it may be able to “double-spend” its own bitcoin (i.e., spend the same bitcoin in two or more conflicting transactions) as well as prevent the confirmation of other Bitcoin transactions. If such a scenario were to materialize, it could adversely affect an investment in the Fund. More simply, a malicious actor could attempt to flood the pool of unconfirmed transactions (known as the “mempool”) with tens of thousands of transactions in an effort to significantly slow the confirmation of legitimate transactions across the Bitcoin Network. Such a delay, if sustained for extended periods of time, could negatively impact the secondary market price of Bitcoin. These or any other form of attack on the Bitcoin Network could adversely affect an investment the instruments providing exposure to the price of bitcoin in which the Fund invests.

•   The Bitcoin Blockchain may contain flaws that can be exploited by malicious actors.    In the past, flaws in the source code for digital assets have been exposed and exploited, including flaws that disabled some functionality for users, exposed users’ personal information and/or resulted in the theft of users’ digital assets. The cryptography underlying bitcoin could prove to be flawed or ineffective, or developments in mathematics and/or technology, including advances in digital computing, algebraic geometry and quantum computing, could result in such cryptography becoming ineffective. In any of these circumstances, a malicious actor may be able to compromise the security of the Bitcoin Network, which would adversely affect the value of the Fund. Moreover, functionality of the Bitcoin Network may be negatively affected such that it is no longer attractive to users, thereby dampening demand for bitcoin. Even if another digital asset other than bitcoin were affected by similar circumstances, any reduction in confidence in the source code or cryptography underlying digital assets generally could negatively affect the demand for digital assets and therefore adversely affect the value of the Fund.

Bitcoin ETP Index Risk.    The Fund obtains exposure to the Bitcoin Price indirectly through investments in FLEX Options that reference the Bitcoin ETP Index, which is comprised of Bitcoin ETPs. Bitcoin ETPs are exchange-traded investment products not registered under the 1940 Act that seek to match the daily changes in the price of bitcoin, before the payment of its fees and expenses, and trade intra-day on a national securities exchange. Shares of Bitcoin ETPs are not traded at NAV, but may trade at prices above or below the value of their underlying portfolios. The level of risk involved in the purchase or sale FLEX Options that reference

Bitcoin ETPs is similar to the risk involved in the purchase or sale of an exchange-traded fund, and generally reflect the risks of owning the underlying bitcoin and cash that the Bitcoin ETPs hold.

Bitcoin ETPs generally determine the price of bitcoin by reference to a benchmark rate or index. Since the Fund uses Bitcoin ETPs to get its exposure to the price of bitcoin, the risk exists that the Bitcoin Price will not track the global price of bitcoin, or the price of bitcoin on any one digital asset trading platform.  In the event the Bitcoin Price deviates from the global price of bitcoin, the Fund’s sought-after Outcomes will likely deviate from the returns of the price of bitcoin.

Additionally, the Fund may be subject to additional risks associated with the calculation of the Bitcoin ETP Index. Specifically, there is no assurance that the index provider of the Bitcoin ETP Index will compile the Bitcoin ETP Index accurately, or that the Bitcoin Index ETP will be determined, composed or calculated accurately. There is no guarantee that the Bitcoin ETP Index will operate in line with its methodology and the returns of the Bitcoin ETP Index may not accurately reflect the returns of bitcoin.

Innovator Uncapped Bitcoin 20 Floor ETF - Quarterly | Investment Strategy Risk [Member]  
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Investment Strategy Risk.    The Fund’s investment strategy subjects it to certain unique risks, which are detailed below.

Floor Risk.    There can be no guarantee that the Fund will be successful in its strategy to provide a maximum loss experienced by the Bitcoin Price of 20% over the duration of the Outcome Period. The Fund does not provide principal protection or non-principal protection, and an investor may experience significant losses on its investment, including the loss of its entire investment. The Fund’s strategy seeks to participate in a percentage of gains of the Bitcoin Price over the duration of the Outcome Period, while providing a maximum loss of experienced by the Bitcoin Price of 20% over successive three-month periods, if Shares are bought on the first day of the Outcome Period and held until its conclusion. The Floor is inclusive of interest income received by the Fund’s U.S. Treasuries, which is distributed to shareholders periodically. To the extent such interest income is not received by the Fund or the US. Treasuries decrease in value, shareholders will receive less than the sought-after protection provided by the Floor.

Participation Rate Risk.    The Fund’s strategy seeks to provide returns that are subject to the Participation Rate. In the event that the Bitcoin Price experiences gains, the Fund will not participate in any such gains beyond the Participation Rate. The Fund’s strategy seeks to deliver the Outcomes if Shares are held at the time at which the Fund enters into the FLEX Options and held until those FLEX Options expire at the end of the Outcome Period. In the event an investor purchases Shares after the FLEX Options were entered into or sells Shares prior to the expiration of the FLEX Options, there may be little or no ability for that investor to experience an investment gain on their Shares. In addition, because the Fund is designed to achieve Outcomes that change for each three-month Outcome Period, the Outcomes that are achieved by the Fund for a three-month Outcome Period will be different than the Outcomes achieved by the Fund over multiple Outcome Periods, or on an annualized basis. Similarly, investors holding Shares over multiple Outcome Periods will experience different investment results than holding a fund that has a longer Outcome Period (e.g., one year).

Outcome Period Risk.    The Fund’s investment strategy is designed to deliver the Outcomes if Shares are held for the entirety of the Outcome Period. In the event an investor purchases Shares after the FLEX Options were entered into or sells Shares prior to the expiration of the FLEX Options, the returns realized by the investor will not match those that the Fund seeks to provide. In addition, because the Fund is designed to achieve Outcomes that change for each three-month Outcome Period, the Outcomes that are achieved by the Fund for a three-month Outcome Period will be different than the Outcomes achieved by the Fund over multiple Outcome Periods, or on an annualized basis. Similarly, investors holding Shares over multiple Outcome Periods will experience different investment results than holding a fund that has a longer Outcome Period (e.g., one year) and any losses for such holders could exceed the performance for a fund with a longer Outcome Period.

Upside Participation Risk.    There can be no guarantee that the Fund will be successful in its strategy to provide shareholders with a total return that participates in a percentage of the positive returns of the Bitcoin Price over the Outcome Period. Additionally, the Fund will not participate in any returns that exceed the Participation Rate over the Outcome Period, which will cause the Fund to underperform the Bitcoin Price. In the event an investor purchases Shares after the FLEX Options were entered into or does not stay invested in the Fund for the entirety of the Outcome Period, the returns realized by such investor may not match those that the Fund seeks to achieve. The Participation Rate is dependent upon market conditions at the commencement of the Outcome Period. In certain market conditions, the Participation Rate may be lower and cause the Fund to forgo additional returns of the Bitcoin Price over the course of an Outcome Period.

Participation Rate Change Risk.    A new Participation Rate is established at the beginning of each Outcome Period and is dependent on prevailing market conditions at the time the Participation Rate is established. As such, the Participation Rate may rise or fall from one Outcome Period to the next and is unlikely to remain the same for consecutive Outcome Periods.

Concentration Risk.    Through its usage of FLEX Options, the Fund may invest more than 25% of its total assets in investments that provide exposure to the Bitcoin Price. To the extent the Fund has significant exposure in a single asset class or the securities of issuers within the same country, state, region, industry or sector, an adverse economic, business or political development may affect the value of the Fund’s investments more than if the Fund were more broadly diversified. A significant exposure makes the Fund more susceptible to any single occurrence and may subject the Fund to greater market risk than a fund that is more broadly diversified.

Investment Objective Risk.    Certain circumstances under which the Fund might not achieve its objective include, but are not limited, to (i) if the Fund disposes of FLEX Options, (ii) if the Fund is unable to maintain the proportional relationship based on the number of FLEX Options in the Fund’s portfolio, (iii) a significant accrual of Fund expenses in connection with effecting the Fund’s principal investment strategy or (iv) adverse tax law changes or interpretations affecting the treatment of FLEX Options.

Management Risk.    The Fund is subject to management risk because it is an actively managed portfolio. The Sub-Adviser applies investment techniques and risk analyses in making investment decisions for the Fund, but there can be no guarantee that the Fund will meet its investment objective.

U.S. Treasury Security Risk.    A security backed by the U.S. Treasury or the full faith and credit of the United States is guaranteed only as to the timely payment of interest and principal when held to maturity, but the market prices for such securities are not guaranteed and will fluctuate. Because U.S. Treasury Securities trade actively outside the United States, their prices may rise and fall as changes in global economic conditions affect the demand for these securities. U.S. Treasury securities may differ from other securities in their interest rates, maturities, times of issuance and other characteristics, and may provide relatively lower returns than those of other securities. Similar to other issuers, changes to the financial condition or credit rating of the U.S. government may cause the value of the Fund’s U.S. Treasury securities to decline. U.S. Treasury securities are subject to interest rate risk, but generally do not involve the credit risks associated with investments in other types of debt securities. As a result, the yields available from U.S. government securities are generally lower than the yields available from other debt securities. U.S. Treasury securities are guaranteed only as to the timely payment of interest and payment of principal when held to maturity.

Interest Rate Risk.    Interest rate risk is the risk that the value of the debt securities in the Fund’s portfolio will decline because of rising market interest rates. Interest rate risk is generally lower for shorter term debt securities and higher for longer-term debt securities. Duration is a reasonably accurate measure of a debt security’s price sensitivity to changes in interest rates and a common measure of interest rate risk. Duration measures a debt security’s expected life on a present value basis, taking into account the debt security’s yield, interest payments and final maturity. In general, duration represents the expected percentage change in the value of a security for an immediate 1% change in interest rates. For example, the price of a debt security with a three-year duration would be expected to drop by approximately 3% in response to a 1% increase in interest rates. Therefore, prices of debt securities with shorter durations tend to be less sensitive to interest rate changes than debt securities with longer durations. As the value of a debt security changes over time, so will its duration.

Innovator Uncapped Bitcoin 20 Floor ETF - Quarterly | Derivatives Risk [Member]  
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Derivatives Risk.    To employ the Fund’s defined outcome strategy, the Fund utilizes derivative instruments, specifically, FLEX Options. The use of derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities and other traditional investments. These risks include: (i) the risk that the counterparty to a derivative transaction may not fulfill its contractual obligations; (ii) risk of mispricing or improper valuation; and (iii) the risk that changes in the value of the derivative may not correlate perfectly with the underlying asset. Derivative prices are highly volatile and may fluctuate substantially during a short period of time. Such prices are influenced by numerous factors that affect the markets, including, but not limited to: changing supply and demand relationships; government programs and policies; national and international political and economic events, changes in interest rates, inflation and deflation and changes in supply and demand relationships. Trading derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in

securities. Derivative contracts ordinarily have leverage inherent in their terms, which can magnify potential for gain or loss and, therefore, amplify the effects of market volatility on share price. In addition to the foregoing, the Fund is subject to the following risks associated with its use of derivative instruments:

FLEX Options Risk.    The Fund will utilize FLEX Options, which are issued and guaranteed for settlement by the OCC. The Fund bears the risk that the OCC will be unable or unwilling to perform its obligations under the FLEX Options contracts. In the unlikely event that the OCC becomes insolvent or is otherwise unable to meet its settlement obligations, the Fund could suffer significant losses. Additionally, FLEX Options may be less liquid than certain other securities, such as standardized options. In less liquid markets for the FLEX Options, the Fund may have difficulty closing out certain FLEX Options positions at desired times and prices. In connection with the creation and redemption of Shares, to the extent market participants are not willing or able to enter into FLEX Option transactions with the Fund at prices that reflect the market price of the Shares, the Fund’s NAV and, in turn the share price of the Fund, could be negatively impacted.

The Fund may experience substantial downside from specific FLEX Option positions and certain FLEX Option positions may expire worthless. The FLEX Options held by the Fund are exercisable at the strike price on their expiration date. As a FLEX Option approaches its expiration date, its value typically increasingly moves with the value of the Bitcoin ETPs. However, prior to such date, the value of the FLEX Options does not increase or decrease at the same rate as the Bitcoin ETPs’ share price on a day-to-day basis (although they generally move in the same direction). The value of the FLEX Options held by the Fund will be determined based on market quotations or other recognized pricing methods. The value of the underlying FLEX Options will be affected by, among others, changes in the Bitcoin Price, changes in interest rates, changes in the actual and implied volatility of the Bitcoin ETPs and the remaining time to until the FLEX Options expire.

Option Contracts Risk.    The use of option contracts involves investment strategies and risks different from those associated with ordinary portfolio securities transactions. The prices of option contracts are volatile and are influenced by, among other things, actual and anticipated changes in the value of the underlying instrument, changes in interest or currency exchange rates, including the anticipated volatility, which are affected by fiscal and monetary policies and by national and international political, changes in the actual or implied volatility or the reference asset, the time remaining until the expiration of the option contract and economic events. There may at times be an imperfect correlation between the movement in values option contracts and the reference asset, and there may at times not be a liquid secondary market for certain option contracts.  The Fund has taken the necessary steps to comply with the requirements of Rule 18f-4 under the 1940 Act (“Rule 18f-4”) in its usage of FLEX Options, including option contracts. The Fund has adopted and implements a derivatives risk management program that contains policies and procedures reasonably designed to manage the Fund’s derivatives risks, has appointed a derivatives risk manager who is responsible for administrating the derivatives risk management program, complies with outer limitations on risks relating to its derivatives transactions and carries out enhanced reporting to the Board, the

SEC and the public regarding its derivatives activities. To the extent the Fund is noncompliant with Rule 18f-4, the Fund may be required to adjust its investment portfolio which may, in turn, negatively impact the Fund’s ability to deliver the sought-after Outcomes.

Clearing Member Default Risk.    Transactions in some types of derivatives, including the FLEX Options, are required to be centrally cleared (“cleared derivatives”). In a transaction involving cleared derivatives, the Fund’s counterparty is a clearing house, such as the OCC, rather than a bank or broker. Since the Fund is not a member of clearing houses and only members of a clearing house (“clearing members”) can participate directly in the clearing house, the Fund will hold cleared derivatives through accounts at clearing members. In cleared derivatives positions, the Fund will make payments (including margin payments) to, and receive payments from, a clearing house through their accounts at clearing members. Customer funds held at a clearing organization in connection with any option contracts are held in a commingled omnibus account and are not identified to the name of the clearing member’s individual customers. As a result, assets deposited by the Fund with any clearing member as margin for its FLEX Options may, in certain circumstances, be used to satisfy losses of other clients of the Fund’s clearing member. In addition, although clearing members guarantee performance of their clients’ obligations to the clearing house, there is a risk that the assets of the Fund might not be fully protected in the event of the clearing member’s bankruptcy. The Fund is also subject to the risk that a limited number of clearing members are willing to transact on the Fund’s behalf, which heightens the risks associated with a clearing member’s default. If a clearing member defaults the Fund could lose some or all of the benefits of a transaction entered into by the Fund with the clearing member. The loss of a clearing member for the Fund to transact with could result in increased transaction costs and other operational issues that could impede the Fund’s ability to implement its investment strategy. If the Fund cannot find a clearing member to transact with on the Fund’s behalf, the Fund may be unable to effectively implement its investment strategy.

Counterparty Risk.    Counterparty risk is the risk an issuer, guarantor or counterparty of a security in the Fund is unable or unwilling to meet its obligation on the security. Counterparty risk may arise because of the counterparty’s financial condition, market activities, or for other reasons. The Fund may be unable to recover its investment from the counterparty or may obtain a limited and/or delayed recovery. The OCC acts as guarantor and central counterparty with respect to the FLEX Options. As a result, the ability of the Fund to meet its objective depends on the OCC being able to meet its obligations. In the event an OCC clearing member that is a counterparty of the Fund were to become insolvent, the Fund may have some or all of its FLEX Options closed without its consent or may experience delays or other difficulties in attempting to close or exercise its affected FLEX Options positions, both of which would impair the Fund’s ability to deliver on its investment strategy. The OCC’s rules and procedures are designed to facilitate the prompt settlement of options transactions and exercises, including for clearing member insolvencies. However, there is the risk that the OCC and its backup system will fail if clearing member insolvencies are substantial or widespread. In the unlikely event that the OCC becomes insolvent or is otherwise unable to meet its settlement obligations, the Fund could suffer significant losses.

Position Limits Risk.    The options exchanges have established limits on the maximum number of puts and calls covering the same underlying security that may be held or written by a single investor or group of investors acting in concert or under common control (regardless of whether the options are purchased or written on the same or different exchanges or are held or written in one or more accounts or through one or more brokers). These are referred to as “position limits.” The position limit applicable to a particular option class is determined by the options exchange based on the number of shares outstanding and trading volume of the security underlying the option. The rules of the options markets generally limit the maximum number of options on the same side of the market (i.e., calls held plus puts written, or puts held plus calls written) with respect to a single underlying interest that may be carried in the accounts of a single investor or group of investors acting in concert. An options market may require that positions in certain FLEX Options be aggregated with positions in certain other options for purposes of calculating position limits.

The clearing members that clear the Fund’s listed option positions are required to monitor and report the Fund’s positions to the options exchanges and may be required to liquidate positions in excess of these limits. Failure to comply with position limits may result in the imposition of fines and other sanctions by the options exchanges.

To the extent the Fund needs to modify its holdings in FLEX Options, such modification may adversely affect the profitability of the Fund and prevent the Fund from achieving its investment objective. A violation of position limits could also lead to regulatory action materially adverse to a Fund’s investment strategy.

Correlation Risk.    The FLEX Options held by the Fund will be exercisable at the strike price only on their expiration date. As a FLEX Option approaches its expiration date, its value typically will increasingly move with the value of the Bitcoin Price. However, prior to the expiration date, the value of the FLEX Options may vary prior to the expiration date because of related factors other than the value of the Bitcoin Price. The value of the FLEX Options will be determined based upon market quotations or using other recognized pricing methods. Factors that may influence the value of the FLEX Options include interest rate changes and implied volatility levels of the Bitcoin Price, among others. The value of the FLEX Options held by the Fund typically do not increase or decrease at the same level as the Bitcoin Price on a day-to-day basis due to these factors (although they generally move in the same direction).

Liquidity Risk.    In the event that trading in FLEX Options is limited or absent, the value of the Fund’s FLEX Options may decrease. There is no guarantee that a liquid secondary trading market will exist for the FLEX Options. The trading in FLEX Options may be less deep and liquid than the market for certain other securities, including certain non-customized option contracts. In a less liquid market for the FLEX Options, terminating the FLEX Options may require the payment of a premium or acceptance of a discounted price and may take longer to complete. Additionally, the liquidation of a large number of FLEX Options may more significantly impact the price in a less liquid market. Further, the Fund requires a sufficient number of participants to facilitate the purchase and sale of options on an exchange to provide liquidity to the Fund for its FLEX Options positions. A less liquid trading market may adversely impact the value of the FLEX Options and the value of your investment.

Innovator Uncapped Bitcoin 20 Floor ETF - Quarterly | Cyber Security Risk [Member]  
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Cyber Security Risk.    As the use of Internet technology has become more prevalent in the course of business, the investment industry has become more susceptible to potential operational risks through breaches in cyber security. A breach in cyber security refers to both intentional and unintentional events that may cause the Fund to lose proprietary information, suffer data corruption or lose operational capacity. Such events could cause the Fund to incur regulatory penalties, reputational damage, additional compliance costs associated with corrective measures and/or financial loss. Cyber security breaches may involve unauthorized access to the Fund’s digital information systems through “hacking” or malicious software coding, but may also result from outside attacks such as denial-of-service attacks through efforts to make network services unavailable to intended users. In addition, cyber security breaches of the Fund’s third-party service providers, such as its administrator, transfer agent, or custodian can also subject the Fund to many of the same risks associated with direct cyber security breaches. The Fund has established risk management systems designed to reduce the risks associated with cyber security. However, there is no guarantee that such efforts will succeed, especially because the Fund does not directly control the cyber security systems of issuers or third-party service providers.

Innovator Uncapped Bitcoin 20 Floor ETF - Quarterly | Market Risk [Member]  
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Market Risk.    The Fund could lose money over short periods due to short-term market movements and over longer periods during more prolonged market downturns. Assets may decline in value due to factors affecting financial markets generally or particular asset classes or industries represented in the markets. The value of assets may also decline due to general market conditions, economic trends or events that are not specifically related to the issuer of the security or other asset, or due to factors that affect a particular issuer or issuers, country, group of countries, region, market, industry, group of industries, sector or asset class. During a general market downturn, multiple asset classes may be negatively affected. Changes in market conditions and interest rates will not have the same impact on all types of securities. Securities, including the Shares, are subject to market fluctuations and liquidity constraints that may be caused by such factors as economic, political, or regulatory developments, changes in interest rates, and/or perceived trends in securities prices. Shares of the Fund could decline in value or underperform other investments. The value of Shares may also decline as a result of market conditions. Factors such as inflation, changes in interest rates, changes in regulatory requirements, bank failures, political climate deterioration or developments, armed conflicts, natural disasters or future health crises, may negatively impact market conditions, and cause a decrease in the value of Shares. Other unexpected political, regulatory and diplomatic events within the U.S. and abroad may affect investor and consumer confidence and may adversely impact financial markets and the broader economy. These events, and any other future events, may adversely affect the prices and liquidity of the Fund’s portfolio investments and could result in disruptions in the trading markets.

Innovator Uncapped Bitcoin 20 Floor ETF - Quarterly | Risks Associated with ETFs [Member]  
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Risks Associated with ETFs.    The Fund is an ETF, and therefore, as a result of an ETF’s structure, is subject to the following risks:

Authorized Participant Concentration Risk.    Only an authorized participant may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that may act as authorized participants on an agency basis (i.e., on behalf of other market participants). To the extent that authorized participants exit the business or are unable to proceed with orders for the issuance or redemption of Creation Units and no other authorized participant is able to step forward to fulfill the order, Shares may be more likely to trade at a premium or discount to NAV and possibly face trading halts and/or delisting, and the bid/ask spread (the difference between the price that someone is willing to pay for Shares at a specific point in time versus the price at which someone is willing to sell) on Shares may widen.

Cash Transactions Risk.    The Fund may effectuate all or a portion of the issuance and redemption of Creation Units for cash, rather than in-kind securities. As a result, an investment in the Fund may be less tax-efficient than an investment in an exchange-traded fund that effectuates its Creation Units only on an in-kind basis. Exchange-traded funds are able to make in-kind redemptions to avoid being taxed on gains on the distributed portfolio securities at the fund level. A fund that effects redemptions for cash may be required to sell portfolio securities in order to obtain the cash needed to distribute redemption proceeds and may be forced to recognize gains. The Fund intends to distribute gains that arise by virtue of the issuance and redemption of Creation Units being effectuated in cash to shareholders to avoid being taxed on this gain at the fund level and otherwise comply with special tax rules that apply to it. This may cause shareholders to be subject to tax on gains they would not otherwise be subject to, or at an earlier date than if they had made an investment in another exchange-traded fund. Moreover, cash transactions may have to be carried out over several days if the securities market is relatively illiquid and may involve considerable brokerage fees and taxes. These brokerage fees and taxes, which will be higher than if the Fund sold and redeemed its shares principally in-kind, will be passed on to those purchasing and redeeming Creation Units in the form of creation and redemption transaction fees. The Fund’s use of cash for creations and redemptions could also result in dilution to the Fund and increased transaction costs, which could negatively impact the Fund’s ability to achieve its investment objective.

Market Maker Risk.    If the Fund has lower average daily trading volumes, it may rely on a small number of third-party market makers to provide a market for the purchase and sale of Shares. Any trading halt or other problem relating to the trading activity of these market makers could result in a dramatic change in the spread between the Fund’s NAV and the price at which the Shares are trading on the Exchange, which could result in a decrease in the market price of the Shares. In addition, decisions by market makers or authorized participants to reduce their role or step away from these activities in times of market stress could inhibit the effectiveness of the arbitrage process in maintaining the relationship between the underlying values of the Fund’s portfolio securities and the Fund’s market price. This reduced effectiveness could result in Shares trading at a discount to NAV and in greater than normal intra-day bid-ask spreads for Shares.

Operational Risk.    The Fund is exposed to operational risks arising from a number of factors, including, but not limited to, human error in the calculation of the Participation Rate and/or Floor, processing and communication errors, errors of the Fund’s service providers, counterparties or other third-parties, failed or inadequate processes and technology or systems failures. The Fund and its Adviser and Sub-Adviser seek to reduce these operational risks through controls and procedures. However, these measures do not address every possible risk and may be inadequate to address these risks.

Premium/Discount Risk.    Shares trade on the Exchange at market prices rather than their NAV. The market price of Shares generally corresponds to movements in the Fund’s NAV as well as the relative supply and demand for Shares on the Exchange. The market price may be at, above (a premium) or below (a discount) the Fund’s NAV, which means that investors could receive less or pay more than the Fund’s NAV per Share when selling or purchasing Shares on the Exchange. Differences in market prices of Shares and the NAV per Share may be due, in large part, to the fact that supply and demand forces at work in the secondary trading market for Shares will be closely related to, but not identical to, the same forces influencing the prices of the Fund’s holdings trading individually or in the aggregate at any point in time. These differences can be especially pronounced during times of market volatility or stress. During these periods, the demand for Shares may decrease considerably and cause the market price of Shares to deviate, and in some cases deviate significantly, from the Fund’s NAV and the bid/ask spread on Shares may widen.

Trading Issues Risk.    Although Shares are listed for trading on the Exchange, there can be no assurance that an active trading market for Shares will develop or be maintained. Trading in Shares on the Exchange may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in Shares inadvisable. In addition, trading in Shares on the Exchange is subject to trading halts caused by extraordinary market volatility pursuant to the Exchange “circuit breaker” rules. Market makers are under no obligation to make a market in the Shares, and authorized participants are not obligated to submit purchase or redemption orders for Creation Units. There can be no assurance that the requirements of the Exchange necessary to maintain the listing of the Fund will continue to be met or will remain unchanged.

Innovator Uncapped Bitcoin 20 Floor ETF - Quarterly | Tax Risk [Member]  
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Tax Risk.    The Fund intends to elect and to qualify each year to be treated as a RIC under Subchapter M of the Code. In order to be treated as a RIC, the Fund must meet certain income, diversification and distribution tests. If, in any year, the Fund fails to qualify as a RIC under the applicable tax laws, the Fund would be taxed as an ordinary corporation. The federal income tax treatment of certain aspects of the proposed operations of the Fund are not entirely clear, which could impact the Fund’s ability to qualify as a RIC. This includes the tax aspects of the Fund’s options strategy, its hedging strategy, the possible application of the “straddle” rules, and various loss limitation provisions of the Code. The Fund’s investments in offsetting positions with respect to the Bitcoin ETPs may affect the character of gains or losses realized by the Fund under the Code’s “straddle” rules and may increase any short-term capital gains realized by the Fund, which is taxed as ordinary income when distributed to U.S. shareholders in a non-liquidating distribution.

To the extent the options held by the Fund are deemed to qualify as “Section 1256 contracts” under Section 1256 of the Code, gains and losses on such options will generally be treated as 60% long-term capital gains and 40% short-term capital gains, regardless of how long the Fund has held such options. Section 1256 contracts held by the Fund at the end of a taxable year are “marked to market” for income tax purposes, meaning that unrealized gains or losses are treated as though they were realized (and treated on the 60/40 basis described above). The Fund’s use of options categorized as Section 1256 contracts will increase the likelihood that the Fund will recognize short-term and long-term capital gains as such options do not benefit from the tax efficiencies generated by an ETF’s in-kind creation and redemption mechanism. That notwithstanding, certain options held by the Fund may not qualify as Section 1256 contracts, and disposition of such options will likely result in short-term or long-term capital gains or losses depending on the holding period. The Fund will be required to distribute substantially all of its net short term capital gain and will either distribute its net long term capital gain or notify the shareholders that the Fund is electing to pay tax on its long-term capital gains but that the shareholders will be required to include the long-term capital gains in income.

Innovator Uncapped Bitcoin 20 Floor ETF - Quarterly | Valuation Risk [Member]  
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Valuation Risk.    During periods of reduced market liquidity or in the absence of readily available market quotations for the holdings of the Fund, the valuation of the Fund’s FLEX Options will become more difficult. In market environments where there is reduced availability of reliable objective pricing data, the judgment of the Fund’s investment adviser in determining the fair value of the security may play a greater role. While such determinations may be made in good faith, it may nevertheless be more difficult for the Fund to accurately assign a daily value.

Innovator U.S. Equity 5 to 15 Buffer ETF - Quarterly | Risk Lose Money [Member]  
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Risk [Text Block] You could lose money by investing in the Fund.
Innovator U.S. Equity 5 to 15 Buffer ETF - Quarterly | Risk Not Insured Depository Institution [Member]  
Prospectus [Line Items]  
Risk [Text Block] An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency.
Innovator U.S. Equity 5 to 15 Buffer ETF - Quarterly | Risk Nondiversified Status [Member]  
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Non-Diversification Risk.    The Fund is classified as a “non-diversified company” under the 1940 Act. As a result, the Fund is only limited as to the percentage of its assets which may be invested in the securities of any one issuer by the diversification requirements imposed by the Internal Revenue Code of 1986, as amended (the “Code”). The Fund may invest a relatively high percentage of its assets in a limited number of issuers. As a result, the Fund may be more susceptible to a single adverse economic or regulatory occurrence affecting one or more of these issuers, experience increased volatility and be highly invested in certain issuers.

Innovator U.S. Equity 5 to 15 Buffer ETF - Quarterly | Defined Outcome Strategy Risk [Member]  
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Defined Outcome Strategy Risk.    The Fund, in employing a “defined outcome strategy” is subject to certain unique risks, which are detailed below.

Buffered Loss Risk.    There can be no guarantee that the Fund will be successful in its strategy to provide buffer protection against Underlying ETF losses if the Underlying ETF’s share price decreases between 5% and 15% over the duration of the Outcome Period. A shareholder may lose their entire investment. The Fund’s strategy seeks to provide the sought-after protection of the Buffer if Shares are held at the time at which the Fund enters into the FLEX Options and held until those FLEX Options expire at the end of the Outcome Period. In the event an investor purchases Shares after the FLEX Options were entered into or sells Shares prior to the expiration of the FLEX Options, the Buffer that the Fund seeks to provide may not be available. The Fund does not provide principal protection or non-principal protection, and an investor may experience significant losses on its investment, including the loss of its entire investment. An investor that holds Shares through multiple Outcome Periods will be unable to recapture losses from prior Outcome Periods because at the end of each Outcome Period, a new Buffer will be established based on the then-current price of the Underlying ETF and any losses experienced below the prior Buffer will be locked-in. Moreover, the quarterly imposition of a new Cap on future gains may make it difficult to recoup any losses from the prior Outcome Periods such that, over multiple Outcome Periods, the Fund may have losses that exceed those of the Underlying ETF. To the extent the Fund invests directly in the Underlying ETF, the Buffer will be provided after the consideration of dividends received, whereby the Fund has assumed an anticipated dividend rate, which is on the historical dividend rate of the Underlying ETF. This assumed dividend rate may be less than dividends actually received by the Fund for the Outcome Period, in which case shareholders may not receive the sought-after downside protection of the Buffer.

Cap Change Risk.    A new Cap is established at the beginning of each Outcome Period and is dependent on prevailing market conditions at the time the Cap is established. As such, the Cap may rise or fall from one Outcome Period to the next and is unlikely to remain the same for consecutive Outcome Periods.

Capped Upside Return Risk.    The Fund’s strategy seeks to provide returns that are subject to the Cap. In the event that the Underlying ETF experiences gains in excess of the Cap for the Outcome Period, the Fund will not participate in, and will underperform the Underlying ETF to the extent of, those gains beyond the Cap. The Fund’s strategy seeks to participate in the upside of the entirety of the Underlying ETF gains (subject to the Cap), if Shares are held at the time at which the Fund enters into the FLEX Options and held until those FLEX Options expire at the end of the Outcome Period. In the event an investor purchases Shares after the FLEX Options were entered into, there may be little or no ability for that investor to experience an investment gain on their Shares. Due to the size of the Buffer over each quarterly Outcome Period, the Fund expects its Cap to be lower relative to other “defined outcome products” with an annual outcome period and/or a lower buffer. Further, because the FLEX Options are designed to produce the sought-after returns on the last day of the Outcome Period, if an investor sells Shares prior to the expiration date of the FLEX Options such investor may sell at a point where the Fund’s performance does not match the performance of the Underlying ETF over the Outcome Period, and therefore may sell at a point where the Fund has underperformed the Underlying ETF, even if such gains do not exceed the Cap. The Fund seeks to actively

manage its portfolio such that any transaction fees incurred by the Fund in connection with the management of the Fund’s assets will not impact the Fund’s performance in seeking to provide upside exposure to the Underlying ETF or the Fund’s ability to experience returns that match the Cap, to the extent the returns of the Underlying ETF are equal to or greater than the Cap. However, it is not guaranteed that the Fund will be able to successfully manage its assets to contemplate the transaction fees incurred by the Fund to achieve the Outcomes sought by the Fund. An investor that holds Shares through multiple Outcome Periods may fail to experience gains comparable to those of the Underlying ETF over time because at the end of each Outcome Period, a new Cap will be established based on the then-current price of the Underlying ETF and any gains above the prior Cap will be forfeited. To the extent the Fund invests directly in the Underlying ETF, the Cap will be provided after the consideration of dividends received, whereby the Fund has assumed an anticipated dividend rate, which is on the historical dividend rate of the Underlying ETF. This assumed dividend rate may be less than dividends actually received by the Fund for the Outcome Period, in which case the Cap will be less than disclosed herein.

Investment Objective Risk.    Certain circumstances under which the Fund might not achieve its objective include, but are not limited, to (i) if the Fund disposes of FLEX Options, (ii) if the Fund is unable to maintain the proportional relationship based on the number of FLEX Options in the Fund’s portfolio, (iii) a significant accrual of Fund expenses in connection with effecting the Fund’s principal investment strategy or (iv) adverse tax law changes or interpretations affecting the treatment of FLEX Options. If these factors were to occur, the Fund may be unable to achieve its investment objective, and investors may not receive the Outcomes described herein. Finally, the Fund is also subject to management risk as an actively-managed fund, which may cause it not to achieve its investment objective.

Management Risk.    Defined outcome strategies are actively-managed and accordingly, the Fund is subject to management risk. The Sub-Adviser applies investment techniques and risk analyses in making investment decisions for the Fund, subject to the oversight of the Adviser, but there can be no guarantee that the Sub-Adviser will properly implement the Fund’s investment strategy and therefore the Fund may not achieve its investment objective or its sought-after Outcomes, or perform as well as similarly situated funds.

Outcome Period Risk.    The Fund’s investment strategy is designed to deliver returns that match those of the Underlying ETF if Shares are held from the time the Fund enters into the FLEX Options and held until those FLEX Options expire at the end of the Outcome Period. In the event an investor purchases Shares after the FLEX Options were entered into or sells Shares prior to the expiration of the FLEX Options, the returns realized by the investor will not match those that the Fund seeks to provide. An investor that holds Shares through multiple Outcome Periods may fail to experience gains comparable to those of the Underlying ETF over time because at the end of each Outcome Period, a new Cap will be established based on the then-current price of the Underlying ETF and any gains of the Underlying ETF above the prior Cap will be forfeited. In addition, because the Fund is designed to achieve Outcomes that change for each three-month Outcome Period, the Outcomes that are achieved by the Fund for a three-month Outcome Period will be different than the Outcomes achieved by the Fund over multiple Outcome Periods, or on an annualized basis. Similarly, investors holding Shares

over multiple Outcome Periods will experience different investment results than holding a fund that has a longer Outcome Period (e.g., one year) and any losses for such holders could exceed the performance for a fund with a longer Outcome Period.

Upside Participation Risk.    There can be no guarantee that the Fund will be successful in its strategy to provide shareholders with returns that match the increases in the price of the Underlying ETF over the Outcome Period, subject to a maximum return imposed by the Cap. In the event an investor purchases Shares after the FLEX Options were entered into or does not stay invested in the Fund for the entirety of the Outcome Period, the returns realized by such investor may not match those that the Fund seeks to achieve. The Fund is subject to a Cap which may be lower relative to other “defined outcome products” and, as a result, any positive investment returns delivered by the Fund may be lower in comparison to such products and to that of the Underlying ETF.

Innovator U.S. Equity 5 to 15 Buffer ETF - Quarterly | Derivatives Risk [Member]  
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Derivatives Risk.    To employ the Fund’s defined outcome strategy, the Fund utilizes FLEX Options, which are a type of derivative instrument. The use of derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities and other traditional investments. These risks include: (i) the risk that the counterparty to a derivative transaction may not fulfill its contractual obligations; (ii) risk of mispricing or improper valuation; and (iii) the risk that changes in the value of the derivative may not correlate perfectly with the underlying asset. Derivative prices are highly volatile and may fluctuate substantially during a short period of time. Such prices are influenced by numerous factors that affect the markets, including, but not limited to: (i) changing supply and demand relationships; (ii) government programs and policies; (iii) national and international political and economic events; (iv) changes in interest rates; (v) inflation and deflation; and (vi) changes in supply and demand relationships. Trading derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities. Derivative contracts ordinarily have leverage inherent in their terms, which can magnify potential for gain or loss and, therefore, amplify the effects of market volatility on share price. The Fund has taken the necessary steps to comply with the requirements of Rule 18f-4 under the 1940 Act (“Rule 18f-4”) in its usage of FLEX Options. The Fund has adopted and implements a derivatives risk management program that contains policies and procedures reasonably designed to manage the Fund’s derivatives risks, has appointed a derivatives risk manager who is responsible for administrating the derivatives risk management program, complies with outer limitations on risks relating to its derivatives transactions and carries out enhanced reporting to the Board, the SEC and the public regarding its derivatives activities. To the extent the Fund is noncompliant with Rule 18f-4, the Fund may be required to adjust its investment portfolio which may, in turn, negatively impact the Fund’s ability to deliver the sought-after Outcomes. In addition to the foregoing, the Fund is subject to the following risks associated with its use of derivative instruments:

Clearing Member Default Risk.    Transactions in some types of derivatives, including FLEX Options, are required to be centrally cleared (“cleared derivatives”). In a transaction involving cleared derivatives, the Fund’s counterparty is a clearing house, such as the OCC, rather than a bank or broker. Since the Fund is not a member of clearing houses and only members of a clearing house (“clearing members”) can participate directly in the clearing house, the Fund will hold cleared derivatives through accounts at clearing members. In cleared derivatives positions, the Fund will make payments (including margin payments) to, and receive payments from, a clearing house through their accounts at clearing members. Customer funds held at

a clearing organization in connection with any option contracts are held in a commingled omnibus account and are not identified to the name of the clearing member’s individual customers. As a result, assets deposited by the Fund with any clearing member as margin for its FLEX Options may, in certain circumstances, be used to satisfy losses of other clients of the Fund’s clearing member. In addition, although clearing members guarantee performance of their clients’ obligations to the clearing house, there is a risk that the assets of the Fund might not be fully protected in the event of the clearing member’s bankruptcy. The Fund is also subject to the risk that a limited number of clearing members are willing to transact on the Fund’s behalf, which heightens the risks associated with a clearing member’s default. If a clearing member defaults the Fund could lose some or all of the benefits of a transaction entered into by the Fund with the clearing member. The loss of a clearing member for the Fund to transact with could result in increased transaction costs and other operational issues that could impede the Fund’s ability to implement its investment strategy. If the Fund cannot find a clearing member to transact with on the Fund’s behalf, the Fund may be unable to effectively implement its investment strategy.

Correlation Risk.    The FLEX Options held by the Fund will be exercisable at the strike price only on their expiration date. As a FLEX Option approaches its expiration date, its value typically will increasingly move with the value of the Underlying ETF. However, the value of the FLEX Options may vary prior to the expiration date because of related factors other than the value of the Underlying ETF. The value of the FLEX Options will be determined based upon market quotations or using other recognized pricing methods. Factors that may influence the value of the FLEX Options include interest rate changes and implied volatility levels of the Underlying ETF, among others. The value of the FLEX Options held by the Fund typically do not increase or decrease at the same level as the Underlying ETF’s share price on a day-to-day basis due to these factors (although they generally move in the same direction).

Counterparty Risk.    Counterparty risk is the risk an issuer, guarantor or counterparty of a security in the Fund is unable or unwilling to meet its obligation on the security. Counterparty risk may arise because of the counterparty’s financial condition, market activities, or for other reasons. The Fund may be unable to recover its investment from the counterparty or may obtain a limited and/or delayed recovery. The OCC acts as guarantor and central counterparty with respect to the FLEX Options. As a result, the ability of the Fund to meet its objective depends on the OCC being able to meet its obligations. In the event an OCC clearing member that is a counterparty of the Fund were to become insolvent, the Fund may have some or all of its FLEX Options closed without its consent or may experience delays or other difficulties in attempting to close or exercise its affected FLEX Options positions, both of which would impair the Fund’s ability to deliver on its investment strategy. The OCC’s rules and procedures are designed to facilitate the prompt settlement of options transactions and exercises, including for clearing member insolvencies. However, there is the risk that the OCC and its backup system will fail if clearing member insolvencies are substantial or widespread. In the unlikely event that the OCC becomes insolvent or is otherwise unable to meet its settlement obligations, the Fund could suffer significant losses.

FLEX Options Risk.    The Fund will utilize FLEX Options issued and guaranteed for settlement by the OCC. The use of option contracts involves investment strategies and risks different from those associated with ordinary portfolio securities transactions. The prices of

option contracts are volatile and are influenced by, among other things, actual and anticipated changes in the value of the underlying instrument, changes in interest or currency exchange rates, including the anticipated volatility, which are affected by fiscal and monetary policies and by national and international political, changes in the actual or implied volatility or the reference asset, the time remaining until the expiration of the option contract and economic events. There may at times be an imperfect correlation between the movement in values option contracts and the reference asset, and there may at times not be a liquid secondary market for certain option contracts.

The Fund bears the risk that the OCC will be unable or unwilling to perform its obligations under the FLEX Options contracts. In the unlikely event that the OCC becomes insolvent or is otherwise unable to meet its settlement obligations, the Fund could suffer significant losses. Additionally, FLEX Options may be less liquid than certain other securities, such as standardized options. In less liquid markets for the FLEX Options, the Fund may have difficulty closing out certain FLEX Options positions at desired times and prices. In connection with the creation and redemption of Shares, to the extent market participants are not willing or able to enter into FLEX Option transactions with the Fund at prices that reflect the market price of the Shares, the Fund’s NAV and, in turn the share price of the Fund, could be negatively impacted.

The Fund may experience substantial downside from specific FLEX Option positions and certain FLEX Option positions may expire worthless. The FLEX Options held by the Fund are exercisable at the strike price on their expiration date. As a FLEX Option approaches its expiration date, its value typically increasingly moves with the value of the Underlying ETF. However, prior to such date, the value of the FLEX Options does not increase or decrease at the same rate as the Underlying ETF’s share price on a day-to-day basis (although they generally move in the same direction). The value of the FLEX Options held by the Fund will be determined based on market quotations or other recognized pricing methods. The value of the underlying FLEX Options will be affected by, among others, changes in the Underlying ETF’s share price, changes in interest rates, changes in the actual and implied volatility of the Underlying ETF and the remaining time to until the FLEX Options expire.

Liquidity Risk.    In the event that trading in the underlying FLEX Options is limited or absent, the value of the Fund’s FLEX Options may decrease. There is no guarantee that a liquid secondary trading market will exist for the FLEX Options. The trading in FLEX Options may be less deep and liquid than the market for certain other securities, including certain non-customized option contracts. In a less liquid market for the FLEX Options, terminating the FLEX Options may require the payment of a premium or acceptance of a discounted price and may take longer to complete. Additionally, the liquidation of a large number of FLEX Options may more significantly impact the price in a less liquid market. Further, the Fund requires a sufficient number of participants to facilitate the purchase and sale of options on an exchange to provide liquidity to the Fund for its FLEX Option positions. A less liquid trading market may adversely impact the value of the FLEX Options and the value of your investment.

Innovator U.S. Equity 5 to 15 Buffer ETF - Quarterly | Underlying ETF Risk [Member]  
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Underlying ETF Risk.    The Fund’s investment performance largely depends on the investment performance and associated risks of the Underlying ETF. The Underlying ETF is subject to many of the same structural risks as the Fund that are described in more detail herein (see “Risks Associated with ETFs” below). The Adviser expects to waive a portion of its management fee in an amount that equals to any acquired fund fees and expenses the Fund incurs as a result of any direct investment in the Underlying ETF. However, if the Adviser does not waive such expenses in the future, the Fund will bear its proportionate share of the Underlying ETF’s expenses, subjecting Fund shareholders to such expenses. Further, the risks of investing in an ETF also include the risks associated with the underlying investments held by the ETF. As such, the Fund may be subject to the following risks as a result of its exposure to the Underlying ETF (or the components thereof):

Equity Securities Risk.    Equity securities may decline in value because of declines in the price of a particular holding or the broad stock market. Such declines may relate directly to the issuer of a security or broader economic or market events, including changes in interest rates. The value of shares will fluctuate with changes in the value of the equity securities the Underlying ETF invests in.

Information Technology Companies Risk.    Information technology companies face intense competition, both domestically and internationally, which may have an adverse effect on profit margins. Like other technology companies, information technology companies may have limited product lines, markets, financial resources or personnel. The products of information technology companies may face obsolescence due to rapid technological developments, frequent new product introduction, unpredictable changes in growth rates and competition for the services of qualified personnel. Companies in the information technology sector are heavily dependent on patent and intellectual property rights. The loss or impairment of these rights may adversely affect the profitability of these companies. Information technology companies are facing increased government and regulatory scrutiny and may be subject to adverse government or regulatory action.

Large Capitalization Companies Risk.    Large capitalization companies may grow at a slower rate and be less able to adapt to changing market conditions than smaller capitalization companies. Thus, the return on investment in securities of large capitalization companies may be less than the return on investment in securities of small and/or mid capitalization companies. The performance of large capitalization companies also tends to trail the overall market during different market cycles.

Innovator U.S. Equity 5 to 15 Buffer ETF - Quarterly | Concentration Risk [Member]  
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Concentration Risk.    Through its exposure to the Underlying ETF, the Fund will concentrate in the securities of a particular industry or group of industries to the same extent as the Underlying ETF. To the extent the Fund has significant exposure in a single asset class or the securities of issuers within the same country, state, region, industry or sector, an adverse economic, business or political development may affect the value of the Fund’s investments more than if the Fund were more broadly diversified. A significant exposure makes the Fund more susceptible to any single occurrence and may subject the Fund to greater market risk than a fund that is more broadly diversified.

Innovator U.S. Equity 5 to 15 Buffer ETF - Quarterly | Cyber Security Risk [Member]  
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Cyber Security Risk.    As the use of Internet technology has become more prevalent in the course of business, the investment industry has become more susceptible to potential operational risks through breaches in cyber security. A breach in cyber security refers to both intentional and unintentional events that may cause the Fund to lose proprietary information, suffer data corruption or lose operational capacity. Such events could cause the Fund to incur regulatory penalties, reputational damage, additional compliance costs associated with corrective measures and/or financial loss. Cyber security breaches may involve unauthorized access to the Fund’s digital information systems through “hacking” or malicious software coding, but may also result from outside attacks such as denial-of-service attacks through efforts to make network services unavailable to intended users. In addition, cyber security breaches of the Fund’s third-party service providers, such as its administrator, transfer agent, or custodian can also subject the Fund to many of the same risks associated with direct cyber security breaches. The Fund has established risk management systems designed to reduce the risks associated with cyber security. However, there is no guarantee that such efforts will succeed, especially because the Fund does not directly control the cyber security systems of issuers or third-party service providers.

Innovator U.S. Equity 5 to 15 Buffer ETF - Quarterly | Market Risk [Member]  
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Market Risk.    The Fund could lose money over short periods due to short-term market movements and over longer periods during more prolonged market downturns. Assets may decline in value due to factors affecting financial markets generally or particular asset classes or industries represented in the markets. The value of FLEX Options or other assets may also decline due to general market conditions, economic trends or events that are not specifically related to the issuer of the security or other asset, or due to factors that affect a particular issuer or issuers, country, group of countries, region, market, industry, group of industries, sector or asset class. During a general market downturn, multiple asset classes may be negatively affected. Changes in market conditions and interest rates will not have the same impact on all types of securities. Securities, including the Shares, are subject to market fluctuations and liquidity constraints that may be caused by such factors as economic, political, or regulatory developments, changes in interest rates, and/or perceived trends in securities prices. Shares of the Fund could decline in value or underperform other investments. The value of Shares may also decline as a result of market conditions. Factors such as inflation, changes in interest rates, changes in regulatory requirements, bank failures, political climate deterioration or developments, armed conflicts, natural disasters or future health crises, may negatively impact market conditions, and cause a decrease in the value of Shares. Other unexpected political, regulatory and diplomatic events within the U.S. and abroad may affect investor and consumer confidence and may adversely impact financial markets and the broader economy. These events, and any other future events, may adversely affect the prices and liquidity of the Fund’s portfolio investments and could result in disruptions in the trading markets.

Innovator U.S. Equity 5 to 15 Buffer ETF - Quarterly | Risks Associated with ETFs [Member]  
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Risks Associated with ETFs.    The Fund is an ETF, and therefore, as a result of an ETF’s structure, is subject to the following risks:

Authorized Participant Concentration Risk.    Only an authorized participant may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that may act as authorized participants on an agency basis (i.e., on behalf of other market participants). To the extent that authorized participants exit the business or are unable to proceed with orders for the issuance or redemption of Creation Units and no other authorized participant is able to step forward to fulfill the order, Shares may be more likely to trade at a premium or discount to NAV and possibly face trading halts and/or delisting, and the bid/ask spread (the difference between the price that someone is willing to pay for Shares at a specific point in time versus the price at which someone is willing to sell) on Shares may widen.

Cash Transactions Risk.    The Fund may effectuate all or a portion of the issuance and redemption of Creation Units for cash, rather than in-kind securities. As a result, an investment in the Fund may be less tax-efficient than an investment in an ETF that effectuates its Creation Units only on an in-kind basis. ETFs are able to make in-kind redemptions to avoid being taxed on gains on the distributed portfolio securities at the fund level. A fund that effects redemptions for cash may be required to sell portfolio securities in order to obtain the cash needed to distribute redemption proceeds and may be forced to recognize gains. The Fund intends to distribute gains that arise by virtue of the issuance and redemption of Creation Units being effectuated in cash to shareholders to avoid being taxed on this gain at the fund level and otherwise comply with special tax rules that apply to it. This may cause shareholders to be subject to tax on gains they would not otherwise be subject to, or at an earlier date than if they had made an investment in another ETF. Moreover, cash transactions may have to be carried out over several days if the securities market is relatively illiquid and may involve considerable brokerage fees and taxes. These brokerage fees and taxes, which will be higher than if the Fund sold and redeemed its shares principally in-kind, will be passed on to those purchasing and redeeming Creation Units in the form of creation and redemption transaction fees. The Fund’s use of cash for creations and redemptions could also result in dilution to the Fund and increased transaction costs, which could negatively impact the Fund’s ability to achieve its investment objective.

Market Maker Risk.    If the Fund has lower average daily trading volumes, it may rely on a small number of third-party market makers to provide a market for the purchase and sale of Shares. Any trading halt or other problem relating to the trading activity of these market makers could result in a dramatic change in the spread between the Fund’s NAV and the price at which the Shares are trading on the Exchange, which could result in a decrease in the market price of the Shares. In addition, decisions by market makers or authorized participants to reduce their role or step away from these activities in times of market stress could inhibit the effectiveness of the arbitrage process in maintaining the relationship between the underlying values of the Fund’s portfolio securities and the Fund’s market price. This reduced effectiveness could result in Shares trading at a discount to NAV and in greater than normal intra-day bid-ask spreads for Shares.

Operational Risk.    The Fund is exposed to operational risks arising from a number of factors, including, but not limited to, human error in the calculation of the Cap, processing and communication errors, errors of the Fund’s service providers, counterparties or other third-parties, failed or inadequate processes and technology or systems failures. The Fund and its Adviser and Sub-Adviser seek to reduce these operational risks through controls and procedures. However, these measures do not address every possible risk and may be inadequate to address these risks.

Premium/Discount Risk.    Shares trade on the Exchange at market prices rather than their NAV. The market price of Shares generally corresponds to movements in the Fund’s NAV as well as the relative supply and demand for Shares on the Exchange. The market price may be at, above (a premium) or below (a discount) the Fund’s NAV. Differences in market prices of Shares and the NAV per Share may be due, in large part, to the fact that supply and demand forces at work in the secondary trading market for Shares will be closely related to, but not identical to, the same forces influencing the prices of the Fund’s holdings trading individually or in the aggregate at any point in time. These differences can be especially pronounced during times of market volatility or stress. During these periods, the demand for Shares may decrease considerably and cause the market price of Shares to deviate, and in some cases deviate significantly, from the Fund’s NAV and the bid/ask spread on Shares may widen.

Trading Issues Risk.    Although Shares are listed for trading on the Exchange, there can be no assurance that an active trading market for Shares will develop or be maintained. Trading in Shares on the Exchange may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in Shares inadvisable. In addition, trading in Shares on the Exchange is subject to trading halts caused by extraordinary market volatility pursuant to the Exchange “circuit breaker” rules. Market makers are under no obligation to make a market in the Shares, and authorized participants are not obligated to submit purchase or redemption orders for Creation Units. There can be no assurance that the requirements of the Exchange necessary to maintain the listing of the Fund will continue to be met or will remain unchanged.

Innovator U.S. Equity 5 to 15 Buffer ETF - Quarterly | Tax Risk [Member]  
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Risk [Text Block]

Tax Risk.    The Fund has elected to be treated and intends to qualify each year as a regulated investment company (“RIC”) under Subchapter M of the Code. In order to be treated as a RIC, the Fund must meet certain income, diversification and distribution tests. If, in any year, the Fund fails to qualify as a RIC under the applicable tax laws, the Fund would be taxed as an ordinary corporation. The federal income tax treatment of certain aspects of the proposed operations of the Fund is not entirely clear, which could impact the Fund’s ability to qualify as a RIC. This includes the tax aspects of the Fund’s options strategy, its hedging strategy, the possible application of the “straddle” rules, and various loss limitation provisions of the Code. The Fund’s investments in offsetting positions with respect to the Underlying ETF may affect the character of gains or losses realized by the Fund under the Code’s “straddle” rules and may increase any short-term capital gains realized by the Fund. The Fund intends to treat any income it may derive from the FLEX Options as “qualifying income” under the provisions of the Code applicable to RICs. If the income is not qualifying income or the referenced asset is not appropriately treated as the issuer of the FLEX Options, the Fund could lose its own status as a RIC. To maintain its status as a RIC, the

Fund must distribute, on an annual basis, at least 90% of its investment company taxable income for each taxable year. In addition, to avoid a non-deductible excise tax, the Fund must distribute on a calendar year basis 98% of its ordinary taxable income and 98.2% of its capital gain net income for each taxable year (plus 100% of any undistributed amounts for prior years). Separately, depending upon the circumstances, sales of its portfolio investments (including FLEX Options) to fund redemptions could cause the Fund to recognize income that the Fund is required to distribute to maintain the Fund’s RIC status and avoid the excise tax. Funding such distributions could require additional sales, which could require more distributions and affect the projected performance of the Fund. Alternatively, if the Fund only makes distributions to maintain its RIC status and becomes subject to the excise tax, that could also affect the projected performance of the Fund. In either case, the assets sold to fund redemptions, distributions or pay the excise tax will not be available to assist the Fund in meeting its target outcome. With respect to the RIC diversification test, identifying the issuer can depend on the terms and conditions of a given investment. There is no published Internal Revenue Service guidance or only limited case law on how to determine the “issuer” of certain derivatives that the Fund will enter into. Based upon language in the legislative history, the Fund intends to treat the issuer of the FLEX Options as the referenced asset, which, assuming the referenced asset qualifies as a RIC, would allow the Fund to qualify for special rules in the RIC diversification requirements. The FLEX Options included in the portfolio are exchange-traded options. Under Section 1256 of the Code, certain types of exchange-traded options are treated as if they were sold (i.e., “marked to market”) at the end of each year. The Fund does not believe that the positions held by the Fund will be subject to Section 1256, which means that the positions will not be marked to market. There is a risk that because the offsetting FLEX Options are being held by a single person that the IRS may take the position that the FLEX Options, viewed together, should be treated as a single instrument for federal tax purposes. The result of such a position would be that the Fund would fail the RIC diversification tests causing the RIC to be taxed as an ordinary corporation, unless certain cure rights based upon reasonable cause may apply. The Fund has obtained an opinion of tax counsel that the FLEX Options should not be collapsed into a single instrument. However, such an opinion is not binding upon the IRS or the courts. In the event that a shareholder purchases Shares of the Fund before a distribution by the Fund, the entire distribution may be taxable to the shareholder even though a portion of the distribution effectively represents a return of the purchase price.

Innovator U.S. Equity 5 to 15 Buffer ETF - Quarterly | Valuation Risk [Member]  
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Valuation Risk.    During periods of reduced market liquidity or in the absence of readily available market quotations for the holdings of the Fund, the valuation of the Fund’s FLEX Options will become more difficult. In market environments where there is reduced availability of reliable objective pricing data, the judgment of the Fund’s investment adviser in determining the fair value of the security may play a greater role. While such determinations may be made in good faith, it may nevertheless be more difficult for the Fund to accurately assign a daily value.

Innovator U.S. Equity 10 Buffer ETF - Quarterly | Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] You could lose money by investing in the Fund.
Innovator U.S. Equity 10 Buffer ETF - Quarterly | Risk Not Insured Depository Institution [Member]  
Prospectus [Line Items]  
Risk [Text Block] An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency.
Innovator U.S. Equity 10 Buffer ETF - Quarterly | Risk Nondiversified Status [Member]  
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Non-Diversification Risk.    The Fund is classified as a “non-diversified company” under the 1940 Act. As a result, the Fund is only limited as to the percentage of its assets which may be invested in the securities of any one issuer by the diversification requirements imposed by the Internal Revenue Code of 1986, as amended (the “Code”). The Fund may invest a relatively high percentage of its assets in a limited number of issuers. As a result, the Fund may be more susceptible to a single adverse economic or regulatory occurrence affecting one or more of these issuers, experience increased volatility and be highly invested in certain issuers.

Innovator U.S. Equity 10 Buffer ETF - Quarterly | Defined Outcome Strategy Risk [Member]  
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Risk [Text Block]

Defined Outcome Strategy Risk.    The Fund, in employing a “defined outcome strategy” is subject to certain unique risks, which are detailed below.

Buffered Loss Risk.    There can be no guarantee that the Fund will be successful in its strategy to provide buffer protection against Underlying ETF losses if the Underlying ETF’s share price decreases by 10% or less over the duration of the Outcome Period. A shareholder may lose their entire investment. The Fund’s strategy seeks to provide the sought-after protection of the Buffer if Shares are held at the time at which the Fund enters into the FLEX Options and held until those FLEX Options expire at the end of the Outcome Period. In the event an investor purchases Shares after the FLEX Options were entered into or sells Shares prior to the expiration of the FLEX Options, the Buffer that the Fund seeks to provide may not be available. The Fund does not provide principal protection or non-principal protection, and an investor may experience significant losses on its investment, including the loss of its entire investment. An investor that holds Shares through multiple Outcome Periods will be unable to recapture losses from prior Outcome Periods because at the end of each Outcome Period, a new Buffer will be established based on the then-current price of the Underlying ETF and any losses experienced below the prior Buffer will be locked-in. Moreover, the quarterly imposition of a new Cap on future gains may make it difficult to recoup any losses from the prior Outcome Periods such that, over multiple Outcome Periods, the Fund may have losses that exceed those of the Underlying ETF. To the extent the Fund invests directly in the Underlying ETF, the Buffer will be provided after the consideration of dividends received, whereby the Fund has assumed an anticipated dividend rate, which is on the historical dividend rate of the Underlying ETF. This assumed dividend rate may be less than dividends actually received by the Fund for the Outcome Period, in which case shareholders may not receive the sought-after downside protection of the Buffer.

Cap Change Risk.    A new Cap is established at the beginning of each Outcome Period and is dependent on prevailing market conditions at the time the Cap is established. As such, the Cap may rise or fall from one Outcome Period to the next and is unlikely to remain the same for consecutive Outcome Periods.

Capped Upside Return Risk.    The Fund’s strategy seeks to provide returns that are subject to the Cap. In the event that the Underlying ETF experiences gains in excess of the Cap for the Outcome Period, the Fund will not participate in, and will underperform the Underlying ETF to the extent of, those gains beyond the Cap. The Fund’s strategy seeks to participate in the upside of the entirety of the Underlying ETF gains (subject to the Cap), if Shares are held at the time at which the Fund enters into the FLEX Options and held until those FLEX Options expire at the end of the Outcome Period. In the event an investor purchases Shares after the FLEX Options were entered into, there may be little or no ability for that investor to experience an investment gain on their Shares. Due to the size of the Buffer over each quarterly Outcome Period, the Fund expects its Cap to be lower relative to other “defined outcome products” with an annual outcome period and/or a lower buffer. Further, because the FLEX Options are designed to produce the sought-after returns on the last day of the Outcome Period, if an investor sells Shares prior to the expiration date of the FLEX Options such investor may sell at a point where the Fund’s performance does not match the performance of the Underlying ETF over the Outcome Period, and therefore may sell at a point where the Fund has underperformed the Underlying ETF, even if such gains do not exceed the Cap. The Fund seeks to actively

manage its portfolio such that any transaction fees incurred by the Fund in connection with the management of the Fund’s assets will not impact the Fund’s performance in seeking to provide upside exposure to the Underlying ETF or the Fund’s ability to experience returns that match the Cap, to the extent the returns of the Underlying ETF are equal to or greater than the Cap. However, it is not guaranteed that the Fund will be able to successfully manage its assets to contemplate the transaction fees incurred by the Fund to achieve the Outcomes sought by the Fund. An investor that holds Shares through multiple Outcome Periods may fail to experience gains comparable to those of the Underlying ETF over time because at the end of each Outcome Period, a new Cap will be established based on the then-current price of the Underlying ETF and any gains above the prior Cap will be forfeited. To the extent the Fund invests directly in the Underlying ETF, the Cap will be provided after the consideration of dividends received, whereby the Fund has assumed an anticipated dividend rate, which is on the historical dividend rate of the Underlying ETF. This assumed dividend rate may be less than dividends actually received by the Fund for the Outcome Period, in which case the Cap will be less than disclosed herein.

Investment Objective Risk.    Certain circumstances under which the Fund might not achieve its objective include, but are not limited, to (i) if the Fund disposes of FLEX Options, (ii) if the Fund is unable to maintain the proportional relationship based on the number of FLEX Options in the Fund’s portfolio, (iii) a significant accrual of Fund expenses in connection with effecting the Fund’s principal investment strategy or (iv) adverse tax law changes or interpretations affecting the treatment of FLEX Options. If these factors were to occur, the Fund may be unable to achieve its investment objective, and investors may not receive the Outcomes described herein. Finally, the Fund is also subject to management risk as an actively-managed fund, which may cause it not to achieve its investment objective.

Management Risk.    Defined outcome strategies are actively-managed and accordingly, the Fund is subject to management risk. The Sub-Adviser applies investment techniques and risk analyses in making investment decisions for the Fund, subject to the oversight of the Adviser, but there can be no guarantee that the Sub-Adviser will properly implement the Fund’s investment strategy and therefore the Fund may not achieve its investment objective or its sought-after Outcomes, or perform as well as similarly situated funds.

Outcome Period Risk.    The Fund’s investment strategy is designed to deliver returns that match those of the Underlying ETF if Shares are held from the time the Fund enters into the FLEX Options and held until those FLEX Options expire at the end of the Outcome Period. In the event an investor purchases Shares after the FLEX Options were entered into or sells Shares prior to the expiration of the FLEX Options, the returns realized by the investor will not match those that the Fund seeks to provide. An investor that holds Shares through multiple Outcome Periods may fail to experience gains comparable to those of the Underlying ETF over time because at the end of each Outcome Period, a new Cap will be established based on the then-current price of the Underlying ETF and any gains of the Underlying ETF above the prior Cap will be forfeited. In addition, because the Fund is designed to achieve Outcomes that change for each three-month Outcome Period, the Outcomes that are achieved by the Fund for a three-month Outcome Period will be different than the Outcomes achieved by the Fund over multiple Outcome Periods, or on an annualized basis. Similarly, investors holding Shares

over multiple Outcome Periods will experience different investment results than holding a fund that has a longer Outcome Period (e.g., one year) and any losses for such holders could exceed the performance for a fund with a longer Outcome Period.

Upside Participation Risk.    There can be no guarantee that the Fund will be successful in its strategy to provide shareholders with returns that match the increases in the price of the Underlying ETF over the Outcome Period, subject to a maximum return imposed by the Cap. In the event an investor purchases Shares after the FLEX Options were entered into or does not stay invested in the Fund for the entirety of the Outcome Period, the returns realized by such investor may not match those that the Fund seeks to achieve. The Fund is subject to a Cap which may be lower relative to other “defined outcome products” and, as a result, any positive investment returns delivered by the Fund may be lower in comparison to such products and to that of the Underlying ETF.

Innovator U.S. Equity 10 Buffer ETF - Quarterly | Derivatives Risk [Member]  
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Derivatives Risk.    To employ the Fund’s defined outcome strategy, the Fund utilizes FLEX Options, which are a type of derivative instrument. The use of derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities and other traditional investments. These risks include: (i) the risk that the counterparty to a derivative transaction may not fulfill its contractual obligations; (ii) risk of mispricing or improper valuation; and (iii) the risk that changes in the value of the derivative may not correlate perfectly with the underlying asset. Derivative prices are highly volatile and may fluctuate substantially during a short period of time. Such prices are influenced by numerous factors that affect the markets, including, but not limited to: (i) changing supply and demand relationships; (ii) government programs and policies; (iii) national and international political and economic events; (iv) changes in interest rates; (v) inflation and deflation; and (vi) changes in supply and demand relationships. Trading derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities. Derivative contracts ordinarily have leverage inherent in their terms, which can magnify potential for gain or loss and, therefore, amplify the effects of market volatility on share price. The Fund has taken the necessary steps to comply with the requirements of Rule 18f-4 under the 1940 Act (“Rule 18f-4”) in its usage of FLEX Options. The Fund has adopted and implements a derivatives risk management program that contains policies and procedures reasonably designed to manage the Fund’s derivatives risks, has appointed a derivatives risk manager who is responsible for administrating the derivatives risk management program, complies with outer limitations on risks relating to its derivatives transactions and carries out enhanced reporting to the Board, the SEC and the public regarding its derivatives activities. To the extent the Fund is noncompliant with Rule 18f-4, the Fund may be required to adjust its investment portfolio which may, in turn, negatively impact the Fund’s ability to deliver the sought-after Outcomes. In addition to the foregoing, the Fund is subject to the following risks associated with its use of derivative instruments:

Clearing Member Default Risk.    Transactions in some types of derivatives, including FLEX Options, are required to be centrally cleared (“cleared derivatives”). In a transaction involving cleared derivatives, the Fund’s counterparty is a clearing house, such as the OCC, rather than a bank or broker. Since the Fund is not a member of clearing houses and only members of a clearing house (“clearing members”) can participate directly in the clearing house, the Fund will hold cleared derivatives through accounts at clearing members. In cleared derivatives positions, the Fund will make payments (including margin payments) to, and receive payments from, a clearing house through their accounts at clearing members. Customer funds held at

a clearing organization in connection with any option contracts are held in a commingled omnibus account and are not identified to the name of the clearing member’s individual customers. As a result, assets deposited by the Fund with any clearing member as margin for its FLEX Options may, in certain circumstances, be used to satisfy losses of other clients of the Fund’s clearing member. In addition, although clearing members guarantee performance of their clients’ obligations to the clearing house, there is a risk that the assets of the Fund might not be fully protected in the event of the clearing member’s bankruptcy. The Fund is also subject to the risk that a limited number of clearing members are willing to transact on the Fund’s behalf, which heightens the risks associated with a clearing member’s default. If a clearing member defaults the Fund could lose some or all of the benefits of a transaction entered into by the Fund with the clearing member. The loss of a clearing member for the Fund to transact with could result in increased transaction costs and other operational issues that could impede the Fund’s ability to implement its investment strategy. If the Fund cannot find a clearing member to transact with on the Fund’s behalf, the Fund may be unable to effectively implement its investment strategy.

Correlation Risk.    The FLEX Options held by the Fund will be exercisable at the strike price only on their expiration date. As a FLEX Option approaches its expiration date, its value typically will increasingly move with the value of the Underlying ETF. However, the value of the FLEX Options may vary prior to the expiration date because of related factors other than the value of the Underlying ETF. The value of the FLEX Options will be determined based upon market quotations or using other recognized pricing methods. Factors that may influence the value of the FLEX Options include interest rate changes and implied volatility levels of the Underlying ETF, among others. The value of the FLEX Options held by the Fund typically do not increase or decrease at the same level as the Underlying ETF’s share price on a day-to-day basis due to these factors (although they generally move in the same direction).

Counterparty Risk.    Counterparty risk is the risk an issuer, guarantor or counterparty of a security in the Fund is unable or unwilling to meet its obligation on the security. Counterparty risk may arise because of the counterparty’s financial condition, market activities, or for other reasons. The Fund may be unable to recover its investment from the counterparty or may obtain a limited and/or delayed recovery. The OCC acts as guarantor and central counterparty with respect to the FLEX Options. As a result, the ability of the Fund to meet its objective depends on the OCC being able to meet its obligations. In the event an OCC clearing member that is a counterparty of the Fund were to become insolvent, the Fund may have some or all of its FLEX Options closed without its consent or may experience delays or other difficulties in attempting to close or exercise its affected FLEX Options positions, both of which would impair the Fund’s ability to deliver on its investment strategy. The OCC’s rules and procedures are designed to facilitate the prompt settlement of options transactions and exercises, including for clearing member insolvencies. However, there is the risk that the OCC and its backup system will fail if clearing member insolvencies are substantial or widespread. In the unlikely event that the OCC becomes insolvent or is otherwise unable to meet its settlement obligations, the Fund could suffer significant losses.

FLEX Options Risk.    The Fund will utilize FLEX Options issued and guaranteed for settlement by the OCC. The use of option contracts involves investment strategies and risks different from those associated with ordinary portfolio securities transactions. The prices of

option contracts are volatile and are influenced by, among other things, actual and anticipated changes in the value of the underlying instrument, changes in interest or currency exchange rates, including the anticipated volatility, which are affected by fiscal and monetary policies and by national and international political, changes in the actual or implied volatility or the reference asset, the time remaining until the expiration of the option contract and economic events. There may at times be an imperfect correlation between the movement in values option contracts and the reference asset, and there may at times not be a liquid secondary market for certain option contracts.

The Fund bears the risk that the OCC will be unable or unwilling to perform its obligations under the FLEX Options contracts. In the unlikely event that the OCC becomes insolvent or is otherwise unable to meet its settlement obligations, the Fund could suffer significant losses. Additionally, FLEX Options may be less liquid than certain other securities, such as standardized options. In less liquid markets for the FLEX Options, the Fund may have difficulty closing out certain FLEX Options positions at desired times and prices. In connection with the creation and redemption of Shares, to the extent market participants are not willing or able to enter into FLEX Option transactions with the Fund at prices that reflect the market price of the Shares, the Fund’s NAV and, in turn the share price of the Fund, could be negatively impacted.

The Fund may experience substantial downside from specific FLEX Option positions and certain FLEX Option positions may expire worthless. The FLEX Options held by the Fund are exercisable at the strike price on their expiration date. As a FLEX Option approaches its expiration date, its value typically increasingly moves with the value of the Underlying ETF. However, prior to such date, the value of the FLEX Options does not increase or decrease at the same rate as the Underlying ETF’s share price on a day-to-day basis (although they generally move in the same direction). The value of the FLEX Options held by the Fund will be determined based on market quotations or other recognized pricing methods. The value of the underlying FLEX Options will be affected by, among others, changes in the Underlying ETF’s share price, changes in interest rates, changes in the actual and implied volatility of the Underlying ETF and the remaining time to until the FLEX Options expire.

Liquidity Risk.    In the event that trading in the underlying FLEX Options is limited or absent, the value of the Fund’s FLEX Options may decrease. There is no guarantee that a liquid secondary trading market will exist for the FLEX Options. The trading in FLEX Options may be less deep and liquid than the market for certain other securities, including certain non-customized option contracts. In a less liquid market for the FLEX Options, terminating the FLEX Options may require the payment of a premium or acceptance of a discounted price and may take longer to complete. Additionally, the liquidation of a large number of FLEX Options may more significantly impact the price in a less liquid market. Further, the Fund requires a sufficient number of participants to facilitate the purchase and sale of options on an exchange to provide liquidity to the Fund for its FLEX Option positions. A less liquid trading market may adversely impact the value of the FLEX Options and the value of your investment.

Innovator U.S. Equity 10 Buffer ETF - Quarterly | Underlying ETF Risk [Member]  
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Underlying ETF Risk.    The Fund’s investment performance largely depends on the investment performance and associated risks of the Underlying ETF. The Underlying ETF is subject to many of the same structural risks as the Fund that are described in more detail herein (see “Risks Associated with ETFs” below). The Adviser expects to waive a portion of its management fee in an amount that equals to any acquired fund fees and expenses the Fund incurs as a result of any direct investment in the Underlying ETF. However, if the Adviser does not waive such expenses in the future, the Fund will bear its proportionate share of the Underlying ETF’s expenses, subjecting Fund shareholders to such expenses. Further, the risks of investing in an ETF also include the risks associated with the underlying investments held by the ETF. As such, the Fund may be subject to the following risks as a result of its exposure to the Underlying ETF (or the components thereof):

Equity Securities Risk.    Equity securities may decline in value because of declines in the price of a particular holding or the broad stock market. Such declines may relate directly to the issuer of a security or broader economic or market events, including changes in interest rates. The value of shares will fluctuate with changes in the value of the equity securities the Underlying ETF invests in.

Information Technology Companies Risk.    Information technology companies face intense competition, both domestically and internationally, which may have an adverse effect on profit margins. Like other technology companies, information technology companies may have limited product lines, markets, financial resources or personnel. The products of information technology companies may face obsolescence due to rapid technological developments, frequent new product introduction, unpredictable changes in growth rates and competition for the services of qualified personnel. Companies in the information technology sector are heavily dependent on patent and intellectual property rights. The loss or impairment of these rights may adversely affect the profitability of these companies. Information technology companies are facing increased government and regulatory scrutiny and may be subject to adverse government or regulatory action.

Large Capitalization Companies Risk.    Large capitalization companies may grow at a slower rate and be less able to adapt to changing market conditions than smaller capitalization companies. Thus, the return on investment in securities of large capitalization companies may be less than the return on investment in securities of small and/or mid capitalization companies. The performance of large capitalization companies also tends to trail the overall market during different market cycles.

Innovator U.S. Equity 10 Buffer ETF - Quarterly | Concentration Risk [Member]  
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Concentration Risk.    Through its exposure to the Underlying ETF, the Fund will concentrate in the securities of a particular industry or group of industries to the same extent as the Underlying ETF. To the extent the Fund has significant exposure in a single asset class or the securities of issuers within the same country, state, region, industry or sector, an adverse economic, business or political development may affect the value of the Fund’s investments more than if the Fund were more broadly diversified. A significant exposure makes the Fund more susceptible to any single occurrence and may subject the Fund to greater market risk than a fund that is more broadly diversified.

Innovator U.S. Equity 10 Buffer ETF - Quarterly | Cyber Security Risk [Member]  
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Cyber Security Risk.    As the use of Internet technology has become more prevalent in the course of business, the investment industry has become more susceptible to potential operational risks through breaches in cyber security. A breach in cyber security refers to both intentional and unintentional events that may cause the Fund to lose proprietary information, suffer data corruption or lose operational capacity. Such events could cause the Fund to incur regulatory penalties, reputational damage, additional compliance costs associated with corrective measures and/or financial loss. Cyber security breaches may involve unauthorized access to the Fund’s digital information systems through “hacking” or malicious software coding, but may also result from outside attacks such as denial-of-service attacks through efforts to make network services unavailable to intended users. In addition, cyber security breaches of the Fund’s third-party service providers, such as its administrator, transfer agent, or custodian can also subject the Fund to many of the same risks associated with direct cyber security breaches. The Fund has established risk management systems designed to reduce the risks associated with cyber security. However, there is no guarantee that such efforts will succeed, especially because the Fund does not directly control the cyber security systems of issuers or third-party service providers.

Innovator U.S. Equity 10 Buffer ETF - Quarterly | Market Risk [Member]  
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Market Risk.    The Fund could lose money over short periods due to short-term market movements and over longer periods during more prolonged market downturns. Assets may decline in value due to factors affecting financial markets generally or particular asset classes or industries represented in the markets. The value of FLEX Options or other assets may also decline due to general market conditions, economic trends or events that are not specifically related to the issuer of the security or other asset, or due to factors that affect a particular issuer or issuers, country, group of countries, region, market, industry, group of industries, sector or asset class. During a general market downturn, multiple asset classes may be negatively affected. Changes in market conditions and interest rates will not have the same impact on all types of securities. Securities, including the Shares, are subject to market fluctuations and liquidity constraints that may be caused by such factors as economic, political, or regulatory developments, changes in interest rates, and/or perceived trends in securities prices. Shares of the Fund could decline in value or underperform other investments. The value of Shares may also decline as a result of market conditions. Factors such as inflation, changes in interest rates, changes in regulatory requirements, bank failures, political climate deterioration or developments, armed conflicts, natural disasters or future health crises, may negatively impact market conditions, and cause a decrease in the value of Shares. Other unexpected political, regulatory and diplomatic events within the U.S. and abroad may affect investor and consumer confidence and may adversely impact financial markets and the broader economy. These events, and any other future events, may adversely affect the prices and liquidity of the Fund’s portfolio investments and could result in disruptions in the trading markets.

Innovator U.S. Equity 10 Buffer ETF - Quarterly | Risks Associated with ETFs [Member]  
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Risks Associated with ETFs.    The Fund is an ETF, and therefore, as a result of an ETF’s structure, is subject to the following risks:

Authorized Participant Concentration Risk.    Only an authorized participant may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that may act as authorized participants on an agency basis (i.e., on behalf of other market participants). To the extent that authorized participants exit the business or are unable to proceed with orders for the issuance or redemption of Creation Units and no other authorized participant is able to step forward to fulfill the order, Shares may be more likely to trade at a premium or discount to NAV and possibly face trading halts and/or delisting, and the bid/ask spread (the difference between the price that someone is willing to pay for Shares at a specific point in time versus the price at which someone is willing to sell) on Shares may widen.

Cash Transactions Risk.    The Fund may effectuate all or a portion of the issuance and redemption of Creation Units for cash, rather than in-kind securities. As a result, an investment in the Fund may be less tax-efficient than an investment in an ETF that effectuates its Creation Units only on an in-kind basis. ETFs are able to make in-kind redemptions to avoid being taxed on gains on the distributed portfolio securities at the fund level. A fund that effects redemptions for cash may be required to sell portfolio securities in order to obtain the cash needed to distribute redemption proceeds and may be forced to recognize gains. The Fund intends to distribute gains that arise by virtue of the issuance and redemption of Creation Units being effectuated in cash to shareholders to avoid being taxed on this gain at the fund level and otherwise comply with special tax rules that apply to it. This may cause shareholders to be subject to tax on gains they would not otherwise be subject to, or at an earlier date than if they had made an investment in another ETF. Moreover, cash transactions may have to be carried out over several days if the securities market is relatively illiquid and may involve considerable brokerage fees and taxes. These brokerage fees and taxes, which will be higher than if the Fund sold and redeemed its shares principally in-kind, will be passed on to those purchasing and redeeming Creation Units in the form of creation and redemption transaction fees. The Fund’s use of cash for creations and redemptions could also result in dilution to the Fund and increased transaction costs, which could negatively impact the Fund’s ability to achieve its investment objective.

Market Maker Risk.    If the Fund has lower average daily trading volumes, it may rely on a small number of third-party market makers to provide a market for the purchase and sale of Shares. Any trading halt or other problem relating to the trading activity of these market makers could result in a dramatic change in the spread between the Fund’s NAV and the price at which the Shares are trading on the Exchange, which could result in a decrease in the market price of the Shares. In addition, decisions by market makers or authorized participants to reduce their role or step away from these activities in times of market stress could inhibit the effectiveness of the arbitrage process in maintaining the relationship between the underlying values of the Fund’s portfolio securities and the Fund’s market price. This reduced effectiveness could result in Shares trading at a discount to NAV and in greater than normal intra-day bid-ask spreads for Shares.

Operational Risk.    The Fund is exposed to operational risks arising from a number of factors, including, but not limited to, human error in the calculation of the Cap, processing and communication errors, errors of the Fund’s service providers, counterparties or other third-parties, failed or inadequate processes and technology or systems failures. The Fund and its Adviser and Sub-Adviser seek to reduce these operational risks through controls and procedures. However, these measures do not address every possible risk and may be inadequate to address these risks.

Premium/Discount Risk.    Shares trade on the Exchange at market prices rather than their NAV. The market price of Shares generally corresponds to movements in the Fund’s NAV as well as the relative supply and demand for Shares on the Exchange. The market price may be at, above (a premium) or below (a discount) the Fund’s NAV. Differences in market prices of Shares and the NAV per Share may be due, in large part, to the fact that supply and demand forces at work in the secondary trading market for Shares will be closely related to, but not identical to, the same forces influencing the prices of the Fund’s holdings trading individually or in the aggregate at any point in time. These differences can be especially pronounced during times of market volatility or stress. During these periods, the demand for Shares may decrease considerably and cause the market price of Shares to deviate, and in some cases deviate significantly, from the Fund’s NAV and the bid/ask spread on Shares may widen.

Trading Issues Risk.    Although Shares are listed for trading on the Exchange, there can be no assurance that an active trading market for Shares will develop or be maintained. Trading in Shares on the Exchange may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in Shares inadvisable. In addition, trading in Shares on the Exchange is subject to trading halts caused by extraordinary market volatility pursuant to the Exchange “circuit breaker” rules. Market makers are under no obligation to make a market in the Shares, and authorized participants are not obligated to submit purchase or redemption orders for Creation Units. There can be no assurance that the requirements of the Exchange necessary to maintain the listing of the Fund will continue to be met or will remain unchanged.

Innovator U.S. Equity 10 Buffer ETF - Quarterly | Tax Risk [Member]  
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Risk [Text Block]

Tax Risk.    The Fund has elected to be treated and intends to qualify each year as a regulated investment company (“RIC”) under Subchapter M of the Code. In order to be treated as a RIC, the Fund must meet certain income, diversification and distribution tests. If, in any year, the Fund fails to qualify as a RIC under the applicable tax laws, the Fund would be taxed as an ordinary corporation. The federal income tax treatment of certain aspects of the proposed operations of the Fund is not entirely clear, which could impact the Fund’s ability to qualify as a RIC. This includes the tax aspects of the Fund’s options strategy, its hedging strategy, the possible application of the “straddle” rules, and various loss limitation provisions of the Code. The Fund’s investments in offsetting positions with respect to the Underlying ETF may affect the character of gains or losses realized by the Fund under the Code’s “straddle” rules and may increase any short-term capital gains realized by the Fund. The Fund intends to treat any income it may derive from the FLEX Options as “qualifying income” under the provisions of the Code applicable to RICs. If the income is not qualifying income or the referenced asset is not appropriately treated as the issuer of the FLEX Options, the Fund could lose its own status as a RIC. To maintain its status as a RIC, the

Fund must distribute, on an annual basis, at least 90% of its investment company taxable income for each taxable year. In addition, to avoid a non-deductible excise tax, the Fund must distribute on a calendar year basis 98% of its ordinary taxable income and 98.2% of its capital gain net income for each taxable year (plus 100% of any undistributed amounts for prior years). Separately, depending upon the circumstances, sales of its portfolio investments (including FLEX Options) to fund redemptions could cause the Fund to recognize income that the Fund is required to distribute to maintain the Fund’s RIC status and avoid the excise tax. Funding such distributions could require additional sales, which could require more distributions and affect the projected performance of the Fund. Alternatively, if the Fund only makes distributions to maintain its RIC status and becomes subject to the excise tax, that could also affect the projected performance of the Fund. In either case, the assets sold to fund redemptions, distributions or pay the excise tax will not be available to assist the Fund in meeting its target outcome. With respect to the RIC diversification test, identifying the issuer can depend on the terms and conditions of a given investment. There is no published Internal Revenue Service guidance or only limited case law on how to determine the “issuer” of certain derivatives that the Fund will enter into. Based upon language in the legislative history, the Fund intends to treat the issuer of the FLEX Options as the referenced asset, which, assuming the referenced asset qualifies as a RIC, would allow the Fund to qualify for special rules in the RIC diversification requirements. The FLEX Options included in the portfolio are exchange-traded options. Under Section 1256 of the Code, certain types of exchange-traded options are treated as if they were sold (i.e., “marked to market”) at the end of each year. The Fund does not believe that the positions held by the Fund will be subject to Section 1256, which means that the positions will not be marked to market. There is a risk that because the offsetting FLEX Options are being held by a single person that the IRS may take the position that the FLEX Options, viewed together, should be treated as a single instrument for federal tax purposes. The result of such a position would be that the Fund would fail the RIC diversification tests causing the RIC to be taxed as an ordinary corporation, unless certain cure rights based upon reasonable cause may apply. The Fund has obtained an opinion of tax counsel that the FLEX Options should not be collapsed into a single instrument. However, such an opinion is not binding upon the IRS or the courts. In the event that a shareholder purchases Shares of the Fund before a distribution by the Fund, the entire distribution may be taxable to the shareholder even though a portion of the distribution effectively represents a return of the purchase price.

Innovator U.S. Equity 10 Buffer ETF - Quarterly | Valuation Risk [Member]  
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Valuation Risk.    During periods of reduced market liquidity or in the absence of readily available market quotations for the holdings of the Fund, the valuation of the Fund’s FLEX Options will become more difficult. In market environments where there is reduced availability of reliable objective pricing data, the judgment of the Fund’s investment adviser in determining the fair value of the security may play a greater role. While such determinations may be made in good faith, it may nevertheless be more difficult for the Fund to accurately assign a daily value.

Innovator U.S. Small Cap 10 Buffer ETF - Quarterly | Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] You could lose money by investing in the Fund.
Innovator U.S. Small Cap 10 Buffer ETF - Quarterly | Risk Not Insured Depository Institution [Member]  
Prospectus [Line Items]  
Risk [Text Block] An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency.
Innovator U.S. Small Cap 10 Buffer ETF - Quarterly | Risk Nondiversified Status [Member]  
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Non-Diversification Risk.    The Fund is classified as a “non-diversified company” under the 1940 Act. As a result, the Fund is only limited as to the percentage of its assets which may be invested in the securities of any one issuer by the diversification requirements imposed by the Internal Revenue Code of 1986, as amended (the “Code”). The Fund may invest a relatively high percentage of its assets in a limited number of issuers. As a result, the Fund may be more susceptible to a single adverse economic or regulatory occurrence affecting one or more of these issuers, experience increased volatility and be highly invested in certain issuers.

Innovator U.S. Small Cap 10 Buffer ETF - Quarterly | Defined Outcome Strategy Risk [Member]  
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Defined Outcome Strategy Risk.    The Fund, in employing a “defined outcome strategy” is subject to certain unique risks, which are detailed below.

Buffered Loss Risk.    There can be no guarantee that the Fund will be successful in its strategy to provide buffer protection against Underlying ETF losses if the Underlying ETF’s share price decreases by 10% or less over the duration of the Outcome Period. A shareholder may lose their entire investment. The Fund’s strategy seeks to provide the sought-after protection of the Buffer if Shares are held at the time at which the Fund enters into the FLEX Options and held until those FLEX Options expire at the end of the Outcome Period. In the event an investor purchases Shares after the FLEX Options were entered into or sells Shares prior to the expiration of the FLEX Options, the Buffer that the Fund seeks to provide may not be available. The Fund does not provide principal protection or non-principal protection, and an investor may experience significant losses on its investment, including the loss of its entire investment. An investor that holds Shares through multiple Outcome Periods will be unable to recapture losses from prior Outcome Periods because at the end of each Outcome Period, a new Buffer will be established based on the then-current price of the Underlying ETF and any losses experienced below the prior Buffer will be locked-in. Moreover, the quarterly imposition of a new Cap on future gains may make it difficult to recoup any losses from the prior Outcome Periods such that, over multiple Outcome Periods, the Fund may have losses that exceed those of the Underlying ETF. To the extent the Fund invests directly in the Underlying ETF, the Buffer will be provided after the consideration of dividends received, whereby the Fund has assumed an anticipated dividend rate, which is on the historical dividend rate of the Underlying ETF. This assumed dividend rate may be less than dividends actually received by the Fund for the Outcome Period, in which case shareholders may not receive the sought-after downside protection of the Buffer.

Cap Change Risk.    A new Cap is established at the beginning of each Outcome Period and is dependent on prevailing market conditions at the time the Cap is established. As such, the Cap may rise or fall from one Outcome Period to the next and is unlikely to remain the same for consecutive Outcome Periods.

Capped Upside Return Risk.    The Fund’s strategy seeks to provide returns that are subject to the Cap. In the event that the Underlying ETF experiences gains in excess of the Cap for the Outcome Period, the Fund will not participate in, and will underperform the Underlying ETF to the extent of, those gains beyond the Cap. The Fund’s strategy seeks to participate in the upside of the entirety of the Underlying ETF gains (subject to the Cap), if Shares are held at the time at which the Fund enters into the FLEX Options and held until those FLEX Options expire at the end of the Outcome Period. In the event an investor purchases Shares after the FLEX Options were entered into, there may be little or no ability for that investor to experience an investment gain on their Shares. Due to the size of the Buffer over each quarterly Outcome Period, the Fund expects its Cap to be lower relative to other “defined outcome products” with an annual outcome period and/or a lower buffer. Further, because the FLEX Options are designed to produce the sought-after returns on the last day of the Outcome Period, if an investor sells Shares prior to the expiration date of the FLEX Options such investor may sell at a point where the Fund’s performance does not match the performance of the Underlying ETF

over the Outcome Period, and therefore may sell at a point where the Fund has underperformed the Underlying ETF, even if such gains do not exceed the Cap. The Fund seeks to actively manage its portfolio such that any transaction fees incurred by the Fund in connection with the management of the Fund’s assets will not impact the Fund’s performance in seeking to provide upside exposure to the Underlying ETF or the Fund’s ability to experience returns that match the Cap, to the extent the returns of the Underlying ETF are equal to or greater than the Cap. However, it is not guaranteed that the Fund will be able to successfully manage its assets to contemplate the transaction fees incurred by the Fund to achieve the Outcomes sought by the Fund. An investor that holds Shares through multiple Outcome Periods may fail to experience gains comparable to those of the Underlying ETF over time because at the end of each Outcome Period, a new Cap will be established based on the then-current price of the Underlying ETF and any gains above the prior Cap will be forfeited. To the extent the Fund invests directly in the Underlying ETF, the Cap will be provided after the consideration of dividends received, whereby the Fund has assumed an anticipated dividend rate, which is on the historical dividend rate of the Underlying ETF. This assumed dividend rate may be less than dividends actually received by the Fund for the Outcome Period, in which case the Cap will be less than disclosed herein.

Investment Objective Risk.    Certain circumstances under which the Fund might not achieve its objective include, but are not limited, to (i) if the Fund disposes of FLEX Options, (ii) if the Fund is unable to maintain the proportional relationship based on the number of FLEX Options in the Fund’s portfolio, (iii) a significant accrual of Fund expenses in connection with effecting the Fund’s principal investment strategy or (iv) adverse tax law changes or interpretations affecting the treatment of FLEX Options. If these factors were to occur, the Fund may be unable to achieve its investment objective, and investors may not receive the Outcomes described herein. Finally, the Fund is also subject to management risk as an actively-managed fund, which may cause it not to achieve its investment objective.

Management Risk.    Defined outcome strategies are actively-managed and accordingly, the Fund is subject to management risk. The Sub-Adviser applies investment techniques and risk analyses in making investment decisions for the Fund, subject to the oversight of the Adviser, but there can be no guarantee that the Sub-Adviser will properly implement the Fund’s investment strategy and therefore the Fund may not achieve its investment objective or its sought-after Outcomes, or perform as well as similarly situated funds.

Outcome Period Risk.    The Fund’s investment strategy is designed to deliver returns that match those of the Underlying ETF if Shares are held from the time the Fund enters into the FLEX Options and held until those FLEX Options expire at the end of the Outcome Period. In the event an investor purchases Shares after the FLEX Options were entered into or sells Shares prior to the expiration of the FLEX Options, the returns realized by the investor will not match those that the Fund seeks to provide. An investor that holds Shares through multiple Outcome Periods may fail to experience gains comparable to those of the Underlying ETF over time because at the end of each Outcome Period, a new Cap will be established based on the then-current price of the Underlying ETF and any gains of the Underlying ETF above the prior Cap will be forfeited. In addition, because the Fund is designed to achieve Outcomes that

change for each three-month Outcome Period, the Outcomes that are achieved by the Fund for a three-month Outcome Period will be different than the Outcomes achieved by the Fund over multiple Outcome Periods, or on an annualized basis. Similarly, investors holding Shares over multiple Outcome Periods will experience different investment results than holding a fund that has a longer Outcome Period (e.g., one year) and any losses for such holders could exceed the performance for a fund with a longer Outcome Period.

Upside Participation Risk.    There can be no guarantee that the Fund will be successful in its strategy to provide shareholders with returns that match the increases in the price of the Underlying ETF over the Outcome Period, subject to a maximum return imposed by the Cap. In the event an investor purchases Shares after the FLEX Options were entered into or does not stay invested in the Fund for the entirety of the Outcome Period, the returns realized by such investor may not match those that the Fund seeks to achieve. The Fund is subject to a Cap which may be lower relative to other “defined outcome products” and, as a result, any positive investment returns delivered by the Fund may be lower in comparison to such products and to that of the Underlying ETF.

Innovator U.S. Small Cap 10 Buffer ETF - Quarterly | Derivatives Risk [Member]  
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Derivatives Risk.    To employ the Fund’s defined outcome strategy, the Fund utilizes FLEX Options, which are a type of derivative instrument. The use of derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities and other traditional investments. These risks include: (i) the risk that the counterparty to a derivative transaction may not fulfill its contractual obligations; (ii) risk of mispricing or improper valuation; and (iii) the risk that changes in the value of the derivative may not correlate perfectly with the underlying asset. Derivative prices are highly volatile and may fluctuate substantially during a short period of time. Such prices are influenced by numerous factors that affect the markets, including, but not limited to: (i) changing supply and demand relationships; (ii) government programs and policies; (iii) national and international political and economic events; (iv) changes in interest rates; (v) inflation and deflation; and (vi) changes in supply and demand relationships. Trading derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities. Derivative contracts ordinarily have leverage inherent in their terms, which can magnify potential for gain or loss and, therefore, amplify the effects of market volatility on share price. The Fund has taken the necessary steps to comply with the requirements of Rule 18f-4 under the 1940 Act (“Rule 18f-4”) in its usage of FLEX Options. The Fund has adopted and implements a derivatives risk management program that contains policies and procedures reasonably designed to manage the Fund’s derivatives risks, has appointed a derivatives risk manager who is responsible for administrating the derivatives risk management program, complies with outer limitations on risks relating to its derivatives transactions and carries out enhanced reporting to the Board, the SEC and the public regarding its derivatives activities. To the extent the Fund is noncompliant with Rule 18f-4, the Fund may be required to adjust its investment portfolio which may, in turn, negatively impact the Fund’s ability to deliver the sought-after Outcomes. In addition to the foregoing, the Fund is subject to the following risks associated with its use of derivative instruments:

Clearing Member Default Risk.    Transactions in some types of derivatives, including FLEX Options, are required to be centrally cleared (“cleared derivatives”). In a transaction involving cleared derivatives, the Fund’s counterparty is a clearing house, such as the OCC, rather than a bank or broker. Since the Fund is not a member of clearing houses and only members of a clearing house (“clearing members”) can participate directly in the clearing house, the Fund

will hold cleared derivatives through accounts at clearing members. In cleared derivatives positions, the Fund will make payments (including margin payments) to, and receive payments from, a clearing house through their accounts at clearing members. Customer funds held at a clearing organization in connection with any option contracts are held in a commingled omnibus account and are not identified to the name of the clearing member’s individual customers. As a result, assets deposited by the Fund with any clearing member as margin for its FLEX Options may, in certain circumstances, be used to satisfy losses of other clients of the Fund’s clearing member. In addition, although clearing members guarantee performance of their clients’ obligations to the clearing house, there is a risk that the assets of the Fund might not be fully protected in the event of the clearing member’s bankruptcy. The Fund is also subject to the risk that a limited number of clearing members are willing to transact on the Fund’s behalf, which heightens the risks associated with a clearing member’s default. If a clearing member defaults the Fund could lose some or all of the benefits of a transaction entered into by the Fund with the clearing member. The loss of a clearing member for the Fund to transact with could result in increased transaction costs and other operational issues that could impede the Fund’s ability to implement its investment strategy. If the Fund cannot find a clearing member to transact with on the Fund’s behalf, the Fund may be unable to effectively implement its investment strategy.

Correlation Risk.    The FLEX Options held by the Fund will be exercisable at the strike price only on their expiration date. As a FLEX Option approaches its expiration date, its value typically will increasingly move with the value of the Underlying ETF. However, the value of the FLEX Options may vary prior to the expiration date because of related factors other than the value of the Underlying ETF. The value of the FLEX Options will be determined based upon market quotations or using other recognized pricing methods. Factors that may influence the value of the FLEX Options include interest rate changes and implied volatility levels of the Underlying ETF, among others. The value of the FLEX Options held by the Fund typically do not increase or decrease at the same level as the Underlying ETF’s share price on a day-to-day basis due to these factors (although they generally move in the same direction). Since the Underlying ETF has the potential to be more volatile than other funds, in the period between the beginning and end of the Outcome Period, it is possible that the degree of non-correlation between the value of the FLEX Options and the value of the Underlying ETF will be higher than if the FLEX Options utilized a less volatile fund as their reference asset.

Counterparty Risk.    Counterparty risk is the risk an issuer, guarantor or counterparty of a security in the Fund is unable or unwilling to meet its obligation on the security. Counterparty risk may arise because of the counterparty’s financial condition, market activities, or for other reasons. The Fund may be unable to recover its investment from the counterparty or may obtain a limited and/or delayed recovery. The OCC acts as guarantor and central counterparty with respect to the FLEX Options. As a result, the ability of the Fund to meet its objective depends on the OCC being able to meet its obligations. In the event an OCC clearing member that is a counterparty of the Fund were to become insolvent, the Fund may have some or all of its FLEX Options closed without its consent or may experience delays or other difficulties in attempting to close or exercise its affected FLEX Options positions, both of which would impair the Fund’s ability to deliver on its investment strategy. The OCC’s rules and procedures are designed to facilitate the prompt settlement of options transactions and exercises, including for clearing member insolvencies. However, there is the risk that the OCC and its

backup system will fail if clearing member insolvencies are substantial or widespread. In the unlikely event that the OCC becomes insolvent or is otherwise unable to meet its settlement obligations, the Fund could suffer significant losses.

FLEX Options Risk.    The Fund will utilize FLEX Options issued and guaranteed for settlement by the OCC. The use of option contracts involves investment strategies and risks different from those associated with ordinary portfolio securities transactions. The prices of option contracts are volatile and are influenced by, among other things, actual and anticipated changes in the value of the underlying instrument, changes in interest or currency exchange rates, including the anticipated volatility, which are affected by fiscal and monetary policies and by national and international political, changes in the actual or implied volatility or the reference asset, the time remaining until the expiration of the option contract and economic events. There may at times be an imperfect correlation between the movement in values option contracts and the reference asset, and there may at times not be a liquid secondary market for certain option contracts.

The Fund bears the risk that the OCC will be unable or unwilling to perform its obligations under the FLEX Options contracts. In the unlikely event that the OCC becomes insolvent or is otherwise unable to meet its settlement obligations, the Fund could suffer significant losses. Additionally, FLEX Options may be less liquid than certain other securities, such as standardized options. In less liquid markets for the FLEX Options, the Fund may have difficulty closing out certain FLEX Options positions at desired times and prices. In connection with the creation and redemption of Shares, to the extent market participants are not willing or able to enter into FLEX Option transactions with the Fund at prices that reflect the market price of the Shares, the Fund’s NAV and, in turn the share price of the Fund, could be negatively impacted.

The Fund may experience substantial downside from specific FLEX Option positions and certain FLEX Option positions may expire worthless. The FLEX Options held by the Fund are exercisable at the strike price on their expiration date. As a FLEX Option approaches its expiration date, its value typically increasingly moves with the value of the Underlying ETF. However, prior to such date, the value of the FLEX Options does not increase or decrease at the same rate as the Underlying ETF’s share price on a day-to-day basis (although they generally move in the same direction). The value of the FLEX Options held by the Fund will be determined based on market quotations or other recognized pricing methods. The value of the underlying FLEX Options will be affected by, among others, changes in the Underlying ETF’s share price, changes in interest rates, changes in the actual and implied volatility of the Underlying ETF and the remaining time to until the FLEX Options expire.

Liquidity Risk.    In the event that trading in the underlying FLEX Options is limited or absent, the value of the Fund’s FLEX Options may decrease. There is no guarantee that a liquid secondary trading market will exist for the FLEX Options. The trading in FLEX Options may be less deep and liquid than the market for certain other securities, including certain non-customized option contracts. In a less liquid market for the FLEX Options, terminating the FLEX Options may require the payment of a premium or acceptance of a discounted price and may take longer to complete. Additionally, the liquidation of a large number of FLEX Options may more significantly impact the price in a less liquid market. Further, the Fund

requires a sufficient number of participants to facilitate the purchase and sale of options on an exchange to provide liquidity to the Fund for its FLEX Option positions. A less liquid trading market may adversely impact the value of the FLEX Options and the value of your investment.

Innovator U.S. Small Cap 10 Buffer ETF - Quarterly | Underlying ETF Risk [Member]  
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Underlying ETF Risk.    The Fund’s investment performance largely depends on the investment performance and associated risks of the Underlying ETF. The Underlying ETF is subject to many of the same structural risks as the Fund that are described in more detail herein (see “Risks Associated with ETFs” below). The Adviser expects to waive a portion of its management fee in an amount that equals to any acquired fund fees and expenses the Fund incurs as a result of any direct investment in the Underlying ETF. However, if the Adviser does not waive such expenses in the future, the Fund will bear its proportionate share of the Underlying ETF’s expenses, subjecting Fund shareholders to such expenses. Further, the risks of investing in an ETF also include the risks associated with the underlying investments held by the ETF. As such, the Fund may be subject to the following risks as a result of its exposure to the Underlying ETF (or the components thereof):

Equity Securities Risk.    Equity securities may decline in value because of declines in the price of a particular holding or the broad stock market. Such declines may relate directly to the issuer of a security or broader economic or market events, including changes in interest rates. The value of shares will fluctuate with changes in the value of the equity securities the Underlying ETF invests in.

Financials Sector Risk.    Financial companies, such as retail and commercial banks, insurance companies and financial services companies, are especially subject to the adverse effects of economic recession, currency exchange rates, extensive government regulation, decreases in the availability of capital, volatile interest rates, portfolio concentrations in geographic markets, industries or products (such as commercial and residential real estate loans) and competition from new entrants and blurred distinctions in their fields of business.

Health Care Sector Risk.    Companies in the health care sector are subject to extensive government regulation, and their profitability can be significantly affected by restrictions on government reimbursement for medical expenses, rising costs of medical products and services, pricing pressure (including price discounting), limited product lines and an increased emphasis on the delivery of healthcare through outpatient services. Companies in the health care sector are heavily dependent on obtaining and defending patents, which may be time consuming and costly, and the expiration of patents may also adversely affect the profitability of these companies. Health care companies are also subject to extensive litigation based on product liability and similar claims. In addition, their products can become obsolete due to industry innovation, changes in technologies or other market developments. Many new products in the health care sector require significant research and development and may be subject to regulatory approvals, all of which may be time consuming and costly with no guarantee that any product will come to market.

Industrials Sector Risk.    Companies within the industrials sector are affected by supply and demand both for their specific product or service and for industrial sector products and services in general. Government regulation, world events, exchange rates and economic conditions, technological developments and liabilities for environmental damage and general civil

liabilities will likewise affect the performance of these companies. Additionally, government spending policies may impact the profitability of the industrials sector since industrials companies, especially aerospace and defense companies, often rely on government demand for their products and services.

Small- and Mid-Capitalization Companies Risk.    Small and/or mid capitalization companies may be more vulnerable to adverse general market or economic developments, and their securities may be less liquid and may experience greater price volatility than larger, more established companies as a result of several factors, including limited trading volumes, fewer products or financial resources, management inexperience and less publicly available information. Accordingly, such companies are generally subject to greater market risk than larger, more established companies.

Innovator U.S. Small Cap 10 Buffer ETF - Quarterly | Concentration Risk [Member]  
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Concentration Risk.    Through its exposure to the Underlying ETF, the Fund will concentrate in the securities of a particular industry or group of industries to the same extent as the Underlying ETF. To the extent the Fund has significant exposure in a single asset class or the securities of issuers within the same country, state, region, industry or sector, an adverse economic, business or political development may affect the value of the Fund’s investments more than if the Fund were more broadly diversified. A significant exposure makes the Fund more susceptible to any single occurrence and may subject the Fund to greater market risk than a fund that is more broadly diversified.

Innovator U.S. Small Cap 10 Buffer ETF - Quarterly | Cyber Security Risk [Member]  
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Cyber Security Risk.    As the use of Internet technology has become more prevalent in the course of business, the investment industry has become more susceptible to potential operational risks through breaches in cyber security. A breach in cyber security refers to both intentional and unintentional events that may cause the Fund to lose proprietary information, suffer data corruption or lose operational capacity. Such events could cause the Fund to incur regulatory penalties, reputational damage, additional compliance costs associated with corrective measures and/or financial loss. Cyber security breaches may involve unauthorized access to the Fund’s digital information systems through “hacking” or malicious software coding, but may also result from outside attacks such as denial-of-service attacks through efforts to make network services unavailable to intended users. In addition, cyber security breaches of the Fund’s third-party service providers, such as its administrator, transfer agent, or custodian can also subject the Fund to many of the same risks associated with direct cyber security breaches. The Fund has established risk management systems designed to reduce the risks associated with cyber security. However, there is no guarantee that such efforts will succeed, especially because the Fund does not directly control the cyber security systems of issuers or third-party service providers.

Innovator U.S. Small Cap 10 Buffer ETF - Quarterly | Market Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Market Risk.    The Fund could lose money over short periods due to short-term market movements and over longer periods during more prolonged market downturns. Assets may decline in value due to factors affecting financial markets generally or particular asset classes or industries represented in the markets. The value of FLEX Options or other assets may also decline due to general market conditions, economic trends or events that are not specifically related to the issuer of the security or other asset, or due to factors that affect a particular issuer or issuers, country, group of countries, region, market, industry, group of industries, sector or asset class. During a general market downturn, multiple asset classes may be negatively affected. Changes in market conditions and interest rates will not have the same impact on all types of securities. Securities,

including the Shares, are subject to market fluctuations and liquidity constraints that may be caused by such factors as economic, political, or regulatory developments, changes in interest rates, and/or perceived trends in securities prices. Shares of the Fund could decline in value or underperform other investments. The value of Shares may also decline as a result of market conditions. Factors such as inflation, changes in interest rates, changes in regulatory requirements, bank failures, political climate deterioration or developments, armed conflicts, natural disasters or future health crises, may negatively impact market conditions, and cause a decrease in the value of Shares. Other unexpected political, regulatory and diplomatic events within the U.S. and abroad may affect investor and consumer confidence and may adversely impact financial markets and the broader economy. These events, and any other future events, may adversely affect the prices and liquidity of the Fund’s portfolio investments and could result in disruptions in the trading markets.

Innovator U.S. Small Cap 10 Buffer ETF - Quarterly | Risks Associated with ETFs [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Risks Associated with ETFs.    The Fund is an ETF, and therefore, as a result of an ETF’s structure, is subject to the following risks:

Authorized Participant Concentration Risk.    Only an authorized participant may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that may act as authorized participants on an agency basis (i.e., on behalf of other market participants). To the extent that authorized participants exit the business or are unable to proceed with orders for the issuance or redemption of Creation Units and no other authorized participant is able to step forward to fulfill the order, Shares may be more likely to trade at a premium or discount to NAV and possibly face trading halts and/or delisting, and the bid/ask spread (the difference between the price that someone is willing to pay for Shares at a specific point in time versus the price at which someone is willing to sell) on Shares may widen.

Cash Transactions Risk.    The Fund may effectuate all or a portion of the issuance and redemption of Creation Units for cash, rather than in-kind securities. As a result, an investment in the Fund may be less tax-efficient than an investment in an ETF that effectuates its Creation Units only on an in-kind basis. ETFs are able to make in-kind redemptions to avoid being taxed on gains on the distributed portfolio securities at the fund level. A fund that effects redemptions for cash may be required to sell portfolio securities in order to obtain the cash needed to distribute redemption proceeds and may be forced to recognize gains. The Fund intends to distribute gains that arise by virtue of the issuance and redemption of Creation Units being effectuated in cash to shareholders to avoid being taxed on this gain at the fund level and otherwise comply with special tax rules that apply to it. This may cause shareholders to be subject to tax on gains they would not otherwise be subject to, or at an earlier date than if they had made an investment in another ETF. Moreover, cash transactions may have to be carried out over several days if the securities market is relatively illiquid and may involve considerable brokerage fees and taxes. These brokerage fees and taxes, which will be higher

than if the Fund sold and redeemed its shares principally in-kind, will be passed on to those purchasing and redeeming Creation Units in the form of creation and redemption transaction fees. The Fund’s use of cash for creations and redemptions could also result in dilution to the Fund and increased transaction costs, which could negatively impact the Fund’s ability to achieve its investment objective.

Market Maker Risk.    If the Fund has lower average daily trading volumes, it may rely on a small number of third-party market makers to provide a market for the purchase and sale of Shares. Any trading halt or other problem relating to the trading activity of these market makers could result in a dramatic change in the spread between the Fund’s NAV and the price at which the Shares are trading on the Exchange, which could result in a decrease in the market price of the Shares. In addition, decisions by market makers or authorized participants to reduce their role or step away from these activities in times of market stress could inhibit the effectiveness of the arbitrage process in maintaining the relationship between the underlying values of the Fund’s portfolio securities and the Fund’s market price. This reduced effectiveness could result in Shares trading at a discount to NAV and in greater than normal intra-day bid-ask spreads for Shares.

Operational Risk.    The Fund is exposed to operational risks arising from a number of factors, including, but not limited to, human error in the calculation of the Cap, processing and communication errors, errors of the Fund’s service providers, counterparties or other third-parties, failed or inadequate processes and technology or systems failures. The Fund and its Adviser and Sub-Adviser seek to reduce these operational risks through controls and procedures. However, these measures do not address every possible risk and may be inadequate to address these risks.

Premium/Discount Risk.    Shares trade on the Exchange at market prices rather than their NAV. The market price of Shares generally corresponds to movements in the Fund’s NAV as well as the relative supply and demand for Shares on the Exchange. The market price may be at, above (a premium) or below (a discount) the Fund’s NAV. Differences in market prices of Shares and the NAV per Share may be due, in large part, to the fact that supply and demand forces at work in the secondary trading market for Shares will be closely related to, but not identical to, the same forces influencing the prices of the Fund’s holdings trading individually or in the aggregate at any point in time. These differences can be especially pronounced during times of market volatility or stress. During these periods, the demand for Shares may decrease considerably and cause the market price of Shares to deviate, and in some cases deviate significantly, from the Fund’s NAV and the bid/ask spread on Shares may widen.

Trading Issues Risk.    Although Shares are listed for trading on the Exchange, there can be no assurance that an active trading market for Shares will develop or be maintained. Trading in Shares on the Exchange may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in Shares inadvisable. In addition, trading in Shares on the Exchange is subject to trading halts caused by extraordinary market volatility pursuant to the Exchange “circuit breaker” rules. Market makers are under no obligation to make a market in the Shares, and authorized participants are not obligated to submit purchase or redemption orders for Creation Units. There can be no assurance that the requirements of the Exchange necessary to maintain the listing of the Fund will continue to be met or will remain unchanged.

Innovator U.S. Small Cap 10 Buffer ETF - Quarterly | Tax Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Tax Risk.    The Fund has elected to be treated and intends to qualify each year as a regulated investment company (“RIC”) under Subchapter M of the Code. In order to be treated as a RIC, the Fund must meet certain income, diversification and distribution tests. If, in any year, the Fund fails to qualify as a RIC under the applicable tax laws, the Fund would be taxed as an ordinary corporation. The federal income tax treatment of certain aspects of the proposed operations of the Fund is not entirely clear, which could impact the Fund’s ability to qualify as a RIC. This includes the tax aspects of the Fund’s options strategy, its hedging strategy, the possible application of the “straddle” rules, and various loss limitation provisions of the Code. The Fund’s investments in offsetting positions with respect to the Underlying ETF may affect the character of gains or losses realized by the Fund under the Code’s “straddle” rules and may increase any short-term capital gains realized by the Fund. The Fund intends to treat any income it may derive from the FLEX Options as “qualifying income” under the provisions of the Code applicable to RICs. If the income is not qualifying income or the referenced asset is not appropriately treated as the issuer of the FLEX Options, the Fund could lose its own status as a RIC. To maintain its status as a RIC, the Fund must distribute, on an annual basis, at least 90% of its investment company taxable income for each taxable year. In addition, to avoid a non-deductible excise tax, the Fund must distribute on a calendar year basis 98% of its ordinary taxable income and 98.2% of its capital gain net income for each taxable year (plus 100% of any undistributed amounts for prior years). Separately, depending upon the circumstances, sales of its portfolio investments (including FLEX Options) to fund redemptions could cause the Fund to recognize income that the Fund is required to distribute to maintain the Fund’s RIC status and avoid the excise tax. Funding such distributions could require additional sales, which could require more distributions and affect the projected performance of the Fund. Alternatively, if the Fund only makes distributions to maintain its RIC status and becomes subject to the excise tax, that could also affect the projected performance of the Fund. In either case, the assets sold to fund redemptions, distributions or pay the excise tax will not be available to assist the Fund in meeting its target outcome. With respect to the RIC diversification test, identifying the issuer can depend on the terms and conditions of a given investment. There is no published Internal Revenue Service guidance or only limited case law on how to determine the “issuer” of certain derivatives that the Fund will enter into. Based upon language in the legislative history, the Fund intends to treat the issuer of the FLEX Options as the referenced asset, which, assuming the referenced asset qualifies as a RIC, would allow the Fund to qualify for special rules in the RIC diversification requirements. The FLEX Options included in the portfolio are exchange-traded options. Under Section 1256 of the Code, certain types of exchange-traded options are treated as if they were sold (i.e., “marked to market”) at the end of each year. The Fund does not believe that the positions held by the Fund will be subject to Section 1256, which means that the positions will not be marked to market. There is a risk that because the offsetting FLEX Options are being held by a single person that the IRS may take the position that the FLEX Options, viewed together, should be treated as a single instrument for federal tax purposes. The result of such a position would be that the Fund would fail the RIC diversification tests causing the RIC to be taxed as an ordinary corporation, unless certain cure rights based upon reasonable cause may apply. The Fund has obtained an opinion of tax counsel that the FLEX Options should not be collapsed into a single instrument. However, such an opinion is not binding upon the IRS or the courts. In the event that a shareholder purchases Shares of the Fund before a distribution by the Fund, the entire distribution may be taxable to the shareholder even though a portion of the distribution effectively represents a return of the purchase price.

Innovator U.S. Small Cap 10 Buffer ETF - Quarterly | Valuation Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Valuation Risk.    During periods of reduced market liquidity or in the absence of readily available market quotations for the holdings of the Fund, the valuation of the Fund’s FLEX Options will become more difficult. In market environments where there is reduced availability of reliable objective pricing data, the judgment of the Fund’s investment adviser in determining the fair value of the security may play a greater role. While such determinations may be made in good faith, it may nevertheless be more difficult for the Fund to accurately assign a daily value.