Investment Risks |
Oct. 31, 2025 |
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| Innovator Deepwater Frontier Tech ETF | Risk Lose Money [Member] | |
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| Risk [Text Block] | You could lose money by investing in the Fund. |
| Innovator Deepwater Frontier Tech 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 Deepwater Frontier Tech ETF | Investment Strategy Risk [Member] | |
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| Risk [Text Block] | Investment Strategy Risk. The Fund’s investment strategy subjects it to certain unique risks, which are detailed below. Concentration Risk. To the extent that the Reference Index concentrates in the securities of issuers in a particular industry or sector, the Fund may also concentrate its investments to approximately the same extent. The Fund may be susceptible to loss due to adverse occurrences to the extent that the Fund’s investments are concentrated in a particular issuer or issuers, region, market, industry, group of industries, sector or asset class. Currency Risk. Changes in currency exchange rates affect the value of investments denominated in a foreign currency, and therefore the value of such investments in the Fund’s portfolio. The Fund’s NAV could decline if a currency to which the Fund has exposure depreciates against the U.S. dollar 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. As a result, the value of an investment in the Fund may change quickly and without warning. Depositary Receipts Risk. Depositary receipts, such as ADRs or GDRs, may be subject to certain of the risks associated with direct investments in the securities of foreign companies, such as currency, political, economic and market risks, because their values depend on the performance of the non-dollar denominated underlying foreign securities. Certain countries may limit the ability to convert depositary receipts into the underlying foreign securities and vice versa, which may cause the securities of the foreign company to trade at a discount or premium to the market price of the related depositary receipts. Depositary receipts may be purchased through “sponsored” or “unsponsored” facilities. A sponsored facility is established jointly by a depositary and the issuer of the underlying security. A depositary may establish an unsponsored facility without participation by the issuer of the deposited security. Unsponsored receipts may involve higher expenses and may be less liquid. Holders of unsponsored depositary receipts generally bear all the costs of such facilities, and the depositary of an unsponsored facility frequently is under no obligation to distribute shareholder communications received from the issuer of the deposited security or to pass through voting rights to the holders of such receipts in respect of the deposited securities. Emerging Markets Risk. Emerging markets are generally more volatile than markets of more developed countries and may be more likely to experience inflation risk, political turmoil and rapid changes in economic conditions than more developed markets. 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. Emerging markets often have less uniformity in accounting and reporting requirements, unreliable securities valuation and greater risk with custody of securities than developed markets. Additionally, emerging markets often have greater risk of capital controls through such measures as taxes or interest rate control than developed markets. Certain emerging market countries may also lack the required infrastructure to attract large amounts of non-U.S. trade and investment. Additionally, the rights and remedies available to investors in emerging market securities may be more limited than those available for investments in more developed markets. Finally, the limitations associated with investments in emerging market companies could 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 Fund invests in. 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. Non-U.S. Investment Risk. Investments in securities of non-U.S. companies (particularly in emerging markets) present risks beyond those of securities of U.S. issuers and can be more volatile than investments in U.S. companies. Risks of investing in securities of foreign companies include: different accounting standards; expropriation, nationalization or other adverse political or economic developments; currency devaluation, blockages or transfer restrictions; changes in foreign currency exchange rates; taxes; restrictions on non-U.S. investments and exchange of securities; and less government supervision and regulation of issuers in non-U.S. countries. Further, other diplomatic, political or economic developments can affect investments in foreign companies. Prices of non-U.S. securities may also be more volatile. Finally, the value of securities denominated in foreign currencies, and of dividends from such securities, can change significantly when foreign currencies strengthen or weaken relative to the U.S. dollar. 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. Significant Exposure Risk. To the extent that the Fund invests or has exposure to a significant percentage of its assets 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. Artificial Intelligence Companies Risk. The Fund invests in companies that are involved in various aspects of artificial intelligence technology. These companies face unique risks, including limited markets, changes in business cycles, world economic growth, technological progress, rapid technological change, government regulation and intense competition. Further, these companies may have limited product lines, markets, financial resources and/or personnel. Securities of such companies (including smaller, start-up companies), tend to be more volatile than securities that do not rely heavily on technology. Rapid changes to technologies that affect a company’s products could materially adversely impact such company’s operating results. Artificial intelligence companies often depend heavily on intellectual property protections (including patents, copyrights, trademarks and trade secret laws) to establish and protect their proprietary rights in their products and technologies. However, there is no guarantee these measures will prevent misappropriation or that competitors won’t develop technologies that are substantially equivalent or superior. Further, artificial intelligence companies often engage in significant amounts of spending on research and development, however such investment does not ensure commercial success and there is no guarantee that the products or services produced by these companies will be successful. Artificial intelligence companies are also vulnerable to cyberattacks, regulatory changes, and shifting business cycles, all of which can materially impact performance. 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. Small- and Mid-Capitalization Company Risk. Generally, small- or mid-capitalization companies, which are often less seasoned, have more potential for rapid growth. However, they often involve greater risk than large cap companies and these risks are passed on to funds that invest in them. These companies may not have the management experience, financial resources, product diversification and competitive strengths of larger companies. Variable Interest Entity Risk. The Fund may invest in non-Chinese holding companies that have created structures known as VIEs. VIEs allow exposure to certain Chinese companies that are unavailable for direct investment by foreign investors. In many sectors in China, companies are not allowed to have foreign ownership and cannot directly list on exchanges outside of China. Many Chinese companies have created VIE structures to enable indirect foreign ownership and raise capital from foreign investors. Under a VIE structure, a Chinese operating company establishes an offshore holding company in another jurisdiction, such as the Cayman Islands, which enters into contractual agreements with the Chinese issuer or operating company to obtain economic exposure to the Chinese company. The non-Chinese holding company then issues shares on an exchange outside of mainland China allowing investors to obtain economic exposure to the Chinese issuer or operating through contractual means rather than through formal equity ownership. Neither the holding company nor the shareholder of the VIE owns an equity interest in the Chinese operating company. However, for accounting purposes the holding company is able to consolidate the operating company into its financial statements. Neither the holding company nor the shareholder of the holding company has any voting rights or other types of control that an equity holder typically has. VIEs have never formally been recognized under Chinese laws, though VIEs are well known to officials and regulators in China and are a longstanding industry practice. Intervention by the Chinese government with respect to VIEs could significantly and negatively affect the Chinese company’s performance and the enforceability of the VIE’s contractual arrangements with the Chinese company that are the basis for the economic exposure to the Chinese company. Any action by the Chinese government could considerably impact the financial condition of the VIE by limiting its ability to consolidate the financial results of the Chinese operating company into its own financial statements, as well as make the value of the shares of the VIE effectively worthless. Further, if Chinese officials determine that VIEs violate Chinese investment laws, the market value of the VIE would likely suffer significant, and possibly permanent effects, which could negatively impact the Fund’s net asset value and could result in substantial losses. VIEs are also subject to the investment risks associated with the underlying Chinese issuer or operating company. Chinese companies are not subject to the same degree of regulatory requirements or accounting standards and oversight as companies in more developed countries. There also may be significant obstacles to obtaining information necessary for investigations into or litigation against Chinese companies and VIEs, and shareholders may have limited legal remedies. U.S.-listed VIEs may be delisted if they do not meet U.S. accounting standards and auditor oversight requirements. Delisting would significantly decrease the liquidity and value of the securities, decrease the ability of the Fund to invest in such securities and may increase the costs borne by the Fund if required to seek alternative markets in which to invest in such securities. |
| Innovator Deepwater Frontier Tech ETF | Cyber Security Risk [Member] | |
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| Risk [Text Block] | Cyber Security Risk. The Fund is susceptible to 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 sub-adviser, as applicable, or issuers in which the Fund invests, can also subject the Fund to many of the same risks associated with direct cyber security breaches. While the Fund has established business continuity plans and risk management systems designed to reduce the risks associated with cyber security, there are inherent limitations in such plans and systems. Additionally, 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 Deepwater Frontier Tech ETF | 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 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 Deepwater Frontier Tech ETF | Portfolio Turnover Risk [Member] | |
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| Risk [Text Block] | Portfolio Turnover Risk. High portfolio turnover may result in increased transaction costs to the Fund, including brokerage commissions, dealer markups and other transaction costs on the sale of the securities and on reinvestment in other securities, as well as possible increased taxable distributions. |
| Innovator Deepwater Frontier Tech 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. 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 value 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 in greater than normal intra-day bid-ask spreads for Shares. Operational Risk. The Fund is subject to risks arising from various operational factors, including, but not limited to, human error, 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. Although the Fund and its investment adviser seek to reduce these operational risks through controls and procedures, there is no way to completely protect against such 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. Shares trade on the Exchange at market prices that may be below, at or above the Fund’s NAV. 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 APs 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 Deepwater Frontier Tech ETF | Volatility Risk [Member] | |
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| Risk [Text Block] | Volatility Risk. The value of a security may fluctuate due to factors affecting markets generally or particular industries. This volatility may affect the Fund’s NAV. Securities in the Fund’s portfolio may be subject to price volatility and their prices may be more or less volatile than the market as a whole. Events or financial circumstances affecting individual securities or sectors may increase the volatility of the Fund. Additionally, certain positions in the Fund may be susceptible to traders engaging in trading strategies that result in temporary swings and price movements. Such trading strategies could result in volatile trading prices of the Fund’s securities, and could adversely affect the Fund. |
| Innovator Equity Autocallable Income Strategy ETF | Risk Lose Money [Member] | |
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| Risk [Text Block] | You could lose money by investing in the Fund. |
| Innovator Equity Autocallable Income 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 Equity Autocallable Income Strategy ETF | Risk Nondiversified Status [Member] | |
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| 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 Equity Autocallable Income Strategy ETF | Investment Strategy Risk [Member] | |
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| Risk [Text Block] | Investment Strategy Risk. The Fund’s investment strategy subjects it to certain unique risks, which are detailed below. Autocallable Returns Risk. The Fund seeks to replicate the payout structure of autocallable notes through its investments in Autocallable Instruments. Autocallable notes differ in various ways from traditional debt securities. Autocallable notes do not guarantee a return of principal and limit the positive investment return that can be achieved through the operation of the Maturity Barrier Level, which if triggered by the Reference Asset, subjects the Fund to the losses of the Reference Asset. Further, the Fund does not participate in any upside gain of the Reference Asset and if the autocall feature of an instrument is triggered the Fund would forego any remaining Coupon Payments and may be unable to invest in another Autocallable Instrument with a similar level of risk and comparable return profile. The Coupon Payments of Autocallable Instruments are not linked to the performance of the Reference Asset at any time other than on the Maturity Date and Coupon Observation Dates. Moreover, because the Autocallable Instruments do not participate in any upside performance of the Reference Asset, the Fund’s positive returns are limited to the Coupon Payments. If the autocall feature is triggered, the Fund will forego future Coupon Payments and any positive returns may be limited. Further, the Fund may be unable to invest the proceeds in a subsequent Autocallable Instrument or one with similar terms, and therefore the Fund may not achieve its investment objective. Barrier Risk. The Autocallable Instruments utilize a Coupon Barrier Level and a Maturity Barrier Level, which each set forth the threshold amount of loss the Reference Asset may experience before the Fund will forfeit, Coupon Payments or a portion or all of the initial notional amount invested in such instrument, respectively. If the Coupon Barrier Level is breached on an Coupon Observation Date, the Fund will forfeit the Coupon Payment for sch period. It is possible that the Fund may not receive any Coupon Payments under an Autocallable Instrument over the duration of such instrument. If the Maturity Barrier Level is breached, the Fund will forfeit the percentage of the initial notional amount it invested that is equal to the entire amount of loss of the Reference Asset over the term of the Autocallable Instrument. Accordingly, the Fund could forfeit the entire notional exposure for any one Autocallable Instrument. Further, a shareholder may lose its entire investment in the Fund notwithstanding the sought-after limited downside protection intended to be provided by the Autocallable Instrument and the risk mitigation intended to be provided by the laddered portfolio. Call Risk. The Autocallable Instruments may be redeemed, or “called,” before their stated maturity date if the Autocallable Level is breached on a given Call Observation Date. In this event, the Fund will forego all future Coupon Payments associated with the Autocallable Instrument. If an instrument is called prior to its Maturity Date, the Fund’s income may decrease if the Fund must reinvest the proceeds into an Autocallable Instrument with a lower Coupon Rate. Further, in the event an Autocallable Instrument is called, there is no guarantee that the Fund will be able to invest in a new Autocallable Instrument or that such new instrument will have similar terms. Concentration Risk. Through its exposure to the securities that comprise the Reference Asset via the Autocallable Instruments, the Fund has exposure to the securities of a particular industry or group of industries to the same extent as the Reference Asset. 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. 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 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. Market Underperformance Risk. The Fund’s investment strategy may cause the Fund to underperform the Reference Asset or the U.S. Equity Index. The underperformance may be a result of management risk or the implementation of the Fund’s investment strategy. Money Market Funds Risk. Money market funds are subject to management fees and other expenses, and the Fund’s investments in money market funds will cause it to bear proportionately the costs incurred by the money market funds’ operations while simultaneously paying its own management fees and expenses. An investment in a money market fund is not a bank account and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency; it is possible to lose money by investing in a money market fund. To the extent that the Fund invests in money market funds, the Fund will be subject to the same risks that investors experience when investing in money market funds. These risks may include the impact of significant fluctuations in assets as a result of the cash sweep program or purchase and redemption activity in those funds. Reference Asset Risk. The Fund is exposed to the risks of the Reference Assets through the Autocallable Instruments. Such risks include those detailed below. 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 Reference Assets. 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. Significant Exposure Risk. To the extent that the Fund invests or has exposure to a significant percentage of its assets 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. The Reference Assets provide significant exposure to the following sectors: consumer discretionary, information technology and communication services. U.S. Government Securities Risk. The Fund invests in U.S. T-Bills, which are government debt instruments issued by the U.S. Department of Treasury and are backed by the full faith and credit of the United States government. 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. T-Bills 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. T-Bills 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 U.S. Treasuries to decline. U.S. Treasuries 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. |
| Innovator Equity Autocallable Income Strategy ETF | Derivatives Risk [Member] | |
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| Risk [Text Block] | Derivatives Risk. To employ the Fund’s investment strategy, the Fund utilizes derivative instruments, specifically, OTC swap agreements. 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: 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. Credit Risk. Credit risk is the risk that issuer or other obligated party (associated with the Fund’s investments in Autocallable Instruments) may be unable or unwilling to make Coupon Payments when due. In addition, the value of such investments may decline because of concerns about the issuer’s ability or unwillingness to make such payments. While the Fund will review the credit rating of the counterparties of the Autocallable Instruments to assess such party’s overall creditworthiness, any such rating will not provide an assessment of a specific financial obligation of the issuer, such as an Autocallable Instrument. That notwithstanding, the counterparties of the Autocallable Instruments will have an investment grade rating at the time of investment. While any such counterparty credit rating will assess such party’s overall creditworthiness, it will not provide an assessment of a specific financial obligation of the issuer, such as an Autocallable Instrument. FLEX Options Risk. The Fund may utilize FLEX Options as part of its investment strategies, which are customizable, exchange-traded option contracts that 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 price return 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 Fund utilizes European style FLEX Option contracts, which are exercisable at the strike price only on their expiration date. As a FLEX Option approaches its expiration date, its value typically increasingly moves with the value of the reference asset of such option. However, prior to such date, the value of the FLEX Options does 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). 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 value of the reference asset, changes in interest rates, changes in the actual and implied volatility of the reference asset and the remaining time to until the FLEX Options expire. Box Spread Risk. If one or more of the individual option positions that comprise a Box Spread are modified or closed separately prior to the option contract’s expiration, then the Box Spread may no longer effectively eliminate risk tied to underlying reference asset’s price movement. Furthermore, the Box Spread’s value is derived in the market and is in part based on the time until the options comprising the Box Spread expire and the prevailing market interest rates. The Fund’s ability to utilize Box Spreads effectively is dependent on the availability and willingness of other market participants to sell Box Spreads to the Fund at competitive prices. If the Box Spread does not perform as intended, the Fund could have exposure to the underlying reference asset of the options comprising the Box Spread. In such a scenario, the Fund would be subject to the risks of equity securities markets. Equity securities prices fluctuate for several reasons, including changes in investors’ perceptions of the financial condition of an issuer or the general condition of the relevant equity market, such as market volatility, or when political or economic events affecting an issuer occur. OTC Derivatives Risk. The Fund may utilize derivatives that are traded over-the-counter. In general, OTC derivatives are subject to the same risks as derivatives generally, as described herein. However, because OTC derivatives do not trade on an exchange, the parties to an OTC derivative face heightened levels of counterparty risk, liquidity risk and valuation risk. The Autocallable Instruments will be OTC derivatives, and therefore its counterparty risk will be higher if it only trades with a single or small number of counterparties. The secondary market for OTC derivatives may not be as deep as for other instruments and such instruments may experience periods of illiquidity. In addition, some OTC derivatives may be complex and difficult to value. If the Fund fails to meet its payment or collateral delivery obligations under an Autocallable Instrument or some other termination or default event occurs, the counterparty to the contract could close out the contract and the Fund could experience significant losses and fail to achieve its investment objective. Swap Agreements Risk. The Fund expects to principally use swap agreements as the Autocallable Instruments. Swap agreements are generally traded in OTC markets and have only recently become subject to regulation by the Commodity Futures Trading Commission (“CFTC”). CFTC rules, however, do not cover all types of swap agreements. Investors, therefore, may not receive the protection of CFTC regulation or the statutory scheme of the Commodity Exchange Act of 1936, as amended (the “Commodity Exchange Act”) in connection with the Fund’s usage of swap agreements. The lack of regulation in these markets could expose investors to significant losses under certain circumstances, including in the event of trading abuses or financial failure by participants. Unlike in futures contracts, the counterparty to uncleared OTC swap agreements is generally a single bank or other financial institution, rather than a clearing organization backed by a group of financial institutions. As a result, the Fund is subject to increased counterparty risk with respect to the amount it expects to receive from counterparties to uncleared swap agreements. If a counterparty becomes bankrupt or otherwise fails to perform its obligations due to financial difficulties, the Fund could suffer significant losses on these contracts and the value of an investor’s investment in the Fund may decline. OTC swap agreements of the type that may be utilized by the Fund are less liquid than futures contracts because they are not traded on an exchange, do not have uniform terms and conditions, and are generally entered into based upon the creditworthiness of the parties and the availability of credit support, such as collateral, and in general, are not transferable without the consent of the counterparty. Swap agreements are also subject to the risk of imperfect correlation between the value of the reference asset underlying the agreement and the swap agreement itself. Leverage inherent in derivatives will tend to magnify the Fund’s gains and losses. Moreover, if a particular swap agreement is terminated or autocalled, the Fund may be unable to enter into another swap agreement or invest in other derivatives to achieve the desired exposure consistent with the Fund’s investment objective. This, in turn, may prevent the Fund from achieving its investment objective. |
| Innovator Equity Autocallable Income Strategy ETF | Distribution Tax Risk [Member] | |
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| Risk [Text Block] | Distribution Tax Risk. The Fund currently expects to make distributions on a regular basis. While the Fund will normally pay its income as distributions, the Fund’s distributions may exceed the Fund’s income and gains for the Fund’s taxable year. The Fund may be required to reduce its distributions if it has insufficient income. Additionally, there may be times the Fund needs to sell securities when it would not otherwise do so and could cause the distributions from that sale to constitute return of capital. Distributions in excess of the Fund’s current and accumulated earnings and profits will be treated as a return of capital. Return of capital distributions do not represent income or gains generated by the Fund’s investment activities and should not be interpreted by shareholders as such. Distributions in excess of the Fund’s minimum distribution requirements, but not in excess of the Fund’s earnings and profits, will be taxable to Fund shareholders and will not constitute nontaxable returns of capital. A return of capital distribution generally will not be taxable but will reduce the shareholder’s cost basis and will result in a higher capital gain or lower capital loss when those Fund shares on which the distribution was received are sold. Once a Fund shareholder’s cost basis is reduced to zero, further distributions will be treated as capital gain, if the Fund shareholder holds shares of the Fund as capital assets. Additionally, any capital returned through distributions will be distributed after payment of Fund fees and expenses. Because the Fund’s distributions may consist of return of capital, the Fund may not be an appropriate investment for investors who do not want their principal investment in the Fund to decrease over time or who do not wish to receive return of capital in a given period. 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. Substantial uncertainties exist related to the calculation of income from the Synthetic Autocallable Contracts. The Fund intends to calculate the income from the contacts using the IRS rules for notional principal contracts. However, the application of such rules to the Synthetic Autocallable Contracts may be subject to challenge or varying interpretation. If the Fund is incorrect in its calculation of income, the Fund may be required to make an extraordinary distribution to distribute prior undistributed income or recharacterize prior distributions. |
| Innovator Equity Autocallable Income Strategy ETF | 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 Equity Autocallable Income Strategy ETF | 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 the Fund’s 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 Equity Autocallable Income Strategy 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 Upside 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 Equity Autocallable Income Strategy ETF | Tax Risk [Member] | |
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| Risk [Text Block] | Tax Risk. The Fund intends to qualify as a “regulated investment company” (“RIC”) under Subchapter M of the Code. The federal income tax treatment of the securities in which the Fund may invest, including the Fund’s usage of Autocallable Instruments, may not be clear. Any such failure to comply with the rules applicable to RICs could cause the Fund to fail to qualify as such. To qualify and maintain its status as a RIC, the Fund must meet certain income, diversification and distributions tests. 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. If the Fund were to fail to meet the qualifying income test or asset diversification test and fail to qualify as a RIC, it would be taxed in the same manner 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. Additionally, the federal income tax treatment of certain aspects of the proposed operations of the Fund are not entirely clear and may have adverse tax consequences, including but not limited to the Fund losing its status as a RIC. To maintain its status as a RIC, the Fund must distribute 90% of its investment company taxable income annually. In addition, to avoid a non-deductible excise tax, the Fund must distribute 98% of its ordinary income and 98.2% of its capital gain net income. Separately, depending upon the circumstances, sales 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. |
| Innovator Equity Autocallable Income Strategy ETF | Valuation Risk [Member] | |
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| 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 investments will become more difficult. In market environments where there is reduced availability of reliable objective pricing data, the judgment of the 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 Equity Premium Income - Daily PutWrite ETF | Risk Lose Money [Member] | |
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| Risk [Text Block] | You could lose money by investing in the Fund. |
| Innovator Equity Premium Income - Daily PutWrite 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 Equity Premium Income - Daily PutWrite ETF | Risk Nondiversified Status [Member] | |
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| 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 Equity Premium Income - Daily PutWrite ETF | Investment Strategy Risk [Member] | |
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| Risk [Text Block] | Investment Strategy Risk. The Fund’s investment strategy subjects it to certain unique risks, which are detailed below. Equity Securities Risk. The Fund has exposure to the equity securities markets because it holds equity securities directly and indirectly through its exposure to SPX provided by the Options Strategy. 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 that the Fund holds as well as the constituents of SPX. Additionally, market disruptions and regulatory restrictions could impact the equity securities held by the Fund, and such restrictions could adversely impact the performance of the Fund. Income Risk. The Fund’s income received, and therefore distributed, may vary and decline due to market conditions, among other factors. The Fund receives income from any dividends received through its investments in components of the U.S. Equity Index, income received from the Options Strategy, as well as the U.S. T-Bills and money market funds. If the income received from these investments decreases, the Fund will distribute less income. Large Capitalization Companies Risk. The Fund, directly through the Equity Portfolio and indirectly through exposure to SPX, 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. 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. Market Underperformance Risk. The Fund’s investment strategy may cause the Fund to underperform the U.S. Equity Index and/or similarly situated funds. The underperformance may be a result of management risk or the implementation of the Fund’s investment strategy, including, but not limited to, the weights of the equity securities in the Equity Portfolio and the Options Strategy. Further, the Daily Put Contracts utilized by the Fund provide 100% notional exposure to the Fund’s assets. To the extent the Daily Put Contracts sustain any losses, those losses may exceed those of SPX and will be realized on a daily basis with no opportunity to recapture such losses via the option contracts held by the Fund. Such factors may also cause the Fund to underperform the U.S. Equity Index and/or similarly situated funds. Money Market Funds Risk. Money market funds are subject to management fees and other expenses, and the Fund’s investments in money market funds will cause it to bear proportionately the costs incurred by the money market funds’ operations while simultaneously paying its own management fees and expenses. An investment in a money market fund is not a bank account and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency; it is possible to lose money by investing in a money market fund. To the extent that the Fund invests in money market funds, the Fund will be subject to the same risks that investors experience when investing in money market funds. These risks may include the impact of significant fluctuations in assets as a result of the cash sweep program or purchase and redemption activity in those funds. Put-Write Risk. Put option contracts may be subject to volatile swings in price influenced by the underlying reference asset. Although the Fund receives the premiums from the put option contracts utilized by the Options Strategy, the losses experienced by the Fund if the level of SPX falls below the strike price may be greater than the gains to the Fund from the receipt of the option premiums and may be more than the losses of SPX. Additionally, market conditions may negatively impact the amount of premiums received from selling put-write option contracts or impact the strike price of the option contracts, subjecting the Fund to more risk of loss. Suitability Risk. The Fund has characteristics unlike many other traditional investment products and may not be suitable for all investors. The Fund may only be suitable for knowledgeable investors who understand how the Fund operates. The Fund is not intended to be used and is not appropriate for investors who do not actively monitor and manage their portfolios. U.S. Treasury Bills Risk. The Fund invests in U.S. T-Bills, which are government debt instruments issued by the U.S. Department of Treasury and are backed by the full faith and credit of the United States government. 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. T-Bills 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. T-Bills 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 U.S. Treasuries to decline. U.S. Treasuries 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. Upside Participation Risk. The Fund’s exposure to SPX that is provided by the Options Strategy has no upside participation. Therefore, any upside potential for the Fund will be limited to gains of the Equity Portfolio, plus any income generated through dividends and premiums. Because the Fund only invests a portion of its assets in the U.S. Equity Index directly, its upside participation in the returns of the U.S. Equity Index is limited. Further, because the Fund uses an optimized investment strategy in the implementation of the Equity Portfolio, the Fund will weight securities differently than the U.S. Equity Index, which may cause the Fund to underperform or overperform the U.S. Equity Index based on those different weightings. |
| Innovator Equity Premium Income - Daily PutWrite ETF | Derivatives Risk [Member] | |
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| Risk [Text Block] | 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 below risks, among others, associated with its use of derivative instruments. Counterparty Risk. Counterparty risk is the risk an issuer, guarantor or counterparty of a security is unable or unwilling to meet its obligation on the security. In the event that the counterparty becomes insolvent or is otherwise unable to meet its settlement obligations, the Fund could suffer significant losses. If the Fund is unable to obtain a suitable counterparty or if no counterparties are available to the Fund, the Fund may not be able to achieve its objective. Correlation Risk. Prior to the expiration date of the put option contract, its value 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 options, among others. Additionally, the Fund utilizes an optimization strategy to replicate the returns of the U.S Equity Index in the Equity Portfolio. The Fund may not be able to achieve a perfect degree of correlation to the U.S. Equity Index through implementing this strategy. Any amount of such non-correlation may adversely impact the Fund’s returns. Equity-Linked Notes Risk. The Fund may invest in ELNs to implement the Options Strategy. Investing in ELNs may be more costly to the Fund than if the Fund had invested in the underlying instruments directly. Investments in ELNs often have risks similar to the underlying instruments, which include market risk. In addition, since ELNs are in note form, ELNs are subject to risks of debt securities, such as credit risk and counterparty risk (each of which is described further below). Should the prices of the underlying instruments move in an unexpected manner, the Fund may not achieve the anticipated benefits of an investment in an ELN, and may realize losses, which could be significant and could include the Fund’s entire principal investment. The ELNs in which the Fund may invest would be privately negotiated over-the-counter instruments, and not traded on an exchange which subjects them to liquidity and valuation risk and may make ELNs difficult to sell and value. The ELNs may have limited or no secondary markets, which may cause liquidity issues if the Fund tries to sell such ELN. A lack of liquidity may also cause the value of the ELNs to decline. In addition, ELNs may exhibit price behavior that does not correlate with the underlying securities. If the Fund is unable to obtain a suitable counterparty, the Fund may not be able to achieve its investment objective. Unlike a direct investment in equity securities, ELNs typically involve a term or expiration date, potentially increasing the Fund’s turnover rate, transaction costs and tax liability. The ELNs in which the Fund may invest may not be given a credit rating, and the Fund will be reliant on the Adviser and Sub-Adviser to evaluate the creditworthiness of the underlying security. The Fund’s ELN investments would subject it to the risk that issuers and/or counterparties will fail to make payments when due or default completely, or may go bankrupt. The value of the Fund’s ELN investments would be adversely affected if the issuer fails to deliver on its obligation, is subject to an actual or perceived deterioration in their credit quality or files for bankruptcy. In the event an issuer files for bankruptcy, the debt holders of such issuer may not recover its principal, may experience a long delay in recovering its investment and may not receive interest during the delay. To the extent the Fund invests in ELNs, the issuers of such ELNs would have an investment grade rating at the time of investment. While any such issuer credit rating will assess the ELN issuer’s overall creditworthiness, it will not provide an assessment of a specific financial obligation of the issuer, such as an ELN. For additional information see “Counterparty Risk” and “Credit Risk”. Further, the Fund may be limited in the counterparties it can transact with via ELN investments due to regulatory restrictions, which may limit the number of available ELNs the Fund may invest in, and adversely impact the Fund. Restricted Securities Risk. The ELNs in which the Fund may invest may be considered “restricted securities.” Restricted securities are securities that cannot be offered for public resale unless registered under the applicable securities laws or that have a contractual restriction that prohibits or limits their resale. Restricted securities include private placement securities that have not been registered under the applicable securities laws, such as Rule 144A securities, and are generally subject to strict restrictions on resale. Restricted securities may be illiquid as they generally are not listed on an exchange and may have no active trading market. That notwithstanding, the ELNs in which the Fund may invest would be redeemable by the Fund (meaning the Fund may liquidate its position directly with the ELN before the stated maturity date) and callable by the issuer (meaning that the ELN may repurchase the ELN from Fund before the stated maturity date). 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 arise as a result of, among other things, market turmoil, 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, and liquid investments may become less liquid after being purchased by the Fund, particularly during periods of market turmoil. In the event that trading in the Daily Put Contracts is limited or absent, the value of the Fund’s option contracts may decrease. There is no guarantee that a liquid secondary trading market will exist for the Daily Put Contracts. In a less liquid market for the Daily Put Contracts, terminating such contracts 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 Daily Put Contracts may more significantly impact the price in a less liquid market. A less liquid trading market may adversely impact the value of the Daily Put Contracts and the value of your investment. 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 to effectively implement the option contracts 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, or in interest rates, including the implied volatility, which in turn are affected by fiscal and monetary policies and by national and international political and economic events. 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, which cannot be assured. The Fund enters into option contracts in accordance with Rule 18f-4 under the 1940 Act (“Rule 18f-4”). Accordingly, the Fund is required to, among other things, adopt and implement a written derivatives risk management program and comply with limitations on risks relating to its derivatives transactions. 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 its ability to implement its principal investment strategies. Swap Agreements Risk. The Fund may utilize swap agreements in to implement the Options Strategy. Swap agreements are generally traded in OTC markets and have only recently become subject to regulation by the Commodity Futures Trading Commission (“CFTC”). CFTC rules, however, do not cover all types of swap agreements. Investors, therefore, may not receive the protection of CFTC regulation or the statutory scheme of the Commodity Exchange Act of 1936, as amended (the “Commodity Exchange Act”) in connection with the Fund’s usage of swap agreements. The lack of regulation in these markets could expose investors to significant losses under certain circumstances, including in the event of trading abuses or financial failure by participants. Unlike in futures contracts, the counterparty to uncleared OTC swap agreements is generally a single bank or other financial institution, rather than a clearing organization backed by a group of financial institutions. As a result, the Fund is subject to increased counterparty risk with respect to the amount it expects to receive from counterparties to uncleared swap agreements. If a counterparty becomes bankrupt or otherwise fails to perform its obligations due to financial difficulties, the Fund could suffer significant losses on these contracts and the value of an investor’s investment in the Fund may decline. OTC swap agreements of the type that may be utilized by the Fund are less liquid than futures contracts because they are not traded on an exchange, do not have uniform terms and conditions, and are generally entered into based upon the creditworthiness of the parties and the availability of credit support, such as collateral, and in general, are not transferable without the consent of the counterparty. Swap agreements are also subject to the risk of imperfect correlation between the value of the reference asset underlying the agreement and the swap agreement itself. Leverage inherent in derivatives will tend to magnify the Fund’s gains and losses. Moreover, if a particular swap agreement is terminated, the Fund may be unable to enter into another swap agreement or invest in other derivatives to achieve the desired exposure consistent with the Fund’s investment objective. This, in turn, may prevent the Fund from achieving its investment objective. |
| Innovator Equity Premium Income - Daily PutWrite ETF | 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, 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 Equity Premium Income - Daily PutWrite 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 Equity Premium Income - Daily PutWrite 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 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 and the 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. Shares trade on the Exchange at market prices that may be below, at or above the Fund’s NAV. 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. 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 Equity Premium Income - Daily PutWrite ETF | Security Issuer Risk [Member] | |
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| Risk [Text Block] | 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 Equity Premium Income - Daily PutWrite ETF | 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, and accordingly the Fund must satisfy certain income, asset diversification and distribution requirements each year. The income requirement will be satisfied if the Fund must derive at least 90% of its gross income each taxable year from certain qualifying sources of income. The diversification requirement will be satisfied if (i) 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, and (ii) no more than 25% of the value of the Fund’s total assets is invested in the securities (other than U.S. government securities or securities of other RICs) of one issuer, of two or more issuers that are controlled, as determined under applicable provision of the Code, by the Fund and that are engaged in the same or similar or related trades or businesses or of certain “qualified publicly traded partnerships.” The Fund will also need to manage its exposure to derivatives counterparties for purposes of satisfying the diversification test. The distribution requirement is satisfied if the Fund distributes, 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). If the Fund were to fail to meet any of the requirements mentioned above, it would be taxed in the same manner as an ordinary corporation, and as a result, distributions to its shareholders would not be deductible by the Fund in computing its taxable income, which would adversely affect the Fund’s performance. Additionally, the U.S. 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. 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. The Fund’s options 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. Certain positions held by the Fund may be “section 1256 contracts” under the Code, requiring the Fund to mark to market such positions with any resulting gains or losses being treated as 60% long-term and 40% short-term capital gains or losses. |
| Innovator Equity Premium Income - Daily PutWrite ETF | Valuation Risk [Member] | |
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| 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 ability of the Fund to value its investments may become more difficult and the judgment of the Fund’s investment adviser (employing the fair value procedures adopted by the Board of Trustees of the Trust) may play a greater role in the valuation of the Fund’s holdings due to reduced availability of reliable objective pricing data. Consequently, while such determinations may be made in good faith, it may nevertheless be more difficult for the Fund to accurately assign a daily value. Independent market quotations for certain investments held by the Fund may not be readily available, and such investments may be fair valued or valued by a pricing service at an evaluated price. These valuations involve subjectivity and different market participants may assign different prices to the same investment. As a result, there is a risk that the Fund may not be able to sell an investment at the price assigned to the investment by the Fund. |
| Innovator Gradient Tactical Rotation Strategy ETF | Risk Lose Money [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | You could lose money by investing in the Fund. |
| Innovator Gradient Tactical Rotation 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 Gradient Tactical Rotation Strategy ETF | Risk Nondiversified Status [Member] | |
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| 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 Gradient Tactical Rotation Strategy ETF | Investment Strategy Risk [Member] | |
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| Risk [Text Block] | Investment Strategy Risk. The Fund’s investment strategy subjects it to certain unique risks, which are detailed below. High Beta Risk. High beta stocks are more sensitive to changes in the market, and thus may be more volatile based on historical market data, compared to the overall market. A portfolio composed of high beta stocks may be subject to greater swings in value and may change unpredictably, thus affecting the value of such securities and, consequently, the value of the Fund. Low Volatility Risk. While low volatility stocks are seen as having a lower risk profile than the overall markets, they are still subject to the general risks of common stocks. However, a portfolio composed of low volatility stocks may not produce investment exposure that has lower variability to changes in such stocks’ price levels. As such, low volatility stocks may underperform the broader market during periods of rapidly rising stock prices. Momentum Investing Risk. A momentum style of investing emphasizes investing in securities that have had stronger recent performance compared to other securities, on the basis that these securities will continue to increase in value. Securities that previously exhibited relatively high momentum characteristics may not experience positive momentum or may experience more volatility than the market as a whole. High momentum may also be a sign that the securities’ prices have peaked, and therefore the returns of such securities may be less than the returns of other styles of investing. Momentum can change quickly, and these securities may experience rapid and substantial declines in value. Additionally, there may be periods when the price momentum style of investing is out of favor and the investment performance of the Fund may suffer. Performance Variability Risk. The performance of the Fund and the Market Segment Indices that represent the global equity market segments the Fund invests in may vary for a variety of reasons. This performance variability may occur because of differences, if any, between the equity securities held in the Fund’s portfolio and those included in a Market Segment Index to the extent the Fund invests in a smaller portion of securities that comprise a Market Segment Index. Performance variability may also occur due to pricing differences, transaction costs incurred by the Fund, the Fund’s holding of cash or cash equivalents, acceptance of custom baskets or the costs to the Fund of complying with various new or existing regulatory requirements, among other reasons. This risk may be heightened during times of increased market volatility or other unusual market conditions. Performance variability may also occur because the Fund incurs fees and expenses, while the equity indices do not. When the Fund rebalances its portfolio, any transaction costs and market exposure arising from such portfolio rebalancing will be borne by the Fund and its shareholders. Due to the time required for the Sub-Advisers to implement the Fund’s investment program on a monthly basis, the Fund’s portfolio may not always correlate to the securities of the Market Segment Index that was selected based on the strategy signal. Errors with respect to the quality, accuracy and completeness of the data used to compile the equity indices may occur from time to time and may not be identified and corrected by the Fund for a period of time or at all. Equity Securities Risk. Equity securities, including the Fund’s investments in 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 stockholders may be subject to greater risks than holders of debt securities or preferred stock because common stockholders claims are subordinated to those of holders of debt securities and preferred stocks upon the bankruptcy of an issuer. The value of Shares will fluctuate with changes in the value of the equity securities the Fund invests in. Non-U.S. Securities Risk. Investments in securities of non-U.S. companies (particularly in emerging markets) present risks beyond those of securities of U.S. issuers and can be more volatile than investments in U.S. companies. Risks of investing in securities of foreign companies include: different accounting standards; expropriation, nationalization or other adverse political or economic developments; currency devaluation, blockages or transfer restrictions; changes in foreign currency exchange rates; taxes; restrictions on non-U.S. investments and exchange of securities; and less government supervision and regulation of issuers in non-U.S. countries. Further, other diplomatic, political or economic developments can affect investments in foreign companies. Prices of non-U.S. securities may also be more volatile. Finally, the value of securities denominated in foreign currencies, and of dividends from such securities, can change significantly when foreign currencies strengthen or weaken relative to the U.S. dollar. Depositary Receipts Risk. The Fund invests in depositary receipts which are currently expected to be comprised of American Depositary Receipts (ADRs) and Global Depositary Receipts (GDRs). Depositary receipts, such as ADRs or GDRs, may be subject to certain of the risks associated with direct investments in the securities of foreign companies, such as currency, political, economic and market risks, because their values depend on the performance of the non-dollar denominated underlying foreign securities. Certain countries may limit the ability to convert depositary receipts into the underlying foreign securities and vice versa, which may cause the securities of the foreign company to trade at a discount or premium to the market price of the related depositary receipts. Depositary receipts may be purchased through “sponsored” or “unsponsored” facilities. A sponsored facility is established jointly by a depositary and the issuer of the underlying security. A depositary may establish an unsponsored facility without participation by the issuer of the deposited security. Unsponsored receipts may involve higher expenses and may be less liquid. Holders of unsponsored depositary receipts generally bear all the costs of such facilities, and the depositary of an unsponsored facility frequently is under no obligation to distribute shareholder communications received from the issuer of the deposited security or to pass through voting rights to the holders of such receipts in respect of the deposited securities. Emerging Markets Risk. Emerging markets are generally more volatile than markets of more developed countries and may be more likely to experience inflation risk, political turmoil and rapid changes in economic conditions than more developed markets. 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. Emerging markets often have less uniformity in accounting and reporting requirements, unreliable securities valuation and greater risk with custody of securities than developed markets. Additionally, emerging markets often have greater risk of capital controls through such measures as taxes or interest rate control than developed markets. Certain emerging market countries may also lack the required infrastructure to attract large amounts of non-U.S. trade and investment. Additionally, the rights and remedies available to investors in emerging market securities may be more limited than those available for investments in more developed markets. Finally, the limitations associated with investments in emerging market companies could impact the Fund’s ability to achieve its investment objective. Currency Risk. The Fund’s direct investments in foreign-listed securities will be denominated in foreign currency. Changes in currency exchange rates affect the value of investments denominated in a foreign currency, and therefore the value of such investments in the Fund’s portfolio. The Fund’s NAV could decline if a currency to which the Fund has exposure depreciates against the U.S. dollar 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. As a result, the value of an investment in the Fund may change quickly and without warning. Exchange-Traded Funds Risk. The Fund may invest in shares of other ETFs, and the Fund will be subject to the risks associated with such other ETFs’ investments in connection therewith. Additionally, investing in underlying ETFs subjects the Fund to the same structural risks faced by an investor purchasing shares of the Fund, including premium/discount risk and trading issues risk. As a shareholder in another ETF, the Fund bears its proportionate share of the ETF’s expenses, subjecting Fund shareholders to duplicative expenses. Management Risk. The Fund is subject to management risk because it is an actively managed portfolio. The Sub-Advisers 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. 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 Gradient Tactical Rotation Strategy ETF | Cyber Security Risk [Member] | |
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| Risk [Text Block] | Cyber Security Risk. The Fund is susceptible to 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 sub-adviser, as applicable, or issuers in which the Fund invests, can also subject the Fund to many of the same risks associated with direct cyber security breaches. While the Fund has established business continuity plans and risk management systems designed to reduce the risks associated with cyber security, there are inherent limitations in such plans and systems. Additionally, 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 Gradient Tactical Rotation Strategy ETF | 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 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 Gradient Tactical Rotation Strategy ETF | Portfolio Turnover Risk [Member] | |
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| Risk [Text Block] | Portfolio Turnover Risk. The Fund may be subject to high portfolio turnover due to the Fund’s monthly rebalance and reconstitutions. High portfolio turnover (higher than 100%) may result in increased transaction costs to the Fund, including brokerage commissions, dealer markups and other transaction costs on the sale of the securities and on reinvestment in other securities, as well as possible increased taxable distributions. |
| Innovator Gradient Tactical Rotation Strategy 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. 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 value 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 in greater than normal intra-day bid-ask spreads for Shares. 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. Shares trade on the Exchange at market prices that may be below, at or above the Fund’s NAV. 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 APs 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 IBD(R) 50 ETF | Risk Lose Money [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | You could lose money by investing in the Fund. |
| Innovator IBD(R) 50 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 IBD(R) 50 ETF | Investment Strategy Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Investment Strategy Risk. The Fund’s investment strategy subjects it to certain unique risks, which are detailed below. Concentration Risk. To the extent that the Index concentrates in the securities of issuers in a particular industry or sector, the Fund will also concentrate its investments to approximately the same extent. The Fund may be susceptible to loss due to adverse occurrences to the extent that the Fund’s investments are concentrated in a particular issuer or issuers, region, market, industry, group of industries, sector or asset class. Currency Risk. Changes in currency exchange rates affect the value of investments denominated in a foreign currency, and therefore the value of such investments in the Fund’s portfolio. The Fund’s NAV could decline if a currency to which the Fund has exposure depreciates against the U.S. dollar 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. As a result, the value of an investment in the Fund may change quickly and without warning. Depositary Receipts Risk. Depositary receipts may be subject to certain of the risks associated with direct investments in the securities of foreign companies, such as currency, political, economic and market risks, because their values depend on the performance of the non-dollar denominated underlying foreign securities. Certain countries may limit the ability to convert depositary receipts into the underlying foreign securities and vice versa, which may cause the securities of the foreign company to trade at a discount or premium to the market price of the related depositary receipts. Depositary receipts may be purchased through “sponsored” or “unsponsored” facilities. A sponsored facility is established jointly by a depositary and the issuer of the underlying security. A depositary may establish an unsponsored facility without participation by the issuer of the deposited security. Unsponsored receipts may involve higher expenses and may be less liquid. Holders of unsponsored depositary receipts generally bear all the costs of such facilities, and the depositary of an unsponsored facility frequently is under no obligation to distribute shareholder communications received from the issuer of the deposited security or to pass through voting rights to the holders of such receipts in respect of the deposited securities. Emerging Markets Risk. Emerging markets are generally more volatile than markets of more developed countries and may be more likely to experience inflation risk, political turmoil and rapid changes in economic conditions than more developed markets. 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. Emerging markets often have less uniformity in accounting and reporting requirements, unreliable securities valuation and greater risk with custody of securities than developed markets. Additionally, emerging markets often have greater risk of capital controls through such measures as taxes or interest rate control than developed markets. Certain emerging market countries may also lack the required infrastructure to attract large amounts of non-U.S. trade and investment. Additionally, the rights and remedies available to investors in emerging market securities may be more limited than those available for investments in more developed markets. Finally, the limitations associated with investments in emerging market companies could 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 Fund invests in. Growth Risk. Growth stocks may be out of favor or may not produce the best results over short or longer time periods. They may also increase the volatility of the Fund’s share price. Growth stocks tend to be more expensive relative to their earnings or assets compared to other types of stocks. These companies tend to invest a high portion of earnings in their businesses and may lack the dividends of value stocks that can cushion stock prices in falling markets. As a result, growth stocks tend to be sensitive to changes in their earnings and more volatile than other types of stocks. Index Provider Risk. The Fund seeks to achieve returns that generally correspond, before fees and expenses, to the performance of their Index, as published by their Index Provider. There is no assurance that the Index Provider will compile its Index accurately, or that the Index will be determined, composed or calculated accurately. While the Index Provider gives descriptions of what the Index is designed to achieve, the Index Provider does not provide any warranty or accept any liability in relation to the quality, accuracy or completeness of data in its indices, and it does not guarantee that its Index will be in line with its methodology. Information Technology Companies Risk. The Fund has significant exposure to companies 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. Non-U.S. Investment Risk. Investments in securities of non-U.S. companies (particularly in emerging markets) present risks beyond those of securities of U.S. issuers and can be more volatile than investments in U.S. companies. Risks of investing in securities of foreign companies include: different accounting standards; expropriation, nationalization or other adverse political or economic developments; currency devaluation, blockages or transfer restrictions; changes in foreign currency exchange rates; taxes; restrictions on non-U.S. investments and exchange of securities; and less government supervision and regulation of issuers in non-U.S. countries. Further, other diplomatic, political or economic developments can affect investments in foreign companies. Prices of non-U.S. securities may also be more volatile. Finally, the value of securities denominated in foreign currencies, and of dividends from such securities, can change significantly when foreign currencies strengthen or weaken relative to the U.S. dollar. Passive Investment Risk. The Fund invests in the securities included in the Index regardless of their investment merit. The Fund does not attempt to outperform the Index or take defensive positions in declining markets, except in connection with the Index’s risk reduction mechanism. As a result, the Fund’s performance may be adversely affected by a general decline in the market segments relating to the Index. 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. Small- and Mid-Capitalization Company Risk. Generally, small- or mid-capitalization companies, which are often less seasoned, have more potential for rapid growth. However, they often involve greater risk than large cap companies and these risks are passed on to funds that invest in them. These companies may not have the management experience, financial resources, product diversification and competitive strengths of larger companies. Tracking Error Risk. The Fund’s return may not match the return of the Index for a number of reasons. For example, the Fund incurs operating expenses not applicable to the Index, and incurs costs in buying and selling securities, especially when rebalancing the Fund’s securities holdings to reflect changes in the composition of the Index. In addition, the performance of the Fund and the Index may vary due to asset valuation differences and differences between the Fund’s portfolio and the Index resulting from legal restrictions, cost or liquidity constraints. 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. |
| Innovator IBD(R) 50 ETF | Cyber Security Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Cyber Security Risk. The Fund is susceptible to 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 Sub-Adviser, as applicable, or issuers in which the Fund invests, can also subject the Fund to many of the same risks associated with direct cyber security breaches. While the Fund has established business continuity plans and risk management systems designed to reduce the risks associated with cyber security, there are inherent limitations in such plans and systems. Additionally, 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 IBD(R) 50 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. 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 IBD(R) 50 ETF | Portfolio Turnover Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Portfolio Turnover Risk. The Fund may be subject to high portfolio turnover due to the Index’s weekly rebalances and reconstitutions. High portfolio turnover (higher than 100%) may result in increased transaction costs to the Fund, including brokerage commissions, dealer markups and other transaction costs on the sale of the securities and on reinvestment in other securities, as well as possible increased taxable distributions. |
| Innovator IBD(R) 50 ETF | 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. 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 value 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 in greater than normal intra-day bid-ask spreads for Shares. Operational Risk. The Fund is subject to risks arising from various operational factors, including, but not limited to, human error, 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. Although the Fund and its investment adviser seek to reduce these operational risks through controls and procedures, there is no way to completely protect against such 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. Shares trade on the Exchange at market prices that may be below, at or above the Fund’s NAV. 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 APs 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 IBD Breakout Opportunities ETF | Risk Lose Money [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | You could lose money by investing in the Fund. |
| Innovator IBD Breakout Opportunities 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 IBD Breakout Opportunities 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”) applicable to a company seeking to qualify as a regulated investment company (“RIC”). 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 IBD Breakout Opportunities ETF | Investment Strategy Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Investment Strategy Risk. The Fund’s investment strategy subjects it to certain unique risks, which are detailed below. Concentration Risk. To the extent that the Index concentrates in the securities of issuers in a particular industry or sector, the Fund will also concentrate its investments to approximately the same extent. The Fund may be susceptible to loss due to adverse occurrences to the extent that the Fund’s investments are concentrated in a particular issuer or issuers, region, market, industry, group of industries, sector or asset class. Consumer Discretionary Companies Risk. The Fund has significant exposure to companies in the consumer discretionary sector. Consumer discretionary companies, such as retailers, media companies and consumer services companies, provide non-essential goods and services. These companies manufacture products and provide discretionary services directly to the consumer, and the success of these companies is tied closely to the performance of the overall domestic and international economy, interest rates, competition and consumer confidence. Success depends heavily on disposable household income and consumer spending. Changes in demographics and consumer tastes can also affect the demand for, and success of, consumer discretionary products in the marketplace. Currency Risk. Changes in currency exchange rates affect the value of investments denominated in a foreign currency, and therefore the value of such investments in the Fund’s portfolio. The Fund’s NAV could decline if a currency to which the Fund has exposure depreciates against the U.S. dollar 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. As a result, the value of an investment in the Fund may change quickly and without warning. Depositary Receipts Risk. Depositary receipts may be subject to certain of the risks associated with direct investments in the securities of foreign companies, such as currency, political, economic and market risks, because their values depend on the performance of the non-dollar denominated underlying foreign securities. Certain countries may limit the ability to convert depositary receipts into the underlying foreign securities and vice versa, which may cause the securities of the foreign company to trade at a discount or premium to the market price of the related depositary receipts. Depositary receipts may be purchased through “sponsored” or “unsponsored” facilities. A sponsored facility is established jointly by a depositary and the issuer of the underlying security. A depositary may establish an unsponsored facility without participation by the issuer of the deposited security. Unsponsored receipts may involve higher expenses and may be less liquid. Holders of unsponsored depositary receipts generally bear all the costs of such facilities, and the depositary of an unsponsored facility frequently is under no obligation to distribute shareholder communications received from the issuer of the deposited security or to pass through voting rights to the holders of such receipts in respect of the deposited securities. Emerging Markets Risk. Emerging markets are generally more volatile than markets of more developed countries and may be more likely to experience inflation risk, political turmoil and rapid changes in economic conditions than more developed markets. 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. Emerging markets often have less uniformity in accounting and reporting requirements, unreliable securities valuation and greater risk with custody of securities than developed markets. Additionally, emerging markets often have greater risk of capital controls through such measures as taxes or interest rate control than developed markets. Certain emerging market countries may also lack the required infrastructure to attract large amounts of non-U.S. trade and investment. Additionally, the rights and remedies available to investors in emerging market securities may be more limited than those available for investments in more developed markets. Finally, the limitations associated with investments in emerging market companies could 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 Fund invests in. Growth Risk. Growth stocks may be out of favor or may not produce the best results over short or longer time periods. They may also increase the volatility of the Fund’s share price. Growth stocks tend to be more expensive relative to their earnings or assets compared to other types of stocks. These companies tend to invest a high portion of earnings in their businesses and may lack the dividends of value stocks that can cushion stock prices in falling markets. As a result, growth stocks tend to be sensitive to changes in their earnings and more volatile than other types of stocks. Index Provider Risk. The Fund seeks to achieve returns that generally correspond, before fees and expenses, to the performance of the Index, as published by the Index Provider. There is no assurance that the Index Provider will compile the Index accurately, or that the Index will be determined, composed or calculated accurately. While the Index Provider gives descriptions of what the Index is designed to achieve, the Index Provider does not provide any warranty or accept any liability in relation to the quality, accuracy or completeness of data in its indices, and it does not guarantee that the Index will be in line with its methodology. Industrials Companies Risk. The Fund has significant exposure to companies in the industrials sector. The value of securities issued by companies in the industrials sector may be adversely affected by supply and demand changes related to their specific products or services and industrials sector products in general. Companies in the industrials sector may also be adversely affected by product obsolescence, claims for environmental damage or product liability and changes in general economic conditions. Additional risks of industrials companies include exchange rates, commodity prices, intense competition, consolidation, domestic and international politics, government regulation, import controls, and excess capacity, among other factors. Information Technology Companies Risk. The Fund has significant exposure to companies 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. Non-U.S. Investment Risk. Investments in securities of non-U.S. companies (particularly in emerging markets) present risks beyond those of securities of U.S. issuers and can be more volatile than investments in U.S. companies. Risks of investing in securities of foreign companies include: different accounting standards; expropriation, nationalization or other adverse political or economic developments; currency devaluation, blockages or transfer restrictions; changes in foreign currency exchange rates; taxes; restrictions on non-U.S. investments and exchange of securities; and less government supervision and regulation of issuers in non-U.S. countries. Further, other diplomatic, political or economic developments can affect investments in foreign companies. Prices of non-U.S. securities may also be more volatile. Finally, the value of securities denominated in foreign currencies, and of dividends from such securities, can change significantly when foreign currencies strengthen or weaken relative to the U.S. dollar. Passive Investment Risk. The Fund invests in the securities included in the Index regardless of their investment merit. The Fund does not attempt to outperform the Index or take defensive positions in declining markets, except in connection with the Index’s risk reduction mechanism. As a result, the Fund’s performance may be adversely affected by a general decline in the market segments relating to the Index. 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. Small- and Mid-Capitalization Company Risk. Generally, small- or mid-capitalization companies, which are often less seasoned, have more potential for rapid growth. However, they often involve greater risk than large cap companies and these risks are passed on to funds that invest in them. These companies may not have the management experience, financial resources, product diversification and competitive strengths of larger companies. Tracking Error Risk. The Fund’s return may not match the return of the Index for a number of reasons. For example, the Fund incurs operating expenses not applicable to the Index, and incurs costs in buying and selling securities, especially when rebalancing the Fund’s securities holdings to reflect changes in the composition of the Index. In addition, the performance of the Fund and the Index may vary due to asset valuation differences and differences between the Fund’s portfolio and the Index resulting from legal restrictions, cost or liquidity constraints. 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. |
| Innovator IBD Breakout Opportunities ETF | Cyber Security Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Cyber Security Risk. The Fund is susceptible to 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 sub-adviser, as applicable, or issuers in which the Fund invests, can also subject the Fund to many of the same risks associated with direct cyber security breaches. While the Fund has established business continuity plans and risk management systems designed to reduce the risks associated with cyber security, there are inherent limitations in such plans and systems. Additionally, 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 IBD Breakout Opportunities ETF | Liquidity Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Liquidity Risk. Investments in securities that are difficult to purchase or sell (illiquid or thinly-traded securities) may reduce returns if the Fund is unable to sell the securities at an advantageous time or price or achieve its desired level of exposure to a certain sector. Liquidity risk arises, for example, from small average trading volumes, trading restrictions or temporary suspensions of trading. To meet redemption requests, the Fund may be forced to sell securities at an unfavorable time and/or under unfavorable conditions. Generally, the less liquid the market for a security at the time the Fund seeks to sell it, the greater the risk of loss or decline of value to the Fund. Overall market liquidity may negatively impact Fund performance and NAV, especially if the Fund is forced to sell illiquid securities in a down market. |
| Innovator IBD Breakout Opportunities 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. 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 IBD Breakout Opportunities ETF | Portfolio Turnover Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Portfolio Turnover Risk. The Fund may be subject to high portfolio turnover due to the Index’s weekly rebalance and reconstitution. High portfolio turnover (higher than 100%) may result in increased transaction costs to the Fund, including brokerage commissions, dealer markups and other transaction costs on the sale of the securities and on reinvestment in other securities, as well as possible increased taxable distributions. |
| Innovator IBD Breakout Opportunities ETF | 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. 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 value 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 in greater than normal intra-day bid-ask spreads for Shares. Operational Risk. The Fund is subject to risks arising from various operational factors, including, but not limited to, human error, 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. Although the Fund and its investment adviser seek to reduce these operational risks through controls and procedures, there is no way to completely protect against such 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. Shares trade on the Exchange at market prices that may be below, at or above the Fund’s NAV. 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 APs 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 Index Autocallable Income Strategy ETF | Risk Lose Money [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | You could lose money by investing in the Fund. |
| Innovator Index Autocallable Income 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 Index Autocallable Income Strategy 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 Index Autocallable Income Strategy ETF | Investment Strategy Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Investment Strategy Risk. The Fund’s investment strategy subjects it to certain unique risks, which are detailed below. Autocallable Returns Risk. The Fund seeks to replicate the payout structure of autocallable notes through its investments in Autocallable Instruments. Autocallable notes differ in various ways from traditional debt securities. Autocallable notes do not guarantee a return of principal and limit the positive investment return that can be achieved through the operation of the Maturity Barrier Level, which if triggered by the worst-performing Market Index, subjects the Fund to the losses of such index. Further, the Fund does not participate in any upside gain of any Market Indices and if the autocall feature of an instrument is triggered the Fund would forego any remaining Coupon Payments and may be unable to invest in another Autocallable Instrument with a similar level of risk and comparable return profile. The Coupon Payments of Autocallable Instruments are not linked to the performance of the Market Indices at any time other than on the Maturity Date and Coupon Observation Dates. Moreover, because the Autocallable Instruments do not participate in any upside performance of the Market Indices, the Fund’s positive returns are limited to the Coupon Payments. If the autocall feature is triggered, the Fund will forego future Coupon Payments and any positive returns may be limited. Further, the Fund may be unable to invest the proceeds in a subsequent Autocallable Instrument or one with similar terms, and therefore the Fund may not achieve its investment objective. Barrier Risk. The Autocallable Instruments utilize a Coupon Barrier Level and a Maturity Barrier Level, which each set forth the threshold amount of loss of the worst performing Market Index may experience before the Fund will forfeit, Coupon Payments or a portion or all of the initial notional amount invested in such instrument, respectively. If the Coupon Barrier Level is breached on an Coupon Observation Date, the Fund will forfeit the Coupon Payment for sch period. It is possible that the Fund may not receive any Coupon Payments under an Autocallable Instrument over the duration of such instrument. If the Maturity Barrier Level is breached, the Fund will forfeit the percentage of the initial notional amount it invested that is equal to the entire amount of loss of the worst-performing Market Index over the term of the Autocallable Instrument. Accordingly, the Fund could forfeit the entire notional exposure for any one Autocallable Instrument. Further, a shareholder may lose its entire investment in the Fund notwithstanding the sought-after limited downside protection intended to be provided by the Autocallable Instrument and the risk mitigation intended to be provided by the laddered portfolio. Call Risk. The Autocallable Instruments may be redeemed, or “called,” before their stated maturity date if the Autocallable Level is breached on a given Call Observation Date. In this event, the Fund will forego all future Coupon Payments associated with the Autocallable Instrument. If an instrument is called prior to its Maturity Date, the Fund’s income may decrease if the Fund must reinvest the proceeds into an Autocallable Instrument with a lower Coupon Rate. Further, in the event an Autocallable Instrument is called, there is no guarantee that the Fund will be able to invest in a new Autocallable Instrument or that such new instrument will have similar terms. Concentration Risk. Through its exposure to the Market Indices via the Autocallable Instruments, the Fund has exposure to the securities of a particular industry or group of industries represented by the Market Indices. 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. 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 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. Market Indices Risk. The Fund is exposed to the risks of the Market Indices through the Autocallable Instruments. Such risks include those detailed below. 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 that comprise the Market Indices. 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. Significant Exposure Risk. To the extent that the Fund invests or has exposure to a significant percentage of its assets 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. The Market Indices provide significant exposure to the following sectors: financials, industrials, and information technology. Smaller 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. Market Underperformance Risk. The Fund’s investment strategy may cause the Fund to underperform the Market Indices. The underperformance may be a result of management risk or the implementation of the Fund’s investment strategy. Money Market Funds Risk. Money market funds are subject to management fees and other expenses, and the Fund’s investments in money market funds will cause it to bear proportionately the costs incurred by the money market funds’ operations while simultaneously paying its own management fees and expenses. An investment in a money market fund is not a bank account and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency; it is possible to lose money by investing in a money market fund. To the extent that the Fund invests in money market funds, the Fund will be subject to the same risks that investors experience when investing in money market funds. These risks may include the impact of significant fluctuations in assets as a result of the cash sweep program or purchase and redemption activity in those funds. U.S. Government Securities Risk. The Fund invests in U.S. T-Bills, which are government debt instruments issued by the U.S. Department of Treasury and are backed by the full faith and credit of the United States government. 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. T-Bills 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. T-Bills 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 U.S. Treasuries to decline. U.S. Treasuries 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. |
| Innovator Index Autocallable Income Strategy ETF | Derivatives Risk [Member] | |
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| Risk [Text Block] | Derivatives Risk. To employ the Fund’s investment strategy, the Fund utilizes derivative instruments, specifically, OTC swap agreements. 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: 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. Credit Risk. Credit risk is the risk that issuer or other obligated party (associated with the Fund’s investments in Autocallable Instruments) may be unable or unwilling to make Coupon Payments when due. In addition, the value of such investments may decline because of concerns about the issuer’s ability or unwillingness to make such payments. While the Fund will review the credit rating of the counterparties of the Autocallable Instruments to assess such party’s overall creditworthiness, any such rating will not provide an assessment of a specific financial obligation of the issuer, such as an Autocallable Instrument. That notwithstanding, the counterparties of the Autocallable Instruments will have an investment grade rating at the time of investment. While any such counterparty credit rating will assess such party’s overall creditworthiness, it will not provide an assessment of a specific financial obligation of the issuer, such as an Autocallable Instrument. FLEX Options Risk. The Fund may utilize FLEX Options as part of its investment strategies, which are customizable, exchange-traded option contracts that 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 price return 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 Fund utilizes European style FLEX Option contracts, which are exercisable at the strike price only on their expiration date. As a FLEX Option approaches its expiration date, its value typically increasingly moves with the value of the reference asset of such option. However, prior to such date, the value of the FLEX Options does 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). 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 value of the reference asset, changes in interest rates, changes in the actual and implied volatility of the reference asset and the remaining time to until the FLEX Options expire. Box Spread Risk. If one or more of the individual option positions that comprise a Box Spread are modified or closed separately prior to the option contract’s expiration, then the Box Spread may no longer effectively eliminate risk tied to underlying reference asset’s price movement. Furthermore, the Box Spread’s value is derived in the market and is in part based on the time until the options comprising the Box Spread expire and the prevailing market interest rates. The Fund’s ability to utilize Box Spreads effectively is dependent on the availability and willingness of other market participants to sell Box Spreads to the Fund at competitive prices. If the Box Spread does not perform as intended, the Fund could have exposure to the underlying reference asset of the options comprising the Box Spread. In such a scenario, the Fund would be subject to the risks of equity securities markets. Equity securities prices fluctuate for several reasons, including changes in investors’ perceptions of the financial condition of an issuer or the general condition of the relevant equity market, such as market volatility, or when political or economic events affecting an issuer occur. OTC Derivatives Risk. The Fund may utilize derivatives that are traded over-the-counter. In general, OTC derivatives are subject to the same risks as derivatives generally, as described herein. However, because OTC derivatives do not trade on an exchange, the parties to an OTC derivative face heightened levels of counterparty risk, liquidity risk and valuation risk. The Autocallable Instruments will be OTC derivatives, and therefore its counterparty risk will be higher if it only trades with a single or small number of counterparties. The secondary market for OTC derivatives may not be as deep as for other instruments and such instruments may experience periods of illiquidity. In addition, some OTC derivatives may be complex and difficult to value. If the Fund fails to meet its payment or collateral delivery obligations under an Autocallable Instrument or some other termination or default event occurs, the counterparty to the contract could close out the contract and the Fund could experience significant losses and fail to achieve its investment objective. Swap Agreements Risk. The Fund expects to principally use swap agreements as the Autocallable Instruments. Swap agreements are generally traded in OTC markets and have only recently become subject to regulation by the Commodity Futures Trading Commission (“CFTC”). CFTC rules, however, do not cover all types of swap agreements. Investors, therefore, may not receive the protection of CFTC regulation or the statutory scheme of the Commodity Exchange Act of 1936, as amended (the “Commodity Exchange Act”) in connection with the Fund’s usage of swap agreements. The lack of regulation in these markets could expose investors to significant losses under certain circumstances, including in the event of trading abuses or financial failure by participants. Unlike in futures contracts, the counterparty to uncleared OTC swap agreements is generally a single bank or other financial institution, rather than a clearing organization backed by a group of financial institutions. As a result, the Fund is subject to increased counterparty risk with respect to the amount it expects to receive from counterparties to uncleared swap agreements. If a counterparty becomes bankrupt or otherwise fails to perform its obligations due to financial difficulties, the Fund could suffer significant losses on these contracts and the value of an investor’s investment in the Fund may decline. OTC swap agreements of the type that may be utilized by the Fund are less liquid than futures contracts because they are not traded on an exchange, do not have uniform terms and conditions, and are generally entered into based upon the creditworthiness of the parties and the availability of credit support, such as collateral, and in general, are not transferable without the consent of the counterparty. Swap agreements are also subject to the risk of imperfect correlation between the value of the reference asset underlying the agreement and the swap agreement itself. Leverage inherent in derivatives will tend to magnify the Fund’s gains and losses. Moreover, if a particular swap agreement is terminated or autocalled, the Fund may be unable to enter into another swap agreement or invest in other derivatives to achieve the desired exposure consistent with the Fund’s investment objective. This, in turn, may prevent the Fund from achieving its investment objective. |
| Innovator Index Autocallable Income Strategy ETF | Distribution Tax Risk [Member] | |
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| Risk [Text Block] | Distribution Tax Risk. The Fund currently expects to make distributions on a regular basis. While the Fund will normally pay its income as distributions, the Fund’s distributions may exceed the Fund’s income and gains for the Fund’s taxable year. The Fund may be required to reduce its distributions if it has insufficient income. Additionally, there may be times the Fund needs to sell securities when it would not otherwise do so and could cause the distributions from that sale to constitute return of capital. Distributions in excess of the Fund’s current and accumulated earnings and profits will be treated as a return of capital. Return of capital distributions do not represent income or gains generated by the Fund’s investment activities and should not be interpreted by shareholders as such. Distributions in excess of the Fund’s minimum distribution requirements, but not in excess of the Fund’s earnings and profits, will be taxable to Fund shareholders and will not constitute nontaxable returns of capital. A return of capital distribution generally will not be taxable but will reduce the shareholder’s cost basis and will result in a higher capital gain or lower capital loss when those Fund shares on which the distribution was received are sold. Once a Fund shareholder’s cost basis is reduced to zero, further distributions will be treated as capital gain, if the Fund shareholder holds shares of the Fund as capital assets. Additionally, any capital returned through distributions will be distributed after payment of Fund fees and expenses. Because the Fund’s distributions may consist of return of capital, the Fund may not be an appropriate investment for investors who do not want their principal investment in the Fund to decrease over time or who do not wish to receive return of capital in a given period. 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. Substantial uncertainties exist related to the calculation of income from the Synthetic Autocallable Contracts. The Fund intends to calculate the income from the contacts using the IRS rules for notional principal contracts. However, the application of such rules to the Synthetic Autocallable Contracts may be subject to challenge or varying interpretation. If the Fund is incorrect in its calculation of income, the Fund may be required to make an extraordinary distribution to distribute prior undistributed income or recharacterize prior distributions. |
| Innovator Index Autocallable Income Strategy ETF | 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 Index Autocallable Income Strategy ETF | 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 the Fund’s 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 Index Autocallable Income Strategy 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 Upside 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 Index Autocallable Income Strategy ETF | Tax Risk [Member] | |
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| Risk [Text Block] | Tax Risk. The Fund intends to qualify as a “regulated investment company” (“RIC”) under Subchapter M of the Code. The federal income tax treatment of the securities in which the Fund may invest, including the Fund’s usage of Autocallable Instruments, may not be clear. Any such failure to comply with the rules applicable to RICs could cause the Fund to fail to qualify as such. To qualify and maintain its status as a RIC, the Fund must meet certain income, diversification and distributions tests. 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. If the Fund were to fail to meet the qualifying income test or asset diversification test and fail to qualify as a RIC, it would be taxed in the same manner 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. Additionally, the federal income tax treatment of certain aspects of the proposed operations of the Fund are not entirely clear and may have adverse tax consequences, including but not limited to the Fund losing its status as a RIC. To maintain its status as a RIC, the Fund must distribute 90% of its investment company taxable income annually. In addition, to avoid a non-deductible excise tax, the Fund must distribute 98% of its ordinary income and 98.2% of its capital gain net income. Separately, depending upon the circumstances, sales 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. |
| Innovator Index Autocallable Income Strategy ETF | Valuation Risk [Member] | |
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| 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 investments will become more difficult. In market environments where there is reduced availability of reliable objective pricing data, the judgment of the 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 Laddered Allocation Buffer ETF | Risk Lose Money [Member] | |
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| Risk [Text Block] | You could lose money by investing in the Fund. |
| Innovator Laddered Allocation Buffer 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 Laddered Allocation Buffer ETF | Investment Strategy Risk [Member] | |
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| Risk [Text Block] | Investment Strategy Risk. The Fund’s investment strategy subjects it to certain unique risks, which are detailed below. Concentration Risk. The Fund will concentrate in the securities of a particular industry or group of industries to the same extent as the 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 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. Fund-of-Funds Risk. Shareholders of the Fund will experience investment returns that are different than the investment returns provided by an Underlying ETF. The Fund does not itself pursue a defined outcome strategy, nor does the Fund itself provide a defined buffer against U.S. Large Cap ETF losses. Because the Fund will typically not purchase an Underlying ETF on the first day of an Outcome Period, it is not likely that the stated outcome of the Underlying ETF will be realized by the Fund. The Fund will be continuously exposed to the investment profiles of each of the Underlying ETFs during their respective Outcome Periods. A purchaser of Shares will, therefore, have exposure to Underlying ETFs with differing profiles in terms of its upside performance availability to its Cap and potential for downside protection to its buffer. The Fund may invest in an Underlying ETF at times when the Underlying ETF is experiencing little or no benefit to its Cap or buffer. The Fund, with its aggregate exposure to each of the Underlying ETFs and it respective defined outcome profiles, may have investment returns that are inferior to that of any single Underlying ETF or group of Underlying ETFs over any given time period. In between the semi-annual rebalance period of the Index, because the Fund is not equally weighted on a continuous basis, the Fund may be exposed to one or more Underlying ETFs disproportionately when compared to other Underlying ETFs. In such circumstances, the Fund will be subject to the over-weighted performance of such Underlying ETF. As a shareholder in other ETFs, the Fund bears its proportionate share of each ETF’s expenses, subjecting Fund shareholders to duplicative expenses. Index Provider Risk. The Fund seeks to achieve returns that generally correspond, before fees and expenses, to the performance of the Index, as published by the Index Provider. There is no assurance that the Index Provider will compile its Index accurately, or that the Index will be determined, composed or calculated accurately. While the Index Provider gives descriptions of what the Index is designed to achieve, the Index Provider does not provide any warranty or accept any liability in relation to the quality, accuracy or completeness of data in the Index, and it does not guarantee that its Index will be in line with its methodology. Non-Correlation Risk. The Fund’s return may not match the return of the Index for a number of reasons. For example, the Fund incurs operating expenses not applicable to the Index, and incurs costs in buying and selling securities, especially when rebalancing the Fund’s securities holdings to reflect changes in the composition of the Index. Although the Fund currently intends to seek to fully replicate the Index, the Fund may use a representative sampling approach, which may cause the Fund not to be as well-correlated with the return of the Index as would be the case if the Fund purchased all of the securities in the Index in the proportions represented in the Index. In addition, the performance of the Fund and the Index may vary due to asset valuation differences and differences between the Fund’s portfolio and the Index resulting from legal restrictions, cost or liquidity constraints. Passive Investment Risk. The Fund is not actively managed. Unlike many investment companies, the Fund does not utilize an investing strategy that seeks returns in excess of the Index. Therefore, it would not necessarily buy or sell a security unless that security is added or removed, respectively, from the Index, even if that security generally is underperforming. Rather, the Fund invests in the securities included in the Index regardless of their investment merit. The Fund does not attempt to outperform the Index or take defensive positions in declining markets. As a result, the Fund’s performance may be adversely affected by a general decline in the market segments relating to the Index. Underlying ETF Risk. While the Underlying ETFs seek to provide certain investment outcomes, there is no guarantee that they will successfully do so. Because the Fund’s value is based on the value of the Underlying ETFs, the Fund’s investment performance largely depends on the investment performance and associated risks of the Underlying ETFs. The Underlying ETFs are 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 Underlying ETFs. As such, the Fund may be subject to the following risks as a result of its investments in the Underlying ETFs: Buffered Loss Risk. There can be no guarantee that an Underlying ETF will be successful in its strategy to provide buffer protection against U.S. Large Cap ETF losses if the U.S. Large Cap ETF decreases over the Outcome Period by 9% or less. A shareholder may lose their entire investment. Each Underlying ETF’s strategy seeks to deliver returns that match the U.S. Large Cap ETF (up to the Cap), while limiting downside losses, if shares are bought on the day on which the Underlying ETF enters into the FLEX Options and held until those FLEX Options expire at the end of each Outcome Period. Since the Fund purchases shares of an Underlying ETF after the date on which the FLEX Options were entered into or sells shares of the Underlying ETF prior to the expiration of the FLEX Options, the buffer that the Underlying ETF seeks to provide may not be available. The Underlying ETFs do not provide principal protection or non-principal protection and the Fund, and therefore Fund shareholders, may experience significant losses on their investment, including the loss of their entire investment. Cap Change Risk. A new Cap is established for each Underlying ETF 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. Each Underlying ETF’s strategy seeks to participate in the upside returns of the U.S. Large Cap ETF (or components thereof), subject to the Cap. In the event that the U.S. Large Cap ETF has gains in excess of the Cap for the Outcome Period, an Underlying ETF will not participate in those gains beyond the Cap. An Underlying ETF’s strategy seeks to deliver returns that match those of the U.S. Large Cap ETF if shares of the Underlying ETF are bought on the day on which the Underlying ETF enters into the FLEX Options and held until those FLEX Options expire at the end of the Outcome Period. Since the Fund purchases shares of an Underlying ETF after the date on which the FLEX Options were entered into and the Underlying ETF has risen in value to a level near to the Cap, there may be little or no ability for the Fund, and therefore Fund shareholders, to experience an investment gain on their shares. 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, each Underlying ETF’s counterparty is a clearing house, such as the OCC, rather than a bank or broker. Since each Underlying ETF is not a member of clearing houses and only members of a clearing house (“clearing members”) can participate directly in the clearing house, the Underlying ETF will hold cleared derivatives through accounts at clearing members. In cleared derivatives positions, the Underlying ETF 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 each Underlying ETF with any clearing member as margin for its FLEX Options may, in certain circumstances, be used to satisfy losses of other clients of the Underlying ETF’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 each Underlying ETF might not be fully protected in the event of the clearing member’s bankruptcy. Each Underlying ETF is also subject to the risk that a limited number of clearing members are willing to transact on the Underlying ETF’s behalf, which heightens the risks associated with a clearing member’s default. If a clearing member defaults the Underlying ETF could lose some or all of the benefits of a transaction entered into by the Underlying ETF with the clearing member. The loss of a clearing member for an Underlying ETF to transact with could result in increased transaction costs and other operational issues that could impede the Underlying ETF’s ability to implement its investment strategy. If an Underlying ETF cannot find a clearing member to transact with on the Underlying ETF’s behalf, the Underlying ETF may be unable to effectively implement its investment strategy. Correlation Risk. The FLEX Options held by the Underlying ETFs will be exercisable at the strike price only on their expiration date. As a FLEX Option approaches its expiration date, its value will typically increasingly move with the value of the U.S. Large Cap ETF. However, prior to the expiration date, the value of FLEX Options may vary because of related factors other than the value of the U.S. Large Cap 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 FLEX Options include interest rate changes and implied volatility levels of the U.S. Large Cap ETF, among others. The value of FLEX Options held by the Underlying ETFs 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 an Underlying ETF 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 Underlying ETFs may be unable to recover an investment from a 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 an Underlying ETF 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 an Underlying ETF were to become insolvent, the Underlying ETF 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 Underlying ETF’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, an Underlying ETF could suffer significant losses. FLEX Options Risk. The Underlying ETFs 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 Underlying ETFs bear 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 Underlying ETFs 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 Underlying ETFs 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 Underlying ETFs at prices that reflect the market price of the Shares, a Underlying ETF’s NAV and, in turn the share price of such Underlying ETF, could be negatively impacted. The Underlying ETFs may experience substantial downside from specific FLEX Option positions and certain FLEX Option positions may expire worthless. The FLEX Options held by the Underlying ETFs 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 U.S. Large Cap ETF. However, prior to such date, the value of the FLEX Options does not increase or decrease at the same rate as the U.S. Large Cap 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 Underlying ETFs 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 U.S. Large Cap ETF share price, changes in interest rates, changes in the actual and implied volatility of the U.S. Large Cap ETF and the remaining time to until the FLEX Options expire. Information Technology Companies Risk. The Underlying ETFs have significant exposure to information technology companies. 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. Investment Objective Risk. Certain circumstances under which an Underlying ETF might not achieve its objective include, but are not limited, to (i) if the Underlying ETF disposes of FLEX Options, (ii) if the Underlying ETF is unable to maintain the proportional relationship based on the number of FLEX Options in the fund’s portfolio, (iii) a significant accrual of expenses in connection with effecting the Underlying ETF’s principal investment strategy or (iv) adverse tax law changes or interpretations affecting the treatment of FLEX Options. Liquidity Risk. In the event that trading in the underlying FLEX Options is limited or absent, the value of an Underlying ETF’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 Underlying ETFs require a sufficient number of participants to facilitate the purchase and sale of options on an exchange to provide liquidity to an Underlying ETF 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. Outcome Period Risk. Each Underlying ETF’s investment strategy is designed to deliver returns that match the U.S. Large Cap ETF if Shares are bought on the day on which the Underlying ETF enters into the FLEX Options and held until those FLEX Options expire at the end of the Outcome Period. In the event the Fund purchases Shares after the date on which the FLEX Options were entered into or sells shares prior to the expiration of the FLEX Options, the returns realized by the Fund, and therefore Fund shareholders, will not match those that the Underlying ETF seeks to provide. An investor that holds shares of an Underlying ETF over multiple Outcome Periods may fail to experience gains comparable to those of the U.S. Large Cap ETF over time because at the end of each Outcome Period, a new Cap will be established and any gains of the U.S. Large Cap ETF above the prior Cap will be forfeited Underlying ETF Tax Risk. The Underlying ETFs have each elected to be treated and intend to qualify each year as a regulated investment company (“RIC”) under Subchapter M of the Code. In order to be treated as a RIC, each Underlying ETF must meet certain income, diversification and distribution tests. If, in any year, an Underlying ETF fails to qualify as a RIC under the applicable tax laws, the Underlying ETF would be taxed as an ordinary corporation. The federal income tax treatment of certain aspects of the proposed operations of the Underlying ETFs is not entirely clear, which could impact the Underlying ETFs’ ability to qualify as a RIC. This includes the tax aspects of the Underlying ETFs’ options strategy, its hedging strategy, the possible application of the “straddle” rules, and various loss limitation provisions of the Code. The Underlying ETFs’ investments in offsetting positions with respect to the Underlying ETF may affect the character of gains or losses realized by the Underlying ETFs under the Code’s “straddle” rules and may increase any short-term capital gains realized by the Underlying ETFs. Each Underlying ETF 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, each Underlying ETF could lose its own status as a RIC. To maintain its status as a RIC, each Underlying ETF 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, each Underlying ETF 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 an Underlying ETF to recognize income that such Underlying ETF is required to distribute to maintain such Underlying ETF’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 an Underlying ETF. Alternatively, if an Underlying ETF only makes distributions to maintain its RIC status and becomes subject to the excise tax, that could also affect the projected performance of such Underlying ETF. In either case, the assets sold to fund redemptions, distributions or pay the excise tax will not be available to assist the Underlying ETF 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 Underlying ETF will enter into. Based upon language in the legislative history, the Underlying ETFs intend to treat the issuer of the FLEX Options as the referenced asset, which, assuming the referenced asset qualifies as a RIC, would allow the Underlying ETF 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 Underlying ETFs do not believe that the positions held by the Underlying ETFs 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 debt instrument for federal tax purposes. The result of such a position would be that the Underlying ETFs 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. In the event that a shareholder purchases Shares of an Underlying ETF before a distribution by the Underlying ETF, the entire distribution may be taxable to the shareholder even though a portion of the distribution effectively represents a return of the purchase price. Upside Participation Risk. There can be no guarantee that an Underlying ETF will be successful in its strategy to provide the Fund and Fund shareholders with a total return that matches the increase of the U.S. Large Cap ETF over the Outcome Period, up to the maximum return imposed by the Cap. In the event the Fund purchases shares after the date on which the FLEX Options were entered into or does not stay invested in Underlying ETF for the entirety of the Outcome Period, the returns realized by the Fund, and therefore Fund shareholders, may not match those that the Underlying ETF seeks to achieve. 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 an Underlying ETF’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 an Underlying ETF to accurately assign a daily value. |
| Innovator Laddered Allocation Buffer ETF | 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 Laddered Allocation Buffer ETF | 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 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 Shares, are subject to market fluctuations and liquidity constraints that may be caused by factors such 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 Laddered Allocation Buffer 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. 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 value 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, 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 (as defined below) 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 APs 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 Laddered Allocation Power Buffer ETF | Risk Lose Money [Member] | |
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| Risk [Text Block] | You could lose money by investing in the Fund. |
| Innovator Laddered Allocation Power Buffer 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 Laddered Allocation Power Buffer ETF | Investment Strategy Risk [Member] | |
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| Risk [Text Block] | Investment Strategy Risk. The Fund’s investment strategy subjects it to certain unique risks, which are detailed below. Concentration Risk. The Fund will concentrate in the securities of a particular industry or group of industries to the same extent as the 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 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. Fund-of-Funds Risk. Shareholders of the Fund will experience investment returns that are different than the investment returns provided by an Underlying ETF. The Fund does not itself pursue a defined outcome strategy, nor does the Fund itself provide a defined buffer against U.S. Large Cap ETF losses. Because the Fund will typically not purchase an Underlying ETF on the first day of an Outcome Period, it is not likely that the stated outcome of the Underlying ETF will be realized by the Fund. The Fund will be continuously exposed to the investment profiles of each of the Underlying ETFs during their respective Outcome Periods. A purchaser of Shares will, therefore, have exposure to Underlying ETFs with differing profiles in terms of its upside performance availability to its Cap and potential for downside protection to its buffer. The Fund may invest in an Underlying ETF at times when the Underlying ETF is experiencing little or no benefit to its Cap or buffer. The Fund, with its aggregate exposure to each of the Underlying ETFs and it respective defined outcome profiles, may have investment returns that are inferior to that of any single Underlying ETF or group of Underlying ETFs over any given time period. In between the semi-annual rebalance period of the Index, because the Fund is not equally weighted on a continuous basis, the Fund may be exposed to one or more Underlying ETFs disproportionately when compared to other Underlying ETFs. In such circumstances, the Fund will be subject to the over-weighted performance of such Underlying ETF. As a shareholder in other ETFs, the Fund bears its proportionate share of each ETF’s expenses, subjecting Fund shareholders to duplicative expenses. Index Provider Risk. The Fund seeks to achieve returns that generally correspond, before fees and expenses, to the performance of the Index, as published by the Index Provider. There is no assurance that the Index Provider will compile its Index accurately, or that the Index will be determined, composed or calculated accurately. While the Index Provider gives descriptions of what the Index is designed to achieve, the Index Provider does not provide any warranty or accept any liability in relation to the quality, accuracy or completeness of data in the Index, and it does not guarantee that its Index will be in line with its methodology. Non-Correlation Risk. The Fund’s return may not match the return of the Index for a number of reasons. For example, the Fund incurs operating expenses not applicable to the Index, and incurs costs in buying and selling securities, especially when rebalancing the Fund’s securities holdings to reflect changes in the composition of the Index. Although the Fund currently intends to seek to fully replicate the Index, the Fund may use a representative sampling approach, which may cause the Fund not to be as well-correlated with the return of the Index as would be the case if the Fund purchased all of the securities in the Index in the proportions represented in the Index. In addition, the performance of the Fund and the Index may vary due to asset valuation differences and differences between the Fund’s portfolio and the Index resulting from legal restrictions, cost or liquidity constraints. Passive Investment Risk. The Fund is not actively managed. Unlike many investment companies, the Fund does not utilize an investing strategy that seeks returns in excess of the Index. Therefore, it would not necessarily buy or sell a security unless that security is added or removed, respectively, from the Index, even if that security generally is underperforming. Rather, the Fund invests in the securities included in the Index regardless of their investment merit. The Fund does not attempt to outperform the Index or take defensive positions in declining markets. As a result, the Fund’s performance may be adversely affected by a general decline in the market segments relating to the Index. Underlying ETF Risk. While the Underlying ETFs seek to provide certain investment outcomes, there is no guarantee that they will successfully do so. Because the Fund’s value is based on the value of the Underlying ETFs, the Fund’s investment performance largely depends on the investment performance and associated risks of the Underlying ETFs. The Underlying ETFs are 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 Underlying ETFs. As such, the Fund may be subject to the following risks as a result of its investments in the Underlying ETFs: Buffered Loss Risk. There can be no guarantee that an Underlying ETF will be successful in its strategy to provide buffer protection against U.S. Large Cap ETF losses if the U.S. Large Cap ETF decreases over the Outcome Period by 15% or less. A shareholder may lose their entire investment. Each Underlying ETF’s strategy seeks to deliver returns that match the U.S. Large Cap ETF (up to the Cap), while limiting downside losses, if shares are bought on the day on which the Underlying ETF enters into the FLEX Options and held until those FLEX Options expire at the end of each Outcome Period. Since the Fund purchases shares of an Underlying ETF after the date on which the FLEX Options were entered into or sells shares of the Underlying ETF prior to the expiration of the FLEX Options, the buffer that the Underlying ETF seeks to provide may not be available. The Underlying ETFs do not provide principal protection or non-principal protection and the Fund, and therefore Fund shareholders, may experience significant losses on their investment, including the loss of their entire investment. Cap Change Risk. A new Cap is established for each Underlying ETF 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. Each Underlying ETF’s strategy seeks to participate in the upside returns of the U.S. Large Cap ETF (or components thereof), subject to the Cap. In the event that the U.S. Large Cap ETF has gains in excess of the Cap for the Outcome Period, an Underlying ETF will not participate in those gains beyond the Cap. An Underlying ETF’s strategy seeks to deliver returns that match those of the U.S. Large Cap ETF if shares of the Underlying ETF are bought on the day on which the Underlying ETF enters into the FLEX Options and held until those FLEX Options expire at the end of the Outcome Period. Since the Fund purchases shares of an Underlying ETF after the date on which the FLEX Options were entered into and the Underlying ETF has risen in value to a level near to the Cap, there may be little or no ability for the Fund, and therefore Fund shareholders, to experience an investment gain on their shares. 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, each Underlying ETF’s counterparty is a clearing house, such as the OCC, rather than a bank or broker. Since each Underlying ETF is not a member of clearing houses and only members of a clearing house (“clearing members”) can participate directly in the clearing house, the Underlying ETF will hold cleared derivatives through accounts at clearing members. In cleared derivatives positions, the Underlying ETF 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 each Underlying ETF with any clearing member as margin for its FLEX Options may, in certain circumstances, be used to satisfy losses of other clients of the Underlying ETF’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 each Underlying ETF might not be fully protected in the event of the clearing member’s bankruptcy. Each Underlying ETF is also subject to the risk that a limited number of clearing members are willing to transact on the Underlying ETF’s behalf, which heightens the risks associated with a clearing member’s default. If a clearing member defaults the Underlying ETF could lose some or all of the benefits of a transaction entered into by the Underlying ETF with the clearing member. The loss of a clearing member for an Underlying ETF to transact with could result in increased transaction costs and other operational issues that could impede the Underlying ETF’s ability to implement its investment strategy. If an Underlying ETF cannot find a clearing member to transact with on the Underlying ETF’s behalf, the Underlying ETF may be unable to effectively implement its investment strategy. Correlation Risk. The FLEX Options held by the Underlying ETFs will be exercisable at the strike price only on their expiration date. As a FLEX Option approaches its expiration date, its value will typically increasingly move with the value of the U.S. Large Cap ETF. However, prior to the expiration date, the value of FLEX Options may vary because of related factors other than the value of the U.S. Large Cap 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 FLEX Options include interest rate changes and implied volatility levels of the U.S. Large Cap ETF, among others. The value of FLEX Options held by the Underlying ETFs 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 an Underlying ETF 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 Underlying ETFs may be unable to recover an investment from a 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 an Underlying ETF 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 an Underlying ETF were to become insolvent, the Underlying ETF 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 Underlying ETF’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, an Underlying ETF could suffer significant losses. FLEX Options Risk. The Underlying ETFs 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 Underlying ETFs bear 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 Underlying ETFs 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 Underlying ETFs 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 Underlying ETFs at prices that reflect the market price of the Shares, a Underlying ETF’s NAV and, in turn the share price of such Underlying ETF, could be negatively impacted. The Underlying ETFs may experience substantial downside from specific FLEX Option positions and certain FLEX Option positions may expire worthless. The FLEX Options held by the Underlying ETFs 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 U.S. Large Cap ETF. However, prior to such date, the value of the FLEX Options does not increase or decrease at the same rate as the U.S. Large Cap 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 Underlying ETFs 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 U.S. Large Cap ETF share price, changes in interest rates, changes in the actual and implied volatility of the U.S. Large Cap ETF and the remaining time to until the FLEX Options expire. Information Technology Companies Risk. The Underlying ETFs have significant exposure to information technology companies. 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. Investment Objective Risk. Certain circumstances under which an Underlying ETF might not achieve its objective include, but are not limited, to (i) if the Underlying ETF disposes of FLEX Options, (ii) if the Underlying ETF is unable to maintain the proportional relationship based on the number of FLEX Options in the fund’s portfolio, (iii) a significant accrual of expenses in connection with effecting the Underlying ETF’s principal investment strategy or (iv) adverse tax law changes or interpretations affecting the treatment of FLEX Options. Liquidity Risk. In the event that trading in the underlying FLEX Options is limited or absent, the value of an Underlying ETF’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 Underlying ETFs require a sufficient number of participants to facilitate the purchase and sale of options on an exchange to provide liquidity to an Underlying ETF 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. Outcome Period Risk. Each Underlying ETF’s investment strategy is designed to deliver returns that match the U.S. Large Cap ETF if Shares are bought on the day on which the Underlying ETF enters into the FLEX Options and held until those FLEX Options expire at the end of the Outcome Period. In the event the Fund purchases Shares after the date on which the FLEX Options were entered into or sells shares prior to the expiration of the FLEX Options, the returns realized by the Fund, and therefore Fund shareholders, will not match those that the Underlying ETF seeks to provide. An investor that holds shares of an Underlying ETF over multiple Outcome Periods may fail to experience gains comparable to those of the U.S. Large Cap ETF over time because at the end of each Outcome Period, a new Cap will be established and any gains of the U.S. Large Cap ETF above the prior Cap will be forfeited Underlying ETF Tax Risk. The Underlying ETFs have each elected to be treated and intend to qualify each year as a regulated investment company (“RIC”) under Subchapter M of the Code. In order to be treated as a RIC, each Underlying ETF must meet certain income, diversification and distribution tests. If, in any year, an Underlying ETF fails to qualify as a RIC under the applicable tax laws, the Underlying ETF would be taxed as an ordinary corporation. The federal income tax treatment of certain aspects of the proposed operations of the Underlying ETFs is not entirely clear, which could impact the Underlying ETFs’ ability to qualify as a RIC. This includes the tax aspects of the Underlying ETFs’ options strategy, its hedging strategy, the possible application of the “straddle” rules, and various loss limitation provisions of the Code. The Underlying ETFs’ investments in offsetting positions with respect to the Underlying ETF may affect the character of gains or losses realized by the Underlying ETFs under the Code’s “straddle” rules and may increase any short-term capital gains realized by the Underlying ETFs. Each Underlying ETF 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, each Underlying ETF could lose its own status as a RIC. To maintain its status as a RIC, each Underlying ETF 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, each Underlying ETF 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 an Underlying ETF to recognize income that such Underlying ETF is required to distribute to maintain such Underlying ETF’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 an Underlying ETF. Alternatively, if an Underlying ETF only makes distributions to maintain its RIC status and becomes subject to the excise tax, that could also affect the projected performance of such Underlying ETF. In either case, the assets sold to fund redemptions, distributions or pay the excise tax will not be available to assist the Underlying ETF 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 Underlying ETF will enter into. Based upon language in the legislative history, the Underlying ETFs intend to treat the issuer of the FLEX Options as the referenced asset, which, assuming the referenced asset qualifies as a RIC, would allow the Underlying ETF 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 Underlying ETFs do not believe that the positions held by the Underlying ETFs 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 debt instrument for federal tax purposes. The result of such a position would be that the Underlying ETFs 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. In the event that a shareholder purchases Shares of an Underlying ETF before a distribution by the Underlying ETF, the entire distribution may be taxable to the shareholder even though a portion of the distribution effectively represents a return of the purchase price. Upside Participation Risk. There can be no guarantee that an Underlying ETF will be successful in its strategy to provide the Fund and Fund shareholders with a total return that matches the increase of the U.S. Large Cap ETF over the Outcome Period, up to the maximum return imposed by the Cap. In the event the Fund purchases shares after the date on which the FLEX Options were entered into or does not stay invested in Underlying ETF for the entirety of the Outcome Period, the returns realized by the Fund, and therefore Fund shareholders, may not match those that the Underlying ETF seeks to achieve. 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 an Underlying ETF’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 an Underlying ETF to accurately assign a daily value. |
| Innovator Laddered Allocation Power Buffer ETF | 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 Laddered Allocation Power Buffer ETF | 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 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 Shares, are subject to market fluctuations and liquidity constraints that may be caused by factors such 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 Laddered Allocation Power Buffer 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. 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 value 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, 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 (as defined below) 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 APs 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 S&P Investment Grade Preferred ETF | Risk Lose Money [Member] | |
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| Risk [Text Block] | You could lose money by investing in the Fund. |
| Innovator S&P Investment Grade Preferred 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 S&P Investment Grade Preferred ETF | Investment Strategy Risk [Member] | |
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| Risk [Text Block] | Investment Strategy Risk. The Fund’s investment strategy subjects it to certain unique risks, which are detailed below. Concentration Risk. To the extent that the Index concentrates in the securities of issuers in a particular industry or sector, the Fund will also concentrate its investments to approximately the same extent. The Fund may be susceptible to loss due to adverse occurrences to the extent that the Fund’s investments are concentrated in a particular issuer or issuers, region, market, industry, group of industries, sector or asset class. As of the date of this prospectus, the Fund is concentrated in the financials sector. For more information regarding the risks of the financials sector, see the “Financials Sector Risk.” Credit Ratings Risk. The Index invests in securities rated “investment grade” by S&P, Moody’s or Fitch. Using credit ratings to evaluate the creditworthiness of debt securities can involve certain risks. Ratings assigned by the rating agencies are based upon an analysis completed of the issuer’s credit history and ability to pay interest and repay principal. An investment grade rating generally signifies that a credit rating agency considers the current quality of the security to be sufficient to provide reasonable assurance of the issuer’s ability to meet its obligation to security-holders. However, because the Index followed by the Fund permits investments in securities rated in the lowest tier of investment grade ratings, certain of the investment grade preferred securities the Fund invests in may be considered to be “speculative” in nature. Such securities may entail greater price volatility, principal and income risk, and may be subject to greater uncertainty and/or exposure to adverse conditions. In addition, rating agencies typically rely to a large extent on historical data which may not accurately represent present or future circumstances. Ratings do not purport to reflect the risk of fluctuations in market value of the debt security and are not absolute standards of quality and only express the rating agency’s current opinion of an obligor’s overall financial capacity to pay its financial obligations. A credit rating is not a statement of fact or a recommendation to purchase, sell or hold a debt obligation. Also, credit quality can change suddenly and unexpectedly, and credit ratings may not reflect the issuer’s current financial condition or events since the security was last rated. Rating agencies may have a financial interest in generating business, including from the arranger or issuer of the security that normally pays for that rating, and providing a low rating might affect the rating agency’s prospects for future business. While rating agencies have policies and procedures to address this potential conflict of interest, there is a risk that these policies will fail to prevent a conflict of interest from impacting the rating. Financials Sector Risk. Companies in the financial sector, including retail and commercial banks, insurance companies and financial services companies, may be adversely impacted by many factors, including, among others, government regulations, economic conditions, credit rating downgrades, changes in currency exchange rates, volatile interest rates, decreased liquidity in credit markets and competition from new entrants. Profitability of these companies is largely dependent on the availability and cost of capital and can fluctuate significantly when interest rates change. Credit losses resulting from financial difficulties of borrowers also can negatively impact the sector. These companies are also subject to substantial government regulation and intervention, which may adversely impact the scope of their activities, the prices they can charge, the amount of capital they must maintain, and potentially, their size. The impact of more stringent capital requirements, or recent or future regulation in various countries on any individual financial company or of the financial sector as a whole cannot be predicted. The financial sector is also a target for cyberattacks and may experience technology malfunctions and disruptions. Index Provider Risk. The Fund seeks to achieve returns that generally correspond, before fees and expenses, to the performance of their Index, as published by the Index Provider. There is no assurance that the Index Provider will compile its Index accurately, select securities in accordance with the Index’s methodology properly, or that the Index will be determined, composed, calculated, rebalanced or reconstituted accurately. While the Index Provider gives descriptions of what the Index is designed to achieve, the Index Provider does not provide any warranty or accept any liability in relation to the quality, accuracy or completeness of data in its indices, and it does not guarantee that its Index will be in line with its methodology designed to select quality preferred securities. Interest Rate Risk. An increase in interest rates may cause the value of securities held by the Fund to decline. Fixed income securities with longer durations tend to be more sensitive to changes in interest rates, making them more volatile than securities with shorter durations or floating or adjustable interest rates. The negative impact on the Fund from potential interest rate increases could be swift and significant, including falling market values, increased redemptions and reduced liquidity. Non-Correlation Risk. The Fund’s return may not match the return of the Index for a number of reasons. For example, the Fund incurs operating expenses not applicable to the Index, and incurs costs in buying and selling securities, especially when rebalancing the Fund’s securities holdings to reflect changes in the composition of the Index. Although the Fund currently intends to seek to fully replicate the Index, the Fund may use a representative sampling approach, which may cause the Fund not to be as well-correlated with the return of the Index as would be the case if the Fund purchased all of the securities in the Index in the proportions represented in the Index. In addition, the performance of the Fund and the Index may vary due to asset valuation differences and differences between the Fund’s portfolio and the Index resulting from legal restrictions, cost or liquidity constraints. Passive Investment Risk. The Fund invests in the securities included in the Index regardless of their investment merit. The Fund does not attempt to outperform the Index or take defensive positions in declining markets, except in connection with the Index’s risk reduction mechanism. As a result, the Fund’s performance may be adversely affected by a general decline in the market segments relating to the Index. Preferred Securities Risk. Preferred securities combine some of the characteristics of both common stocks and bonds. Preferred securities are typically subordinated to bonds and other debt securities in a company’s capital structure in terms of priority to corporate income, subjecting them to greater credit risk than those debt securities. Generally, holders of preferred securities have no voting rights with respect to the issuing company unless preferred dividends have been in arrears for a specified number of periods, at which time the preferred security holders may obtain limited rights. In certain circumstances, an issuer of preferred securities may defer payment on the securities and, in some cases, redeem the securities prior to a specified date. Preferred securities may also be substantially less liquid than other securities, including common stock. REIT Risk. A REIT is a financial vehicle that pool investors’ capital to invest primarily in income-producing real estate or real estate-related loans or interests. The Index includes exposure to preferred securities issued by REITs, and the Fund may invest in preferred securities issued by REITs to the extent such securities are constituents of the Index. REITs are subject to the risk that the real estate market may experience an economic downturn generally, which may have a material effect on the real estate in which the REITs invest and their underlying portfolio securities. REITs are dependent upon the skills of their managers and are not necessarily diversified. REITs are generally dependent upon maintaining cash flows to repay borrowings and to make distributions to preferred shareholders and are subject to the risk of default by lessees or borrowers. Investments in Equity REITs are subject to the risks associated with directly investing in real estate, which may include, but are not limited to: fluctuations in the value of underlying properties; defaults by borrowers or tenants; market saturation; changes in general and local operating expenses; and other economic, political or regulatory occurrences affecting companies in the real estate sector. Mortgage REITs are additionally affected by the ability of the issuers of its portfolio mortgages to repay their obligations. REITs also are subject to the possibilities of failing to qualify for tax free pass-through of income under the Internal Revenue Code, and failing to maintain their exemption from registration under the 1940 Act. REITs whose underlying assets are concentrated in properties used by a particular industry are also subject to risks associated with such industry. REITs may have also a relatively small market capitalization which may result in their shares experiencing less market liquidity and greater price volatility than larger companies. 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. Small- and Mid-Capitalization Company 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 S&P Investment Grade Preferred ETF | Cyber Security Risk [Member] | |
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| Risk [Text Block] | Cyber Security Risk. The Fund is susceptible to 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 sub-adviser, as applicable, or issuers in which the Fund invests, can also subject the Fund to many of the same risks associated with direct cyber security breaches. While the Fund has established business continuity plans and risk management systems designed to reduce the risks associated with cyber security, there are inherent limitations in such plans and systems. Additionally, 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 S&P Investment Grade Preferred ETF | 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 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 S&P Investment Grade Preferred ETF | 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. 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 Fund’s Shares are trading on the Exchange which could result in a decrease in value of the Fund’s 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 Funds’ market price. This reduced effectiveness could result in Fund Shares trading at a discount to NAV and in greater than normal intraday bid-ask spreads for Fund Shares. Operational Risk. The Fund is subject to risks arising from various operational factors, including, but not limited to, human error, 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. Although the Fund and its investment adviser seek to reduce these operational risks through controls and procedures, there is no way to completely protect against such 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. Shares trade on the Exchange at market prices that may be below, at or above the Fund’s NAV. 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 APs 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. |