Investment Risks - Nuveen Securitized Income ETF	Sep. 17, 2025
Call Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	Call Risk—If, during periods of falling interest rates, an issuer exercises its right to prepay principal on its higher-yielding debt securities held by the Fund prior to the scheduled maturity date, the Fund may have to reinvest in securities with lower yields or higher risk of default, which may adversely impact the Fund’s performance.
Cash Redemption Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	Cash Redemption Risk—The Fund’s investment strategy may require it to effect redemptions, in whole or in part, in cash. In order to obtain the cash needed for a redemption, the Fund may be required to sell portfolio securities, which may cause the Fund to incur certain costs such as brokerage costs and recognize capital gains or losses that it might not have recognized if it had satisfied the redemption in-kind. Therefore, to the extent the Fund effects redemptions in cash, it may pay out higher annual capital gain distributions than if it satisfied redemptions entirely in-kind. These costs may decrease the Fund’s NAV to the extent not offset by a transaction fee payable by an authorized participant.
CLO Manager Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	CLO Manager Risk—The Fund intends to invest in CLO securities issued by CLOs that are managed by third-party collateral managers. The Fund is dependent on the skill and expertise of such managers. CLO managers are responsible for selecting, managing and replacing the underlying bank loans or bonds within a CLO. CLO managers may have limited operating histories and may be subject to conflicts of interests, including managing the assets of other clients or other investment vehicles, or receiving fees that incentivize maximizing the yield, and indirectly the risk, of a CLO. Adverse developments with respect to a CLO manager, such as personnel and resource constraints, regulatory issues or other developments that may impact the ability and/or performance of the CLO manager, may adversely impact the performance of the CLO securities in which the Fund invests.
Collateralized Loan Obligations Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	Collateralized Loan Obligations Risk—A CLO is an asset-backed security whose underlying collateral is a pool of loans, which may include, among others, floating rate and fixed rate senior secured loans, senior unsecured loans, and subordinate corporate loans, including loans that may be rated below investment grade. In addition to the risks associated with loans and high yield securities, CLOs are subject to the risk that distributions from the collateral may not be adequate to make interest or other payments; the quality of the collateral may decline in value or default; the Fund may invest in tranches of CLOs that are subordinate to other tranches; and the CLO’s manager may perform poorly. CLOs may charge management and other administrative fees, which are in addition to those of the Fund.
Counterparty Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	Counterparty Risk—The Fund may be subject to counterparty risk. If the Fund enters into an investment or transaction that depends on the performance of another party, the Fund becomes subject to the credit risk of that counterparty. The Fund's ability to profit from these types of investments and transactions depends on the willingness and ability of the Fund’s counterparty to perform its obligations. If a counterparty fails to meet its contractual obligations, the Fund may be unable to terminate or realize any gain on the investment or transaction, resulting in a loss to the Fund.
Credit Spread Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	Credit Spread Risk—Credit spread risk is the risk that credit spreads (i.e., the difference in yield between securities that is due to differences in their credit quality) may increase when the market believes that bonds generally have a greater risk of default. Increasing credit spreads may reduce the market values of the Fund’s debt securities. Credit spreads often increase more for lower rated and unrated securities than for investment grade securities. In addition, when credit spreads increase, reductions in market value will generally be greater for longer-maturity securities.
Cybersecurity Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	Cybersecurity Risk—Cybersecurity risk is the risk of an unauthorized breach and access to Fund assets, customer data (including private shareholder information), or proprietary information, or the risk of an incident occurring that causes the Fund, its investment adviser or sub-adviser, custodian, transfer agent, distributor or other service provider, a financial intermediary or the issuers of securities held by the Fund to suffer a data breach, data corruption or lose operational functionality. Successful cyber-attacks or other cyber-failures or events affecting the Fund, its service providers or the issuers of securities held by the Fund may adversely impact the Fund or its shareholders. Additionally, a cybersecurity breach could affect the issuers in which the Fund invests, which may cause the Fund’s investments to lose value.
Dollar Roll Transaction Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	Dollar Roll Transaction Risk—The use of dollar rolls can increase the volatility of the Fund’s share price, and it may have an adverse impact on performance unless the sub-adviser correctly predicts mortgage prepayments and interest rates. These transactions are subject to the risk that the counterparty to the transaction may not, or may be unable to, perform in accordance with the terms of the instrument.
High Yield Securities Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	High Yield Securities Risk—High yield securities, which are rated below investment grade and commonly referred to as “junk” bonds, and unrated securities of comparable quality are high risk investments that may cause income and principal losses for the Fund. They generally are considered to be speculative with respect to the ability to pay interest and repay principal, have greater credit risk, are less liquid, are more likely to experience a default and have more volatile prices than investment grade securities, especially during periods of uncertainty or market turmoil.
Illiquid Investments Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	Illiquid Investments Risk—Certain securities held by the Fund could be or become illiquid investments, which may be difficult to sell for the value at which they are carried, if at all, or at any price within the desired time frame.
Income Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	Income Risk—The Fund’s income could decline during periods of falling interest rates or when the Fund experiences defaults on debt securities it holds.
Interest Rate Risks [Member]
Prospectus [Line Items]
Risk [Text Block]	Interest Rate Risk—Interest rate risk is the risk that the value of the Fund’s fixed-rate securities will decline because of rising interest rates. Changing interest rates, may have unpredictable effects on markets, result in heightened market volatility and detract from the Fund’s performance to the extent that it is exposed to such interest rates. Fixed-rate securities may be subject to a greater risk of rising interest rates than would normally be the case due to the effect of potential government fiscal policy initiatives and resulting market reaction to those initiatives. Higher periods of inflation could lead to government fiscal policies which raise interest rates. When interest rates change, the values of fixed-rate securities with longer durations or maturities usually change more than the values of fixed-rate securities with shorter durations or maturities. Conversely, fixed-rate securities with shorter durations or maturities will be less volatile but may provide lower returns than fixed-rate securities with longer durations or maturities. Rising interest rates also may lengthen the duration of fixed-rate securities with call features, since exercise of the call becomes less likely as interest rates rise, which in turn will make the securities more sensitive to changes in interest rates and result in even steeper price declines in the event of further interest rate increases. The Fund is also subject to the risk that the income generated by its investments may not keep pace with inflation. There is a risk that interest rates across the financial system may change, possibly significantly and/or rapidly. In general, changing interest rates, including rates that fall below zero, or a lack of market participants may lead to decreased liquidity and increased volatility in the fixed-rate market, making it more difficult for the Fund to sell fixed-rate securities. Changes in interest rates may also lead to an increase in Fund redemptions, which may result in higher portfolio turnover costs, thereby adversely affecting the Fund’s performance.
Market Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	Market Risk—The market value of the Fund’s investments may go up or down, sometimes rapidly or unpredictably and for short or extended periods of time, due to the particular circumstances of individual issuers or due to general conditions impacting issuers more broadly. Global economies and financial markets have become highly interconnected, and thus economic, market or political conditions or events in one country or region might adversely impact the value of the Fund’s investments whether or not the Fund invests in such country or region. Events such as war, tariffs, sanctions, and other trade restrictions, terrorism, geopolitical events, financial system instability, natural and environmental disasters and the spread of infectious illnesses or other public health emergencies may have a severe negative impact on the global economy, could cause financial markets to experience extreme volatility and losses, and could result in the disruption of trading and the reduction of liquidity in many instruments. Additionally, to the extent the rate of inflation increases, the value of the Fund’s assets may decline.
Market Liquidity Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	Market Liquidity Risk—Reductions in trading activity or dealer inventories of securities such as bonds, which provide an indication of the ability of financial intermediaries to “make markets” in those securities, have the potential to decrease liquidity and increase price volatility in the markets in which the Fund invests, particularly during periods of economic or market stress. In addition, federal banking regulations may cause certain dealers to reduce their inventories of securities, which may further decrease the Fund’s ability to buy or sell securities. As a result of this decreased liquidity, the Fund may have to accept a lower price to sell a security, sell other securities to raise cash, or give up an investment opportunity, any of which could have a negative effect on performance. Although only certain institutional investors are entitled to redeem shares of the Fund (as described in more detail under “Purchase and Sale of Fund Shares” below), if the Fund is forced to sell underlying investments at reduced prices or under unfavorable conditions to meet redemption requests or for other cash needs, the Fund may suffer a loss and hurt performance.
Market Trading Risks [Member]
Prospectus [Line Items]
Risk [Text Block]	Market Trading Risks—The Fund is an ETF, and as with all ETFs, Fund shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of a Fund share typically will approximate its net asset value (“NAV”), there may be times when the market price and the NAV diverge more significantly, particularly in times of market volatility or steep market declines. Thus, you may pay more or less than NAV when you buy Fund shares on the secondary market, and you may receive more or less than NAV when you sell those shares. Although the Fund’s shares are listed for trading on a national securities exchange, it is possible that an active trading market may not develop or be maintained, in which case transactions may occur at wider bid/ask spreads (which may be especially pronounced for smaller funds). Trading of the Fund’s shares may be halted by the activation of individual or market-wide trading halts (which halt trading for a specific period of time when the price of a particular security or overall market prices decline by a specified percentage). In times of market stress, the Fund’s underlying portfolio holdings may become less liquid, which in turn may affect the liquidity of the Fund’s shares and/or lead to more significant differences between the Fund’s market price and its NAV. Market makers are under no obligation to make a market in the Fund’s shares, and authorized participants are not obligated to submit purchase or redemption orders for the Fund’s shares. In the event market makers cease making a market in the Fund’s shares or authorized participants stop submitting creation or redemption orders, Fund shares may trade at a larger premium or discount to NAV.
Mortgage and Asset Backed Securities Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	Mortgage- and Asset-Backed Securities Risk—Mortgage- and asset-backed securities generally can be prepaid at any time, and prepayments that occur either more quickly or more slowly than expected can adversely impact the value of such securities. They are also subject to extension risk, which is the risk that rising interest rates could cause mortgages or other obligations underlying the securities to be prepaid more slowly than expected, thereby lengthening the duration of such securities, increasing their sensitivity to interest rate changes and causing their prices to decline. Mortgage-backed securities are particularly sensitive to prepayment risk, given that the term to maturity for mortgage loans is generally substantially longer than the expected lives of those securities. A mortgage-backed security may be negatively affected by the quality of the mortgages underlying such security, the credit quality of its issuer or guarantor, and the nature and structure of its credit support. Mortgage- and asset-backed securities that are not backed by the full faith and credit of the U.S. government (i.e., non-agency mortgage-backed securities) are subject to the risk of default on the underlying mortgage, loan or asset, particularly during periods of economic downturn.
Restricted Securities Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	Restricted Securities Risk—The market for restricted securities, including Rule 144A securities, typically is less active than the market for publicly traded securities. Rule 144A securities and other securities exempt from registration under the Securities Act carry the risk that their liquidity may become impaired and the Fund may be unable to dispose of the securities promptly or at current market value.
Service Provider Operational Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	Service Provider Operational Risk—The Fund’s service providers, such as the Fund’s administrator, custodian or transfer agent, may experience disruptions or operating errors that could negatively impact the Fund. Although service providers are required to have appropriate operational risk management policies and procedures, and to take appropriate precautions to avoid and mitigate risks that could lead to disruptions and operating errors, it may not be possible to identify all of the operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects.
Structured Products Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	Structured Products Risk—Holders of structured product securities bear risks of the underlying investments, index or reference obligation. Certain structured products may be thinly traded or have a limited trading market, and as a result may be characterized as illiquid. The possible lack of a liquid secondary market for structured products and the resulting inability of the Fund to sell a structured product could expose the Fund to losses and could make structured products more difficult for the Fund to value accurately, which may also result in additional costs. Structured products are also subject to credit risk; the assets backing the structured product may be insufficient to pay interest or principal. In addition to the general risks associated with investments in fixed income, structured products carry additional risks, including, but not limited to: the possibility that distributions from collateral securities will not be adequate to make interest or other payments; the quality of the collateral may decline in value or default; and the possibility that the structured products are subordinate to other classes. Structured products include privately negotiated debt obligations where the principal and/or interest or value of the structured product is determined by reference to the performance of a specific asset, benchmark asset, market or interest rate (“reference instrument”), and changes in the reference instrument or security may cause significant price fluctuations, or could cause the interest rate on the structured product to be reduced to zero. Holders of structured products indirectly bear risks associated with the reference instrument, are subject to counterparty risk and typically do not have direct rights against the reference instrument. Structured products may also entail structural complexity and documentation risk and there is no guarantee that the courts or administrators will interpret the priority of principal and interest payments as expected.
Unrated Security Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	Unrated Security Risk—Unrated securities determined by the Fund’s sub-adviser to be of comparable quality to rated securities which the Fund may purchase may pay a higher interest rate than such rated securities and be subject to a greater risk of illiquidity or price changes. Less public information is typically available about unrated securities or issuers than rated securities or issuers.
US Government Securities Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	U.S. Government Securities Risk—U.S. government securities are guaranteed only as to the timely payment of interest and the payment of principal when held to maturity. Accordingly, the current market values for these securities will fluctuate with changes in interest rates. Securities issued or guaranteed by U.S. government agencies and instrumentalities are supported by varying degrees of credit but generally are not backed by the full faith and credit of the U.S. government. No assurance can be given that the U.S. government will provide financial support to its agencies and instrumentalities if it is not obligated by law to do so.
Valuation Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	Valuation Risk—The debt securities in which the Fund invests typically are valued by a pricing service utilizing a range of market-based inputs and assumptions, including price quotations obtained from broker-dealers making markets in such instruments, cash flows and transactions for comparable instruments. There is no assurance that the Fund will be able to buy or sell a portfolio security at the price established by the pricing service, which could result in a gain or loss to the Fund. Pricing services generally price debt securities assuming orderly transactions of an institutional “round lot” size, but some trades may occur in smaller, “odd lot” sizes, often at lower prices than institutional round lot trades. Over certain time periods, such differences could materially impact the performance of the Fund, which may not be sustainable. Alternative pricing services may incorporate different assumptions and inputs into their valuation methodologies, potentially resulting in different values for the same securities. As a result, if the Fund were to change pricing services, or if the Fund’s pricing service were to change its valuation methodology, there could be a material impact, either positive or negative, on the Fund’s net asset value.
Credit Risks [Member]
Prospectus [Line Items]
Risk [Text Block]	Credit Risk—Credit risk is the risk that an issuer or other obligated party of a debt security may be, or perceived (whether by market participants, rating agencies, pricing services or otherwise) to be, unable or unwilling to make interest and principal payments when due and the related risk that the value of a debt security may decline because of concerns about the issuer’s ability or willingness to make such payments. Because the Fund may invest up to 50% of its total assets in high yield securities, the Fund’s credit risks are greater than those of funds that buy only investment grade securities.
Derivatives Risks [Member]
Prospectus [Line Items]
Risk [Text Block]	Derivatives Risk—The use of derivatives involves additional risks and transaction costs which could leave the Fund in a worse position than if it had not used these instruments. Derivative instruments can be used to acquire or to transfer the risk and returns of a security or other asset without buying or selling the security or asset. These instruments may entail investment exposures that are greater than their cost would suggest. As a result, a small investment in derivatives can result in losses that greatly exceed the original investment. Derivatives can be highly volatile, illiquid and difficult to value. An over-the-counter derivative transaction between the Fund and a counterparty that is not cleared through a central counterparty also involves the risk that a loss may be sustained as a result of the failure of the counterparty to the contract to make required payments. The payment obligation for a cleared derivative transaction is guaranteed by a central counterparty, which exposes the Fund to the creditworthiness of the central counterparty.
Prepayment Risks [Member]
Prospectus [Line Items]
Risk [Text Block]	Prepayment Risk—Prepayment risk is the risk that the borrower of a debt security will repay principal prior to the scheduled maturity date. Debt securities allowing prepayment may offer less potential for gains during a period of declining interest rates, as the Fund may be required to reinvest the proceeds of any prepayment at lower interest rates.
Active Management Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	Active Management Risk—The Fund’s sub-adviser actively manages the Fund’s investments. Consequently, the Fund is subject to the risk that the investment techniques and risk analyses employed by the Fund’s sub-adviser, including its use of proprietary and third-party technology systems, models, algorithms and data management software, may not produce the desired results. This could cause the Fund to lose value or its investment results to lag relevant benchmarks or other funds with similar objectives.
Risk Lose Money [Member]
Prospectus [Line Items]
Risk [Text Block]	You could lose money by investing in the Fund.
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 government agency.
Risk Nondiversified Status [Member]
Prospectus [Line Items]
Risk [Text Block]	Non-Diversification Risk—As a non-diversified fund, the Fund may invest a larger portion of its assets in the securities of a limited number of issuers and may be more sensitive to any single economic, business, political or regulatory occurrence affecting an issuer than a diversified fund. Poor performance by any one of these issuers would adversely affect the Fund to a greater extent than a more broadly diversified fund.

Investment Risks - Nuveen Securitized Income ETF

Sep. 17, 2025

Call Risk—If, during periods of falling interest rates, an issuer exercises its right to prepay principal on its higher-yielding debt securities held by the Fund prior to the scheduled maturity date, the Fund may have to reinvest in securities with lower yields or higher risk of default, which may adversely impact the Fund’s performance.

Prospectus [Line Items]

Risk [Text Block]

Cash Redemption Risk—The Fund’s investment strategy may require it to effect redemptions, in whole or in part, in cash. In order to obtain the cash needed for a redemption, the Fund may be required to sell portfolio securities, which may cause the Fund to incur certain costs such as brokerage costs and recognize capital gains or losses that it might not have recognized if it had satisfied the redemption in-kind. Therefore, to the extent the Fund effects redemptions in cash, it may pay out higher annual capital gain distributions than if it satisfied redemptions entirely in-kind. These costs may decrease the Fund’s NAV to the extent not offset by a transaction fee payable by an authorized participant.

CLO Manager Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

CLO Manager Risk—The Fund intends to invest in CLO securities issued by CLOs that are managed by third-party collateral managers. The Fund is dependent on the skill and expertise of such managers. CLO managers are responsible for selecting, managing and replacing the underlying bank loans or bonds within a CLO. CLO managers may have limited operating histories and may be subject to conflicts of interests, including managing the assets of other clients or other investment vehicles, or receiving fees that incentivize maximizing the yield, and indirectly the risk, of a CLO. Adverse developments with respect to a CLO manager, such as personnel and resource constraints, regulatory issues or other developments that may impact the ability and/or performance of the CLO manager, may adversely impact the performance of the CLO securities in which the Fund invests.

Collateralized Loan Obligations Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

Collateralized Loan Obligations Risk—A CLO is an asset-backed security whose underlying collateral is a pool of loans, which may include, among others, floating rate and fixed rate senior secured loans, senior unsecured loans, and subordinate corporate loans, including loans that may be rated below investment grade. In addition to the risks associated with loans and high yield securities, CLOs are subject to the risk that distributions from the collateral may not be adequate to make interest or other payments; the quality of the collateral may decline in value or default; the Fund may invest in tranches of CLOs that are subordinate to other tranches; and the CLO’s manager may perform poorly. CLOs may charge management and other administrative fees, which are in addition to those of the Fund.

Counterparty Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

Counterparty Risk—The Fund may be subject to counterparty risk. If the Fund enters into an investment or transaction that depends on the performance of another party, the Fund becomes subject to the credit risk of that counterparty. The Fund's ability to profit from these types of investments and transactions depends on the willingness and ability of the Fund’s counterparty to perform its obligations. If a counterparty fails to meet its contractual obligations, the Fund may be unable to terminate or realize any gain on the investment or transaction, resulting in a loss to the Fund.

Credit Spread Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

Credit Spread Risk—Credit spread risk is the risk that credit spreads (i.e., the difference in yield between securities that is due to differences in their credit quality) may increase when the market believes that bonds generally have a greater risk of default. Increasing credit spreads may reduce the market values of the Fund’s debt securities. Credit spreads often increase more for lower rated and unrated securities than for investment grade securities. In addition, when credit spreads increase, reductions in market value will generally be greater for longer-maturity securities.

Cybersecurity Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

Cybersecurity Risk—Cybersecurity risk is the risk of an unauthorized breach and access to Fund assets, customer data (including private shareholder information), or proprietary information, or the risk of an incident occurring that causes the Fund, its investment adviser or sub-adviser, custodian, transfer agent, distributor or other service provider, a financial intermediary or the issuers of securities held by the Fund to suffer a data breach, data corruption or lose operational functionality. Successful cyber-attacks or other cyber-failures or events affecting the Fund, its service providers or the issuers of securities held by the Fund may adversely impact the Fund or its shareholders. Additionally, a cybersecurity breach could affect the issuers in which the Fund invests, which may cause the Fund’s investments to lose value.

Dollar Roll Transaction Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

Dollar Roll Transaction Risk—The use of dollar rolls can increase the volatility of the Fund’s share price, and it may have an adverse impact on performance unless the sub-adviser correctly predicts mortgage prepayments and interest rates. These transactions are subject to the risk that the counterparty to the transaction may not, or may be unable to, perform in accordance with the terms of the instrument.

High Yield Securities Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

High Yield Securities Risk—High yield securities, which are rated below investment grade and commonly referred to as “junk” bonds, and unrated securities of comparable quality are high risk investments that may cause income and principal losses for the Fund. They generally are considered to be speculative with respect to the ability to pay interest and repay principal, have greater credit risk, are less liquid, are more likely to experience a default and have more volatile prices than investment grade securities, especially during periods of uncertainty or market turmoil.

Illiquid Investments Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

Illiquid Investments Risk—Certain securities held by the Fund could be or become illiquid investments, which may be difficult to sell for the value at which they are carried, if at all, or at any price within the desired time frame.

Income Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

Income Risk—The Fund’s income could decline during periods of falling interest rates or when the Fund experiences defaults on debt securities it holds.

Interest Rate Risks [Member]

Prospectus [Line Items]

Risk [Text Block]

Interest Rate Risk—Interest rate risk is the risk that the value of the Fund’s fixed-rate securities will decline because of rising interest rates. Changing interest rates, may have unpredictable effects on markets, result in heightened market volatility and detract from the Fund’s performance to the extent that it is exposed to such interest rates. Fixed-rate securities may be subject to a greater risk of rising interest rates than would normally be the case due to the effect of potential government fiscal policy initiatives and resulting market reaction to those initiatives. Higher periods of inflation could lead to government fiscal policies which raise interest rates. When interest rates change, the values of fixed-rate securities with longer durations or maturities usually change more than the values of fixed-rate securities with shorter durations or maturities. Conversely, fixed-rate securities with shorter durations or maturities will be less volatile but may

provide lower returns than fixed-rate securities with longer durations or maturities. Rising interest rates also may lengthen the duration of fixed-rate securities with call features, since exercise of the call becomes less likely as interest rates rise, which in turn will make the securities more sensitive to changes in interest rates and result in even steeper price declines in the event of further interest rate increases. The Fund is also subject to the risk that the income generated by its investments may not keep pace with inflation. There is a risk that interest rates across the financial system may change, possibly significantly and/or rapidly. In general, changing interest rates, including rates that fall below zero, or a lack of market participants may lead to decreased liquidity and increased volatility in the fixed-rate market, making it more difficult for the Fund to sell fixed-rate securities. Changes in interest rates may also lead to an increase in Fund redemptions, which may result in higher portfolio turnover costs, thereby adversely affecting the Fund’s performance.

Market Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

Market Risk—The market value of the Fund’s investments may go up or down, sometimes rapidly or unpredictably and for short or extended periods of time, due to the particular circumstances of individual issuers or due to general conditions impacting issuers more broadly. Global economies and financial markets have become highly interconnected, and thus economic, market or political conditions or events in one country or region might adversely impact the value of the Fund’s investments whether or not the Fund invests in such country or region. Events such as war, tariffs, sanctions, and other trade restrictions, terrorism, geopolitical events, financial system instability, natural and environmental disasters and the spread of infectious illnesses or other public health emergencies may have a severe negative impact on the global economy, could cause financial markets to experience extreme volatility and losses, and could result in the disruption of trading and the reduction of liquidity in many instruments. Additionally, to the extent the rate of inflation increases, the value of the Fund’s assets may decline.

Market Liquidity Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

Market Liquidity Risk—Reductions in trading activity or dealer inventories of securities such as bonds, which provide an indication of the ability of financial intermediaries to “make markets” in those securities, have the potential to decrease liquidity and increase price volatility in the markets in which the Fund invests, particularly during periods of economic or market stress. In addition, federal banking regulations may cause certain dealers to reduce their inventories of securities, which may further decrease the Fund’s ability to buy or sell securities. As a result of this decreased liquidity, the Fund may have to accept a lower price to sell a security, sell other securities to raise cash, or give up an investment opportunity, any of which could have a negative effect on performance. Although only certain institutional investors are entitled to redeem shares of the Fund (as described in more detail under “Purchase and Sale of Fund Shares” below), if the Fund is forced to sell underlying investments at reduced prices or under unfavorable conditions to meet redemption requests or for other cash needs, the Fund may suffer a loss and hurt performance.

Market Trading Risks [Member]

Prospectus [Line Items]

Risk [Text Block]

Market Trading Risks—The Fund is an ETF, and as with all ETFs, Fund shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of a Fund share typically will approximate its net asset value (“NAV”), there may be times when the market price and the NAV diverge more significantly, particularly in times of market volatility or steep market declines. Thus, you may pay more or less than NAV when you buy Fund shares on the secondary market, and you may receive more or less than NAV when you sell those shares. Although the Fund’s shares are listed for trading on a national securities exchange, it is possible that an active trading market may not develop or be maintained, in which case transactions may occur at wider bid/ask spreads (which may be especially pronounced for smaller funds). Trading of the Fund’s shares may be halted by the activation of individual or market-wide trading halts (which halt trading for a specific period of time when the price of a particular security or overall market prices decline by a specified percentage). In times of market stress, the Fund’s underlying portfolio holdings may become less liquid, which in turn may affect the liquidity of the Fund’s shares and/or lead to more significant differences between the Fund’s market price and its NAV. Market makers are under no obligation to make a market in the Fund’s shares, and authorized participants are not obligated to submit purchase or redemption orders for the Fund’s shares. In the event market makers cease making a market in the Fund’s shares or authorized participants stop submitting creation or redemption orders, Fund shares may trade at a larger premium or discount to NAV.

Mortgage and Asset Backed Securities Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

Mortgage- and Asset-Backed Securities Risk—Mortgage- and asset-backed securities generally can be prepaid at any time, and prepayments that occur either more quickly or more slowly than expected can adversely impact the value of such securities. They are also subject to extension risk, which is the risk that rising interest rates could cause mortgages or other obligations underlying the securities to be prepaid more slowly than expected, thereby lengthening the duration of such securities, increasing their sensitivity to interest rate changes and causing their prices to decline. Mortgage-backed securities are particularly sensitive to prepayment risk, given that the term to maturity for mortgage loans is generally substantially longer than the expected lives of those securities. A mortgage-backed security may be negatively affected by the quality of the mortgages underlying such security, the credit quality of its issuer or guarantor, and the nature and structure of its credit support. Mortgage- and asset-backed securities that are not backed by the full faith and credit of the

U.S. government (i.e., non-agency mortgage-backed securities) are subject to the risk of default on the underlying mortgage, loan or asset, particularly during periods of economic downturn.

Restricted Securities Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

Restricted Securities Risk—The market for restricted securities, including Rule 144A securities, typically is less active than the market for publicly traded securities. Rule 144A securities and other securities exempt from registration under the Securities Act carry the risk that their liquidity may become impaired and the Fund may be unable to dispose of the securities promptly or at current market value.

Service Provider Operational Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

Service Provider Operational Risk—The Fund’s service providers, such as the Fund’s administrator, custodian or transfer agent, may experience disruptions or operating errors that could negatively impact the Fund. Although service providers are required to have appropriate operational risk management policies and procedures, and to take appropriate precautions to avoid and mitigate risks that could lead to disruptions and operating errors, it may not be possible to identify all of the operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects.

Structured Products Risk [Member]

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Structured Products Risk—Holders of structured product securities bear risks of the underlying investments, index or reference obligation. Certain structured products may be thinly traded or have a limited trading market, and as a result may be characterized as illiquid. The possible lack of a liquid secondary market for structured products and the resulting inability of the Fund to sell a structured product could expose the Fund to losses and could make structured products more difficult for the Fund to value accurately, which may also result in additional costs. Structured products are also subject to credit risk; the assets backing the structured product may be insufficient to pay interest or principal. In addition to the general risks associated with investments in fixed income, structured products carry additional risks, including, but not limited to: the possibility that distributions from collateral securities will not be adequate to make interest or other payments; the quality of the collateral may decline in value or default; and the possibility that the structured products are subordinate to other classes. Structured products include privately negotiated debt obligations where the principal and/or interest or value of the structured product is determined by reference to the performance of a specific asset, benchmark asset, market or interest rate (“reference instrument”), and changes in the reference instrument or security may cause significant price fluctuations, or could cause the interest rate on the structured product to be reduced to zero. Holders of structured products indirectly bear risks associated with the reference instrument, are subject to counterparty risk and typically do not have direct rights against the reference instrument. Structured products may also entail structural complexity and documentation risk and there is no guarantee that the courts or administrators will interpret the priority of principal and interest payments as expected.

Unrated Security Risk [Member]

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Unrated Security Risk—Unrated securities determined by the Fund’s sub-adviser to be of comparable quality to rated securities which the Fund may purchase may pay a higher interest rate than such rated securities and be subject to a greater risk of illiquidity or price changes. Less public information is typically available about unrated securities or issuers than rated securities or issuers.

US Government Securities Risk [Member]

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U.S. Government Securities Risk—U.S. government securities are guaranteed only as to the timely payment of interest and the payment of principal when held to maturity. Accordingly, the current market values for these securities will fluctuate with changes in interest rates. Securities issued or guaranteed by U.S. government agencies and instrumentalities are supported by varying degrees of credit but generally are not backed by the full faith and credit of the U.S. government. No assurance can be given that the U.S. government will provide financial support to its agencies and instrumentalities if it is not obligated by law to do so.

Valuation Risk [Member]

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Valuation Risk—The debt securities in which the Fund invests typically are valued by a pricing service utilizing a range of market-based inputs and assumptions, including price quotations obtained from broker-dealers making markets in such instruments, cash flows and transactions for comparable instruments. There is no assurance that the Fund will be able to buy or sell a portfolio security at the price established by the pricing service, which could result in a gain or loss to the Fund. Pricing services generally price debt securities assuming orderly transactions of an institutional “round lot” size, but some trades may occur in smaller, “odd lot” sizes, often at lower prices than institutional round lot trades. Over certain

time periods, such differences could materially impact the performance of the Fund, which may not be sustainable. Alternative pricing services may incorporate different assumptions and inputs into their valuation methodologies, potentially resulting in different values for the same securities. As a result, if the Fund were to change pricing services, or if the Fund’s pricing service were to change its valuation methodology, there could be a material impact, either positive or negative, on the Fund’s net asset value.

Credit Risks [Member]

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Credit Risk—Credit risk is the risk that an issuer or other obligated party of a debt security may be, or perceived (whether by market participants, rating agencies, pricing services or otherwise) to be, unable or unwilling to make interest and principal payments when due and the related risk that the value of a debt security may decline because of concerns about the issuer’s ability or willingness to make such payments. Because the Fund may invest up to 50% of its total assets in high yield securities, the Fund’s credit risks are greater than those of funds that buy only investment grade securities.

Derivatives Risks [Member]

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Derivatives Risk—The use of derivatives involves additional risks and transaction costs which could leave the Fund in a worse position than if it had not used these instruments. Derivative instruments can be used to acquire or to transfer the risk and returns of a security or other asset without buying or selling the security or asset. These instruments may entail investment exposures that are greater than their cost would suggest. As a result, a small investment in derivatives can result in losses that greatly exceed the original investment. Derivatives can be highly volatile, illiquid and difficult to value. An over-the-counter derivative transaction between the Fund and a counterparty that is not cleared through a central counterparty also involves the risk that a loss may be sustained as a result of the failure of the counterparty to the contract to make required payments. The payment obligation for a cleared derivative transaction is guaranteed by a central counterparty, which exposes the Fund to the creditworthiness of the central counterparty.

Prepayment Risks [Member]

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Prepayment Risk—Prepayment risk is the risk that the borrower of a debt security will repay principal prior to the scheduled maturity date. Debt securities allowing prepayment may offer less potential for gains during a period of declining interest rates, as the Fund may be required to reinvest the proceeds of any prepayment at lower interest rates.

Active Management Risk [Member]

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Active Management Risk—The Fund’s sub-adviser actively manages the Fund’s investments. Consequently, the Fund is subject to the risk that the investment techniques and risk analyses employed by the Fund’s sub-adviser, including its use of proprietary and third-party technology systems, models, algorithms and data management software, may not produce the desired results. This could cause the Fund to lose value or its investment results to lag relevant benchmarks or other funds with similar objectives.

Risk Lose Money [Member]

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You could lose money by investing in the Fund.

Risk Not Insured Depository Institution [Member]

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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 government agency.

Risk Nondiversified Status [Member]

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Non-Diversification Risk—As a non-diversified fund, the Fund may invest a larger portion of its assets in the securities of a limited number of issuers and may be more sensitive to any single economic, business, political or regulatory occurrence affecting an issuer than a diversified fund. Poor performance by any one of these issuers would adversely affect the Fund to a greater extent than a more broadly diversified fund.