Investment Strategy	Dec. 31, 2025
Nuveen Short-Term REIT ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the Index, which is comprised of real estate investment trusts (“REITs”). REITs are publicly traded corporations or trusts that invest in residential or commercial real estate. The Index is a subset of the Dow Jones U.S. Select REIT Index (the “Base Index”), which generally includes equity REITs traded on a national securities exchange in the United States that derive at least 75% of their total revenue from the ownership and operation of real estate assets and that have a minimum total market capitalization of $200 million at the time of their inclusion. The Index selects REITs from the Base Index that are classified as concentrating their holdings in apartment buildings, hotels, self-storage facilities or manufactured home properties, as REITs investing in these sectors typically have shorter lease durations than REITs investing in other sectors. Index holdings are weighted by float-adjusted market capitalization, provided that no single REIT can comprise more than 5% of the Index as of any rebalance date. “Float-adjusted” means that the share amounts used in calculating the Index reflect only shares available to investors, with shares held by control groups, public companies and government agencies excluded. The Index is rebalanced quarterly after the close of the third Friday in March, June, September and December. The Index and the Base Index exclude mortgage REITs, hybrid REITs, certain other types of REITs (e.g., timber and net-lease REITs), real estate finance companies, mortgage brokers and bankers, commercial and residential real estate brokers and estate agents, home builders, large landowners and subdividers of unimproved land, and companies that have more than 25% of their assets in direct mortgage investments. As of March 31, 2026, the Index was comprised of 31 REITs. The Fund attempts to replicate the Index by investing all, or substantially all, of its assets in the REITs that make up the Index, holding each REIT in approximately the same proportion as its weighting in the Index. The Fund rebalances its holdings quarterly in response to the quarterly Index rebalances. The Fund may sell REITs that are represented in the Index, in anticipation of their removal from the Index, or buy REITs that are not yet represented in the Index in anticipation of their addition to the Index. Under normal market conditions, the Fund invests at least 80% of the sum of its net assets and the amount of any borrowings for investment purposes in REITs. The Index concentrates (i.e., holds 25% or more of its total assets) in the securities of the real estate industry, and the Fund will concentrate its investments to approximately the same extent as the Index.
Strategy Portfolio Concentration [Text]	Under normal market conditions, the Fund invests at least 80% of the sum of its net assets and the amount of any borrowings for investment purposes in REITs. The Index concentrates (i.e., holds 25% or more of its total assets) in the securities of the real estate industry, and the Fund will concentrate its investments to approximately the same extent as the Index.
Nuveen International Aggregate Bond ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results, before fees and expenses, of the Bloomberg Global Aggregate ex-USD (Hedged) Index (the “Index”), which is comprised of investment grade fixed rate sovereign and government-related debt, corporate and securitized bonds from both developed and emerging market issuers. The Index contains securities that must be issued in currencies other than the U.S. dollar with maturities of at least one year. Additionally, securities must be rated investment grade (Baa3/BBB-/BBB- or better) using the middle rating from Moody’s Investors Service, Inc. (“Moody’s”), S&P Global Ratings (“S&P”) and Fitch Ratings, Inc. (“Fitch”) after dropping the highest and lowest available ratings. If only two agencies rate a security, then the more conservative (lower) rating will be used. If only one rating agency rates a security, then that one rating will be used. Excluded from the Index are subordinated debt, convertible securities, floating-rate notes, fixed-rate perpetuals, warrants, inflation-linked bonds, and structured notes. The Index is market capitalization weighted and the securities in the Index are updated on the last business day of each month. The Index seeks to address the currency risk of the securities comprising the Index by undertaking on a monthly basis certain strategies intended to keep the Index’s currency exposure effectively in U.S. dollars, such as the use of currency forwards. Neither Nuveen Asset Management, LLC, the Fund’s sub-adviser (the “sub-adviser”) nor its affiliates have any discretion to select Index components or change the Index methodology. As of December 31, 2025, the Index was comprised of 14,055 securities. The Index is expected to be comprised of global investment grade debt from twenty-six local currency markets. It is expected that a significant portion of the Fund's portfolio will be comprised of non-U.S. dollar bonds, although the Fund's exposure may change over time. The Fund generally uses a representative sampling strategy to achieve its investment objective, meaning it generally invests in a sample of the securities in the Index whose risk, return and other characteristics resemble the risk, return and other characteristics of the Index as a whole. The Index is rebalanced and reconstituted monthly. The Fund makes corresponding changes to its portfolio shortly after any Index changes are made public. Under normal market conditions, the Fund invests at least 80% of the sum of its net assets and the amount of any borrowings for investment purposes in component securities of the Index. To the extent the Index concentrates (i.e., holds 25% or more of its total assets) in the securities of companies in a particular industry or group of industries, the Fund will concentrate its investments to approximately the same extent as the Index. In addition, in seeking to track the Index, the Fund may invest in debt securities that are not included in the Index. The Fund may invest in asset-backed and mortgage-backed securities, including securities not backed by the full faith and credit of the U.S. government (for example, non-agency mortgage-backed securities). The Fund may also invest in cash and cash equivalents or money market instruments for cash management purposes. The Fund may also invest in exchange-traded funds (“ETFs”) and enter into forward currency exchange contracts for hedging and/or investment purposes. Swaps and futures contracts may be used by the Fund in seeking performance that corresponds to its Index and in managing cash flows. The Fund is “non-diversified” and therefore is not required to meet certain diversification requirements under the Investment Company Act of 1940, as amended (the “1940 Act”).
Strategy Portfolio Concentration [Text]	Under normal market conditions, the Fund invests at least 80% of the sum of its net assets and the amount of any borrowings for investment purposes in component securities of the Index. To the extent the Index concentrates (i.e., holds 25% or more of its total assets) in the securities of companies in a particular industry or group of industries, the Fund will concentrate its investments to approximately the same extent as the Index.

Investment Strategy

Dec. 31, 2025

Principal Investment Strategies

The Fund seeks to track the investment results of the Index, which is comprised of real estate investment trusts (“REITs”). REITs are publicly traded corporations or trusts that invest in residential or commercial real estate. The Index is a subset of the Dow Jones U.S. Select REIT Index (the “Base Index”), which generally includes equity REITs traded on a national securities exchange in the United States that derive at least 75% of their total revenue from the ownership and operation of real estate assets and that have a minimum total market capitalization of $200 million at the time of their inclusion. The Index selects REITs from the Base Index that are classified as concentrating their holdings in apartment buildings, hotels, self-storage facilities or manufactured home properties, as REITs investing in these sectors typically have shorter lease durations than REITs investing in other sectors. Index holdings are weighted by float-adjusted market capitalization, provided that no single REIT can comprise more than 5% of the Index as of any rebalance date. “Float-adjusted” means that the share amounts used in calculating the Index reflect only shares available to investors, with shares held by control groups, public companies and government agencies excluded.

The Index is rebalanced quarterly after the close of the third Friday in March, June, September and December. The Index and the Base Index exclude mortgage REITs, hybrid REITs, certain other types of REITs (e.g., timber and net-lease REITs), real estate finance companies, mortgage brokers and bankers, commercial and residential real estate brokers

and estate agents, home builders, large landowners and subdividers of unimproved land, and companies that have more than 25% of their assets in direct mortgage investments. As of March 31, 2026, the Index was comprised of 31 REITs.

The Fund attempts to replicate the Index by investing all, or substantially all, of its assets in the REITs that make up the Index, holding each REIT in approximately the same proportion as its weighting in the Index. The Fund rebalances its holdings quarterly in response to the quarterly Index rebalances. The Fund may sell REITs that are represented in the Index, in anticipation of their removal from the Index, or buy REITs that are not yet represented in the Index in anticipation of their addition to the Index.

Under normal market conditions, the Fund invests at least 80% of the sum of its net assets and the amount of any borrowings for investment purposes in REITs. The Index concentrates (i.e., holds 25% or more of its total assets) in the securities of the real estate industry, and the Fund will concentrate its investments to approximately the same extent as the Index.

Strategy Portfolio Concentration [Text]

Nuveen International Aggregate Bond ETF

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

The Fund seeks to track the investment results, before fees and expenses, of the Bloomberg Global Aggregate ex-USD (Hedged) Index (the “Index”), which is comprised of investment grade fixed rate sovereign and government-related debt, corporate and securitized bonds from both developed and emerging market issuers. The Index contains securities that must be issued in currencies other than the U.S. dollar with maturities of at least one year. Additionally, securities must be rated investment grade (Baa3/BBB-/BBB- or better) using the middle rating from Moody’s Investors Service, Inc. (“Moody’s”), S&P Global Ratings (“S&P”) and Fitch Ratings, Inc. (“Fitch”) after dropping the highest and lowest available ratings. If only two agencies rate a security, then the more conservative (lower) rating will be used. If only one rating agency rates a security, then that one rating will be used. Excluded from the Index are subordinated debt, convertible securities, floating-rate notes, fixed-rate perpetuals, warrants, inflation-linked bonds, and structured notes. The Index is market capitalization weighted and the securities in the Index are updated on the last business day of each month. The Index seeks to address the currency risk of the securities comprising the Index by undertaking on a monthly basis certain strategies intended to keep the Index’s currency exposure effectively in U.S. dollars, such as the use of currency forwards. Neither Nuveen Asset Management, LLC, the Fund’s sub-adviser (the “sub-adviser”) nor its affiliates have any discretion to select Index components or change the Index methodology. As of December 31, 2025, the Index was comprised of 14,055 securities.

The Index is expected to be comprised of global investment grade debt from twenty-six local currency markets. It is expected that a significant portion of the Fund's portfolio will be comprised of non-U.S. dollar bonds, although the Fund's exposure may change over time.

The Fund generally uses a representative sampling strategy to achieve its investment objective, meaning it generally invests in a sample of the securities in the Index whose risk, return and other characteristics resemble the risk, return and other characteristics of the Index as a whole. The Index is rebalanced and reconstituted monthly. The Fund makes corresponding changes to its portfolio shortly after any Index changes are made public.

Under normal market conditions, the Fund invests at least 80% of the sum of its net assets and the amount of any borrowings for investment purposes in component securities of the Index. To the extent the Index concentrates (i.e., holds 25% or more of its total assets) in the securities of companies in a particular industry or group of industries, the Fund will concentrate its investments to approximately the same extent as the Index. In addition, in seeking to track the Index, the Fund may invest in debt securities that are not included in the Index. The Fund may invest in asset-backed and mortgage-backed securities, including securities not backed by the full faith and credit of the U.S. government (for example, non-agency mortgage-backed securities). The Fund may also invest in cash and cash equivalents or money market instruments for cash management purposes. The Fund may also invest in exchange-traded funds (“ETFs”) and enter into forward currency exchange contracts for hedging and/or investment purposes. Swaps and futures contracts may be used by the Fund in seeking performance that corresponds to its Index and in managing cash flows.

The Fund is “non-diversified” and therefore is not required to meet certain diversification requirements under the Investment Company Act of 1940, as amended (the “1940 Act”).

Strategy Portfolio Concentration [Text]