S000055646 [Member] Investment Risks - Nuveen Short-Term REIT ETF |
Dec. 31, 2025 |
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| Cybersecurity Risk [Member] | |
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| 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.
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| Equity Security Risk [Member] | |
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| Risk [Text Block] | Equity Security Risk—Equity securities in the Fund’s portfolio may decline significantly in price over short or extended periods of time, and such declines may occur because of declines in the equity market as a whole, or because of declines in only a particular country, company, industry, or sector of the market.
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| Index Provider Risk [Member] | |
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| Risk [Text Block] | Index Provider Risk—There is no assurance that the Index will be determined, maintained, constructed, reconstituted, rebalanced, composed, calculated or disseminated accurately. To correct any such error, an index provider may carry out an unscheduled rebalance or other modification of the Index constituents or weightings, which may increase the Fund’s costs. Unusual market conditions may cause an index provider to postpone a scheduled rebalance. Such a postponement in a time of market volatility could mean a constituent that would otherwise be removed at rebalance may remain, causing the performance and constituents of the index to vary from those expected under normal conditions. Index providers generally do not provide any representation or warranty in relation to the quality, accuracy or completeness of data in the indexes in which they license, and generally do not guarantee that an index will be calculated in accordance with its stated methodology. Losses or costs associated with any index provider errors generally will be borne by the Fund and its shareholders.
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| Interest Rate Risks [Member] | |
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| Risk [Text Block] | Interest Rate Risk—Interest rate risk is the risk that the value of the Fund’s portfolio 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. Increases in interest rates typically lower the present value of a REIT’s future earnings stream, and may make financing property purchases and improvements more costly. REITs may be subject to a greater risk of rising interest rates due to the effect of potential government fiscal policy initiatives and resulting market reaction to those initiatives. Higher periods of inflation could also lead to government fiscal policies that raise interest rates. Because the market price of REITs may change based upon investors’ collective perceptions of future earnings, the value of the Fund will generally decline when investors anticipate or experience rising interest rates.
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| Market Risks [Member] | |
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| 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.
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| Investment Style Risk [Member] | |
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| Risk [Text Block] | Investment Style Risk—The Fund invests in the securities included in, or representative of, the Index regardless of their investment merit. The Fund does not attempt to outperform the Index or take defensive positions in declining markets or in response to changing market conditions. As a result, the Fund’s performance may be adversely affected by a general decline in the market segments relating to the Index.
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| Market Trading Risks [Member] | |
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| Risk [Text Block] | Market Trading Risks—The Fund is an exchange-traded fund (“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 the 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.
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| Real Estate Investment Risk [Member] | |
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| Risk [Text Block] | Real Estate Investment Risk—Due to the composition of the Index, the Fund concentrates its investments in real estate companies and companies related to the real estate industry. As such, the Fund is subject to risks associated with the direct ownership of real estate, and an investment in the Fund will be closely linked to the performance of the real estate markets. These risks include, among others: declines in the value of real estate; risks related to general and local economic conditions; possible lack of availability of mortgage funds or other limits to accessing the credit or capital markets; defaults by borrowers or tenants, particularly during an economic downturn; and changes in interest rates. The Fund's investments in the real estate market have many of the same risks as direct ownership of real estate. The real estate industry is highly sensitive to general and local economic conditions and developments and is characterized by intense competition and periodic overbuilding. Real estate values have been subject to substantial fluctuations and declines on a local, regional and national basis in the past and may continue to be in the future.
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| REITs Risk [Member] | |
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| Risk [Text Block] | REITs Risk—In addition to the risks associated with investing in securities of real estate companies and real estate related companies, REITs are subject to certain additional risks. REITs may be affected by changes in real estate values, rents, property taxes, zoning laws, neighborhood values and interest rates. Further, REITs are dependent upon specialized management skills and cash flows, and may have their investments in relatively few properties, or in a small geographic area or a single property type. Failure of a company to qualify as a REIT under federal tax law, or changes to federal tax law or regulations governing REITs, may have adverse consequences to the Fund. In addition, REITs have their own expenses, and the Fund will bear a proportionate share of those expenses. Many REITs utilize leverage (and some may be highly leveraged), which increases investment risk and could potentially magnify the Fund’s losses.
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| Service Provider Operational Risk [Member] | |
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| 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.
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| Small and Mid Cap Company Risk [Member] | |
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| Risk [Text Block] | Small- and Mid-Cap Company Risk—Even larger REITs may be small- to medium-sized companies in relation to the equity markets as a whole. Securities of small-cap companies involve substantial risk. Prices of small-cap securities may be subject to more abrupt or erratic movements, and to wider fluctuations and lower liquidity, than security prices of larger, more established companies or the broader market averages in general. It may be difficult to sell small-cap securities at the desired time and price. While mid-cap stocks may be slightly less volatile than small-cap stocks, they still involve similar risks.
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| Tracking Error Risk [Member] | |
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| Risk [Text Block] | Tracking Error Risk—Tracking error is the divergence of the Fund’s performance from that of the Index. Tracking error may occur because of, for example, pricing differences, transaction costs, the Fund’s holding of uninvested cash, differences in timing of the accrual of distributions, changes to the Index or the need to meet various new or existing regulatory requirements. This risk may be heightened during times of increased market volatility or other unusual market conditions. Tracking error also may result because the Fund incurs fees and expenses, but the Index does not.
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| Concentration Risk [Member] | |
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| Risk [Text Block] | Concentration Risk—The Fund’s assets will generally be concentrated in the securities of issuers in the real estate industry, and, accordingly, the Fund may be adversely affected by the performance of those securities, may be subject to increased price volatility, and may be more susceptible to adverse economic, market, political or regulatory occurrences affecting that industry.
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| Risk Lose Money [Member] | |
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| Risk [Text Block] | You could lose money by investing in the Fund. |
| 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 government agency. |
| Risk Nondiversified Status [Member] | |
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| 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.
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