| Label | Element | Value | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nuveen Core Impact Bond Managed Accounts Portfolio | ||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||
| Risk/Return [Heading] | rr_RiskReturnHeading | Nuveen Core Impact Bond Managed Accounts Portfolio | ||||||||||
| Objective [Heading] | rr_ObjectiveHeading | Investment Objective | ||||||||||
| Objective, Primary [Text Block] | rr_ObjectivePrimaryTextBlock | The investment objective of the Portfolio is to seek total return, primarily through current income, while giving special consideration to certain environmental, social and governance (“ESG”) criteria.
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| Expense [Heading] | rr_ExpenseHeading | Fees and Expenses of the Portfolio | ||||||||||
| Expense Narrative [Text Block] | rr_ExpenseNarrativeTextBlock | The following tables describe the fees and expenses that you may pay if you buy and hold shares of the Portfolio. Portfolio shares may be purchased only by or on behalf of separately managed account clients where Nuveen Asset Management, LLC has an agreement to serve as investment adviser or sub-adviser to the account with the separately managed account program sponsor or directly with the client. The fees and expenses in the following tables do not reflect any charges that are imposed by the separately managed accounts. If such charges were reflected, the fees and expenses would be higher than what is shown below.
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| Shareholder Fees Caption [Text] | rr_ShareholderFeesCaption | Shareholder Fees (fees paid directly from your investment) | ||||||||||
| Operating Expenses Caption [Text] | rr_OperatingExpensesCaption | Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) | ||||||||||
| Portfolio Turnover [Heading] | rr_PortfolioTurnoverHeading | Portfolio Turnover | ||||||||||
| Portfolio Turnover [Text Block] | rr_PortfolioTurnoverTextBlock | The Portfolio pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Portfolio shares are held in a taxable account. These costs, which are not reflected in annual portfolio operating expenses or in the example, affect the Portfolio’s performance. During the most recent fiscal year, the Portfolio’s portfolio turnover rate was 71% of the average value of its portfolio.
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| Portfolio Turnover, Rate | rr_PortfolioTurnoverRate | 71.00% | ||||||||||
| Expense Example [Heading] | rr_ExpenseExampleHeading | Example | ||||||||||
| Expense Example Narrative [Text Block] | rr_ExpenseExampleNarrativeTextBlock | The following example is intended to help you compare the cost of investing in the Portfolio with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Portfolio for the time periods indicated and then either redeem or do not redeem your shares at the end of a period. The example also assumes that your investment has a 5% return each year, that the Portfolio’s operating expenses remain the same and that the expense reimbursements continue to remain in place. The example does not reflect any charges that are imposed by the separately managed accounts. If such charges were reflected, the costs would be higher. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
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| Strategy [Heading] | rr_StrategyHeading | Principal Investment Strategies | ||||||||||
| Strategy Narrative [Text Block] | rr_StrategyNarrativeTextBlock | Under normal circumstances, the Portfolio invests at least 80% of the sum of its net assets and the amount of any borrowings for investment purposes in bonds. For these purposes bonds include fixed-income securities of all types, including but not limited to, corporate bonds, residential and commercial mortgage-backed and other asset-backed securities, U.S. government securities (securities issued or guaranteed by the U.S. government or its agencies or instrumentalities), senior loans and loan participations and assignments, and taxable and tax-exempt municipal bonds. The Portfolio may invest up to 10% of its assets in securities rated lower than investment grade or unrated securities of comparable quality as determined by the Portfolio’s sub-adviser (securities commonly referred to as “high-yield” securities or “junk” bonds). The Portfolio may invest in fixed-income securities of any maturity or duration. When selecting investments for the Portfolio, the sub-adviser considers certain ESG criteria or a proprietary impact framework (the “Impact Framework”). The Impact Framework, described below, provides direct exposure to issuers or projects that the sub-adviser believes have the potential to have social or environmental benefits. The ESG criteria are generally implemented based on data provided by independent research vendor(s). In those limited cases where independent ESG criteria are not available for certain types of securities or for certain issuers, these securities may nonetheless be eligible for investment by the Portfolio should they meet certain internal ESG criteria. All issuers not otherwise reviewed in connection with the Impact Framework described below must meet or exceed minimum ESG performance standards to be eligible for investment by the Portfolio. The ESG evaluation process employed by the sub-adviser for corporate issuers favors issuers with leadership in ESG performance relative to their peers. Typically, environmental assessment categories include climate change, natural resource use, waste management and environmental opportunities. Social evaluation categories for corporate issuers include human capital, product safety and social opportunities. Governance assessment categories for corporate issuers include corporate governance, business ethics and public policy. How well companies adhere to international norms and principles and involvement in major ESG controversies (examples of which may relate to the environment, customers, human rights & community, labor rights & supply chain, and governance) are other considerations. The ESG evaluation process with respect to corporate issuers is conducted on an industry-specific basis and involves the identification of key performance indicators, which are given more or less relative weight compared to the broader range of potential assessment categories. When ESG concerns exist, the evaluation process gives careful consideration to how companies address the risks and opportunities they face in the context of their sector or industry and relative to their peers. The Portfolio will not generally invest in companies significantly involved in certain business activities including, but not limited to, the production of alcohol, tobacco, military weapons, firearms, nuclear power, thermal coal, and gambling products and services. The ESG evaluation process with respect to government issuers favors issuers with leadership in ESG performance relative to all peers. Typically, environmental assessment categories include the issuer’s ability to protect, harness, and supplement its natural resources, and to manage environmental vulnerabilities and externalities. Social assessment categories include the issuer’s ability to develop a healthy, productive, and stable workforce and knowledge capital, and to create a supportive economic environment. Governance assessment categories include the issuer’s institutional capacity to support long-term stability and well-functioning financial, judicial, and political systems, and capacity to address environmental and social risks. The government ESG evaluation process is conducted on a global basis and reflects how an issuer’s exposure to and management of ESG risk factors may affect the long-term sustainability of its economy. While the Portfolio may invest in issuers that meet these criteria, it is not required to invest in every issuer that meets these criteria. In addition, concerns with respect to one ESG assessment category may not automatically eliminate an issuer from being considered an eligible investment. The ESG criteria and the universe of investments that the Portfolio utilizes may be changed without the approval of the Portfolio’s shareholders. The Portfolio is not restricted from investing in any securities issued or guaranteed by the U.S. government or its agencies or instrumentalities. The Portfolio considers investments in these securities to be consistent with its investment and social objectives. The Portfolio also invests in certain asset-backed securities, mortgage-backed securities and other securities that represent interests in assets such as pools of mortgage loans, automobile loans or credit card receivables. These securities are typically issued by legal entities established specifically to hold assets and to issue debt obligations backed by those assets. Asset-backed or mortgage-backed securities are normally created or “sponsored” by banks or other institutions or by certain government-sponsored enterprises such as Fannie Mae or Freddie Mac. The sub-adviser does not take into consideration whether the sponsor of an asset-backed security in which it invests meets the ESG criteria. That is because asset-backed securities represent interests in pools of loans, and not of the ongoing business enterprise of the sponsor. It is therefore possible that the Portfolio could invest in an asset-backed or mortgage-backed security sponsored by a bank or other financial institution in which the Portfolio could not invest directly. However, the investments underlying an asset-backed or mortgage-backed security will generally meet or exceed the ESG criteria or the Impact Framework described below. The sub-adviser reviews the ESG criteria used to evaluate securities held in the Portfolio and approves the ESG vendor(s) that provide the data that help inform this criteria. Consistent with its responsibilities, the sub-adviser has the right to change the ESG vendor(s) at any time and to add to the number of vendors providing the ESG data. Additionally, the Portfolio invests a significant portion of its assets in fixed-income instruments according to a proprietary Impact Framework. These investments provide direct exposure to issuers and/or individual projects that the sub-adviser, through its proprietary analysis, believes have the potential to have social or environmental benefits. Within this Impact Framework allocation, the Portfolio seeks opportunities to invest in publicly traded fixed-income securities that finance initiatives in areas including affordable housing, community and economic development, renewable energy and climate change, and natural resources. These investments will be selected based on the same financial criteria used in selecting the Portfolio’s other fixed-income investments. The portion of the Portfolio invested in accordance with this Impact Framework is not additionally subject to ESG criteria provided by a third party. The sub-adviser engages with certain issuers of investments it determines represent impact securities to communicate impact reporting preferences and encourage alignment with industry best practices regarding responsible investment. Investing on the basis of ESG criteria and according to the Impact Framework is qualitative and subjective by nature. There can be no assurance that every Portfolio investment will meet ESG criteria or the Impact Framework, or will do so at all times, or that the ESG criteria and the Impact Framework or any judgment exercised by the sub-adviser will reflect the beliefs or values of any particular investor. The Portfolio may invest up to 40% of its assets in securities of foreign issuers, including those that are located in emerging market countries. The Portfolio may invest in securities that have not been registered under the Securities Act of 1933, as amended (the “Securities Act”) (“restricted securities”), including securities sold in private placement transactions between issuers and their purchasers and securities that meet the requirements of Rule 144A under the Securities Act (“Rule 144A securities”). Rule 144A securities may be resold under certain circumstances only to qualified institutional buyers as defined by the rule. The Portfolio may purchase and sell futures, options, swaps, forwards and other derivative instruments. The sub-adviser may use these derivatives in an attempt to manage market risk, credit risk and interest rate risk, to manage the effective maturity or duration of securities in the portfolio or for speculative purposes in an effort to increase the Portfolio’s yield or to enhance returns. The use of a derivative is speculative if the sub-adviser is primarily seeking to enhance returns, rather than offset the risk of other positions. Developed exclusively for use within separately managed accounts advised or sub-advised by Nuveen Asset Management, LLC, the Portfolio is a specialized bond portfolio to be used in combination with selected individual securities to effectively model institutional-level investment strategies. The Portfolio enables certain Nuveen separately managed account investors to achieve greater diversification and return potential than might otherwise be achieved by investing in additional fixed-income classes, including those that have a lower credit quality and potentially higher yielding securities.
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| Risk [Heading] | rr_RiskHeading | Principal Risks | ||||||||||
| Bar Chart and Performance Table [Heading] | rr_BarChartAndPerformanceTableHeading | Portfolio Performance | ||||||||||
| Performance Narrative [Text Block] | rr_PerformanceNarrativeTextBlock | The following bar chart and table provide some indication of the potential risks of investing in the Portfolio. The Portfolio’s past performance (before and after taxes) is not necessarily an indication of how the Portfolio will perform in the future. The returns do not reflect any charges that are imposed by the separately managed accounts. If such charges were reflected, the returns would be lower.
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| Performance Information Illustrates Variability of Returns [Text] | rr_PerformanceInformationIllustratesVariabilityOfReturns | The bar chart below shows the variability of the Portfolio’s performance from year to year. | ||||||||||
| Performance Past Does Not Indicate Future [Text] | rr_PerformancePastDoesNotIndicateFuture | The Portfolio’s past performance (before and after taxes) is not necessarily an indication of how the Portfolio will perform in the future. | ||||||||||
| Bar Chart [Heading] | rr_BarChartHeading | Annual Total Return* | ||||||||||
| Bar Chart Narrative [Text Block] | rr_BarChartNarrativeTextBlock | The bar chart below shows the variability of the Portfolio’s performance from year to year.
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| Bar Chart Does Not Reflect Sales Loads [Text] | rr_BarChartDoesNotReflectSalesLoads | The returns do not reflect any charges that are imposed by the separately managed accounts. If such charges were reflected, the returns would be lower. | ||||||||||
| Bar Chart Closing [Text Block] | rr_BarChartClosingTextBlock | During the three-year period ended December 31, 2023, the Portfolio’s highest and lowest quarterly returns were 7.50%
and -7.18%, respectively, for the quarters ended December 31, 2023 and June 30, 2022. |
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| Performance Table Heading | rr_PerformanceTableHeading | Average Annual Total Returns for the Periods Ended December 31, 2023 | ||||||||||
| Performance Table Uses Highest Federal Rate | rr_PerformanceTableUsesHighestFederalRate | All after-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. | ||||||||||
| Performance Table Narrative | rr_PerformanceTableNarrativeTextBlock | The table below shows the variability of the Portfolio’s average annual returns and how they compare over the time periods indicated with those of a broad measure of market performance. All after-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Your own actual after-tax returns will depend on your specific tax situation and may differ from what is shown here. Performance reflects fee waivers, if any, in effect during the periods presented. If any such waivers had not been in place, returns would have been reduced.
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| Nuveen Core Impact Bond Managed Accounts Portfolio | Risk Lose Money [Member] | ||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||
| Risk [Text Block] | rr_RiskTextBlock | The value of your investment in this Portfolio will change daily. You could lose money by investing in the Portfolio. | ||||||||||
| Nuveen Core Impact Bond Managed Accounts Portfolio | Risk Not Insured Depository Institution [Member] | ||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||
| Risk [Text Block] | rr_RiskTextBlock | An investment in the Portfolio is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||
| Nuveen Core Impact Bond Managed Accounts Portfolio | Active Management Risk [Member] | ||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||
| Risk [Text Block] | rr_RiskTextBlock | Active Management Risk—The Portfolio’s sub-adviser actively manages the Portfolio’s investments. Consequently, the Portfolio is subject to the risk that the investment techniques and risk analyses employed by the Portfolio’s sub-adviser may not produce the desired results. This could cause the Portfolio to lose value or its investment results to lag relevant benchmarks or other funds with similar objectives.
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| Nuveen Core Impact Bond Managed Accounts Portfolio | Call Risk [Member] | ||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||
| Risk [Text Block] | rr_RiskTextBlock | 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 Portfolio, the Portfolio may have to reinvest in securities with lower yields or higher risk of default, which may adversely impact the Portfolio’s performance.
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| Nuveen Core Impact Bond Managed Accounts Portfolio | Credit Risks [Member] | ||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||
| Risk [Text Block] | rr_RiskTextBlock | 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.
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| Nuveen Core Impact Bond Managed Accounts Portfolio | Credit Spread Risk [Member] | ||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||
| Risk [Text Block] | rr_RiskTextBlock | 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 Portfolio’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.
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| Nuveen Core Impact Bond Managed Accounts Portfolio | Currency Risks [Member] | ||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||
| Risk [Text Block] | rr_RiskTextBlock | Currency Risk—Changes in currency exchange rates will affect the value of non-U.S. securities, interest earned from such securities, gains and losses realized on the sale of such securities, and derivative transactions tied to such securities. A strong U.S. dollar relative to these other currencies will adversely affect the value of the Portfolio’s portfolio.
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| Nuveen Core Impact Bond Managed Accounts Portfolio | Cybersecurity Risk [Member] | ||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||
| Risk [Text Block] | rr_RiskTextBlock | Cybersecurity Risk—Cybersecurity risk is the risk of an unauthorized breach and access to Portfolio assets, customer data (including private shareholder information), or proprietary information, or the risk of an incident occurring that causes the Portfolio, 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 Portfolio to suffer a data breach, data corruption or lose operational functionality. Successful cyber-attacks or other cyber-failures or events affecting the Portfolio, its service providers or the issuers of securities held by the Portfolio may adversely impact the Portfolio or its shareholders. Additionally, a cybersecurity breach could affect the issuers in which the Portfolio invests, which may cause the Portfolio’s investments to lose value.
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| Nuveen Core Impact Bond Managed Accounts Portfolio | Derivatives Risks [Member] | ||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||
| Risk [Text Block] | rr_RiskTextBlock | Derivatives Risk—The use of derivatives involves additional risks and transaction costs which could leave the Portfolio 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, and the risks associated with investing in such derivatives may be different and greater than the risks associated with directly investing in the underlying securities and other instruments, including leverage risk, market risk, counterparty risk, liquidity risk, operational risk and legal risk. 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 Portfolio 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 Portfolio to the creditworthiness of the central counterparty.
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| Nuveen Core Impact Bond Managed Accounts Portfolio | Emerging Markets Risk [Member] | ||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||
| Risk [Text Block] | rr_RiskTextBlock | Emerging Markets Risk—The risk of foreign investment often increases in countries with emerging markets or that are otherwise economically tied to emerging market countries. For example, these countries may have more unstable governments than developed countries and their economies may be based on only a few industries. Emerging market countries may also have less stringent regulation of accounting, auditing, financial reporting and recordkeeping requirements, which would affect the Portfolio’s ability to evaluate potential portfolio companies. As a result, there could be less information about issuers in emerging market countries, which could negatively affect the ability of the Portfolio’s sub-adviser to evaluate local companies or their potential impact on the Portfolio’s performance. Because their financial markets may be very small, prices of financial instruments in emerging market countries may be volatile and difficult to determine. Financial instruments of issuers in these countries may have lower overall liquidity than those of issuers in more developed countries. In addition, foreign investors such as the Portfolio are subject to a variety of special restrictions in many emerging market countries. Shareholder claims and regulatory actions that are available in the U.S. may be difficult or impossible to pursue in emerging market countries.
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| Nuveen Core Impact Bond Managed Accounts Portfolio | ESG and Impact Risk [Member] | ||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||
| Risk [Text Block] | rr_RiskTextBlock | ESG and Impact Risk—Because the Portfolio’s ESG investment criteria and/or proprietary Impact Framework will exclude securities of certain issuers for non-financial reasons (i.e., companies that do not demonstrate sustainable ESG characteristics or are involved in certain prohibited activities), the Portfolio may forgo some market opportunities available to funds that do not use the ESG investment criteria or otherwise fall within the Impact Framework, or may be required to sell a security when it might otherwise be disadvantageous to do so. This may cause the Portfolio to underperform the market as a whole or other funds that do not use an ESG investment strategy. Moreover, the Portfolio’s adherence to its ESG investment criteria when selecting securities may affect the Portfolio’s performance depending on whether such investments are in or out of favor. In addition, there is a risk that the companies identified by the Portfolio’s ESG investment criteria do not operate as expected when addressing ESG issues or exhibit positive ESG characteristics. Positive ESG characteristics are not uniformly defined and the sub-adviser’s assessment may differ from those used by other advisers or investors. Furthermore, data availability and reporting with respect to ESG criteria may not always be available or may become unreliable and the sub-adviser does not guaranty the accuracy of such data. ESG data may be incomplete or erroneous, which could cause the sub-adviser to incorrectly assess a company’s ESG characteristics. Additionally, the sub-adviser may not apply the relevant ESG criteria correctly causing it to inaccurately assess a company’s ESG characteristics. Moreover, the third-party data providers may differ in the data they provide for a given security or between industries, or may only take into account one of many ESG-related components of a company.
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| Nuveen Core Impact Bond Managed Accounts Portfolio | Foreign Investment Risk [Member] | ||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||
| Risk [Text Block] | rr_RiskTextBlock | Foreign Investment Risk—Non-U.S. issuers or U.S. issuers with significant non-U.S. operations may be subject to risks in addition to those of issuers located in or that principally operate in the United States as a result of, among other things, political, social and economic developments abroad, as well as armed conflicts and different legal, regulatory and tax environments. Foreign investments may also have lower liquidity and be more difficult to value than investments in U.S. issuers. To the extent the Portfolio invests a significant portion of its assets in the securities of companies in a single country or region, it may be more susceptible to adverse economic, market, political or regulatory events or conditions affecting that country or region. Foreign investments may also be subject to risk of loss because of more or less foreign government regulation, less public information, less stringent investor protections and less stringent accounting, corporate governance, financial reporting and disclosure standards.
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| Nuveen Core Impact Bond Managed Accounts Portfolio | High Yield Securities Risk [Member] | ||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||
| Risk [Text Block] | rr_RiskTextBlock | 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 Portfolio. 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.
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| Nuveen Core Impact Bond Managed Accounts Portfolio | Income Risk [Member] | ||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||
| Risk [Text Block] | rr_RiskTextBlock | Income Risk—The Portfolio's income could decline during periods of falling interest rates or when the Portfolio experiences defaults on debt securities it holds.
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| Nuveen Core Impact Bond Managed Accounts Portfolio | Interest Rate Risks [Member] | ||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||
| Risk [Text Block] | rr_RiskTextBlock | Interest Rate Risk—Interest rate risk is the risk that the value of the Portfolio’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 Portfolio’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 longer-duration fixed-rate securities usually change more than the values of shorter-duration fixed-rate securities. 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 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 Portfolio 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 or debt markets, making it more difficult for the Portfolio to sell fixed-rate investments. Changes in interest rates may also lead to an increase in Portfolio redemptions, which may result in higher portfolio turnover costs, thereby adversely affecting the Portfolio’s performance.
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| Nuveen Core Impact Bond Managed Accounts Portfolio | Loan Risk [Member] | ||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||
| Risk [Text Block] | rr_RiskTextBlock | Loan Risk—The lack of an active trading market for certain loans (including loan participations and assignments) may impair the ability of the Portfolio to realize full value in the event of the need to sell a loan and may make it difficult to value such loans. Portfolio transactions in loans may settle in as short as seven days but typically can take up to two or three weeks, and in some cases much longer. As a result of these extended settlement periods, the Portfolio may incur losses if it is required to sell other investments or temporarily borrow to meet its cash needs, including satisfying redemption requests. The risks associated with unsecured loans, which are not backed by a security interest in any specific collateral, are higher than those for comparable loans that are secured by specific collateral. For secured loans, there is a risk that the value of any collateral securing a loan in which the Portfolio has an interest may decline and that the collateral may not be sufficient to cover the amount owed on the loan. Interests in loans made to finance highly leveraged companies or transactions such as corporate acquisitions may be especially vulnerable to adverse changes in economic or market conditions. Loans may have restrictive covenants limiting the ability of a borrower to further encumber its assets. However, in periods of high demand by lenders like the Portfolio for loan investments, borrowers may limit these covenants and weaken a lender’s ability to access collateral securing the loan; reprice the credit risk associated with the borrower; and mitigate potential loss. The Portfolio may experience relatively greater realized or unrealized losses or delays and expenses in enforcing its rights with respect to loans with fewer restrictive covenants. Additionally, loans may not be considered “securities” and, as a result, the Portfolio may not be entitled to rely on the anti-fraud or other protections of the securities laws. Because junior loans have a lower place in an issuer’s capital structure and may be unsecured, junior loans involve a higher degree of overall risk than senior loans of the issuer. The Portfolio’s investments in floating rate loans that pay interest based on the London Interbank Offered Rate (LIBOR) may experience increased volatility and/or illiquidity during the transition away from LIBOR, which was phased out.
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| Nuveen Core Impact Bond Managed Accounts Portfolio | Market Risk [Member] | ||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||
| Risk [Text Block] | rr_RiskTextBlock | Market Risk—The market value of the Portfolio’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 Portfolio’s investments whether or not the Portfolio invests in such country or region. Events such as war, terrorism, 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, as inflation increases, the value of the Portfolio’s assets can decline.
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| Nuveen Core Impact Bond Managed Accounts Portfolio | Market Liquidity Risk [Member] | ||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||
| Risk [Text Block] | rr_RiskTextBlock | Market Liquidity Risk—Reductions in trading activity or dealer inventories of securities such as bonds and preferred securities, 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 Portfolio 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 Portfolio’s ability to buy or sell securities. As a result of this decreased liquidity, the Portfolio 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. If the Portfolio needed to sell large blocks of securities to meet shareholder redemption requests or to raise cash, those sales could further reduce the securities’ prices and hurt performance.
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| Nuveen Core Impact Bond Managed Accounts Portfolio | Mortgage and Asset Backed Securities Risk [Member] | ||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||
| Risk [Text Block] | rr_RiskTextBlock | Mortgage- and Asset-Backed Securities Risk—These 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 are subject to the risk of default on the underlying mortgage, loan or asset, particularly during periods of economic downturn.
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| Nuveen Core Impact Bond Managed Accounts Portfolio | Municipal Securities Risk [Member] | ||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||
| Risk [Text Block] | rr_RiskTextBlock | Municipal Securities Risk—The values of municipal securities held by the Portfolio may be adversely affected by local political and economic conditions and developments. Adverse conditions in an industry significant to a local economy could have a correspondingly adverse effect on the financial condition of local issuers. The amount of public information available about municipal bonds is generally less than for certain corporate equities or bonds, meaning that the investment performance of the Portfolio may be more dependent on the analytical abilities of the Portfolio’s sub-adviser than funds that invest in stock or other corporate investments.
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| Nuveen Core Impact Bond Managed Accounts Portfolio | Restricted Securities Risk [Member] | ||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||
| Risk [Text Block] | rr_RiskTextBlock | 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 Portfolio may be unable to dispose of the securities promptly or at current market value.
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| Nuveen Core Impact Bond Managed Accounts Portfolio | Sovereign Debt Risk [Member] | ||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||
| Risk [Text Block] | rr_RiskTextBlock | Sovereign Debt Risk—Sovereign debt instruments are subject to the risk that a governmental entity may delay or refuse to pay interest or repay principal on its sovereign debt. This may be due to, for example, cash flow problems, insufficient foreign currency reserves, political considerations, the relative size of the governmental entity’s debt position in relation to the economy or the failure to put in place economic reforms required by the International Monetary Fund or other multilateral agencies.
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| Nuveen Core Impact Bond Managed Accounts Portfolio | Unrated Security Risk [Member] | ||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||
| Risk [Text Block] | rr_RiskTextBlock | Unrated Security Risk—Unrated securities determined by the Portfolio’s sub-adviser to be of comparable quality to rated securities which the Portfolio 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.
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| Nuveen Core Impact Bond Managed Accounts Portfolio | U S Government Securities Risk [Member] | ||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||
| Risk [Text Block] | rr_RiskTextBlock | 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 or may be subject to certain limitations. 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, which may increase the risk of loss to the Portfolio.
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| Nuveen Core Impact Bond Managed Accounts Portfolio | Valuation Risk [Member] | ||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||
| Risk [Text Block] | rr_RiskTextBlock | Valuation Risk—The sales price the Portfolio could receive for any particular debt security may differ from the Portfolio’s valuation of the investment, particularly for debt securities that trade in thin or volatile markets or that are valued using a fair value methodology. The debt securities in which the Portfolio 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 Portfolio 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 Portfolio. 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 Portfolio, 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 Portfolio were to change pricing services, or if the Portfolio’s pricing service were to change its valuation methodology, there could be a material impact, either positive or negative, on the Portfolio’s net asset value.
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| Nuveen Core Impact Bond Managed Accounts Portfolio | Nuveen Core Impact Bond Managed Accounts Portfolio | ||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||
| Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) | rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice | none | ||||||||||
| Maximum Deferred Sales Charge (Load) (as a percentage of net asset value) | rr_MaximumDeferredSalesChargeOverOther | none | ||||||||||
| Maximum Sales Charge (Load) Imposed on Reinvested Dividends | rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther | none | ||||||||||
| Exchange Fee | rr_ExchangeFeeOverRedemption | none | ||||||||||
| Management Fees | rr_ManagementFeesOverAssets | none | [1] | |||||||||
| Other Expenses | rr_OtherExpensesOverAssets | 1.41% | ||||||||||
| Total Annual Portfolio Operating Expenses | rr_ExpensesOverAssets | 1.41% | ||||||||||
| Fee Waivers and/or Expense Reimbursements | rr_FeeWaiverOrReimbursementOverAssets | (1.41%) | [2] | |||||||||
| Total Annual Portfolio Operating Expenses After Fee Waivers and/or Expense Reimbursements | rr_NetExpensesOverAssets | none | ||||||||||
| 1 Year | rr_ExpenseExampleYear01 | none | [1],[3] | |||||||||
| 3 Years | rr_ExpenseExampleYear03 | none | [1],[3] | |||||||||
| 5 Years | rr_ExpenseExampleYear05 | none | [1],[3] | |||||||||
| 10 Years | rr_ExpenseExampleYear10 | none | [1],[3] | |||||||||
| 1 Year | rr_ExpenseExampleNoRedemptionYear01 | none | [1],[3] | |||||||||
| 3 Years | rr_ExpenseExampleNoRedemptionYear03 | none | [1],[3] | |||||||||
| 5 Years | rr_ExpenseExampleNoRedemptionYear05 | none | [1],[3] | |||||||||
| 10 Years | rr_ExpenseExampleNoRedemptionYear10 | none | [1],[3] | |||||||||
| 2021 | rr_AnnualReturn2021 | (0.81%) | [4] | |||||||||
| 2022 | rr_AnnualReturn2022 | (17.54%) | [4] | |||||||||
| 2023 | rr_AnnualReturn2023 | 6.31% | [4] | |||||||||
| Year to Date Return, Label | rr_YearToDateReturnLabel | Year-to-date total return | ||||||||||
| Bar Chart, Year to Date Return, Date | rr_BarChartYearToDateReturnDate | Sep. 30, 2024 | ||||||||||
| Bar Chart, Year to Date Return | rr_BarChartYearToDateReturn | 5.89% | ||||||||||
| Highest Quarterly Return, Label | rr_HighestQuarterlyReturnLabel | highest | ||||||||||
| Highest Quarterly Return, Date | rr_BarChartHighestQuarterlyReturnDate | Dec. 31, 2023 | ||||||||||
| Highest Quarterly Return | rr_BarChartHighestQuarterlyReturn | 7.50% | ||||||||||
| Lowest Quarterly Return, Label | rr_LowestQuarterlyReturnLabel | lowest | ||||||||||
| Lowest Quarterly Return, Date | rr_BarChartLowestQuarterlyReturnDate | Jun. 30, 2022 | ||||||||||
| Lowest Quarterly Return | rr_BarChartLowestQuarterlyReturn | (7.18%) | ||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 6.31% | ||||||||||
| Since Inception | rr_AverageAnnualReturnSinceInception | (3.39%) | ||||||||||
| Inception Date | rr_AverageAnnualReturnInceptionDate | Jul. 09, 2020 | ||||||||||
| Nuveen Core Impact Bond Managed Accounts Portfolio | Return After Taxes on Distributions | Nuveen Core Impact Bond Managed Accounts Portfolio | ||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 4.35% | ||||||||||
| Since Inception | rr_AverageAnnualReturnSinceInception | (4.72%) | ||||||||||
| Inception Date | rr_AverageAnnualReturnInceptionDate | Jul. 09, 2020 | ||||||||||
| Nuveen Core Impact Bond Managed Accounts Portfolio | Return After Taxes on Distributions and Sale of Shares | Nuveen Core Impact Bond Managed Accounts Portfolio | ||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 3.70% | ||||||||||
| Since Inception | rr_AverageAnnualReturnSinceInception | (3.08%) | ||||||||||
| Inception Date | rr_AverageAnnualReturnInceptionDate | Jul. 09, 2020 | ||||||||||
| Nuveen Core Impact Bond Managed Accounts Portfolio | Bloomberg U.S. Aggregate Bond Index (reflects no deduction for fees, expenses or taxes) | ||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 5.53% | [5] | |||||||||
| Since Inception | rr_AverageAnnualReturnSinceInception | (2.69%) | [5] | |||||||||
| Inception Date | rr_AverageAnnualReturnInceptionDate | Jul. 09, 2020 | [5] | |||||||||
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