| Label | Element | Value | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nuveen Securitized Credit Managed Accounts Portfolio | ||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||||
| Risk/Return [Heading] | rr_RiskReturnHeading | Nuveen Securitized Credit Managed Accounts Portfolio | ||||||||||||
| Objective [Heading] | rr_ObjectiveHeading | Investment Objective | ||||||||||||
| Objective, Primary [Text Block] | rr_ObjectivePrimaryTextBlock | The investment objective of the Portfolio is to seek a high level of current income and total return.
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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 46% of the average value of its portfolio.
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| Portfolio Turnover, Rate | rr_PortfolioTurnoverRate | 46.00% | ||||||||||||
| 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 securitized credit investments. Securitized credit investments include secured loans backed by commercial real estate, residential real estate, commercial or consumer loans, and securitizations such as agency and non-agency mortgage-backed securities (including commercial mortgage-backed securities, residential mortgage-backed securities and collateralized mortgage obligations (“CMOs”)), asset-backed securities (including collateralized debt obligations (“CDOs”) and collateralized loan obligations (“CLOs”)) and other similar securities and related instruments. Securitized credit investments are also referred to as “structured product securities” or “structured products.” A mortgage-backed security is a type of pass-through security backed by an ownership interest in a pool of mortgage loans. Agency mortgage-backed securities are guaranteed by, or secured by collateral that is guaranteed by, the U.S. government, its agencies, instrumentalities or sponsored corporations, which include the Government National Mortgage Association (“GNMA” or “Ginnie Mae”), the Federal National Mortgage Association (“FNMA” or “Fannie Mae”) and the Federal Home Loan Mortgage Corporation (“FHLMC” or “Freddie Mac”). Non-agency mortgage-backed securities are privately issued; these include commercial mortgage-backed securities. CMOs are obligations that are fully collateralized directly or indirectly by a pool of mortgages from which payments of principal and interest are dedicated to the payment of principal and interest on the CMO. Asset-backed securities are securities issued by trusts and special purpose entities that are backed by pools of assets, such as automobile loans and credit-card receivables, and which pass through the payments on the underlying obligations to the security holders (less servicing fees paid to the originator or fees for any credit enhancement). Typically, the originator of the loan or accounts receivable transfers it to a specially created trust, which repackages it as securities with a minimum denomination and a specific term. The securities are then privately placed or publicly offered. CDOs are debt obligations typically issued by a private special-purpose entity and collateralized principally by debt securities. CLOs are similar to CDOs, but are typically collateralized principally by a pool of loans, which may include, among others, senior secured loans, senior unsecured loans, and subordinate corporate loans. 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 securities of any maturity or duration. The Portfolio may invest up to 20% of its assets, in the aggregate, in corporate debt securities and U.S. government securities (including securities issued or guaranteed by U.S. government agencies and instrumentalities). The Portfolio may also use an investment strategy called “mortgage rolls” (also referred to as “dollar rolls”), in which the Portfolio sells securities for delivery in the current month and simultaneously contracts with a counterparty to repurchase similar (same type, coupon and maturity) but not identical securities on a specified future date. The Portfolio loses the right to receive principal and interest paid on the securities sold. However, the Portfolio would benefit to the extent of any price received for the securities sold and the lower forward price for the future purchase (often referred to as the “drop”) plus the interest earned on the short-term investment awaiting the settlement date of the forward purchase. If such benefits exceed the income and gain or loss due to mortgage repayments that would have been realized on the securities sold as part of the mortgage roll, the use of this technique will enhance the investment performance of the Portfolio compared with what such performance would have been without the use of mortgage rolls. Realizing benefits from the use of mortgage rolls depends upon the ability of the sub-adviser of the Portfolio to correctly predict mortgage prepayments and interest rates. The Portfolio may invest in securities that have not been registered under the Securities Act of 1933, but that may be resold to qualified institutional buyers in accordance with the provisions of Rule 144A under the Securities Act of 1933 (“Rule 144A securities”). 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 fixed-income 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 Portfolio’s performance. | ||||||||||||
| 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 Portfolio’s performance.
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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 one-year period ended December 31, 2023, the Portfolio’s highest and lowest quarterly returns were 5.34%
and -1.04%, respectively, for the quarters ended December 31, 2023 and September 30, 2023. |
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| Performance Table Heading | rr_PerformanceTableHeading | Average Annual Total Returnsfor the Periods EndedDecember 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 broad measures of market performance. In accordance with new regulatory requirements, the Portfolio has selected the Bloomberg U.S. Aggregate Bond Index, which represents a broad measure of market performance, and is generally representative of the market sectors or types of investments in which the Portfolio invests. 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 Securitized Credit 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 Securitized Credit 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 Securitized Credit 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 Securitized Credit 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 Securitized Credit 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 Securitized Credit 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 Securitized Credit 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 Securitized Credit 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 Securitized Credit Managed Accounts Portfolio | Dollar Roll Transaction Risk [Member] | ||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||||
| Risk [Text Block] | rr_RiskTextBlock | Dollar Roll Transaction Risk—The use of dollar rolls can increase the volatility of the Portfolio’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 be unable to perform in accordance with the terms of the instrument.
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| Nuveen Securitized Credit 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 Securitized Credit 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 Securitized Credit 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 Securitized Credit 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 Securitized Credit 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 Securitized Credit 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 Securitized Credit 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 Securitized Credit Managed Accounts Portfolio | Structured Products Risk [Member] | ||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||||
| Risk [Text Block] | rr_RiskTextBlock | 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 Portfolio to sell a structured product could expose the Portfolio to losses and could make structured products more difficult for the Portfolio 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. The Portfolio’s investments in structured products 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. 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.
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| Nuveen Securitized Credit 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 Securitized Credit 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 Securitized Credit 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 Securitized Credit Managed Accounts Portfolio | Common Shares | ||||||||||||||
| 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 | 0.54% | ||||||||||||
| Total Annual Portfolio Operating Expenses | rr_ExpensesOverAssets | 0.54% | ||||||||||||
| Fee Waivers and/or Expense Reimbursements | rr_FeeWaiverOrReimbursementOverAssets | (0.54%) | [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] | |||||||||||
| 2023 | rr_AnnualReturn2023 | 7.24% | [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 | 6.28% | ||||||||||||
| Highest Quarterly Return, Label | rr_HighestQuarterlyReturnLabel | highest | ||||||||||||
| Highest Quarterly Return, Date | rr_BarChartHighestQuarterlyReturnDate | Dec. 31, 2023 | ||||||||||||
| Highest Quarterly Return | rr_BarChartHighestQuarterlyReturn | 5.34% | ||||||||||||
| Lowest Quarterly Return, Label | rr_LowestQuarterlyReturnLabel | lowest | ||||||||||||
| Lowest Quarterly Return, Date | rr_BarChartLowestQuarterlyReturnDate | Sep. 30, 2023 | ||||||||||||
| Lowest Quarterly Return | rr_BarChartLowestQuarterlyReturn | (1.04%) | ||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 7.24% | ||||||||||||
| Since Inception | rr_AverageAnnualReturnSinceInception | 9.27% | ||||||||||||
| Inception Date | rr_AverageAnnualReturnInceptionDate | Nov. 01, 2022 | ||||||||||||
| Nuveen Securitized Credit Managed Accounts Portfolio | Return After Taxes on Distributions | Common Shares | ||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 4.81% | ||||||||||||
| Since Inception | rr_AverageAnnualReturnSinceInception | 6.88% | ||||||||||||
| Inception Date | rr_AverageAnnualReturnInceptionDate | Nov. 01, 2022 | ||||||||||||
| Nuveen Securitized Credit Managed Accounts Portfolio | Return After Taxes on Distributions and Sale of Shares | Common Shares | ||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 4.23% | ||||||||||||
| Since Inception | rr_AverageAnnualReturnSinceInception | 6.04% | ||||||||||||
| Inception Date | rr_AverageAnnualReturnInceptionDate | Nov. 01, 2022 | ||||||||||||
| Nuveen Securitized Credit 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 | 7.42% | [5] | |||||||||||
| Inception Date | rr_AverageAnnualReturnInceptionDate | Nov. 01, 2022 | [5] | |||||||||||
| Nuveen Securitized Credit Managed Accounts Portfolio | Bloomberg U.S. Securitized Index (reflects no deduction for fees, expenses or taxes) | ||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | |||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 5.06% | [6] | |||||||||||
| Since Inception | rr_AverageAnnualReturnSinceInception | 7.28% | [6] | |||||||||||
| Inception Date | rr_AverageAnnualReturnInceptionDate | Nov. 01, 2022 | [6] | |||||||||||
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