v3.26.1
Label Element Value
Nuveen Equity Index Fund  
Risk/Return: oef_RiskReturnAbstract  
Risk/Return [Heading] oef_RiskReturnHeading Nuveen Equity Index Fund
Objective [Heading] oef_ObjectiveHeading Investment objective
Objective, Primary [Text Block] oef_ObjectivePrimaryTextBlock

The Fund seeks a favorable long-term total return, mainly through capital appreciation, by investing primarily in a portfolio of equity securities selected to track the overall U.S. equity markets based on a market index.

Expense Heading [Optional Text] oef_ExpenseHeading Fees and expenses
Expense Narrative [Text Block] oef_ExpenseNarrativeTextBlock

The following tables describe the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, when buying or selling shares of the Fund, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund or in other Nuveen mutual funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial advisor and in “How You Can Buy and Sell Shares” on page 100 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 106 of the Fund’s Statement of Additional Information. In addition, more information about sales charge discounts and waivers for purchases of shares through specific financial intermediaries is set forth in the appendix to the Fund’s Prospectus entitled “Variations in Sales Charge Reductions and Waivers Available Through Certain Intermediaries.”
Shareholder Fees Caption [Optional Text] oef_ShareholderFeesCaption SHAREHOLDER FEES (fees paid directly from your investment)
Operating Expenses Caption [Optional Text] oef_OperatingExpensesCaption ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] oef_PortfolioTurnoverHeading Portfolio turnover
Portfolio Turnover [Text Block] oef_PortfolioTurnoverTextBlock

The Fund pays transaction costs, such as commissions, as applicable, 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 Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s performance. During the fiscal year ended October 31, 2025, the Fund’s portfolio turnover rate was 7% of the average value of its portfolio.
Portfolio Turnover, Rate oef_PortfolioTurnoverRate 7.00%
Expense Example [Heading] oef_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] oef_ExpenseExampleNarrativeTextBlock

This example is intended to help you compare the cost of investing in shares of the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all your shares at the end of those periods. The example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses, before fee waivers and/or expense reimbursements, remain the same. The example assumes that the Fund’s fee waiver and/or expense reimbursement arrangements will each remain in place for the durations noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading] oef_StrategyHeading Principal investment strategies
Strategy Narrative [Text Block] oef_StrategyNarrativeTextBlock

Under normal circumstances, the Fund invests at least 80% of its assets in equity securities of its benchmark index, the Russell 3000® Index. The Russell 3000 Index measures the performance of the largest 3,000 U.S. companies representing approximately 96% of the investable U.S. equity market. The Fund buys most, but not necessarily all, of the stocks in its benchmark index, and will attempt to closely match the overall investment characteristics of its benchmark index. For purposes of the 80% investment policy, the term “assets” means net assets, plus the amount of any borrowings for investment purposes.

The Fund is designed to track various U.S. equity markets as a whole or a segment of these markets. The Fund primarily invests its assets in equity securities its sub-adviser, Nuveen Asset Management, LLC (“Nuveen Asset Management”), has selected to track a designated stock market index. Because the return of an index is not reduced by investment and other operating expenses, the Fund’s ability to match the returns of the Russell 3000 Index is negatively affected by the costs of buying and selling securities as well as the Fund’s fees and other expenses. The use of a particular index by the Fund is not a fundamental policy and may be changed without shareholder approval. The portfolio management team of Nuveen Asset Management will attempt to build a portfolio that generally matches the market weighted investment characteristics of the Fund’s benchmark index.

The Fund is classified as a diversified investment company, as defined under the Investment Company Act of 1940, as amended (the “1940 Act”). However, the Fund may become non-diversified under the 1940 Act without the approval of Fund shareholders solely as a result of a change in relative market capitalization or index weighting of one or more constituents of its benchmark index, the Russell 3000 Index, which the Fund seeks to track.

Bar Chart and Performance Table [Heading] oef_BarChartAndPerformanceTableHeading Past performance
Performance Narrative [Text Block] oef_PerformanceNarrativeTextBlock

The following chart and table help illustrate some of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year. The bar chart shows the annual total returns of Class R6 of the Fund, before taxes, in each full calendar year for the last ten years. Because the expenses vary across share classes, the performance of Class R6 may vary from the other share classes. Below the bar chart are the best and worst returns of Class R6 for a calendar quarter during the full calendar-year periods covered by the bar chart. The performance table following the bar chart shows the Fund’s average annual total returns for Class R6, Class I, Premier Class, Retirement Class, Class A and Class W over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2025, and how those returns compare to those of the Fund’s broad-based securities market and benchmark index. For periods prior to August 1, 2026, Teachers Advisors, LLC (“Advisors”) served as investment adviser to the Fund. After-tax performance is shown only for Class R6 shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for Class R6 shares.

The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund for certain fees and expenses. Without these waivers and reimbursements, the returns of the Fund would have been lower. Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future. The broad-based securities market and benchmark index listed below is unmanaged, and you cannot invest directly in an index. The returns for the broad-based securities market and benchmark index reflect no deduction for fees, expenses or taxes.

For current performance information of each share class, including performance to the most recent month-end, please visit www.nuveen.com/performance or call 800-257-8787.
Performance Information Illustrates Variability of Returns [Text] oef_PerformanceInformationIllustratesVariabilityOfReturns The following chart and table help illustrate some of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year.
Performance Availability Website Address [Text] oef_PerformanceAvailabilityWebSiteAddress www.nuveen.com/performance
Performance Past Does Not Indicate Future [Text] oef_PerformancePastDoesNotIndicateFuture Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future.
Bar Chart [Heading] oef_BarChartHeading ANNUAL TOTAL RETURNS FOR CLASS R6 SHARES (%)Nuveen Equity Index Fund
Bar Chart Closing [Text Block] oef_BarChartClosingTextBlock

Best quarter: 21.98%, for the quarter ended June 30, 2020. Worst quarter: -20.87%, for the quarter ended March 31, 2020.
Performance Table Heading oef_PerformanceTableHeading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2025 †
Index No Deduction for Fees, Expenses, or Taxes [Text] oef_IndexNoDeductionForFeesExpensesTaxes (reflects no deductions for fees, expenses or taxes)
Performance Table Uses Highest Federal Rate oef_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the historical highest individual federal marginal income tax rates in effect during the periods shown and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred oef_PerformanceTableNotRelevantToTaxDeferred The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements such as 401(a), 401(k) or 403(b) plans or Individual Retirement Accounts (IRAs).
Performance Table One Class of after Tax Shown [Text] oef_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown for only one class, and after-tax returns for other classes will vary.
Performance Table Closing [Text Block] oef_PerformanceTableClosingTextBlock Current performance of the Fund’s shares may be higher or lower than that shown above.

After-tax returns are calculated using the historical highest individual federal marginal income tax rates in effect during the periods shown and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements such as 401(a), 401(k) or 403(b) plans or Individual Retirement Accounts (IRAs). After-tax returns are shown for only one class, and after-tax returns for other classes will vary.
Nuveen Equity Index Fund | Principal investment risks  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock

Principal investment risks

You could lose money over short or long periods by investing in this Fund. An investment in the Fund, due to the nature of the Fund’s portfolio holdings, typically is subject to the following principal investment risks:
Nuveen Equity Index Fund | Risk Lose Money [Member]  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock You could lose money over short or long periods by investing in this Fund.
Nuveen Equity Index Fund | Market Risk  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock

· Market Risk—The risk that market prices of portfolio investments held by the Fund may fluctuate rapidly or unpredictably due to a variety of factors, including responses to government actions or interventions, or changing

economic, political or market conditions. Market risk may affect a single issuer, industry or sector of the economy, or it may affect the market as a whole. Such conditions may add significantly to the risk of volatility in the net asset value (“NAV”) of the Fund’s shares and adversely affect the Fund and its investments. From time to time, the Fund may invest a significant portion of its assets in companies in one or more related sectors or industries, which would make the Fund more vulnerable to adverse developments affecting such sectors or industries. The Fund currently invests a significant portion of its assets in companies in the information technology sector, although this may change over time.
Nuveen Equity Index Fund | Index Risk  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock

· Index Risk—The risk that the Fund’s performance may not correspond to its benchmark index for any period of time and may underperform such index or the overall financial market. Additionally, to the extent that the Fund’s investments vary from the composition of its benchmark index, the Fund’s performance could potentially vary from the index’s performance to a greater extent than if the Fund merely attempted to replicate the index.
Nuveen Equity Index Fund | Issuer Risk (often called Financial Risk)  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock

· Issuer Risk (often called Financial Risk)—The risk that an issuer’s earnings prospects, credit rating and overall financial position will deteriorate, causing a decline in the value of the issuer’s financial instruments over short or extended periods of time.

Nuveen Equity Index Fund | Large-Cap Risk  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock

· Large-Cap Risk—The risk that large-capitalization companies are more mature and may grow more slowly than the economy as a whole and tend to go in and out of favor based on market and economic conditions.

Nuveen Equity Index Fund | Mid-Cap Risk  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock

· Mid-Cap Risk—The risk that the stocks of mid-capitalization companies often experience greater price volatility, lower trading volume and lower overall liquidity than the stocks of larger, more established companies.
Nuveen Equity Index Fund | Small-Cap Risk  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock

· Small-Cap Risk—The risk that the stocks of small-capitalization companies often experience greater price volatility than large- or mid-sized companies because small-cap companies are often newer or less established than larger companies and are likely to have more limited resources, products and markets. Securities of small-cap companies often have lower overall liquidity than securities of larger companies as a result of there being a smaller market for their securities, which can have an adverse effect on the pricing of these securities and on the ability to sell these securities when Nuveen Asset Management deems it appropriate.

Nuveen Equity Index Fund | Non-Diversification Risk  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock

· Non-Diversification Risk—While the Fund is considered to be a diversified investment company under the 1940 Act, the Fund may become non-diversified under the 1940 Act without Fund shareholder approval when necessary to continue to track its benchmark index. Non-diversified status means that the Fund can invest a greater percentage of its assets in the securities of a single issuer than a diversified fund. Investing in a non-diversified fund involves greater risk than investing in a diversified fund because a loss in value of a particular investment may have a greater effect

on the fund’s return since that investment may represent a larger portion of the fund’s total portfolio assets.

Nuveen Equity Index Fund | Russell 3000® Index  
Risk/Return: oef_RiskReturnAbstract  
Average Annual Return, Label [Optional Text] oef_AverageAnnualReturnLabel Russell 3000® Index
Average Annual Return, Percent oef_AvgAnnlRtrPct 17.15%
Average Annual Return, Percent oef_AvgAnnlRtrPct 13.15%
Average Annual Return, Percent oef_AvgAnnlRtrPct 14.29%
Average Annual Return, Percent oef_AvgAnnlRtrPct 13.57%
Performance Inception Date oef_PerfInceptionDate Sep. 28, 2018
Nuveen Equity Index Fund | Class A  
Risk/Return: oef_RiskReturnAbstract  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 5.75%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Shareholder Fee, Other oef_ShareholderFeeOther $ 15.00
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.04%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.07% [1]
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.36%
Fee Waiver or Reimbursement oef_FeeWaiverOrReimbursementOverAssets 0.00% [2]
Net Expenses (as a percentage of Assets) oef_NetExpensesOverAssets 0.36%
Fee Waiver or Reimbursement over Assets, Date of Termination oef_FeeWaiverOrReimbursementOverAssetsDateOfTermination February 28, 2027
Expenses Restated to Reflect Current [Text] oef_ExpensesRestatedToReflectCurrent Restated to reflect estimate for the current fiscal year.
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 610
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 684
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 765
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 1,004
Average Annual Return, Percent oef_AvgAnnlRtrPct 10.03% [3]
Average Annual Return, Percent oef_AvgAnnlRtrPct 11.48% [3]
Average Annual Return, Percent oef_AvgAnnlRtrPct 13.26% [3]
Nuveen Equity Index Fund | Class I  
Risk/Return: oef_RiskReturnAbstract  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Shareholder Fee, Other oef_ShareholderFeeOther $ 0
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.04%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.05% [1]
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.09%
Fee Waiver or Reimbursement oef_FeeWaiverOrReimbursementOverAssets 0.00% [2]
Net Expenses (as a percentage of Assets) oef_NetExpensesOverAssets 0.09%
Fee Waiver or Reimbursement over Assets, Date of Termination oef_FeeWaiverOrReimbursementOverAssetsDateOfTermination February 28, 2027
Expenses Restated to Reflect Current [Text] oef_ExpensesRestatedToReflectCurrent Restated to reflect estimate for the current fiscal year.
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 9
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 29
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 51
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 115
Average Annual Return, Percent oef_AvgAnnlRtrPct 17.04%
Average Annual Return, Percent oef_AvgAnnlRtrPct 13.01%
Average Annual Return, Percent oef_AvgAnnlRtrPct 14.14%
Nuveen Equity Index Fund | Premier Class  
Risk/Return: oef_RiskReturnAbstract  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Shareholder Fee, Other oef_ShareholderFeeOther $ 0
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.04%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.15%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.00%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.19%
Fee Waiver or Reimbursement oef_FeeWaiverOrReimbursementOverAssets 0.00% [2]
Net Expenses (as a percentage of Assets) oef_NetExpensesOverAssets 0.19%
Fee Waiver or Reimbursement over Assets, Date of Termination oef_FeeWaiverOrReimbursementOverAssetsDateOfTermination February 28, 2027
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 19
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 61
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 107
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 243
Average Annual Return, Percent oef_AvgAnnlRtrPct 16.88%
Average Annual Return, Percent oef_AvgAnnlRtrPct 12.94%
Average Annual Return, Percent oef_AvgAnnlRtrPct 14.07%
Nuveen Equity Index Fund | Class R6  
Risk/Return: oef_RiskReturnAbstract  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Shareholder Fee, Other oef_ShareholderFeeOther $ 0
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.04%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.00%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.04%
Fee Waiver or Reimbursement oef_FeeWaiverOrReimbursementOverAssets 0.00% [2]
Net Expenses (as a percentage of Assets) oef_NetExpensesOverAssets 0.04%
Fee Waiver or Reimbursement over Assets, Date of Termination oef_FeeWaiverOrReimbursementOverAssetsDateOfTermination February 28, 2027
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 4
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 13
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 23
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 51
Highest Quarterly Return, Label [Optional Text] oef_HighestQuarterlyReturnLabel Best quarter
Highest Quarterly Return, Date oef_BarChartHighestQuarterlyReturnDate Jun. 30, 2020
Highest Quarterly Return oef_BarChartHighestQuarterlyReturn 21.98%
Lowest Quarterly Return, Label [Optional Text] oef_LowestQuarterlyReturnLabel Worst quarter
Lowest Quarterly Return, Date oef_BarChartLowestQuarterlyReturnDate Mar. 31, 2020
Lowest Quarterly Return oef_BarChartLowestQuarterlyReturn (20.87%)
Average Annual Return, Percent oef_AvgAnnlRtrPct 17.07%
Average Annual Return, Percent oef_AvgAnnlRtrPct 13.11%
Average Annual Return, Percent oef_AvgAnnlRtrPct 14.25%
Annual Return [Percent] oef_AnnlRtrPct 12.76%
Annual Return [Percent] oef_AnnlRtrPct 21.09%
Annual Return [Percent] oef_AnnlRtrPct (5.22%)
Annual Return [Percent] oef_AnnlRtrPct 30.87%
Annual Return [Percent] oef_AnnlRtrPct 20.82%
Annual Return [Percent] oef_AnnlRtrPct 25.63%
Annual Return [Percent] oef_AnnlRtrPct (19.17%)
Annual Return [Percent] oef_AnnlRtrPct 25.91%
Annual Return [Percent] oef_AnnlRtrPct 23.71%
Annual Return [Percent] oef_AnnlRtrPct 17.07%
Nuveen Equity Index Fund | Class R6 | After Taxes on Distributions  
Risk/Return: oef_RiskReturnAbstract  
Average Annual Return, Percent oef_AvgAnnlRtrPct 16.10%
Average Annual Return, Percent oef_AvgAnnlRtrPct 12.52%
Average Annual Return, Percent oef_AvgAnnlRtrPct 13.64%
Nuveen Equity Index Fund | Class R6 | After Taxes on Distributions and Sales  
Risk/Return: oef_RiskReturnAbstract  
Average Annual Return, Percent oef_AvgAnnlRtrPct 10.25%
Average Annual Return, Percent oef_AvgAnnlRtrPct 10.32%
Average Annual Return, Percent oef_AvgAnnlRtrPct 11.78%
Nuveen Equity Index Fund | Retirement Class  
Risk/Return: oef_RiskReturnAbstract  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Shareholder Fee, Other oef_ShareholderFeeOther $ 0
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.04%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.25%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.29%
Fee Waiver or Reimbursement oef_FeeWaiverOrReimbursementOverAssets 0.00% [2]
Net Expenses (as a percentage of Assets) oef_NetExpensesOverAssets 0.29%
Fee Waiver or Reimbursement over Assets, Date of Termination oef_FeeWaiverOrReimbursementOverAssetsDateOfTermination February 28, 2027
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 30
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 93
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 163
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 368
Average Annual Return, Percent oef_AvgAnnlRtrPct 16.77%
Average Annual Return, Percent oef_AvgAnnlRtrPct 12.82%
Average Annual Return, Percent oef_AvgAnnlRtrPct 13.96%
Nuveen Equity Index Fund | Class W  
Risk/Return: oef_RiskReturnAbstract  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Shareholder Fee, Other oef_ShareholderFeeOther $ 0
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.04%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.00%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.04%
Fee Waiver or Reimbursement oef_FeeWaiverOrReimbursementOverAssets (0.04%) [2],[4]
Net Expenses (as a percentage of Assets) oef_NetExpensesOverAssets 0.00%
Fee Waiver or Reimbursement over Assets, Date of Termination oef_FeeWaiverOrReimbursementOverAssetsDateOfTermination February 28, 2027
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 0
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 0
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 0
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 0
Average Annual Return, Percent oef_AvgAnnlRtrPct 17.12%
Average Annual Return, Percent oef_AvgAnnlRtrPct 13.16%
Average Annual Return, Percent oef_AvgAnnlRtrPct 13.57%
Performance Inception Date oef_PerfInceptionDate Sep. 28, 2018
[1]

Restated to reflect estimate for the current fiscal year.
[2]

Under the Fund’s expense reimbursement arrangements, the Fund’s investment adviser, Nuveen Fund Advisors, LLC (“Nuveen Fund Advisors”), has contractually agreed to reimburse the Fund for any Total annual Fund operating expenses (excluding interest, taxes, brokerage commissions or other transactional expenses, Acquired fund fees and expenses and extraordinary expenses) that exceed: (i) 0.44% of average daily net assets for Class A shares; (ii) 0.24% of average daily net assets for Class I shares; (iii) 0.24% of average daily net assets for Premier Class shares; (iv) 0.09% of average daily net assets for Class R6 shares; (v) 0.34% of average daily net assets for Retirement Class shares; and (vi) 0.09% of average daily net assets for Class W shares of the Fund. These expense reimbursement arrangements will continue through at least February 28, 2027, unless changed with approval of the Board of Trustees.
[3]

The Class A average annual total returns have been restated to reflect a maximum up-front sales charge of 5.75% applicable to the purchase of Class A shares, which was effective as of May 6, 2024.
[4]

Nuveen Fund Advisors has contractually agreed to waive and/or reimburse Class W’s Management fees and Other expenses (excluding interest, taxes, brokerage commissions or other transactional expenses, Acquired fund fees and expenses, Trustee expenses and extraordinary expenses) in their entirety. Nuveen Fund Advisors expects these waiver and/or reimbursement arrangements to remain in effect indefinitely, unless changed or terminated with approval of the Board of Trustees.