v3.26.1
Performance Management
Oct. 31, 2025
Nuveen Equity Index Fund  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Past performance
Performance Narrative [Text Block]

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 Past Does Not Indicate Future [Text] Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future.
Performance Information Illustrates Variability of Returns [Text] 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.
Bar Chart [Heading] ANNUAL TOTAL RETURNS FOR CLASS R6 SHARES (%)Nuveen Equity Index Fund
Bar Chart Closing [Text Block]

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 AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2025 †
Performance Table Uses Highest Federal Rate 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 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]
Average Annual Total Returns - Nuveen Equity Index Fund
 12 Months Ended 60 Months Ended 87 Months Ended 120 Months Ended
Oct. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index        
Russell 3000® Index | Average Annual Return, Percent   17.15% 13.15% 13.57% 14.29%
Russell 3000® Index | Performance Inception Date       Sep. 28, 2018  
Class A | Average Annual Return, Percent [1]   10.03% 11.48%   13.26%
Class I | Average Annual Return, Percent   17.04% 13.01%   14.14%
Premier Class | Average Annual Return, Percent   16.88% 12.94%   14.07%
Class R6 | Average Annual Return, Percent   17.07% 13.11%   14.25%
Class R6 | After Taxes on Distributions | Average Annual Return, Percent   16.10% 12.52%   13.64%
Class R6 | After Taxes on Distributions and Sales | Average Annual Return, Percent   10.25% 10.32%   11.78%
Retirement Class | Average Annual Return, Percent   16.77% 12.82%   13.96%
Class W | Average Annual Return, Percent   17.12% 13.16% 13.57%  
Class W | Performance Inception Date       Sep. 28, 2018  
[1]

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.
Performance Table One Class of after Tax Shown [Text] After-tax returns are shown for only one class, and after-tax returns for other classes will vary.
Index No Deduction for Fees, Expenses, or Taxes [Text] (reflects no deductions for fees, expenses or taxes)
Performance Table Closing [Text Block] 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.
Performance Availability Website Address [Text] www.nuveen.com/performance
Nuveen Equity Index Fund | Class R6  
Prospectus [Line Items]  
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 21.98%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (20.87%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen Large Cap Growth Index Fund  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Past performance
Performance Narrative [Text Block]

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 and the Retirement Class 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 index and benchmark index. For periods prior to August 1, 2026, Teachers Advisors, LLC (“Advisors”) served as investment adviser to the Fund. Performance information is not included for Class W as it is not currently operational. 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 index and benchmark index listed below are unmanaged, and you cannot invest directly in an index. The returns for the broad-based securities market index 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 Past Does Not Indicate Future [Text] Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future.
Performance Information Illustrates Variability of Returns [Text] 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.
Bar Chart [Heading] ANNUAL TOTAL RETURNS FOR CLASS R6 SHARES (%)Nuveen Large Cap Growth Index Fund
Bar Chart Closing [Text Block]

Best quarter: 27.79%, for the quarter ended June 30, 2020. Worst quarter: -20.95%, for the quarter ended June 30, 2022.
Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2025 †
Performance Table Uses Highest Federal Rate 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 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]
Average Annual Total Returns - Nuveen Large Cap Growth Index Fund
 12 Months Ended 60 Months Ended 120 Months Ended
Oct. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Russell 1000® Index | Average Annual Return, Label [Optional Text] Russell 1000® Index      
Russell 1000® Index | Average Annual Return, Percent   17.37% 13.59% 14.59%
Russell 1000® Growth Index | Average Annual Return, Label [Optional Text] Russell 1000® Growth Index      
Russell 1000® Growth Index | Average Annual Return, Percent   18.56% 15.32% 18.13%
Class I | Average Annual Return, Percent   18.43% 15.14% 17.94%
Class R6 | Average Annual Return, Percent   18.50% 15.26% 18.06%
Class R6 | After Taxes on Distributions | Average Annual Return, Percent   17.10% 13.60% 16.88%
Class R6 | After Taxes on Distributions and Sales | Average Annual Return, Percent   11.60% 11.71% 15.01%
Retirement Class | Average Annual Return, Percent   18.21% 14.98% 17.77%
Performance Table One Class of after Tax Shown [Text] After-tax returns are shown for only one class, and after-tax returns for other classes will vary.
Index No Deduction for Fees, Expenses, or Taxes [Text] (reflects no deductions for fees, expenses or taxes)
Performance Table Closing [Text Block] Current performance of the Fund’s shares may be higher or lower than that shown above. After-tax returns are shown for only one class, and after-tax returns for other classes will vary.
Performance Availability Website Address [Text] www.nuveen.com/performance
Nuveen Large Cap Growth Index Fund | Class R6  
Prospectus [Line Items]  
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 27.79%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (20.95%)
Lowest Quarterly Return, Date Jun. 30, 2022
Nuveen Large Cap Value Index Fund  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Past performance
Performance Narrative [Text Block]

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 and the Retirement Class 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 index and benchmark index. For periods prior to August 1, 2026, Teachers Advisors, LLC (“Advisors”) served as investment adviser to the Fund. Performance information is not included for Class W as it is not currently operational. 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 index and benchmark index listed below are unmanaged, and you cannot invest directly in an index. The returns for the broad-based securities market index 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 Past Does Not Indicate Future [Text] Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future.
Performance Information Illustrates Variability of Returns [Text] 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.
Bar Chart [Heading] ANNUAL TOTAL RETURNS FOR CLASS R6 SHARES (%)Nuveen Large Cap Value Index Fund
Bar Chart Closing [Text Block]

Best quarter: 16.25%, for the quarter ended December 31, 2020. Worst quarter: -26.61%, for the quarter ended March 31, 2020.
Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2025 †
Performance Table Uses Highest Federal Rate 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 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]
Average Annual Total Returns - Nuveen Large Cap Value Index Fund
 12 Months Ended 60 Months Ended 120 Months Ended
Oct. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Russell 1000® Index | Average Annual Return, Label [Optional Text] Russell 1000® Index      
Russell 1000® Index | Average Annual Return, Percent   17.37% 13.59% 14.59%
Russell 1000® Value Index | Average Annual Return, Label [Optional Text] Russell 1000® Value Index      
Russell 1000® Value Index | Average Annual Return, Percent   15.91% 11.33% 10.53%
Class I | Average Annual Return, Percent   15.75% 11.15% 10.36%
Class R6 | Average Annual Return, Percent   15.84% 11.27% 10.48%
Class R6 | After Taxes on Distributions | Average Annual Return, Percent   13.83% 9.88% 9.21%
Class R6 | After Taxes on Distributions and Sales | Average Annual Return, Percent   10.02% 8.55% 8.20%
Retirement Class | Average Annual Return, Percent   15.55% 11.00% 10.21%
Performance Table One Class of after Tax Shown [Text] After-tax returns are shown for only one class, and after-tax returns for other classes will vary.
Index No Deduction for Fees, Expenses, or Taxes [Text] (reflects no deductions for fees, expenses or taxes)
Performance Table Closing [Text Block] 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.
Performance Availability Website Address [Text] www.nuveen.com/performance
Nuveen Large Cap Value Index Fund | Class R6  
Prospectus [Line Items]  
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 16.25%
Highest Quarterly Return, Date Dec. 31, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (26.61%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen S&P 500 Index Fund  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Past performance
Performance Narrative [Text Block]

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 and the Retirement Class 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. Performance information is not included for Class W as it is not currently operational. 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 Past Does Not Indicate Future [Text] Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future.
Performance Information Illustrates Variability of Returns [Text] 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.
Bar Chart [Heading] ANNUAL TOTAL RETURNS FOR CLASS R6 SHARES (%)Nuveen S&P 500 Index Fund
Bar Chart Closing [Text Block]

Best quarter: 20.53%, for the quarter ended June 30, 2020. Worst quarter: -19.59%, for the quarter ended March 31, 2020.
Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2025 †
Performance Table Uses Highest Federal Rate 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 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]
Average Annual Total Returns - Nuveen S&P 500 Index Fund
 12 Months Ended 60 Months Ended 120 Months Ended
Oct. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
S&P 500® Index | Average Annual Return, Label [Optional Text] S&P 500® Index      
S&P 500® Index | Average Annual Return, Percent   17.88% 14.42% 14.82%
Class I | Average Annual Return, Percent   17.64% 14.22% 14.62%
Class R6 | Average Annual Return, Percent   17.82% 14.37% 14.76%
Class R6 | After Taxes on Distributions | Average Annual Return, Percent   16.91% 13.82% 14.18%
Class R6 | After Taxes on Distributions and Sales | Average Annual Return, Percent   10.75% 11.41% 12.27%
Retirement Class | Average Annual Return, Percent   17.53% 14.08% 14.47%
Performance Table One Class of after Tax Shown [Text] After-tax returns are shown for only one class, and after-tax returns for other classes will vary.
Index No Deduction for Fees, Expenses, or Taxes [Text] (reflects no deductions for fees, expenses or taxes)
Performance Table Closing [Text Block] Current performance of the Fund’s shares may be higher or lower than that shown above. After-tax returns are shown for only one class, and after-tax returns for other classes will vary.
Performance Availability Website Address [Text] www.nuveen.com/performance
Nuveen S&P 500 Index Fund | Class R6  
Prospectus [Line Items]  
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 20.53%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (19.59%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen Small Cap Blend Index Fund  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Past performance
Performance Narrative [Text Block]

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 and the Retirement Class 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 index and benchmark index. For periods prior to August 1, 2026, Teachers Advisors, LLC (“Advisors”) served as investment adviser to the Fund. Performance information is not included for Class W as it is not currently operational. 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 index and benchmark index listed below are unmanaged, and you cannot invest directly in an index. The returns for the broad-based securities market index 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 Past Does Not Indicate Future [Text] Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future.
Performance Information Illustrates Variability of Returns [Text] 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.
Bar Chart [Heading] ANNUAL TOTAL RETURNS FOR CLASS R6 SHARES (%)Nuveen Small Cap Blend Index Fund
Bar Chart Closing [Text Block]

Best quarter: 31.32%, for the quarter ended December 31, 2020. Worst quarter: -30.55%, for the quarter ended March 31, 2020.
Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2025 †
Performance Table Uses Highest Federal Rate 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 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]
Average Annual Total Returns - Nuveen Small Cap Blend Index Fund
 12 Months Ended 60 Months Ended 120 Months Ended
Oct. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index      
Russell 3000® Index | Average Annual Return, Percent   17.15% 13.15% 14.29%
Russell 2000® Index | Average Annual Return, Label [Optional Text] Russell 2000® Index      
Russell 2000® Index | Average Annual Return, Percent   12.81% 6.09% 9.62%
Class I | Average Annual Return, Percent   12.78% 6.02% 9.60%
Class R6 | Average Annual Return, Percent   12.79% 6.17% 9.74%
Class R6 | After Taxes on Distributions | Average Annual Return, Percent   11.48% 4.80% 8.29%
Class R6 | After Taxes on Distributions and Sales | Average Annual Return, Percent   8.07% 4.52% 7.54%
Retirement Class | Average Annual Return, Percent   12.50% 5.88% 9.46%
Performance Table One Class of after Tax Shown [Text] After-tax returns are shown for only one class, and after-tax returns for other classes will vary.
Index No Deduction for Fees, Expenses, or Taxes [Text] (reflects no deductions for fees, expenses or taxes)
Performance Table Closing [Text Block] 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.
Performance Availability Website Address [Text] www.nuveen.com/performance
Nuveen Small Cap Blend Index Fund | Class R6  
Prospectus [Line Items]  
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 31.32%
Highest Quarterly Return, Date Dec. 31, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (30.55%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen Emerging Markets Equity Index Fund  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Past performance
Performance Narrative [Text Block]

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 Past Does Not Indicate Future [Text] Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future.
Performance Information Illustrates Variability of Returns [Text] 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.
Bar Chart [Heading] ANNUAL TOTAL RETURNS FOR CLASS R6 SHARES (%)Nuveen Emerging Markets Equity Index Fund
Bar Chart Closing [Text Block]

Best quarter: 19.18%, for the quarter ended June 30, 2020. Worst quarter: -24.02%, for the quarter ended March 31, 2020.
Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2025 †
Performance Table Uses Highest Federal Rate 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 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]
Average Annual Total Returns - Nuveen Emerging Markets Equity Index Fund
 12 Months Ended 60 Months Ended 87 Months Ended 120 Months Ended
Oct. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
MSCI Emerging Markets Index | Average Annual Return, Label [Optional Text] MSCI Emerging Markets Index        
MSCI Emerging Markets Index | Average Annual Return, Percent   33.57% 4.20% 6.62% 8.42%
MSCI Emerging Markets Index | Performance Inception Date       Sep. 28, 2018  
Class A | Average Annual Return, Percent [1]   25.93% 2.30%   7.18%
Class I | Average Annual Return, Percent   33.99% 3.72%   8.07%
Premier Class | Average Annual Return, Percent   33.95% 3.71%   8.04%
Class R6 | Average Annual Return, Percent   34.13% 3.87%   8.20%
Class R6 | After Taxes on Distributions | Average Annual Return, Percent   32.59% 3.05%   7.49%
Class R6 | After Taxes on Distributions and Sales | Average Annual Return, Percent   20.18% 2.72%   6.46%
Retirement Class | Average Annual Return, Percent   33.82% 3.61%   7.94%
Class W | Average Annual Return, Percent   34.34% 4.05% 6.54%  
Class W | Performance Inception Date       Sep. 28, 2018  
[1]

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.
Performance Table One Class of after Tax Shown [Text] After-tax returns are shown for only one class, and after-tax returns for other classes will vary.
Performance Table Closing [Text Block] 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.
Performance Availability Website Address [Text] www.nuveen.com/performance
Nuveen Emerging Markets Equity Index Fund | Class R6  
Prospectus [Line Items]  
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 19.18%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (24.02%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen International Equity Index Fund  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Past performance
Performance Narrative [Text Block]

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 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 Past Does Not Indicate Future [Text] Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future.
Performance Information Illustrates Variability of Returns [Text] 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.
Bar Chart [Heading] ANNUAL TOTAL RETURNS FOR CLASS R6 SHARES (%)Nuveen International Equity Index Fund
Bar Chart Closing [Text Block]

Best quarter: 18.12%, for the quarter ended December 31, 2022. Worst quarter: -23.01%, for the quarter ended March 31, 2020.
Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2025 †
Performance Table Uses Highest Federal Rate 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 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]
Average Annual Total Returns - Nuveen International Equity Index Fund
 12 Months Ended 60 Months Ended 87 Months Ended 120 Months Ended
Oct. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
MSCI EAFE® Index | Average Annual Return, Label [Optional Text] MSCI EAFE® Index        
MSCI EAFE® Index | Average Annual Return, Percent   31.22% 8.92% 8.14% 8.18%
MSCI EAFE® Index | Performance Inception Date       Sep. 28, 2018  
Class I | Average Annual Return, Percent   31.42% 8.90%   8.24%
Premier Class | Average Annual Return, Percent   31.45% 8.86%   8.20%
Class R6 | Average Annual Return, Percent   31.58% 9.02%   8.36%
Class R6 | After Taxes on Distributions | Average Annual Return, Percent   29.55% 8.09%   7.54%
Class R6 | After Taxes on Distributions and Sales | Average Annual Return, Percent   18.68% 6.86%   6.57%
Retirement Class | Average Annual Return, Percent   31.27% 8.75%   8.09%
Class W | Average Annual Return, Percent   31.63% 9.08% 8.32%  
Class W | Performance Inception Date       Sep. 28, 2018  
Performance Table One Class of after Tax Shown [Text] After-tax returns are shown for only one class, and after-tax returns for other classes will vary.
Performance Table Closing [Text Block] 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.
Performance Availability Website Address [Text] www.nuveen.com/performance
Nuveen International Equity Index Fund | Class R6  
Prospectus [Line Items]  
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 18.12%
Highest Quarterly Return, Date Dec. 31, 2022
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (23.01%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen Emerging Markets Equity Fund  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Past performance
Performance Narrative [Text Block]

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, reimburse and/or compensate the Fund for certain fees, expenses and/or costs. Without these reductions and/or compensation, 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 Past Does Not Indicate Future [Text] Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future.
Performance Information Illustrates Variability of Returns [Text] 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.
Bar Chart [Heading] ANNUAL TOTAL RETURNS FOR CLASS R6 SHARES (%)Nuveen Emerging Markets Equity Fund
Bar Chart Closing [Text Block]

Best quarter: 23.74%, for the quarter ended June 30, 2020. Worst quarter: -28.45%, for the quarter ended March 31, 2020.
Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2025 †
Performance Table Uses Highest Federal Rate 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 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]
Average Annual Total Returns - Nuveen Emerging Markets Equity Fund
 12 Months Ended 60 Months Ended 87 Months Ended 120 Months Ended
Oct. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
MSCI Emerging Markets Index | Average Annual Return, Label [Optional Text] MSCI Emerging Markets Index        
MSCI Emerging Markets Index | Average Annual Return, Percent   33.57% 4.20% 6.62% 8.42%
MSCI Emerging Markets Index | Performance Inception Date       Sep. 28, 2018  
Class A | Average Annual Return, Percent [1]   27.77% (0.94%)   6.04%
Class I | Average Annual Return, Percent   35.85% 0.53%   6.99%
Premier Class | Average Annual Return, Percent   35.80% 0.51%   6.93%
Class R6 | Average Annual Return, Percent   36.05% 0.61%   7.06%
Class R6 | After Taxes on Distributions | Average Annual Return, Percent   34.15% (1.28%)   5.64%
Class R6 | After Taxes on Distributions and Sales | Average Annual Return, Percent   21.31% (0.19%)   5.35%
Retirement Class | Average Annual Return, Percent   35.75% 0.45%   6.88%
Class W | Average Annual Return, Percent   37.32% 1.52% 6.68%  
Class W | Performance Inception Date       Sep. 28, 2018  
[1]

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.
Performance Table One Class of after Tax Shown [Text] After-tax returns are shown for only one class, and after-tax returns for other classes will vary.
Performance Table Closing [Text Block] 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.
Performance Availability Website Address [Text] www.nuveen.com/performance
Nuveen Emerging Markets Equity Fund | Class R6  
Prospectus [Line Items]  
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 23.74%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (28.45%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen International Equity Fund  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Past performance
Performance Narrative [Text Block]

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, reimburse and/or compensate the Fund for certain fees, expenses and/or costs. Without these reductions and/or compensation, 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 Past Does Not Indicate Future [Text] Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future.
Performance Information Illustrates Variability of Returns [Text] 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.
Bar Chart [Heading] ANNUAL TOTAL RETURNS FOR CLASS R6 SHARES (%)Nuveen International Equity Fund
Bar Chart Closing [Text Block]

Best quarter: 21.00%, for the quarter ended June 30, 2020. Worst quarter: -24.85%, for the quarter ended March 31, 2020.
Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2025 †
Performance Table Uses Highest Federal Rate 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 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]
Average Annual Total Returns - Nuveen International Equity Fund
 12 Months Ended 60 Months Ended 87 Months Ended 120 Months Ended
Oct. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
MSCI EAFE® Index | Average Annual Return, Label [Optional Text] MSCI EAFE® Index        
MSCI EAFE® Index | Average Annual Return, Percent   31.22% 8.92% 8.14% 8.18%
MSCI EAFE® Index | Performance Inception Date       Sep. 28, 2018  
Class A | Average Annual Return, Percent [1]   25.34% 6.62%   7.04%
Class I | Average Annual Return, Percent   33.26% 8.13%   7.92%
Premier Class | Average Annual Return, Percent   33.06% 8.07%   7.87%
Class R6 | Average Annual Return, Percent   33.33% 8.23%   8.03%
Class R6 | After Taxes on Distributions | Average Annual Return, Percent   29.30% 7.18%   7.22%
Class R6 | After Taxes on Distributions and Sales | Average Annual Return, Percent   21.43% 6.37%   6.42%
Retirement Class | Average Annual Return, Percent   32.99% 7.96%   7.76%
Class W | Average Annual Return, Percent   33.93% 8.72% 8.52%  
Class W | Performance Inception Date       Sep. 28, 2018  
[1]

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.
Performance Table One Class of after Tax Shown [Text] After-tax returns are shown for only one class, and after-tax returns for other classes will vary.
Performance Table Closing [Text Block] 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.
Performance Availability Website Address [Text] www.nuveen.com/performance
Nuveen International Equity Fund | Class R6  
Prospectus [Line Items]  
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 21.00%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (24.85%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen International Opportunities Fund  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Past performance
Performance Narrative [Text Block]

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 index 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, reimburse and/or compensate the Fund for certain fees, expenses and/or costs. Without these reductions and/or compensation, 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 index and benchmark index listed below are unmanaged, and you cannot invest directly in an index. The returns for the broad-based securities market index 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 Past Does Not Indicate Future [Text] Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future.
Performance Information Illustrates Variability of Returns [Text] 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.
Bar Chart [Heading] ANNUAL TOTAL RETURNS FOR CLASS R6 SHARES (%)Nuveen International Opportunities Fund
Bar Chart Closing [Text Block]

Best quarter: 33.30%, for the quarter ended June 30, 2020. Worst quarter: -22.53%, for the quarter ended March 31, 2020.
Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2025 †
Performance Table Uses Highest Federal Rate 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 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]
Average Annual Total Returns - Nuveen International Opportunities Fund
 12 Months Ended 60 Months Ended 87 Months Ended 120 Months Ended
Oct. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
MSCI ACWI ex USA | Average Annual Return, Label [Optional Text] MSCI ACWI ex USA        
MSCI ACWI ex USA | Average Annual Return, Percent   32.39% 7.91% 7.94% 8.41%
MSCI ACWI ex USA | Performance Inception Date       Sep. 28, 2018  
MSCI ACWI ex USA Growth | Average Annual Return, Label [Optional Text] MSCI ACWI ex USA Growth        
MSCI ACWI ex USA Growth | Average Annual Return, Percent   25.65% 4.01% 7.26% 7.92%
MSCI ACWI ex USA Growth | Performance Inception Date       Sep. 28, 2018  
Class A | Average Annual Return, Percent [1]   13.00% 0.21%   6.62%
Class I | Average Annual Return, Percent   20.34% 1.70%   7.60%
Premier Class | Average Annual Return, Percent   20.24% 1.65%   7.54%
Class R6 | Average Annual Return, Percent   20.39% 1.78%   7.68%
Class R6 | After Taxes on Distributions | Average Annual Return, Percent   18.15% 0.87%   7.05%
Class R6 | After Taxes on Distributions and Sales | Average Annual Return, Percent   12.94% 1.27%   6.19%
Retirement Class | Average Annual Return, Percent   20.09% 1.59%   7.48%
Class W | Average Annual Return, Percent   21.13% 2.39% 6.81%  
Class W | Performance Inception Date       Sep. 28, 2018  
[1]

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.
Performance Table One Class of after Tax Shown [Text] After-tax returns are shown for only one class, and after-tax returns for other classes will vary.
Performance Table Closing [Text Block] 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.
Performance Availability Website Address [Text] www.nuveen.com/performance
Nuveen International Opportunities Fund | Class R6  
Prospectus [Line Items]  
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 33.30%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (22.53%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen Quant International Small Cap Equity Fund  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Past performance
Performance Narrative [Text Block]

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 since inception of Class R6. 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 index 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 index and benchmark index listed below are unmanaged, and you cannot invest directly in an index. The returns for the broad-based securities market index 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 Past Does Not Indicate Future [Text] Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future.
Performance Information Illustrates Variability of Returns [Text] 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.
Bar Chart [Heading] ANNUAL TOTAL RETURNS FOR CLASS R6 SHARES (%)Nuveen Quant International Small Cap Equity Fund
Bar Chart Closing [Text Block]

Best quarter: 23.57%, for the quarter ended June 30, 2020. Worst quarter: -32.23%, for the quarter ended March 31, 2020.
Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2025 †
Performance Table Uses Highest Federal Rate 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 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]
Average Annual Total Returns - Nuveen Quant International Small Cap Equity Fund
 12 Months Ended 60 Months Ended 87 Months Ended 109 Months Ended
Oct. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
MSCI ACWI ex USA | Average Annual Return, Label [Optional Text] MSCI ACWI ex USA        
MSCI ACWI ex USA | Average Annual Return, Percent   32.39% 7.91%   8.78%
MSCI ACWI ex USA | Performance Inception Date         Dec. 09, 2016
MSCI ACWI ex USA | Average Annual Return, Percent       7.94%  
MSCI ACWI ex USA | Performance Inception Date       Sep. 28, 2018  
MSCI ACWI ex USA Small Cap Index | Average Annual Return, Label [Optional Text] MSCI ACWI ex USA Small Cap Index        
MSCI ACWI ex USA Small Cap Index | Average Annual Return, Percent   29.26% 6.91%   8.62%
MSCI ACWI ex USA Small Cap Index | Performance Inception Date         Dec. 09, 2016
MSCI ACWI ex USA Small Cap Index | Average Annual Return, Percent       7.33%  
MSCI ACWI ex USA Small Cap Index | Performance Inception Date       Sep. 28, 2018  
Class A | Average Annual Return, Percent [1]   27.53% 7.03%   6.78%
Class A | Performance Inception Date         Dec. 09, 2016
Class I | Average Annual Return, Percent   35.65% 8.68%   7.85%
Class I | Performance Inception Date         Dec. 09, 2016
Premier Class | Average Annual Return, Percent   35.45% 8.52%   7.74%
Premier Class | Performance Inception Date         Dec. 09, 2016
Class R6 | Average Annual Return, Percent   35.66% 8.72%   7.91%
Class R6 | Performance Inception Date         Dec. 09, 2016
Class R6 | After Taxes on Distributions | Average Annual Return, Percent   32.04% 7.34%   6.57%
Class R6 | After Taxes on Distributions | Performance Inception Date         Dec. 09, 2016
Class R6 | After Taxes on Distributions and Sales | Average Annual Return, Percent   21.86% 6.51%   5.95%
Class R6 | After Taxes on Distributions and Sales | Performance Inception Date         Dec. 09, 2016
Retirement Class | Average Annual Return, Percent   35.38% 8.47%   7.67%
Retirement Class | Performance Inception Date         Dec. 09, 2016
Class W | Average Annual Return, Percent   36.75% 9.52% 7.84%  
Class W | Performance Inception Date       Sep. 28, 2018  
[1]

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.
Performance Table One Class of after Tax Shown [Text] After-tax returns are shown for only one class, and after-tax returns for other classes will vary.
Performance Table Closing [Text Block] 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.
Performance Availability Website Address [Text] www.nuveen.com/performance
Nuveen Quant International Small Cap Equity Fund | Class R6  
Prospectus [Line Items]  
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 23.57%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (32.23%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen International Responsible Equity Fund  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Past performance
Performance Narrative [Text Block]

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 and Class A 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 Past Does Not Indicate Future [Text] Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future.
Performance Information Illustrates Variability of Returns [Text] 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.
Bar Chart [Heading] ANNUAL TOTAL RETURNS FOR CLASS R6 SHARES (%)Nuveen International Responsible Equity Fund
Bar Chart Closing [Text Block]

Best quarter: 18.24%, for the quarter ended December 31, 2022. Worst quarter: -22.29%, for the quarter ended March 31, 2020.
Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2025 †
Performance Table Uses Highest Federal Rate 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 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]
Average Annual Total Returns - Nuveen International Responsible Equity Fund
 12 Months Ended 60 Months Ended 120 Months Ended
Oct. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
MSCI EAFE® Index | Average Annual Return, Label [Optional Text] MSCI EAFE® Index      
MSCI EAFE® Index | Average Annual Return, Percent   31.22% 8.92% 8.18%
Class A | Average Annual Return, Percent [1]   20.77% 6.98% 7.34%
Class I | Average Annual Return, Percent   28.63% 8.49% 8.24%
Premier Class | Average Annual Return, Percent   28.44% 8.41% 8.15%
Class R6 | Average Annual Return, Percent   28.59% 8.58% 8.33%
Class R6 | After Taxes on Distributions | Average Annual Return, Percent   25.87% 7.60% 7.62%
Class R6 | After Taxes on Distributions and Sales | Average Annual Return, Percent   17.10% 6.54% 6.63%
Retirement Class | Average Annual Return, Percent   28.31% 8.32% 8.06%
[1]

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.
Performance Table One Class of after Tax Shown [Text] After-tax returns are shown for only one class, and after-tax returns for other classes will vary.
Performance Table Closing [Text Block] 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.
Performance Availability Website Address [Text] www.nuveen.com/performance
Nuveen International Responsible Equity Fund | Class R6  
Prospectus [Line Items]  
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 18.24%
Highest Quarterly Return, Date Dec. 31, 2022
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (22.29%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen Core Equity Fund  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Past performance
Performance Narrative [Text Block]

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, reimburse and/or compensate the Fund for certain fees, expenses and/or costs. Without these reductions and/or compensation, 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 Past Does Not Indicate Future [Text] Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future.
Performance Information Illustrates Variability of Returns [Text] 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.
Bar Chart [Heading] ANNUAL TOTAL RETURNS FOR CLASS R6 SHARES (%)Nuveen Core Equity Fund
Bar Chart Closing [Text Block]

Best quarter: 22.22%, for the quarter ended June 30, 2020. Worst quarter: -21.52%, for the quarter ended March 31, 2020.
Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2025 †
Performance Table Uses Highest Federal Rate 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 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]
Average Annual Total Returns - Nuveen Core Equity Fund
 12 Months Ended 60 Months Ended 87 Months Ended 120 Months Ended
Oct. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
S&P 500® Index | Average Annual Return, Label [Optional Text] S&P 500® Index        
S&P 500® Index | Average Annual Return, Percent   17.88% 14.42% 14.32% 14.82%
S&P 500® Index | Performance Inception Date       Sep. 28, 2018  
Class A | Average Annual Return, Percent [1]   7.22% 12.16%   13.13%
Class I | Average Annual Return, Percent   14.04% 13.70%   14.02%
Premier Class | Average Annual Return, Percent   13.88% 13.62%   13.95%
Class R6 | Average Annual Return, Percent   14.11% 13.80%   14.12%
Class R6 | After Taxes on Distributions | Average Annual Return, Percent   10.55% 9.81%   11.26%
Class R6 | After Taxes on Distributions and Sales | Average Annual Return, Percent   10.58% 10.01%   10.91%
Retirement Class | Average Annual Return, Percent   13.80% 13.52%   13.83%
Class W | Average Annual Return, Percent   14.51% 14.25% 13.76%  
Class W | Performance Inception Date       Sep. 28, 2018  
[1]

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.
Performance Table One Class of after Tax Shown [Text] After-tax returns are shown for only one class, and after-tax returns for other classes will vary.
Index No Deduction for Fees, Expenses, or Taxes [Text] (reflects no deductions for fees, expenses or taxes)
Performance Table Closing [Text Block] 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.
Performance Availability Website Address [Text] www.nuveen.com/performance
Nuveen Core Equity Fund | Class R6  
Prospectus [Line Items]  
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 22.22%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (21.52%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen Large Cap Growth Fund  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Past performance
Performance Narrative [Text Block]

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 index 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, reimburse and/or compensate the Fund for certain fees, expenses and/or costs. Without these reductions and/or compensation, 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 index and benchmark index listed below are unmanaged, and you cannot invest directly in an index. The returns for the broad-based securities market index 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 Past Does Not Indicate Future [Text] Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future.
Performance Information Illustrates Variability of Returns [Text] 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.
Bar Chart [Heading] ANNUAL TOTAL RETURNS FOR CLASS R6 SHARES (%)Nuveen Large Cap Growth Fund
Bar Chart Closing [Text Block]

Best quarter: 27.99%, for the quarter ended June 30, 2020. Worst quarter: -23.09%, for the quarter ended June 30, 2022.
Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2025 †
Performance Table Uses Highest Federal Rate 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 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]
Average Annual Total Returns - Nuveen Large Cap Growth Fund
 12 Months Ended 60 Months Ended 87 Months Ended 120 Months Ended
Oct. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Russell 1000® Index | Average Annual Return, Label [Optional Text] Russell 1000® Index        
Russell 1000® Index | Average Annual Return, Percent   17.37% 13.59% 14.02% 14.59%
Russell 1000® Index | Performance Inception Date       Sep. 28, 2018  
Russell 1000® Growth Index | Average Annual Return, Label [Optional Text] Russell 1000® Growth Index        
Russell 1000® Growth Index | Average Annual Return, Percent   18.56% 15.32% 17.59% 18.13%
Russell 1000® Growth Index | Performance Inception Date       Sep. 28, 2018  
Class A | Average Annual Return, Percent [1]   8.62% 9.89%   14.79%
Class I | Average Annual Return, Percent   15.60% 11.43%   15.73%
Premier Class | Average Annual Return, Percent   15.41% 11.33%   15.62%
Class R6 | Average Annual Return, Percent   15.59% 11.51%   15.80%
Class R6 | After Taxes on Distributions | Average Annual Return, Percent   12.20% 9.84%   13.33%
Class R6 | After Taxes on Distributions and Sales | Average Annual Return, Percent   11.59% 8.84%   12.40%
Retirement Class | Average Annual Return, Percent   15.30% 11.23%   15.50%
Class W | Average Annual Return, Percent   16.05% 11.95% 15.21%  
Class W | Performance Inception Date       Sep. 28, 2018  
[1]

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.
Performance Table One Class of after Tax Shown [Text] After-tax returns are shown for only one class, and after-tax returns for other classes will vary.
Index No Deduction for Fees, Expenses, or Taxes [Text] (reflects no deductions for fees, expenses or taxes)
Performance Table Closing [Text Block] 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.
Performance Availability Website Address [Text] www.nuveen.com/performance
Nuveen Large Cap Growth Fund | Class R6  
Prospectus [Line Items]  
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 27.99%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (23.09%)
Lowest Quarterly Return, Date Jun. 30, 2022
Nuveen Large Cap Value Fund  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Past performance
Performance Narrative [Text Block]

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 index 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, reimburse and/or compensate the Fund for certain fees, expenses and/or costs. Without these reductions and/or compensation, 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 index and benchmark index listed below are unmanaged, and you cannot invest directly in an index. The returns for the broad-based securities market index 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 Past Does Not Indicate Future [Text] Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future.
Performance Information Illustrates Variability of Returns [Text] 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.
Bar Chart [Heading] ANNUAL TOTAL RETURNS FOR CLASS R6 SHARES (%)Nuveen Large Cap Value Fund
Bar Chart Closing [Text Block]

Best quarter: 17.59%, for the quarter ended December 31, 2020. Worst quarter: -26.68%, for the quarter ended March 31, 2020.
Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2025 †
Performance Table Uses Highest Federal Rate 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 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]
Average Annual Total Returns - Nuveen Large Cap Value Fund
 12 Months Ended 60 Months Ended 87 Months Ended 120 Months Ended
Oct. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Russell 1000® Index | Average Annual Return, Label [Optional Text] Russell 1000® Index        
Russell 1000® Index | Average Annual Return, Percent   17.37% 13.59% 14.02% 14.59%
Russell 1000® Index | Performance Inception Date       Sep. 28, 2018  
Russell 1000® Value Index | Average Annual Return, Label [Optional Text] Russell 1000® Value Index        
Russell 1000® Value Index | Average Annual Return, Percent   15.91% 11.33% 9.74% 10.53%
Russell 1000® Value Index | Performance Inception Date       Sep. 28, 2018  
Class A | Average Annual Return, Percent [1]   10.44% 11.09%   9.81%
Class I | Average Annual Return, Percent   17.51% 12.67%   10.73%
Premier Class | Average Annual Return, Percent   17.38% 12.57%   10.63%
Class R6 | Average Annual Return, Percent   17.49% 12.74%   10.79%
Class R6 | After Taxes on Distributions | Average Annual Return, Percent   14.89% 10.78%   9.12%
Class R6 | After Taxes on Distributions and Sales | Average Annual Return, Percent   11.64% 9.76%   8.39%
Retirement Class | Average Annual Return, Percent   17.21% 12.46%   10.51%
Class W | Average Annual Return, Percent   17.99% 13.21% 10.73%  
Class W | Performance Inception Date       Sep. 28, 2018  
[1]

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.
Performance Table One Class of after Tax Shown [Text] After-tax returns are shown for only one class, and after-tax returns for other classes will vary.
Index No Deduction for Fees, Expenses, or Taxes [Text] (reflects no deductions for fees, expenses or taxes)
Performance Table Closing [Text Block] 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.
Performance Availability Website Address [Text] www.nuveen.com/performance
Nuveen Large Cap Value Fund | Class R6  
Prospectus [Line Items]  
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 17.59%
Highest Quarterly Return, Date Dec. 31, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (26.68%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen Quant Mid Cap Growth Fund  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Past performance
Performance Narrative [Text Block]

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 and Class A 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 index 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, reimburse and/or compensate the Fund for certain fees, expenses and/or costs. Without these reductions and/or compensation, the returns of the Fund would have been lower. As of March 1, 2025, certain changes were made to the Fund’s investment strategies. Performance information prior to this date reflects the Fund’s investment strategies before this date. As a result, the Fund’s performance after March 1, 2025 may differ materially from the performance information shown below for the period prior to March 1, 2025. 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 index and benchmark index listed below are unmanaged, and you cannot invest directly in an index. The returns for the broad-based securities market index 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 Past Does Not Indicate Future [Text] Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future.
Performance Information Illustrates Variability of Returns [Text] 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.
Bar Chart [Heading] ANNUAL TOTAL RETURNS FOR CLASS R6 SHARES (%)Nuveen Quant Mid Cap Growth Fund
Bar Chart Closing [Text Block]

Best quarter: 32.24%, for the quarter ended June 30, 2020. Worst quarter: -25.60%, for the quarter ended June 30, 2022.
Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2025 †
Performance Table Uses Highest Federal Rate 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 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]
Average Annual Total Returns - Nuveen Quant Mid Cap Growth Fund
 12 Months Ended 60 Months Ended 120 Months Ended
Oct. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index      
Russell 3000® Index | Average Annual Return, Percent   17.15% 13.15% 14.29%
Russell Midcap® Growth Index | Average Annual Return, Label [Optional Text] Russell Midcap® Growth Index      
Russell Midcap® Growth Index | Average Annual Return, Percent   8.66% 6.65% 12.49%
Class A | Average Annual Return, Percent [1]   (1.85%) (2.50%) 7.11%
Class I | Average Annual Return, Percent   4.44% (1.15%) 7.99%
Premier Class | Average Annual Return, Percent   4.38% (1.19%) 7.91%
Class R6 | Average Annual Return, Percent   4.48% (1.05%) 8.07%
Class R6 | After Taxes on Distributions | Average Annual Return, Percent   2.04% (2.27%) 6.01%
Class R6 | After Taxes on Distributions and Sales | Average Annual Return, Percent   4.42% (0.85%) 6.03%
Retirement Class | Average Annual Return, Percent   4.22% (1.30%) 7.80%
[1]

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.
Performance Table One Class of after Tax Shown [Text] After-tax returns are shown for only one class, and after-tax returns for other classes will vary.
Index No Deduction for Fees, Expenses, or Taxes [Text] (reflects no deductions for fees, expenses or taxes)
Performance Table Closing [Text Block] 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.
Performance Availability Website Address [Text] www.nuveen.com/performance
Nuveen Quant Mid Cap Growth Fund | Class R6  
Prospectus [Line Items]  
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 32.24%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (25.60%)
Lowest Quarterly Return, Date Jun. 30, 2022
Nuveen Mid Cap Value Fund  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Past performance
Performance Narrative [Text Block]

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 and Class A 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 index 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, reimburse and/or compensate the Fund for certain fees, expenses and/or costs. Without these reductions and/or compensation, 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 index and benchmark index listed below are unmanaged, and you cannot invest directly in an index. The returns for the broad-based securities market index 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 Past Does Not Indicate Future [Text] Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future.
Performance Information Illustrates Variability of Returns [Text] 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.
Bar Chart [Heading] ANNUAL TOTAL RETURNS FOR CLASS R6 SHARES (%)Nuveen Mid Cap Value Fund
Bar Chart Closing [Text Block]

Best quarter: 21.51%, for the quarter ended December 31, 2020. Worst quarter: -34.38%, for the quarter ended March 31, 2020.
Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2025 †
Performance Table Uses Highest Federal Rate 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 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]
Average Annual Total Returns - Nuveen Mid Cap Value Fund
 12 Months Ended 60 Months Ended 120 Months Ended
Oct. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index      
Russell 3000® Index | Average Annual Return, Percent   17.15% 13.15% 14.29%
Russell Midcap® Value Index | Average Annual Return, Label [Optional Text] Russell Midcap® Value Index      
Russell Midcap® Value Index | Average Annual Return, Percent   11.05% 9.83% 9.78%
Class A | Average Annual Return, Percent [1]   3.53% 9.12% 7.58%
Class I | Average Annual Return, Percent   10.11% 10.64% 8.45%
Premier Class | Average Annual Return, Percent   10.11% 10.58% 8.38%
Class R6 | Average Annual Return, Percent   10.22% 10.75% 8.55%
Class R6 | After Taxes on Distributions | Average Annual Return, Percent   7.91% 8.26% 6.09%
Class R6 | After Taxes on Distributions and Sales | Average Annual Return, Percent   7.16% 7.97% 6.26%
Retirement Class | Average Annual Return, Percent   9.98% 10.48% 8.28%
[1]

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.
Performance Table One Class of after Tax Shown [Text] After-tax returns are shown for only one class, and after-tax returns for other classes will vary.
Index No Deduction for Fees, Expenses, or Taxes [Text] (reflects no deductions for fees, expenses or taxes)
Performance Table Closing [Text Block] 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.
Performance Availability Website Address [Text] www.nuveen.com/performance
Nuveen Mid Cap Value Fund | Class R6  
Prospectus [Line Items]  
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 21.51%
Highest Quarterly Return, Date Dec. 31, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (34.38%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen Quant Small Cap Equity Fund  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Past performance
Performance Narrative [Text Block]

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 index 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 index and benchmark index listed below are unmanaged, and you cannot invest directly in an index. The returns for the broad-based securities market index 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 Past Does Not Indicate Future [Text] Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future.
Performance Information Illustrates Variability of Returns [Text] 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.
Bar Chart [Heading] ANNUAL TOTAL RETURNS FOR CLASS R6 SHARES (%)Nuveen Quant Small Cap Equity Fund
Bar Chart Closing [Text Block]

Best quarter: 32.14%, for the quarter ended December 31, 2020. Worst quarter: -33.90%, for the quarter ended March 31, 2020.
Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2025 †
Performance Table Uses Highest Federal Rate 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 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]
Average Annual Total Returns - Nuveen Quant Small Cap Equity Fund
 12 Months Ended 60 Months Ended 87 Months Ended 120 Months Ended
Oct. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index        
Russell 3000® Index | Average Annual Return, Percent   17.15% 13.15% 13.57% 14.29%
Russell 3000® Index | Performance Inception Date       Sep. 28, 2018  
Russell 2000® Index | Average Annual Return, Label [Optional Text] Russell 2000® Index        
Russell 2000® Index | Average Annual Return, Percent   12.81% 6.09% 6.83% 9.62%
Russell 2000® Index | Performance Inception Date       Sep. 28, 2018  
Class A | Average Annual Return, Percent [1]   9.41% 9.56%   10.20%
Class I | Average Annual Return, Percent   16.53% 11.15%   11.12%
Premier Class | Average Annual Return, Percent   16.37% 11.03%   11.02%
Class R6 | Average Annual Return, Percent   16.48% 11.20%   11.18%
Class R6 | After Taxes on Distributions | Average Annual Return, Percent   14.02% 8.51%   8.74%
Class R6 | After Taxes on Distributions and Sales | Average Annual Return, Percent   11.25% 8.23%   8.37%
Retirement Class | Average Annual Return, Percent   16.25% 10.92%   10.91%
Class W | Average Annual Return, Percent   16.97% 11.66% 9.81%  
Class W | Performance Inception Date       Sep. 28, 2018  
[1]

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.
Performance Table One Class of after Tax Shown [Text] After-tax returns are shown for only one class, and after-tax returns for other classes will vary.
Index No Deduction for Fees, Expenses, or Taxes [Text] (reflects no deductions for fees, expenses or taxes)
Performance Table Closing [Text Block] 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.
Performance Availability Website Address [Text] www.nuveen.com/performance
Nuveen Quant Small Cap Equity Fund | Class R6  
Prospectus [Line Items]  
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 32.14%
Highest Quarterly Return, Date Dec. 31, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (33.90%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen Quant Small/Mid Cap Equity Fund  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Past performance
Performance Narrative [Text Block]

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 since inception of Class R6. 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 index 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 index and benchmark index listed below are unmanaged, and you cannot invest directly in an index. The returns for the broad-based securities market index 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 Past Does Not Indicate Future [Text] Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future.
Performance Information Illustrates Variability of Returns [Text] 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.
Bar Chart [Heading] ANNUAL TOTAL RETURNS FOR CLASS R6 SHARES (%)Nuveen Quant Small/Mid Cap Equity Fund
Bar Chart Closing [Text Block]

Best quarter: 27.30%, for the quarter ended June 30, 2020. Worst quarter: -31.11%, for the quarter ended March 31, 2020.
Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2025 †
Performance Table Uses Highest Federal Rate 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 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]
Average Annual Total Returns - Nuveen Quant Small/Mid Cap Equity Fund
 12 Months Ended 60 Months Ended 87 Months Ended 113 Months Ended
Oct. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index        
Russell 3000® Index | Average Annual Return, Percent   17.15% 13.15%   14.29%
Russell 3000® Index | Performance Inception Date         Aug. 05, 2016
Russell 3000® Index | Average Annual Return, Percent       13.57%  
Russell 3000® Index | Performance Inception Date       Sep. 28, 2018  
Russell 2500™ Index | Average Annual Return, Label [Optional Text] Russell 2500™ Index        
Russell 2500™ Index | Average Annual Return, Percent   11.91% 7.26%   10.00%
Russell 2500™ Index | Performance Inception Date         Aug. 05, 2016
Russell 2500™ Index | Average Annual Return, Percent       8.22%  
Russell 2500™ Index | Performance Inception Date       Sep. 28, 2018  
Class A | Average Annual Return, Percent [1]   9.08% 11.21%   12.40%
Class A | Performance Inception Date         Aug. 05, 2016
Class I | Average Annual Return, Percent   16.11% 12.79%   13.45%
Class I | Performance Inception Date         Aug. 05, 2016
Premier Class | Average Annual Return, Percent   15.96% 12.72%   13.34%
Premier Class | Performance Inception Date         Aug. 05, 2016
Class R6 | Average Annual Return, Percent   16.20% 12.92%   13.52%
Class R6 | Performance Inception Date         Aug. 05, 2016
Class R6 | After Taxes on Distributions | Average Annual Return, Percent   13.79% 10.00%   11.10%
Class R6 | After Taxes on Distributions | Performance Inception Date         Aug. 05, 2016
Class R6 | After Taxes on Distributions and Sales | Average Annual Return, Percent   11.06% 9.50%   10.34%
Class R6 | After Taxes on Distributions and Sales | Performance Inception Date         Aug. 05, 2016
Retirement Class | Average Annual Return, Percent   15.91% 12.66%   13.24%
Retirement Class | Performance Inception Date         Aug. 05, 2016
Class W | Average Annual Return, Percent   16.70% 13.46% 12.39%  
Class W | Performance Inception Date       Sep. 28, 2018  
[1]

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.
Performance Table One Class of after Tax Shown [Text] After-tax returns are shown for only one class, and after-tax returns for other classes will vary.
Index No Deduction for Fees, Expenses, or Taxes [Text] (reflects no deductions for fees, expenses or taxes)
Performance Table Closing [Text Block] 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.
Performance Availability Website Address [Text] www.nuveen.com/performance
Nuveen Quant Small/Mid Cap Equity Fund | Class R6  
Prospectus [Line Items]  
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 27.30%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (31.11%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen Large Cap Responsible Equity Fund  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Past performance
Performance Narrative [Text Block]

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 and Class A 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 Past Does Not Indicate Future [Text] Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future.
Performance Information Illustrates Variability of Returns [Text] 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.
Bar Chart [Heading] ANNUAL TOTAL RETURNS FOR CLASS R6 SHARES (%)Nuveen Large Cap Responsible Equity Fund
Bar Chart Closing [Text Block]

Best quarter: 22.26%, for the quarter ended June 30, 2020. Worst quarter: -20.49%, for the quarter ended March 31, 2020.
Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2025 †
Performance Table Uses Highest Federal Rate 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 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]
Average Annual Total Returns - Nuveen Large Cap Responsible Equity Fund
 12 Months Ended 60 Months Ended 120 Months Ended
Oct. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
S&P 500® Index | Average Annual Return, Label [Optional Text] S&P 500® Index      
S&P 500® Index | Average Annual Return, Percent   17.88% 14.42% 14.82%
Class A | Average Annual Return, Percent [1]   9.63% 10.32% 12.71%
Class I | Average Annual Return, Percent   16.60% 11.84% 13.61%
Premier Class | Average Annual Return, Percent   16.47% 11.74% 13.50%
Class R6 | Average Annual Return, Percent   16.61% 11.93% 13.68%
Class R6 | After Taxes on Distributions | Average Annual Return, Percent   14.22% 9.57% 11.79%
Class R6 | After Taxes on Distributions and Sales | Average Annual Return, Percent   10.86% 8.98% 10.87%
Retirement Class | Average Annual Return, Percent   16.36% 11.65% 13.40%
[1]

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.
Performance Table One Class of after Tax Shown [Text] After-tax returns are shown for only one class, and after-tax returns for other classes will vary.
Index No Deduction for Fees, Expenses, or Taxes [Text] (reflects no deductions for fees, expenses or taxes)
Performance Table Closing [Text Block] 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.
Performance Availability Website Address [Text] www.nuveen.com/performance
Nuveen Large Cap Responsible Equity Fund | Class R6  
Prospectus [Line Items]  
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 22.26%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (20.49%)
Lowest Quarterly Return, Date Mar. 31, 2020