v3.26.1
Performance Management
May 31, 2025
Nuveen Lifecycle Retirement Income 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 the Retirement Class 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 the Retirement Class may vary from the other share classes. Below the bar chart are the best and worst returns of the Retirement Class 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 the Retirement, Class A, Class I, Premier and Class R6 classes over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2024, and how those returns compare to those of a broad-based securities market index and a composite index that represents the market sectors in which the Fund invests across the equity and fixed-income asset classes. 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 the Retirement Class shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for the Retirement Class shares.

The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund and certain Underlying Funds 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 indices listed below are unmanaged, and you cannot invest directly in an index. The returns for the indices 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 RETIREMENT CLASS SHARES (%)† Nuveen Lifecycle Retirement Income Fund
Bar Chart Footnotes [Text Block]

 The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was 5.52%.

Bar Chart Closing [Text Block]

Best quarter: 10.66%, for the quarter ended June 30, 2020. Worst quarter: -9.68%, for the quarter ended March 31, 2020.

Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2024 #
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 Lifecycle Retirement Income Fund
12 Months Ended 60 Months Ended 109 Months Ended 120 Months Ended
May 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index        
Russell 3000® Index | Average Annual Return, Percent   23.81% 13.86% 13.55% 12.55%
Russell 3000® Index | Performance Inception Date       Dec. 04, 2015  
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Label [Optional Text] Bloomberg U.S. Aggregate Bond Index        
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Percent   1.25% (0.33%) 1.41% 1.35%
Bloomberg U.S. Aggregate Bond Index | Performance Inception Date       Dec. 04, 2015  
S&P Target Date Retirement Income Index | Average Annual Return, Label [Optional Text] S&P Target Date Retirement Income Index        
S&P Target Date Retirement Income Index | Average Annual Return, Percent   6.54% 3.62% 4.50% 4.14%
S&P Target Date Retirement Income Index | Performance Inception Date       Dec. 04, 2015  
Lifecycle Retirement Income Fund Composite Index | Average Annual Return, Label [Optional Text] [1] Lifecycle Retirement Income Fund Composite Index        
Lifecycle Retirement Income Fund Composite Index | Average Annual Return, Percent   7.92% 4.74% 5.61% 5.16%
Lifecycle Retirement Income Fund Composite Index | Performance Inception Date       Dec. 04, 2015  
Class A | Average Annual Return, Percent [2]   1.23% 2.95%   4.20%
Class I | Average Annual Return, Percent   7.55% 4.35% 5.36%  
Class I | Performance Inception Date       Dec. 04, 2015  
Premier Class | Average Annual Return, Percent   7.49% 4.28%   4.92%
Class R6 | Average Annual Return, Percent   7.66% 4.43%   5.08%
Retirement Class | Average Annual Return, Percent   7.31% 4.17%   4.81%
Retirement Class | After Taxes on Distributions | Average Annual Return, Percent   6.06% 2.55%   3.34%
Retirement Class | After Taxes on Distributions and Sales | Average Annual Return, Percent   4.48% 2.75%   3.31%
[1]

As of the close of business on December 31, 2024, the Lifecycle Retirement Income Fund Composite Index consisted of: 40.0% Bloomberg U.S. Aggregate Bond Index; 26.0% Russell 3000® Index; 14.0% MSCI All Country World Index ex USA Investable Market Index; 10.0% Bloomberg U.S. 1–3 Year Government/Credit Bond Index; and 10.0% Bloomberg U.S. Treasury Inflation Protected Securities (TIPS) 1-10 Year Index. The Fund’s composite benchmark, the components that make up a composite benchmark and the method of calculating a composite benchmark’s performance may vary over time.

[2]

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 Lifecycle Retirement Income Fund | Retirement Class  
Prospectus [Line Items]  
Year to Date Return, Label [Optional Text] The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was
Bar Chart, Year to Date Return 5.52%
Bar Chart, Year to Date Return, Date Jun. 30, 2025
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 10.66%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (9.68%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen Lifecycle 2010 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 the Retirement Class 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 the Retirement Class may vary from the other share classes. Below the bar chart are the best and worst returns of the Retirement Class 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 the Retirement, Class I, Premier and Class R6 classes over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2024, and how those returns compare to those of a broad-based securities market index and a composite index that represents the market sectors in which the Fund invests across the equity and fixed-income asset classes. 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 the Retirement Class shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for the Retirement Class shares.

The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund and certain Underlying Funds 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 indices listed below are unmanaged, and you cannot invest directly in an index. The returns for the indices 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 RETIREMENT CLASS SHARES (%)† Nuveen Lifecycle 2010 Fund
Bar Chart Footnotes [Text Block]

 The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was 5.49%.

Bar Chart Closing [Text Block]

Best quarter: 10.65%, for the quarter ended June 30, 2020. Worst quarter: -9.69%, for the quarter ended March 31, 2020.

Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2024 #
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 Lifecycle 2010 Fund
12 Months Ended 60 Months Ended 109 Months Ended 120 Months Ended
May 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index        
Russell 3000® Index | Average Annual Return, Percent   23.81% 13.86% 13.55% 12.55%
Russell 3000® Index | Performance Inception Date       Dec. 04, 2015  
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Label [Optional Text] Bloomberg U.S. Aggregate Bond Index        
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Percent   1.25% (0.33%) 1.41% 1.35%
Bloomberg U.S. Aggregate Bond Index | Performance Inception Date       Dec. 04, 2015  
S&P Target Date 2010 Index | Average Annual Return, Label [Optional Text] S&P Target Date 2010 Index        
S&P Target Date 2010 Index | Average Annual Return, Percent   6.74% 4.17% 5.04% 4.66%
S&P Target Date 2010 Index | Performance Inception Date       Dec. 04, 2015  
Lifecycle 2010 Fund Composite Index | Average Annual Return, Label [Optional Text] [1] Lifecycle 2010 Fund Composite Index        
Lifecycle 2010 Fund Composite Index | Average Annual Return, Percent   7.46% 4.56% 5.60% 5.15%
Lifecycle 2010 Fund Composite Index | Performance Inception Date       Dec. 04, 2015  
Class I | Average Annual Return, Percent   7.42% 4.36% 5.48%  
Class I | Performance Inception Date       Dec. 04, 2015  
Premier Class | Average Annual Return, Percent   7.42% 4.29%   5.03%
Class R6 | Average Annual Return, Percent   7.59% 4.46%   5.19%
Retirement Class | Average Annual Return, Percent   7.31% 4.19%   4.91%
Retirement Class | After Taxes on Distributions | Average Annual Return, Percent   5.85% 2.45%   3.36%
Retirement Class | After Taxes on Distributions and Sales | Average Annual Return, Percent   4.72% 2.78%   3.39%
[1]

As of the close of business on December 31, 2024, the Lifecycle 2010 Fund Composite Index consisted of: 40.0% Bloomberg U.S. Aggregate Bond Index; 23.1% Russell 3000® Index; 12.4% MSCI All Country World Index ex USA Investable Market Index; 14.5% Bloomberg U.S. 1–3 Year Government/Credit Bond Index; and 10.0% Bloomberg U.S. Treasury Inflation Protected Securities (TIPS) 1-10 Year Index. The Fund’s composite benchmark, the components that make up a composite benchmark and the method of calculating a composite benchmark’s performance may vary over time.

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 Lifecycle 2010 Fund | Retirement Class  
Prospectus [Line Items]  
Year to Date Return, Label [Optional Text] The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was
Bar Chart, Year to Date Return 5.49%
Bar Chart, Year to Date Return, Date Jun. 30, 2025
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 10.65%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (9.69%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen Lifecycle 2015 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 the Retirement Class 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 the Retirement Class may vary from the other share classes. Below the bar chart are the best and worst returns of the Retirement Class 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 the Retirement, Class I, Premier and Class R6 classes over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2024, and how those returns compare to those of a broad-based securities market index and a composite index that represents the market sectors in which the Fund invests across the equity and fixed-income asset classes. 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 the Retirement Class shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for the Retirement Class shares.

The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund and certain Underlying Funds 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 indices listed below are unmanaged, and you cannot invest directly in an index. The returns for the indices 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 RETIREMENT CLASS SHARES (%)† Nuveen Lifecycle 2015 Fund
Bar Chart Footnotes [Text Block]

 The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was 5.53%.

Bar Chart Closing [Text Block]

Best quarter: 11.65%, for the quarter ended June 30, 2020. Worst quarter: -10.87%, for the quarter ended March 31, 2020.

Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2024 #
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 Lifecycle 2015 Fund
12 Months Ended 60 Months Ended 109 Months Ended 120 Months Ended
May 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index        
Russell 3000® Index | Average Annual Return, Percent   23.81% 13.86% 13.55% 12.55%
Russell 3000® Index | Performance Inception Date       Dec. 04, 2015  
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Label [Optional Text] Bloomberg U.S. Aggregate Bond Index        
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Percent   1.25% (0.33%) 1.41% 1.35%
Bloomberg U.S. Aggregate Bond Index | Performance Inception Date       Dec. 04, 2015  
S&P Target Date 2015 Index | Average Annual Return, Label [Optional Text] S&P Target Date 2015 Index        
S&P Target Date 2015 Index | Average Annual Return, Percent   7.25% 4.56% 5.51% 5.11%
S&P Target Date 2015 Index | Performance Inception Date       Dec. 04, 2015  
Lifecycle 2015 Fund Composite Index | Average Annual Return, Label [Optional Text] [1] Lifecycle 2015 Fund Composite Index        
Lifecycle 2015 Fund Composite Index | Average Annual Return, Percent   8.09% 4.99% 6.04% 5.56%
Lifecycle 2015 Fund Composite Index | Performance Inception Date       Dec. 04, 2015  
Class I | Average Annual Return, Percent   7.62% 4.57% 5.74%  
Class I | Performance Inception Date       Dec. 04, 2015  
Premier Class | Average Annual Return, Percent   7.60% 4.54%   5.31%
Class R6 | Average Annual Return, Percent   7.86% 4.69%   5.48%
Retirement Class | Average Annual Return, Percent   7.52% 4.43%   5.21%
Retirement Class | After Taxes on Distributions | Average Annual Return, Percent   6.43% 2.99%   3.71%
Retirement Class | After Taxes on Distributions and Sales | Average Annual Return, Percent   4.64% 3.03%   3.65%
[1]

As of the close of business on December 31, 2024, the Lifecycle 2015 Fund Composite Index consisted of: 39.9% Bloomberg U.S. Aggregate Bond Index; 26.3% Russell 3000® Index; 14.2% MSCI All Country World Index ex USA Investable Market Index; 9.8% Bloomberg U.S. 1–3 Year Government/Credit Bond Index; and 9.8% Bloomberg U.S. Treasury Inflation Protected Securities (TIPS) 1-10 Year Index. The Fund’s composite benchmark, the components that make up a composite benchmark and the method of calculating a composite benchmark’s performance may vary over time.

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 Lifecycle 2015 Fund | Retirement Class  
Prospectus [Line Items]  
Year to Date Return, Label [Optional Text] The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was
Bar Chart, Year to Date Return 5.53%
Bar Chart, Year to Date Return, Date Jun. 30, 2025
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 11.65%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (10.87%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen Lifecycle 2020 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 the Retirement Class 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 the Retirement Class may vary from the other share classes. Below the bar chart are the best and worst returns of the Retirement Class 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 the Retirement, Class I, Premier and Class R6 classes over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2024, and how those returns compare to those of a broad-based securities market index and a composite index that represents the market sectors in which the Fund invests across the equity and fixed-income asset classes. 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 the Retirement Class shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for the Retirement Class shares.

The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund and certain Underlying Funds 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 indices listed below are unmanaged, and you cannot invest directly in an index. The returns for the indices 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 RETIREMENT CLASS SHARES (%)† Nuveen Lifecycle 2020 Fund
Bar Chart Footnotes [Text Block]

 The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was 5.74%.

Bar Chart Closing [Text Block]

Best quarter: 12.51%, for the quarter ended June 30, 2020. Worst quarter: -12.00%, for the quarter ended March 31, 2020.

Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2024 #
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 Lifecycle 2020 Fund
12 Months Ended 60 Months Ended 109 Months Ended 120 Months Ended
May 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index        
Russell 3000® Index | Average Annual Return, Percent   23.81% 13.86% 13.55% 12.55%
Russell 3000® Index | Performance Inception Date       Dec. 04, 2015  
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Label [Optional Text] Bloomberg U.S. Aggregate Bond Index        
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Percent   1.25% (0.33%) 1.41% 1.35%
Bloomberg U.S. Aggregate Bond Index | Performance Inception Date       Dec. 04, 2015  
S&P Target Date 2020 Index | Average Annual Return, Label [Optional Text] S&P Target Date 2020 Index        
S&P Target Date 2020 Index | Average Annual Return, Percent   8.09% 4.88% 5.94% 5.52%
S&P Target Date 2020 Index | Performance Inception Date       Dec. 04, 2015  
Lifecycle 2020 Fund Composite Index | Average Annual Return, Label [Optional Text] [1] Lifecycle 2020 Fund Composite Index        
Lifecycle 2020 Fund Composite Index | Average Annual Return, Percent   8.77% 5.43% 6.54% 6.01%
Lifecycle 2020 Fund Composite Index | Performance Inception Date       Dec. 04, 2015  
Class I | Average Annual Return, Percent   8.31% 4.97% 6.18%  
Class I | Performance Inception Date       Dec. 04, 2015  
Premier Class | Average Annual Return, Percent   8.29% 4.91%   5.72%
Class R6 | Average Annual Return, Percent   8.33% 5.05%   5.87%
Retirement Class | Average Annual Return, Percent   8.17% 4.80%   5.61%
Retirement Class | After Taxes on Distributions | Average Annual Return, Percent   7.04% 3.37%   4.15%
Retirement Class | After Taxes on Distributions and Sales | Average Annual Return, Percent   5.12% 3.35%   4.01%
[1]

As of the close of business on December 31, 2024, the Lifecycle 2020 Fund Composite Index consisted of: 38.9% Bloomberg U.S. Aggregate Bond Index; 29.6% Russell 3000® Index; 15.9% MSCI All Country World Index ex USA Investable Market Index; 7.8% Bloomberg U.S. 1–3 Year Government/Credit Bond Index; and 7.8% Bloomberg U.S. Treasury Inflation Protected Securities (TIPS) 1-10 Year Index. The Fund’s composite benchmark, the components that make up a composite benchmark and the method of calculating a composite benchmark’s performance may vary over time.

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 Lifecycle 2020 Fund | Retirement Class  
Prospectus [Line Items]  
Year to Date Return, Label [Optional Text] The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was
Bar Chart, Year to Date Return 5.74%
Bar Chart, Year to Date Return, Date Jun. 30, 2025
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 12.51%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (12.00%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen Lifecycle 2025 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 the Retirement Class 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 the Retirement Class may vary from the other share classes. Below the bar chart are the best and worst returns of the Retirement Class 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 the Retirement, Class I, Premier and Class R6 classes over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2024, and how those returns compare to those of a broad-based securities market index and a composite index that represents the market sectors in which the Fund invests across the equity and fixed-income asset classes. 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 the Retirement Class shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for the Retirement Class shares.

The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund and certain Underlying Funds 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 indices listed below are unmanaged, and you cannot invest directly in an index. The returns for the indices 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 RETIREMENT CLASS SHARES (%)† Nuveen Lifecycle 2025 Fund
Bar Chart Footnotes [Text Block]

 The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was 6.01%.

Bar Chart Closing [Text Block]

Best quarter: 14.12%, for the quarter ended June 30, 2020. Worst quarter: -13.85%, for the quarter ended March 31, 2020.

Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2024 #
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 Lifecycle 2025 Fund
12 Months Ended 60 Months Ended 109 Months Ended 120 Months Ended
May 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index        
Russell 3000® Index | Average Annual Return, Percent   23.81% 13.86% 13.55% 12.55%
Russell 3000® Index | Performance Inception Date       Dec. 04, 2015  
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Label [Optional Text] Bloomberg U.S. Aggregate Bond Index        
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Percent   1.25% (0.33%) 1.41% 1.35%
Bloomberg U.S. Aggregate Bond Index | Performance Inception Date       Dec. 04, 2015  
S&P Target Date 2025 Index | Average Annual Return, Label [Optional Text] S&P Target Date 2025 Index        
S&P Target Date 2025 Index | Average Annual Return, Percent   8.44% 5.55% 6.62% 6.14%
S&P Target Date 2025 Index | Performance Inception Date       Dec. 04, 2015  
Lifecycle 2025 Fund Composite Index | Average Annual Return, Label [Optional Text] [1] Lifecycle 2025 Fund Composite Index        
Lifecycle 2025 Fund Composite Index | Average Annual Return, Percent   9.57% 6.06% 7.20% 6.60%
Lifecycle 2025 Fund Composite Index | Performance Inception Date       Dec. 04, 2015  
Class I | Average Annual Return, Percent   8.95% 5.60% 6.77%  
Class I | Performance Inception Date       Dec. 04, 2015  
Premier Class | Average Annual Return, Percent   8.93% 5.50%   6.26%
Class R6 | Average Annual Return, Percent   9.06% 5.67%   6.43%
Retirement Class | Average Annual Return, Percent   8.81% 5.41%   6.15%
Retirement Class | After Taxes on Distributions | Average Annual Return, Percent   7.70% 4.02%   4.73%
Retirement Class | After Taxes on Distributions and Sales | Average Annual Return, Percent   5.57% 3.86%   4.48%
[1]

As of the close of business on December 31, 2024, the Lifecycle 2025 Fund Composite Index consisted of: 37.6% Bloomberg U.S. Aggregate Bond Index; 33.0% Russell 3000® Index; 17.8% MSCI All Country World Index ex USA Investable Market Index; 5.8% Bloomberg U.S. 1–3 Year Government/Credit Bond Index; and 5.8% Bloomberg U.S. Treasury Inflation Protected Securities (TIPS) 1-10 Year Index. The Fund’s composite benchmark, the components that make up a composite benchmark and the method of calculating a composite benchmark’s performance may vary over time.

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 Lifecycle 2025 Fund | Retirement Class  
Prospectus [Line Items]  
Year to Date Return, Label [Optional Text] The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was
Bar Chart, Year to Date Return 6.01%
Bar Chart, Year to Date Return, Date Jun. 30, 2025
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 14.12%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (13.85%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen Lifecycle 2030 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 the Retirement Class 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 the Retirement Class may vary from the other share classes. Below the bar chart are the best and worst returns of the Retirement Class 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 the Retirement, Class I, Premier and Class R6 classes over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2024, and how those returns compare to those of a broad-based securities market index and a composite index that represents the market sectors in which the Fund invests across the equity and fixed-income asset classes. 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 the Retirement Class shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for the Retirement Class shares.

The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund and certain Underlying Funds 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 indices listed below are unmanaged, and you cannot invest directly in an index. The returns for the indices 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 RETIREMENT CLASS SHARES (%)† Nuveen Lifecycle 2030 Fund
Bar Chart Footnotes [Text Block]

 The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was 6.49%.

Bar Chart Closing [Text Block]

Best quarter: 15.61%, for the quarter ended June 30, 2020. Worst quarter: -15.66%, for the quarter ended March 31, 2020.

Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2024 #
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 Lifecycle 2030 Fund
12 Months Ended 60 Months Ended 109 Months Ended 120 Months Ended
May 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index        
Russell 3000® Index | Average Annual Return, Percent   23.81% 13.86% 13.55% 12.55%
Russell 3000® Index | Performance Inception Date       Dec. 04, 2015  
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Label [Optional Text] Bloomberg U.S. Aggregate Bond Index        
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Percent   1.25% (0.33%) 1.41% 1.35%
Bloomberg U.S. Aggregate Bond Index | Performance Inception Date       Dec. 04, 2015  
S&P Target Date 2030 Index | Average Annual Return, Label [Optional Text] S&P Target Date 2030 Index        
S&P Target Date 2030 Index | Average Annual Return, Percent   9.90% 6.46% 7.41% 6.87%
S&P Target Date 2030 Index | Performance Inception Date       Dec. 04, 2015  
Lifecycle 2030 Fund Composite Index | Average Annual Return, Label [Optional Text] [1] Lifecycle 2030 Fund Composite Index        
Lifecycle 2030 Fund Composite Index | Average Annual Return, Percent   10.74% 6.81% 7.92% 7.26%
Lifecycle 2030 Fund Composite Index | Performance Inception Date       Dec. 04, 2015  
Class I | Average Annual Return, Percent   10.05% 6.34% 7.43%  
Class I | Performance Inception Date       Dec. 04, 2015  
Premier Class | Average Annual Return, Percent   10.05% 6.24%   6.87%
Class R6 | Average Annual Return, Percent   10.16% 6.41%   7.04%
Retirement Class | Average Annual Return, Percent   9.81% 6.13%   6.76%
Retirement Class | After Taxes on Distributions | Average Annual Return, Percent   8.82% 4.79%   5.36%
Retirement Class | After Taxes on Distributions and Sales | Average Annual Return, Percent   6.16% 4.47%   5.01%
[1]

As of the close of business on December 31, 2024, the Lifecycle 2030 Fund Composite Index consisted of: 38.2% Russell 3000® Index; 33.6% Bloomberg U.S. Aggregate Bond Index; 20.6% MSCI All Country World Index ex USA Investable Market Index; 3.8% Bloomberg U.S. 1–3 Year Government/Credit Bond Index; and 3.8% Bloomberg U.S. Treasury Inflation Protected Securities (TIPS) 1-10 Year Index. The Fund’s composite benchmark, the components that make up a composite benchmark and the method of calculating a composite benchmark’s performance may vary over time.

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 Lifecycle 2030 Fund | Retirement Class  
Prospectus [Line Items]  
Year to Date Return, Label [Optional Text] The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was
Bar Chart, Year to Date Return 6.49%
Bar Chart, Year to Date Return, Date Jun. 30, 2025
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 15.61%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (15.66%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen Lifecycle 2035 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 the Retirement Class 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 the Retirement Class may vary from the other share classes. Below the bar chart are the best and worst returns of the Retirement Class 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 the Retirement, Class I, Premier and Class R6 classes over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2024, and how those returns compare to those of a broad-based securities market index and a composite index that represents the market sectors in which the Fund invests across the equity and fixed-income asset classes. 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 the Retirement Class shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for the Retirement Class shares.

The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund and certain Underlying Funds 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 indices listed below are unmanaged, and you cannot invest directly in an index. The returns for the indices 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 RETIREMENT CLASS SHARES (%)† Nuveen Lifecycle 2035 Fund
Bar Chart Footnotes [Text Block]

 The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was 6.95%.

Bar Chart Closing [Text Block]

Best quarter: 17.18%, for the quarter ended June 30, 2020. Worst quarter: -17.52%, for the quarter ended March 31, 2020.

Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2024 #
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 Lifecycle 2035 Fund
12 Months Ended 60 Months Ended 109 Months Ended 120 Months Ended
May 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index        
Russell 3000® Index | Average Annual Return, Percent   23.81% 13.86% 13.55% 12.55%
Russell 3000® Index | Performance Inception Date       Dec. 04, 2015  
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Label [Optional Text] Bloomberg U.S. Aggregate Bond Index        
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Percent   1.25% (0.33%) 1.41% 1.35%
Bloomberg U.S. Aggregate Bond Index | Performance Inception Date       Dec. 04, 2015  
S&P Target Date 2035 Index | Average Annual Return, Label [Optional Text] S&P Target Date 2035 Index        
S&P Target Date 2035 Index | Average Annual Return, Percent   11.38% 7.44% 8.21% 7.60%
S&P Target Date 2035 Index | Performance Inception Date       Dec. 04, 2015  
Lifecycle 2035 Fund Composite Index | Average Annual Return, Label [Optional Text] [1] Lifecycle 2035 Fund Composite Index        
Lifecycle 2035 Fund Composite Index | Average Annual Return, Percent   12.07% 7.68% 8.69% 7.95%
Lifecycle 2035 Fund Composite Index | Performance Inception Date       Dec. 04, 2015  
Class I | Average Annual Return, Percent   11.15% 7.10% 8.10%  
Class I | Performance Inception Date       Dec. 04, 2015  
Premier Class | Average Annual Return, Percent   11.22% 7.05%   7.51%
Class R6 | Average Annual Return, Percent   11.36% 7.22%   7.67%
Retirement Class | Average Annual Return, Percent   11.00% 6.94%   7.40%
Retirement Class | After Taxes on Distributions | Average Annual Return, Percent   10.15% 5.62%   6.01%
Retirement Class | After Taxes on Distributions and Sales | Average Annual Return, Percent   6.86% 5.13%   5.55%
[1]

As of the close of business on December 31, 2024, the Lifecycle 2035 Fund Composite Index consisted of: 43.7% Russell 3000® Index; 29.2% Bloomberg U.S. Aggregate Bond Index; 23.5% MSCI All Country World Index ex USA Investable Market Index; 1.8% Bloomberg U.S. 1–3 Year Government/Credit Bond Index; and 1.8% Bloomberg U.S. Treasury Inflation Protected Securities (TIPS) 1-10 Year Index. The Fund’s composite benchmark, the components that make up a composite benchmark and the method of calculating a composite benchmark’s performance may vary over time.

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 Lifecycle 2035 Fund | Retirement Class  
Prospectus [Line Items]  
Year to Date Return, Label [Optional Text] The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was
Bar Chart, Year to Date Return 6.95%
Bar Chart, Year to Date Return, Date Jun. 30, 2025
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 17.18%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (17.52%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen Lifecycle 2040 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 the Retirement Class 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 the Retirement Class may vary from the other share classes. Below the bar chart are the best and worst returns of the Retirement Class 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 the Retirement, Class I, Premier and Class R6 classes over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2024, and how those returns compare to those of a broad-based securities market index and a composite index that represents the market sectors in which the Fund invests across the equity and fixed-income asset classes. 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 the Retirement Class shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for the Retirement Class shares.

The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund and certain Underlying Funds 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 indices listed below are unmanaged, and you cannot invest directly in an index. The returns for the indices 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 RETIREMENT CLASS SHARES (%)† Nuveen Lifecycle 2040 Fund
Bar Chart Footnotes [Text Block]

 The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was 7.51%.

Bar Chart Closing [Text Block]

Best quarter: 18.70%, for the quarter ended June 30, 2020. Worst quarter: -19.23%, for the quarter ended March 31, 2020.

Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2024 #
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 Lifecycle 2040 Fund
12 Months Ended 60 Months Ended 109 Months Ended 120 Months Ended
May 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index        
Russell 3000® Index | Average Annual Return, Percent   23.81% 13.86% 13.55% 12.55%
Russell 3000® Index | Performance Inception Date       Dec. 04, 2015  
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Label [Optional Text] Bloomberg U.S. Aggregate Bond Index        
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Percent   1.25% (0.33%) 1.41% 1.35%
Bloomberg U.S. Aggregate Bond Index | Performance Inception Date       Dec. 04, 2015  
S&P Target Date 2040 Index | Average Annual Return, Label [Optional Text] S&P Target Date 2040 Index        
S&P Target Date 2040 Index | Average Annual Return, Percent   12.87% 8.27% 8.86% 8.19%
S&P Target Date 2040 Index | Performance Inception Date       Dec. 04, 2015  
Lifecycle 2040 Fund Composite Index | Average Annual Return, Label [Optional Text] [1] Lifecycle 2040 Fund Composite Index        
Lifecycle 2040 Fund Composite Index | Average Annual Return, Percent   13.78% 8.67% 9.52% 8.69%
Lifecycle 2040 Fund Composite Index | Performance Inception Date       Dec. 04, 2015  
Class I | Average Annual Return, Percent   12.77% 8.07% 8.85%  
Class I | Performance Inception Date       Dec. 04, 2015  
Premier Class | Average Annual Return, Percent   12.63% 7.98%   8.17%
Class R6 | Average Annual Return, Percent   12.76% 8.17%   8.34%
Retirement Class | Average Annual Return, Percent   12.54% 7.89%   8.07%
Retirement Class | After Taxes on Distributions | Average Annual Return, Percent   11.81% 6.59%   6.69%
Retirement Class | After Taxes on Distributions and Sales | Average Annual Return, Percent   7.80% 5.92%   6.13%
[1]

As of the close of business on December 31, 2024, the Lifecycle 2040 Fund Composite Index consisted of: 51.2% Russell 3000® Index; 27.6% MSCI All Country World Index ex USA Investable Market Index; and 21.2% Bloomberg U.S. Aggregate Bond Index. The Fund’s composite benchmark, the components that make up a composite benchmark and the method of calculating a composite benchmark’s performance may vary over time.

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 Lifecycle 2040 Fund | Retirement Class  
Prospectus [Line Items]  
Year to Date Return, Label [Optional Text] The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was
Bar Chart, Year to Date Return 7.51%
Bar Chart, Year to Date Return, Date Jun. 30, 2025
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 18.70%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (19.23%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen Lifecycle 2045 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 the Retirement Class 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 the Retirement Class may vary from the other share classes. Below the bar chart are the best and worst returns of the Retirement Class 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 the Retirement, Class I, Premier and Class R6 classes over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2024, and how those returns compare to those of a broad-based securities market index and a composite index that represents the market sectors in which the Fund invests across the equity and fixed-income asset classes. 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 the Retirement Class shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for the Retirement Class shares.

The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund and certain Underlying Funds 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 indices listed below are unmanaged, and you cannot invest directly in an index. The returns for the indices 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 RETIREMENT CLASS SHARES (%)† Nuveen Lifecycle 2045 Fund
Bar Chart Footnotes [Text Block]

 The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was 7.97%.

Bar Chart Closing [Text Block]

Best quarter: 20.06%, for the quarter ended June 30, 2020. Worst quarter: -20.73%, for the quarter ended March 31, 2020.

Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2024 #
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 Lifecycle 2045 Fund
12 Months Ended 60 Months Ended 109 Months Ended 120 Months Ended
May 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index        
Russell 3000® Index | Average Annual Return, Percent   23.81% 13.86% 13.55% 12.55%
Russell 3000® Index | Performance Inception Date       Dec. 04, 2015  
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Label [Optional Text] Bloomberg U.S. Aggregate Bond Index        
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Percent   1.25% (0.33%) 1.41% 1.35%
Bloomberg U.S. Aggregate Bond Index | Performance Inception Date       Dec. 04, 2015  
S&P Target Date 2045 Index | Average Annual Return, Label [Optional Text] S&P Target Date 2045 Index        
S&P Target Date 2045 Index | Average Annual Return, Percent   13.58% 8.75% 9.24% 8.54%
S&P Target Date 2045 Index | Performance Inception Date       Dec. 04, 2015  
Lifecycle 2045 Fund Composite Index | Average Annual Return, Label [Optional Text] [1] Lifecycle 2045 Fund Composite Index        
Lifecycle 2045 Fund Composite Index | Average Annual Return, Percent   14.94% 9.42% 10.11% 9.22%
Lifecycle 2045 Fund Composite Index | Performance Inception Date       Dec. 04, 2015  
Class I | Average Annual Return, Percent   13.68% 8.78% 9.39%  
Class I | Performance Inception Date       Dec. 04, 2015  
Premier Class | Average Annual Return, Percent   13.61% 8.70%   8.65%
Class R6 | Average Annual Return, Percent   13.80% 8.86%   8.81%
Retirement Class | Average Annual Return, Percent   13.48% 8.59%   8.55%
Retirement Class | After Taxes on Distributions | Average Annual Return, Percent   12.42% 6.77%   7.01%
Retirement Class | After Taxes on Distributions and Sales | Average Annual Return, Percent   8.58% 6.38%   6.52%
[1]

As of the close of business on December 31, 2024, the Lifecycle 2045 Fund Composite Index consisted of: 56.2% Russell 3000® Index; 30.2% MSCI All Country World Index ex USA Investable Market Index; and 13.6% Bloomberg U.S. Aggregate Bond Index. The Fund’s composite benchmark, the components that make up a composite benchmark and the method of calculating a composite benchmark’s performance may vary over time.

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 Lifecycle 2045 Fund | Retirement Class  
Prospectus [Line Items]  
Year to Date Return, Label [Optional Text] The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was
Bar Chart, Year to Date Return 7.97%
Bar Chart, Year to Date Return, Date Jun. 30, 2025
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 20.06%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (20.73%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen Lifecycle 2050 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 the Retirement Class 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 the Retirement Class may vary from the other share classes. Below the bar chart are the best and worst returns of the Retirement Class 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 the Retirement, Class I, Premier and Class R6 classes over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2024, and how those returns compare to those of a broad-based securities market index and a composite index that represents the market sectors in which the Fund invests across the equity and fixed-income asset classes. 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 the Retirement Class shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for the Retirement Class shares.

The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund and certain Underlying Funds 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 indices listed below are unmanaged, and you cannot invest directly in an index. The returns for the indices 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 RETIREMENT CLASS SHARES (%)† Nuveen Lifecycle 2050 Fund
Bar Chart Footnotes [Text Block]

 The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was 8.19%.

Bar Chart Closing [Text Block]

Best quarter: 20.29%, for the quarter ended June 30, 2020. Worst quarter: -20.99%, for the quarter ended March 31, 2020.

Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2024 #
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 Lifecycle 2050 Fund
12 Months Ended 60 Months Ended 109 Months Ended 120 Months Ended
May 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index        
Russell 3000® Index | Average Annual Return, Percent   23.81% 13.86% 13.55% 12.55%
Russell 3000® Index | Performance Inception Date       Dec. 04, 2015  
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Label [Optional Text] Bloomberg U.S. Aggregate Bond Index        
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Percent   1.25% (0.33%) 1.41% 1.35%
Bloomberg U.S. Aggregate Bond Index | Performance Inception Date       Dec. 04, 2015  
S&P Target Date 2050 Index | Average Annual Return, Label [Optional Text] S&P Target Date 2050 Index        
S&P Target Date 2050 Index | Average Annual Return, Percent   14.30% 9.06% 9.49% 8.77%
S&P Target Date 2050 Index | Performance Inception Date       Dec. 04, 2015  
Lifecycle 2050 Fund Composite Index | Average Annual Return, Label [Optional Text] [1] Lifecycle 2050 Fund Composite Index        
Lifecycle 2050 Fund Composite Index | Average Annual Return, Percent   15.49% 9.67% 10.30% 9.39%
Lifecycle 2050 Fund Composite Index | Performance Inception Date       Dec. 04, 2015  
Class I | Average Annual Return, Percent   14.16% 9.02% 9.57%  
Class I | Performance Inception Date       Dec. 04, 2015  
Premier Class | Average Annual Return, Percent   14.16% 8.94%   8.81%
Class R6 | Average Annual Return, Percent   14.27% 9.09%   8.97%
Retirement Class | Average Annual Return, Percent   14.05% 8.83%   8.71%
Retirement Class | After Taxes on Distributions | Average Annual Return, Percent   13.08% 7.10%   7.23%
Retirement Class | After Taxes on Distributions and Sales | Average Annual Return, Percent   8.93% 6.59%   6.67%
[1]

As of the close of business on December 31, 2024, the Lifecycle 2050 Fund Composite Index consisted of: 58.6% Russell 3000® Index; 31.5% MSCI All Country World Index ex USA Investable Market Index; and 9.9% Bloomberg U.S. Aggregate Bond Index. The Fund’s composite benchmark, the components that make up a composite benchmark and the method of calculating a composite benchmark’s performance may vary over time.

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 Lifecycle 2050 Fund | Retirement Class  
Prospectus [Line Items]  
Year to Date Return, Label [Optional Text] The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was
Bar Chart, Year to Date Return 8.19%
Bar Chart, Year to Date Return, Date Jun. 30, 2025
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 20.29%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (20.99%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen Lifecycle 2055 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 the Retirement Class 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 the Retirement Class may vary from the other share classes. Below the bar chart are the best and worst returns of the Retirement Class 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 the Retirement, Class I, Premier and Class R6 classes over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2024, and how those returns compare to those of a broad-based securities market index and a composite index that represents the market sectors in which the Fund invests across the equity and fixed-income asset classes. 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 the Retirement Class shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for the Retirement Class shares.

The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund and certain Underlying Funds 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 indices listed below are unmanaged, and you cannot invest directly in an index. The returns for the indices 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 RETIREMENT CLASS SHARES (%)† Nuveen Lifecycle 2055 Fund
Bar Chart Footnotes [Text Block]

 The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was 8.32%.

Bar Chart Closing [Text Block]

Best quarter: 20.43%, for the quarter ended June 30, 2020. Worst quarter: -21.21%, for the quarter ended March 31, 2020.

Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2024 #
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 Lifecycle 2055 Fund
12 Months Ended 60 Months Ended 109 Months Ended 120 Months Ended
May 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index        
Russell 3000® Index | Average Annual Return, Percent   23.81% 13.86% 13.55% 12.55%
Russell 3000® Index | Performance Inception Date       Dec. 04, 2015  
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Label [Optional Text] Bloomberg U.S. Aggregate Bond Index        
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Percent   1.25% (0.33%) 1.41% 1.35%
Bloomberg U.S. Aggregate Bond Index | Performance Inception Date       Dec. 04, 2015  
S&P Target Date 2055 Index | Average Annual Return, Label [Optional Text] S&P Target Date 2055 Index        
S&P Target Date 2055 Index | Average Annual Return, Percent   14.32% 9.11% 9.57% 8.84%
S&P Target Date 2055 Index | Performance Inception Date       Dec. 04, 2015  
Lifecycle 2055 Fund Composite Index | Average Annual Return, Label [Optional Text] [1] Lifecycle 2055 Fund Composite Index        
Lifecycle 2055 Fund Composite Index | Average Annual Return, Percent   15.70% 9.79% 10.43% 9.51%
Lifecycle 2055 Fund Composite Index | Performance Inception Date       Dec. 04, 2015  
Class I | Average Annual Return, Percent   14.34% 9.13% 9.67%  
Class I | Performance Inception Date       Dec. 04, 2015  
Premier Class | Average Annual Return, Percent   14.28% 9.04%   8.90%
Class R6 | Average Annual Return, Percent   14.46% 9.19%   9.06%
Retirement Class | Average Annual Return, Percent   14.11% 8.91%   8.79%
Retirement Class | After Taxes on Distributions | Average Annual Return, Percent   13.12% 7.35%   7.45%
Retirement Class | After Taxes on Distributions and Sales | Average Annual Return, Percent   9.00% 6.69%   6.78%
[1]

As of the close of business on December 31, 2024, the Lifecycle 2055 Fund Composite Index consisted of: 59.4% Russell 3000® Index; 32.0% MSCI All Country World Index ex USA Investable Market Index; and 8.6% Bloomberg U.S. Aggregate Bond Index. The Fund’s composite benchmark, the components that make up a composite benchmark and the method of calculating a composite benchmark’s performance may vary over time.

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 Lifecycle 2055 Fund | Retirement Class  
Prospectus [Line Items]  
Year to Date Return, Label [Optional Text] The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was
Bar Chart, Year to Date Return 8.32%
Bar Chart, Year to Date Return, Date Jun. 30, 2025
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 20.43%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (21.21%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen Lifecycle 2060 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 the Retirement Class 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 the Retirement Class may vary from the other share classes. Below the bar chart are the best and worst returns of the Retirement Class 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 the Retirement, Class I, Premier and Class R6 classes over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2024, and how those returns compare to those of a broad-based securities market index and a composite index that represents the market sectors in which the Fund invests across the equity and fixed-income asset classes. 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 the Retirement Class shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for the Retirement Class shares.

The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund and certain Underlying Funds 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 indices listed below are unmanaged, and you cannot invest directly in an index. The returns for the indices 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 RETIREMENT CLASS SHARES (%)† Nuveen Lifecycle 2060 Fund
Bar Chart Footnotes [Text Block]

 The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was 8.34%.

Bar Chart Closing [Text Block]

Best quarter: 20.64%, for the quarter ended June 30, 2020. Worst quarter: -21.37%, for the quarter ended March 31, 2020.

Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2024 #
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 Lifecycle 2060 Fund
12 Months Ended 60 Months Ended 109 Months Ended 120 Months Ended
May 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index        
Russell 3000® Index | Average Annual Return, Percent   23.81% 13.86% 13.55% 12.55%
Russell 3000® Index | Performance Inception Date       Dec. 04, 2015  
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Label [Optional Text] Bloomberg U.S. Aggregate Bond Index        
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Percent   1.25% (0.33%) 1.41% 1.35%
Bloomberg U.S. Aggregate Bond Index | Performance Inception Date       Dec. 04, 2015  
S&P Target Date 2060 Index | Average Annual Return, Label [Optional Text] S&P Target Date 2060 Index        
S&P Target Date 2060 Index | Average Annual Return, Percent   14.44% 9.14% 9.65% 8.91%
S&P Target Date 2060 Index | Performance Inception Date       Dec. 04, 2015  
Lifecycle 2060 Fund Composite Index | Average Annual Return, Label [Optional Text] [1] Lifecycle 2060 Fund Composite Index        
Lifecycle 2060 Fund Composite Index | Average Annual Return, Percent   15.91% 9.92% 10.56% 9.62%
Lifecycle 2060 Fund Composite Index | Performance Inception Date       Dec. 04, 2015  
Class I | Average Annual Return, Percent   14.51% 9.24% 9.75%  
Class I | Performance Inception Date       Dec. 04, 2015  
Premier Class | Average Annual Return, Percent   14.44% 9.15%   8.99%
Class R6 | Average Annual Return, Percent   14.56% 9.31%   9.16%
Retirement Class | Average Annual Return, Percent   14.35% 9.04%   8.89%
Retirement Class | After Taxes on Distributions | Average Annual Return, Percent   13.52% 7.73%   7.68%
Retirement Class | After Taxes on Distributions and Sales | Average Annual Return, Percent   9.08% 6.85%   6.89%
[1]

As of the close of business on December 31, 2024, the Lifecycle 2060 Fund Composite Index consisted of: 60.2% Russell 3000® Index; 32.4% MSCI All Country World Index ex USA Investable Market Index; and 7.4% Bloomberg U.S. Aggregate Bond Index. The Fund’s composite benchmark, the components that make up a composite benchmark and the method of calculating a composite benchmark’s performance may vary over time.

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 Lifecycle 2060 Fund | Retirement Class  
Prospectus [Line Items]  
Year to Date Return, Label [Optional Text] The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was
Bar Chart, Year to Date Return 8.34%
Bar Chart, Year to Date Return, Date Jun. 30, 2025
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 20.64%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (21.37%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen Lifecycle 2065 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 the Retirement Class of the Fund, before taxes, in each full calendar year since inception of the Retirement Class. Because the expenses vary across share classes, the performance of the Retirement Class may vary from the other share classes. Below the bar chart are the best and worst returns of the Retirement Class 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 the Retirement, Class I, Premier and Class R6 classes over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2024, and how those returns compare to those of a broad-based securities market index and a composite index that represents the market sectors in which the Fund invests across the equity and fixed-income asset classes. 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 the Retirement Class shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for the Retirement Class shares.

The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund and certain Underlying Funds 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 indices listed below are unmanaged, and you cannot invest directly in an index. The returns for the indices 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 RETIREMENT CLASS SHARES (%)† Nuveen Lifecycle 2065 Fund
Bar Chart Footnotes [Text Block]

 The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was 8.35%.

Bar Chart Closing [Text Block]

Best quarter: 10.53%, for the quarter ended December 31, 2023. Worst quarter: -14.88%, for the quarter ended June 30, 2022.

Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2024 #
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 Lifecycle 2065 Fund
12 Months Ended 51 Months Ended
May 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index    
Russell 3000® Index | Average Annual Return, Percent   23.81% 15.06%
Russell 3000® Index | Performance Inception Date     Sep. 30, 2020
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Label [Optional Text] Bloomberg U.S. Aggregate Bond Index    
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Percent   1.25% (1.91%)
Bloomberg U.S. Aggregate Bond Index | Performance Inception Date     Sep. 30, 2020
S&P Target Date 2065+ Index | Average Annual Return, Label [Optional Text] S&P Target Date 2065+ Index    
S&P Target Date 2065+ Index | Average Annual Return, Percent   14.83% 11.12%
S&P Target Date 2065+ Index | Performance Inception Date     Sep. 30, 2020
Lifecycle 2065 Fund Composite Index | Average Annual Return, Label [Optional Text] [1] Lifecycle 2065 Fund Composite Index    
Lifecycle 2065 Fund Composite Index | Average Annual Return, Percent   16.11% 11.28%
Lifecycle 2065 Fund Composite Index | Performance Inception Date     Sep. 30, 2020
Class I | Average Annual Return, Percent   14.75% 10.38%
Class I | Performance Inception Date     Sep. 30, 2020
Premier Class | Average Annual Return, Percent   14.51% 10.30%
Premier Class | Performance Inception Date     Sep. 30, 2020
Class R6 | Average Annual Return, Percent   14.71% 10.52%
Class R6 | Performance Inception Date     Sep. 30, 2020
Retirement Class | Average Annual Return, Percent   14.48% 10.32%
Retirement Class | Performance Inception Date     Sep. 30, 2020
Retirement Class | After Taxes on Distributions | Average Annual Return, Percent   13.76% 9.26%
Retirement Class | After Taxes on Distributions | Performance Inception Date     Sep. 30, 2020
Retirement Class | After Taxes on Distributions and Sales | Average Annual Return, Percent   9.12% 7.89%
Retirement Class | After Taxes on Distributions and Sales | Performance Inception Date     Sep. 30, 2020
[1]

As of the close of business on December 31, 2024, the Lifecycle 2065 Fund Composite Index consisted of: 61.0% Russell 3000® Index; 32.9% MSCI All Country World Index ex USA Investable Market Index; and 6.1% Bloomberg U.S. Aggregate Bond Index. The Fund’s composite benchmark, the components that make up a composite benchmark and the method of calculating a composite benchmark’s performance may vary over time.

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 Lifecycle 2065 Fund | Retirement Class  
Prospectus [Line Items]  
Year to Date Return, Label [Optional Text] The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was
Bar Chart, Year to Date Return 8.35%
Bar Chart, Year to Date Return, Date Jun. 30, 2025
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 10.53%
Highest Quarterly Return, Date Dec. 31, 2023
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (14.88%)
Lowest Quarterly Return, Date Jun. 30, 2022
Nuveen Lifecycle 2070 Fund  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Past performance
Performance Narrative [Text Block]

Performance information is not available for the Fund for the most recently completed calendar year because the Fund is newly operational.

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 One Year or Less [Text] Performance information is not available for the Fund for the most recently completed calendar year because the Fund is newly operational.
Performance Availability Website Address [Text] www.nuveen.com/performance
Nuveen Lifecycle Index Retirement Income 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 the Retirement Class 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 the Retirement Class may vary from the other share classes. Below the bar chart are the best and worst returns of the Retirement Class 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 the Retirement, Class I, Premier and Class R6 classes over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2024, and how those returns compare to those of a broad-based securities market index and a

composite index based on the Fund’s target allocations. 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 the Retirement Class shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for the Retirement Class shares.

The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund and certain Underlying Funds 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 indices listed below are unmanaged, and you cannot invest directly in an index. The returns for the indices 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 RETIREMENT CLASS SHARES (%)† Nuveen Lifecycle Index Retirement Income Fund
Bar Chart Footnotes [Text Block]

 The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was 6.43%.

Bar Chart Closing [Text Block]

Best quarter: 9.55%, for the quarter ended June 30, 2020. Worst quarter: -8.51%, for the quarter ended June 30, 2022.

Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2024 #
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 Lifecycle Index Retirement Income Fund
12 Months Ended 60 Months Ended 109 Months Ended 120 Months Ended
May 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index        
Russell 3000® Index | Average Annual Return, Percent   23.81% 13.86% 13.55% 12.55%
Russell 3000® Index | Performance Inception Date       Dec. 04, 2015  
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Label [Optional Text] Bloomberg U.S. Aggregate Bond Index        
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Percent   1.25% (0.33%) 1.41% 1.35%
Bloomberg U.S. Aggregate Bond Index | Performance Inception Date       Dec. 04, 2015  
S&P Target Date Retirement Income Index | Average Annual Return, Label [Optional Text] S&P Target Date Retirement Income Index        
S&P Target Date Retirement Income Index | Average Annual Return, Percent   6.54% 3.62% 4.50% 4.14%
S&P Target Date Retirement Income Index | Performance Inception Date       Dec. 04, 2015  
Lifecycle Index Retirement Income Fund Composite Index | Average Annual Return, Label [Optional Text] [1] Lifecycle Index Retirement Income Fund Composite Index        
Lifecycle Index Retirement Income Fund Composite Index | Average Annual Return, Percent   7.89% 4.70% 5.58% 5.15%
Lifecycle Index Retirement Income Fund Composite Index | Performance Inception Date       Dec. 04, 2015  
Class I | Average Annual Return, Percent   7.75% 4.52% 5.41%  
Class I | Performance Inception Date       Dec. 04, 2015  
Premier Class | Average Annual Return, Percent   7.71% 4.47%   4.92%
Class R6 | Average Annual Return, Percent   7.86% 4.63%   5.08%
Retirement Class | Average Annual Return, Percent   7.61% 4.36%   4.82%
Retirement Class | After Taxes on Distributions | Average Annual Return, Percent   5.93% 3.26%   3.89%
Retirement Class | After Taxes on Distributions and Sales | Average Annual Return, Percent   4.93% 3.04%   3.49%
[1]

As of the close of business on December 31, 2024, the Lifecycle Index Retirement Income Fund Composite Index consisted of: 40.0% Bloomberg U.S. Aggregate Bond Index; 26.0% Russell 3000® Index; 14.0% MSCI EAFE + Emerging Markets Index; 10.0% Bloomberg U.S. 1–3 Year Government/Credit Bond Index; and 10.0% Bloomberg U.S. Treasury Inflation Protected Securities (TIPS) 1–10 Year Index. The Fund’s composite benchmark, the components that make up a composite benchmark and the method of calculating a composite benchmark’s performance may vary over time.

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 Lifecycle Index Retirement Income Fund | Retirement Class  
Prospectus [Line Items]  
Year to Date Return, Label [Optional Text] The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was
Bar Chart, Year to Date Return 6.43%
Bar Chart, Year to Date Return, Date Jun. 30, 2025
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 9.55%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (8.51%)
Lowest Quarterly Return, Date Jun. 30, 2022
Nuveen Lifecycle Index 2010 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 the Retirement Class 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 the Retirement Class may vary from the other share classes. Below the bar chart are the best and

worst returns of the Retirement Class 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 the Retirement, Class I, Premier and Class R6 classes over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2024, and how those returns compare to those of a broad-based securities market index and a composite index based on the Fund’s target allocations. 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 the Retirement Class shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for the Retirement Class shares.

The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund and certain Underlying Funds 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 indices listed below are unmanaged, and you cannot invest directly in an index. The returns for the indices 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 RETIREMENT CLASS SHARES (%)† Nuveen Lifecycle Index 2010 Fund
Bar Chart Footnotes [Text Block]

 The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was 6.08%.

Bar Chart Closing [Text Block]

Best quarter: 9.54%, for the quarter ended June 30, 2020. Worst quarter: -8.21%, for the quarter ended June 30, 2022.

Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2024 #
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 Lifecycle Index 2010 Fund
12 Months Ended 60 Months Ended 109 Months Ended 120 Months Ended
May 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index        
Russell 3000® Index | Average Annual Return, Percent   23.81% 13.86% 13.55% 12.55%
Russell 3000® Index | Performance Inception Date       Dec. 04, 2015  
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Label [Optional Text] Bloomberg U.S. Aggregate Bond Index        
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Percent   1.25% (0.33%) 1.41% 1.35%
Bloomberg U.S. Aggregate Bond Index | Performance Inception Date       Dec. 04, 2015  
S&P Target Date 2010 Index | Average Annual Return, Label [Optional Text] S&P Target Date 2010 Index        
S&P Target Date 2010 Index | Average Annual Return, Percent   6.74% 4.17% 5.04% 4.66%
S&P Target Date 2010 Index | Performance Inception Date       Dec. 04, 2015  
Lifecycle Index 2010 Fund Composite Index | Average Annual Return, Label [Optional Text] [1] Lifecycle Index 2010 Fund Composite Index        
Lifecycle Index 2010 Fund Composite Index | Average Annual Return, Percent   7.43% 4.51% 5.57% 5.15%
Lifecycle Index 2010 Fund Composite Index | Performance Inception Date       Dec. 04, 2015  
Class I | Average Annual Return, Percent   7.28% 4.36% 5.41%  
Class I | Performance Inception Date       Dec. 04, 2015  
Premier Class | Average Annual Return, Percent   7.20% 4.29%   4.91%
Class R6 | Average Annual Return, Percent   7.40% 4.45%   5.07%
Retirement Class | Average Annual Return, Percent   7.15% 4.19%   4.81%
Retirement Class | After Taxes on Distributions | Average Annual Return, Percent   5.23% 2.96%   3.82%
Retirement Class | After Taxes on Distributions and Sales | Average Annual Return, Percent   4.92% 2.91%   3.48%
[1]

As of the close of business on December 31, 2024, the Lifecycle Index 2010 Fund Composite Index consisted of: 40.0% Bloomberg U.S. Aggregate Bond Index; 23.1% Russell 3000® Index; 12.4% MSCI EAFE+Emerging Markets Index; 14.5% Bloomberg U.S. 1-3 Year Government/Credit Bond Index; and 10.0% Bloomberg U.S. Treasury Inflation Protected Securities (TIPS) 1-10 Year Index. The Fund’s composite benchmark, the components that make up a composite benchmark and the method of calculating a composite benchmark’s performance may vary over time.

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 Lifecycle Index 2010 Fund | Retirement Class  
Prospectus [Line Items]  
Year to Date Return, Label [Optional Text] The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was
Bar Chart, Year to Date Return 6.08%
Bar Chart, Year to Date Return, Date Jun. 30, 2025
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 9.54%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (8.21%)
Lowest Quarterly Return, Date Jun. 30, 2022
Nuveen Lifecycle Index 2015 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 the Retirement Class 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 the Retirement Class may vary from the other share classes. Below the bar chart are the best and

worst returns of the Retirement Class 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 the Retirement, Class I, Premier and Class R6 classes over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2024, and how those returns compare to those of a broad-based securities market index and a composite index based on the Fund’s target allocations. 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 the Retirement Class shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for the Retirement Class shares.

The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund and certain Underlying Funds 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 indices listed below are unmanaged, and you cannot invest directly in an index. The returns for the indices 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 RETIREMENT CLASS SHARES (%)† Nuveen Lifecycle Index 2015 Fund
Bar Chart Footnotes [Text Block]

 The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was 6.47%.

Bar Chart Closing [Text Block]

Best quarter: 10.46%, for the quarter ended June 30, 2020. Worst quarter: -8.91%, for the quarter ended June 30, 2022.

Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2024 #
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 Lifecycle Index 2015 Fund
12 Months Ended 60 Months Ended 109 Months Ended 120 Months Ended
May 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index        
Russell 3000® Index | Average Annual Return, Percent   23.81% 13.86% 13.55% 12.55%
Russell 3000® Index | Performance Inception Date       Dec. 04, 2015  
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Label [Optional Text] Bloomberg U.S. Aggregate Bond Index        
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Percent   1.25% (0.33%) 1.41% 1.35%
Bloomberg U.S. Aggregate Bond Index | Performance Inception Date       Dec. 04, 2015  
S&P Target Date 2015 Index | Average Annual Return, Label [Optional Text] S&P Target Date 2015 Index        
S&P Target Date 2015 Index | Average Annual Return, Percent   7.25% 4.56% 5.51% 5.11%
S&P Target Date 2015 Index | Performance Inception Date       Dec. 04, 2015  
Lifecycle Index 2015 Fund Composite Index | Average Annual Return, Label [Optional Text] [1] Lifecycle Index 2015 Fund Composite Index        
Lifecycle Index 2015 Fund Composite Index | Average Annual Return, Percent   8.06% 4.94% 6.01% 5.55%
Lifecycle Index 2015 Fund Composite Index | Performance Inception Date       Dec. 04, 2015  
Class I | Average Annual Return, Percent   7.94% 4.78% 5.85%  
Class I | Performance Inception Date       Dec. 04, 2015  
Premier Class | Average Annual Return, Percent   7.94% 4.73%   5.33%
Class R6 | Average Annual Return, Percent   8.06% 4.89%   5.49%
Retirement Class | Average Annual Return, Percent   7.78% 4.62%   5.22%
Retirement Class | After Taxes on Distributions | Average Annual Return, Percent   5.57% 3.29%   4.18%
Retirement Class | After Taxes on Distributions and Sales | Average Annual Return, Percent   5.55% 3.27%   3.83%
[1]

As of the close of business on December 31, 2024, the Lifecycle Index 2015 Fund Composite Index consisted of: 39.9% Bloomberg U.S. Aggregate Bond Index; 26.3% Russell 3000® Index; 14.2% MSCI EAFE + Emerging Markets Index; 9.8% Bloomberg U.S. 1-3 Year Government/Credit Bond Index; and 9.8% Bloomberg U.S. Treasury Inflation Protected Securities (TIPS) 1-10 Year Index. The Fund’s composite benchmark, the components that make up a composite benchmark and the method of calculating a composite benchmark’s performance may vary over time.

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 Lifecycle Index 2015 Fund | Retirement Class  
Prospectus [Line Items]  
Year to Date Return, Label [Optional Text] The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was
Bar Chart, Year to Date Return 6.47%
Bar Chart, Year to Date Return, Date Jun. 30, 2025
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 10.46%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (8.91%)
Lowest Quarterly Return, Date Jun. 30, 2022
Nuveen Lifecycle Index 2020 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 the Retirement Class 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 the Retirement Class may vary from the other share classes. Below the bar chart are the best and

worst returns of the Retirement Class 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 the Retirement, Class I, Premier and Class R6 classes over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2024, and how those returns compare to those of a broad-based securities market index and a composite index based on the Fund’s target allocations. 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 the Retirement Class shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for the Retirement Class shares.

The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund and certain Underlying Funds 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 indices listed below are unmanaged, and you cannot invest directly in an index. The returns for the indices 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 RETIREMENT CLASS SHARES (%)† Nuveen Lifecycle Index 2020 Fund
Bar Chart Footnotes [Text Block]

 The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was 6.74%.

Bar Chart Closing [Text Block]

Best quarter: 11.40%, for the quarter ended June 30, 2020. Worst quarter: -10.08%, for the quarter ended March 31, 2020.

Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2024 #
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 Lifecycle Index 2020 Fund
12 Months Ended 60 Months Ended 109 Months Ended 120 Months Ended
May 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index        
Russell 3000® Index | Average Annual Return, Percent   23.81% 13.86% 13.55% 12.55%
Russell 3000® Index | Performance Inception Date       Dec. 04, 2015  
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Label [Optional Text] Bloomberg U.S. Aggregate Bond Index        
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Percent   1.25% (0.33%) 1.41% 1.35%
Bloomberg U.S. Aggregate Bond Index | Performance Inception Date       Dec. 04, 2015  
S&P Target Date 2020 Index | Average Annual Return, Label [Optional Text] S&P Target Date 2020 Index        
S&P Target Date 2020 Index | Average Annual Return, Percent   8.09% 4.88% 5.94% 5.52%
S&P Target Date 2020 Index | Performance Inception Date       Dec. 04, 2015  
Lifecycle Index 2020 Fund Composite Index | Average Annual Return, Label [Optional Text] [1] Lifecycle Index 2020 Fund Composite Index        
Lifecycle Index 2020 Fund Composite Index | Average Annual Return, Percent   8.74% 5.37% 6.51% 6.00%
Lifecycle Index 2020 Fund Composite Index | Performance Inception Date       Dec. 04, 2015  
Class I | Average Annual Return, Percent   8.59% 5.20% 6.31%  
Class I | Performance Inception Date       Dec. 04, 2015  
Premier Class | Average Annual Return, Percent   8.53% 5.14%   5.77%
Class R6 | Average Annual Return, Percent   8.71% 5.29%   5.93%
Retirement Class | Average Annual Return, Percent   8.44% 5.04%   5.66%
Retirement Class | After Taxes on Distributions | Average Annual Return, Percent   6.48% 3.83%   4.71%
Retirement Class | After Taxes on Distributions and Sales | Average Annual Return, Percent   5.82% 3.63%   4.23%
[1]

As of the close of business on December 31, 2024, the Lifecycle Index 2020 Fund Composite Index consisted of: 38.9% Bloomberg U.S. Aggregate Bond Index; 29.6% Russell 3000® Index; 15.9% MSCI EAFE + Emerging Markets Index; 7.8% Bloomberg U.S. 1-3 Year Government/Credit Bond Index; and 7.8% Bloomberg U.S. Treasury Inflation Protected Securities (TIPS) 1-10 Year Index. The Fund’s composite benchmark, the components that make up a composite benchmark and the method of calculating a composite benchmark’s performance may vary over time.

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 Lifecycle Index 2020 Fund | Retirement Class  
Prospectus [Line Items]  
Year to Date Return, Label [Optional Text] The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was
Bar Chart, Year to Date Return 6.74%
Bar Chart, Year to Date Return, Date Jun. 30, 2025
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 11.40%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (10.08%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen Lifecycle Index 2025 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 the Retirement Class 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 the Retirement Class may vary from the other share classes. Below the bar chart are the best and

worst returns of the Retirement Class 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 the Retirement, Class I, Premier and Class R6 classes over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2024, and how those returns compare to those of a broad-based securities market index and a composite index based on the Fund’s target allocations. 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 the Retirement Class shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for the Retirement Class shares.

The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund and certain Underlying Funds 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 indices listed below are unmanaged, and you cannot invest directly in an index. The returns for the indices 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 RETIREMENT CLASS SHARES (%)† Nuveen Lifecycle Index 2025 Fund
Bar Chart Footnotes [Text Block]

 The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was 7.09%.

Bar Chart Closing [Text Block]

Best quarter: 12.84%, for the quarter ended June 30, 2020. Worst quarter: -11.94%, for the quarter ended March 31, 2020.

Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2024 #
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 Lifecycle Index 2025 Fund
12 Months Ended 60 Months Ended 109 Months Ended 120 Months Ended
May 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index        
Russell 3000® Index | Average Annual Return, Percent   23.81% 13.86% 13.55% 12.55%
Russell 3000® Index | Performance Inception Date       Dec. 04, 2015  
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Label [Optional Text] Bloomberg U.S. Aggregate Bond Index        
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Percent   1.25% (0.33%) 1.41% 1.35%
Bloomberg U.S. Aggregate Bond Index | Performance Inception Date       Dec. 04, 2015  
S&P Target Date 2025 Index | Average Annual Return, Label [Optional Text] S&P Target Date 2025 Index        
S&P Target Date 2025 Index | Average Annual Return, Percent   8.44% 5.55% 6.62% 6.14%
S&P Target Date 2025 Index | Performance Inception Date       Dec. 04, 2015  
Lifecycle Index 2025 Fund Composite Index | Average Annual Return, Label [Optional Text] [1] Lifecycle Index 2025 Fund Composite Index        
Lifecycle Index 2025 Fund Composite Index | Average Annual Return, Percent   9.54% 5.99% 7.16% 6.60%
Lifecycle Index 2025 Fund Composite Index | Performance Inception Date       Dec. 04, 2015  
Class I | Average Annual Return, Percent   9.38% 5.81% 6.96%  
Class I | Performance Inception Date       Dec. 04, 2015  
Premier Class | Average Annual Return, Percent   9.31% 5.78%   6.37%
Class R6 | Average Annual Return, Percent   9.48% 5.93%   6.53%
Retirement Class | Average Annual Return, Percent   9.18% 5.66%   6.26%
Retirement Class | After Taxes on Distributions | Average Annual Return, Percent   7.50% 4.65%   5.41%
Retirement Class | After Taxes on Distributions and Sales | Average Annual Return, Percent   6.10% 4.15%   4.75%
[1]

As of the close of business on December 31, 2024, the Lifecycle Index 2025 Fund Composite Index consisted of: 37.6% Bloomberg U.S. Aggregate Bond Index; 33.0% Russell 3000® Index; 17.8% MSCI EAFE + Emerging Markets Index; 5.8% Bloomberg U.S. 1-3 Year Government/Credit Bond Index; and 5.8% Bloomberg U.S. Treasury Inflation Protected Securities (TIPS) 1-10 Year Index. The Fund’s composite benchmark, the components that make up a composite benchmark and the method of calculating a composite benchmark’s performance may vary over time.

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 Lifecycle Index 2025 Fund | Retirement Class  
Prospectus [Line Items]  
Year to Date Return, Label [Optional Text] The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was
Bar Chart, Year to Date Return 7.09%
Bar Chart, Year to Date Return, Date Jun. 30, 2025
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 12.84%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (11.94%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen Lifecycle Index 2030 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 the Retirement Class 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 the Retirement Class may vary from the other share classes. Below the bar chart are the best and

worst returns of the Retirement Class 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 the Retirement, Class I, Premier and Class R6 classes over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2024, and how those returns compare to those of a broad-based securities market index and a composite index based on the Fund’s target allocations. 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 the Retirement Class shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for the Retirement Class shares.

The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund and certain Underlying Funds 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 indices listed below are unmanaged, and you cannot invest directly in an index. The returns for the indices 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 RETIREMENT CLASS SHARES (%)† Nuveen Lifecycle Index 2030 Fund
Bar Chart Footnotes [Text Block]

 The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was 7.61%.

Bar Chart Closing [Text Block]

Best quarter: 14.26%, for the quarter ended June 30, 2020. Worst quarter: -13.84%, for the quarter ended March 31, 2020.

Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2024 #
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 Lifecycle Index 2030 Fund
12 Months Ended 60 Months Ended 109 Months Ended 120 Months Ended
May 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index        
Russell 3000® Index | Average Annual Return, Percent   23.81% 13.86% 13.55% 12.55%
Russell 3000® Index | Performance Inception Date       Dec. 04, 2015  
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Label [Optional Text] Bloomberg U.S. Aggregate Bond Index        
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Percent   1.25% (0.33%) 1.41% 1.35%
Bloomberg U.S. Aggregate Bond Index | Performance Inception Date       Dec. 04, 2015  
S&P Target Date 2030 Index | Average Annual Return, Label [Optional Text] S&P Target Date 2030 Index        
S&P Target Date 2030 Index | Average Annual Return, Percent   9.90% 6.46% 7.41% 6.87%
S&P Target Date 2030 Index | Performance Inception Date       Dec. 04, 2015  
Lifecycle Index 2030 Fund Composite Index | Average Annual Return, Label [Optional Text] [1] Lifecycle Index 2030 Fund Composite Index        
Lifecycle Index 2030 Fund Composite Index | Average Annual Return, Percent   10.70% 6.74% 7.88% 7.25%
Lifecycle Index 2030 Fund Composite Index | Performance Inception Date       Dec. 04, 2015  
Class I | Average Annual Return, Percent   10.51% 6.56% 7.68%  
Class I | Performance Inception Date       Dec. 04, 2015  
Premier Class | Average Annual Return, Percent   10.46% 6.51%   7.02%
Class R6 | Average Annual Return, Percent   10.60% 6.66%   7.19%
Retirement Class | Average Annual Return, Percent   10.29% 6.40%   6.92%
Retirement Class | After Taxes on Distributions | Average Annual Return, Percent   9.17% 5.56%   6.16%
Retirement Class | After Taxes on Distributions and Sales | Average Annual Return, Percent   6.44% 4.76%   5.32%
[1]

As of the close of business on December 31, 2024, the Lifecycle Index 2030 Fund Composite Index consisted of: 38.2% Russell 3000® Index; 33.6% Bloomberg U.S. Aggregate Bond Index; 20.6% MSCI EAFE + Emerging Markets Index; 3.8% Bloomberg U.S. 1-3 Year Government/Credit Bond Index; and 3.8% Bloomberg U.S. Treasury Inflation Protected Securities (TIPS) 1-10 Year Index. The Fund’s composite benchmark, the components that make up a composite benchmark and the method of calculating a composite benchmark’s performance may vary over time.

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 Lifecycle Index 2030 Fund | Retirement Class  
Prospectus [Line Items]  
Year to Date Return, Label [Optional Text] The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was
Bar Chart, Year to Date Return 7.61%
Bar Chart, Year to Date Return, Date Jun. 30, 2025
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 14.26%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (13.84%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen Lifecycle Index 2035 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 the Retirement Class 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 the Retirement Class may vary from the other share classes. Below the bar chart are the best and

worst returns of the Retirement Class 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 the Retirement, Class I, Premier and Class R6 classes over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2024, and how those returns compare to those of a broad-based securities market index and a composite index based on the Fund’s target allocations. 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 the Retirement Class shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for the Retirement Class shares.

The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund and certain Underlying Funds 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 indices listed below are unmanaged, and you cannot invest directly in an index. The returns for the indices 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 RETIREMENT CLASS SHARES (%)† Nuveen Lifecycle Index 2035 Fund
Bar Chart Footnotes [Text Block]

 The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was 8.08%.

Bar Chart Closing [Text Block]

Best quarter: 15.71%, for the quarter ended June 30, 2020. Worst quarter: -15.71%, for the quarter ended March 31, 2020.

Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2024 #
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 Lifecycle Index 2035 Fund
12 Months Ended 60 Months Ended 109 Months Ended 120 Months Ended
May 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index        
Russell 3000® Index | Average Annual Return, Percent   23.81% 13.86% 13.55% 12.55%
Russell 3000® Index | Performance Inception Date       Dec. 04, 2015  
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Label [Optional Text] Bloomberg U.S. Aggregate Bond Index        
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Percent   1.25% (0.33%) 1.41% 1.35%
Bloomberg U.S. Aggregate Bond Index | Performance Inception Date       Dec. 04, 2015  
S&P Target Date 2035 Index | Average Annual Return, Label [Optional Text] S&P Target Date 2035 Index        
S&P Target Date 2035 Index | Average Annual Return, Percent   11.38% 7.44% 8.21% 7.60%
S&P Target Date 2035 Index | Performance Inception Date       Dec. 04, 2015  
Lifecycle Index 2035 Fund Composite Index | Average Annual Return, Label [Optional Text] [1] Lifecycle Index 2035 Fund Composite Index        
Lifecycle Index 2035 Fund Composite Index | Average Annual Return, Percent   12.03% 7.60% 8.65% 7.94%
Lifecycle Index 2035 Fund Composite Index | Performance Inception Date       Dec. 04, 2015  
Class I | Average Annual Return, Percent   11.75% 7.39% 8.45%  
Class I | Performance Inception Date       Dec. 04, 2015  
Premier Class | Average Annual Return, Percent   11.67% 7.34%   7.70%
Class R6 | Average Annual Return, Percent   11.84% 7.50%   7.87%
Retirement Class | Average Annual Return, Percent   11.60% 7.23%   7.60%
Retirement Class | After Taxes on Distributions | Average Annual Return, Percent   10.63% 6.49%   6.90%
Retirement Class | After Taxes on Distributions and Sales | Average Annual Return, Percent   7.16% 5.47%   5.93%
[1]

As of the close of business on December 31, 2024, the Lifecycle Index 2035 Fund Composite Index consisted of: 43.7% Russell 3000® Index; 29.2% Bloomberg U.S. Aggregate Bond Index; 23.5% MSCI EAFE + Emerging Markets Index; 1.8% Bloomberg U.S. 1-3 Year Government/Credit Bond Index; and 1.8% Bloomberg U.S. Treasury Inflation Protected Securities (TIPS) 1-10 Year Index. The Fund’s composite benchmark, the components that make up a composite benchmark and the method of calculating a composite benchmark’s performance may vary over time.

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 Lifecycle Index 2035 Fund | Retirement Class  
Prospectus [Line Items]  
Year to Date Return, Label [Optional Text] The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was
Bar Chart, Year to Date Return 8.08%
Bar Chart, Year to Date Return, Date Jun. 30, 2025
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 15.71%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (15.71%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen Lifecycle Index 2040 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 the Retirement Class 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 the Retirement Class may vary from the other share classes. Below the bar chart are the best and worst returns of the Retirement Class 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 the Retirement, Class I, Premier and Class R6 classes over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2024, and how those returns compare to those of a broad-based securities market index and a composite index based on the Fund’s target allocations. 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 the Retirement Class shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for the Retirement Class shares.

The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund and certain Underlying Funds 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 indices listed below are unmanaged, and you cannot invest directly in an index. The returns for the indices 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 RETIREMENT CLASS SHARES (%)† Nuveen Lifecycle Index 2040 Fund
Bar Chart Footnotes [Text Block]

 The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was 8.83%.

Bar Chart Closing [Text Block]

Best quarter: 17.16%, for the quarter ended June 30, 2020. Worst quarter: -17.58%, for the quarter ended March 31, 2020.

Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2024 #
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 Lifecycle Index 2040 Fund
12 Months Ended 60 Months Ended 109 Months Ended 120 Months Ended
May 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index        
Russell 3000® Index | Average Annual Return, Percent   23.81% 13.86% 13.55% 12.55%
Russell 3000® Index | Performance Inception Date       Dec. 04, 2015  
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Label [Optional Text] Bloomberg U.S. Aggregate Bond Index        
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Percent   1.25% (0.33%) 1.41% 1.35%
Bloomberg U.S. Aggregate Bond Index | Performance Inception Date       Dec. 04, 2015  
S&P Target Date 2040 Index | Average Annual Return, Label [Optional Text] S&P Target Date 2040 Index        
S&P Target Date 2040 Index | Average Annual Return, Percent   12.87% 8.27% 8.86% 8.19%
S&P Target Date 2040 Index | Performance Inception Date       Dec. 04, 2015  
Lifecycle Index 2040 Fund Composite Index | Average Annual Return, Label [Optional Text] [1] Lifecycle Index 2040 Fund Composite Index        
Lifecycle Index 2040 Fund Composite Index | Average Annual Return, Percent   13.73% 8.59% 9.47% 8.68%
Lifecycle Index 2040 Fund Composite Index | Performance Inception Date       Dec. 04, 2015  
Class I | Average Annual Return, Percent   13.43% 8.39% 9.27%  
Class I | Performance Inception Date       Dec. 04, 2015  
Premier Class | Average Annual Return, Percent   13.36% 8.33%   8.45%
Class R6 | Average Annual Return, Percent   13.52% 8.50%   8.61%
Retirement Class | Average Annual Return, Percent   13.26% 8.23%   8.34%
Retirement Class | After Taxes on Distributions | Average Annual Return, Percent   12.51% 7.55%   7.69%
Retirement Class | After Taxes on Distributions and Sales | Average Annual Return, Percent   8.12% 6.30%   6.59%
[1]

As of the close of business on December 31, 2024, the Lifecycle Index 2040 Fund Composite Index consisted of: 51.2% Russell 3000® Index; 27.6% MSCI EAFE + Emerging Markets Index; and 21.2% Bloomberg U.S. Aggregate Bond Index. The Fund’s composite benchmark, the components that make up a composite benchmark and the method of calculating a composite benchmark’s performance may vary over time.

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 Lifecycle Index 2040 Fund | Retirement Class  
Prospectus [Line Items]  
Year to Date Return, Label [Optional Text] The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was
Bar Chart, Year to Date Return 8.83%
Bar Chart, Year to Date Return, Date Jun. 30, 2025
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 17.16%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (17.58%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen Lifecycle Index 2045 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 the Retirement Class 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 the Retirement Class may vary from the other share classes. Below the bar chart are the best and worst returns of the Retirement Class 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 the Retirement, Class I, Premier and Class R6 classes over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2024, and how those returns compare to those of a broad-based securities market index and a composite index based on the Fund’s target allocations. 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 the Retirement Class shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for the Retirement Class shares.

The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund and certain Underlying Funds 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 indices listed below are unmanaged, and you cannot invest directly in an index. The returns for the indices 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 RETIREMENT CLASS SHARES (%)† Nuveen Lifecycle Index 2045 Fund
Bar Chart Footnotes [Text Block]

 The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was 9.29%.

Bar Chart Closing [Text Block]

Best quarter: 18.55%, for the quarter ended June 30, 2020. Worst quarter: -19.36%, for the quarter ended March 31, 2020.

Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2024 #
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 Lifecycle Index 2045 Fund
12 Months Ended 60 Months Ended 109 Months Ended 120 Months Ended
May 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index        
Russell 3000® Index | Average Annual Return, Percent   23.81% 13.86% 13.55% 12.55%
Russell 3000® Index | Performance Inception Date       Dec. 04, 2015  
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Label [Optional Text] Bloomberg U.S. Aggregate Bond Index        
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Percent   1.25% (0.33%) 1.41% 1.35%
Bloomberg U.S. Aggregate Bond Index | Performance Inception Date       Dec. 04, 2015  
S&P Target Date 2045 Index | Average Annual Return, Label [Optional Text] S&P Target Date 2045 Index        
S&P Target Date 2045 Index | Average Annual Return, Percent   13.58% 8.75% 9.24% 8.54%
S&P Target Date 2045 Index | Performance Inception Date       Dec. 04, 2015  
Lifecycle Index 2045 Fund Composite Index | Average Annual Return, Label [Optional Text] [1] Lifecycle Index 2045 Fund Composite Index        
Lifecycle Index 2045 Fund Composite Index | Average Annual Return, Percent   14.87% 9.33% 10.05% 9.21%
Lifecycle Index 2045 Fund Composite Index | Performance Inception Date       Dec. 04, 2015  
Class I | Average Annual Return, Percent   14.55% 9.12% 9.83%  
Class I | Performance Inception Date       Dec. 04, 2015  
Premier Class | Average Annual Return, Percent   14.48% 9.07%   8.97%
Class R6 | Average Annual Return, Percent   14.63% 9.23%   9.13%
Retirement Class | Average Annual Return, Percent   14.35% 8.95%   8.86%
Retirement Class | After Taxes on Distributions | Average Annual Return, Percent   13.68% 8.36%   8.26%
Retirement Class | After Taxes on Distributions and Sales | Average Annual Return, Percent   8.78% 6.94%   7.06%
[1]

As of the close of business on December 31, 2024, the Lifecycle Index 2045 Fund Composite Index consisted of: 56.2% Russell 3000® Index; 30.2% MSCI EAFE + Emerging Markets Index; and 13.6% Bloomberg U.S. Aggregate Bond Index. The Fund’s composite benchmark, the components that make up a composite benchmark and the method of calculating a composite benchmark’s performance may vary over time.

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 Lifecycle Index 2045 Fund | Retirement Class  
Prospectus [Line Items]  
Year to Date Return, Label [Optional Text] The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was
Bar Chart, Year to Date Return 9.29%
Bar Chart, Year to Date Return, Date Jun. 30, 2025
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 18.55%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (19.36%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen Lifecycle Index 2050 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 the Retirement Class 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 the Retirement Class may vary from the other share classes. Below the bar chart are the best and worst returns of the Retirement Class 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 the Retirement, Class I, Premier and Class R6 classes over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2024, and how those returns compare to those of a broad-based securities market index and a composite index based on the Fund’s target allocations. 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 the Retirement Class shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for the Retirement Class shares.

The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund and certain Underlying Funds 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 indices listed below are unmanaged, and you cannot invest directly in an index. The returns for the indices 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 RETIREMENT CLASS SHARES (%)† Nuveen Lifecycle Index 2050 Fund
Bar Chart Footnotes [Text Block]

 The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was 9.57%.

Bar Chart Closing [Text Block]

Best quarter: 18.75%, for the quarter ended June 30, 2020. Worst quarter: -19.60%, for the quarter ended March 31, 2020.

Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2024 #
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 Lifecycle Index 2050 Fund
12 Months Ended 60 Months Ended 109 Months Ended 120 Months Ended
May 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index        
Russell 3000® Index | Average Annual Return, Percent   23.81% 13.86% 13.55% 12.55%
Russell 3000® Index | Performance Inception Date       Dec. 04, 2015  
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Label [Optional Text] Bloomberg U.S. Aggregate Bond Index        
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Percent   1.25% (0.33%) 1.41% 1.35%
Bloomberg U.S. Aggregate Bond Index | Performance Inception Date       Dec. 04, 2015  
S&P Target Date 2050 Index | Average Annual Return, Label [Optional Text] S&P Target Date 2050 Index        
S&P Target Date 2050 Index | Average Annual Return, Percent   14.30% 9.06% 9.49% 8.77%
S&P Target Date 2050 Index | Performance Inception Date       Dec. 04, 2015  
Lifecycle Index 2050 Fund Composite Index | Average Annual Return, Label [Optional Text] [1] Lifecycle Index 2050 Fund Composite Index        
Lifecycle Index 2050 Fund Composite Index | Average Annual Return, Percent   15.42% 9.57% 10.25% 9.38%
Lifecycle Index 2050 Fund Composite Index | Performance Inception Date       Dec. 04, 2015  
Class I | Average Annual Return, Percent   15.06% 9.37% 10.03%  
Class I | Performance Inception Date       Dec. 04, 2015  
Premier Class | Average Annual Return, Percent   15.04% 9.31%   9.14%
Class R6 | Average Annual Return, Percent   15.18% 9.48%   9.31%
Retirement Class | Average Annual Return, Percent   14.88% 9.20%   9.04%
Retirement Class | After Taxes on Distributions | Average Annual Return, Percent   14.24% 8.64%   8.46%
Retirement Class | After Taxes on Distributions and Sales | Average Annual Return, Percent   9.10% 7.16%   7.22%
[1]

As of the close of business on December 31, 2024, the Lifecycle Index 2050 Fund Composite Index consisted of: 58.6% Russell 3000® Index; 31.5% MSCI EAFE + Emerging Markets Index; and 9.9% Bloomberg U.S. Aggregate Bond Index. The Fund’s composite benchmark, the components that make up a composite benchmark and the method of calculating a composite benchmark’s performance may vary over time.

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 Lifecycle Index 2050 Fund | Retirement Class  
Prospectus [Line Items]  
Year to Date Return, Label [Optional Text] The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was
Bar Chart, Year to Date Return 9.57%
Bar Chart, Year to Date Return, Date Jun. 30, 2025
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 18.75%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (19.60%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen Lifecycle Index 2055 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 the Retirement Class 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 the Retirement Class may vary from the other share classes. Below the bar chart are the best and worst returns of the Retirement Class 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 the Retirement, Class I, Premier and Class R6 classes over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2024, and how those returns compare to those of a broad-based securities market index and a composite index based on the Fund’s target allocations. 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 the Retirement Class shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for the Retirement Class shares.

The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund and certain Underlying Funds 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 indices listed below are unmanaged, and you cannot invest directly in an index. The returns for the indices 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 RETIREMENT CLASS SHARES (%)† Nuveen Lifecycle Index 2055 Fund
Bar Chart Footnotes [Text Block]

 The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was 9.63%.

Bar Chart Closing [Text Block]

Best quarter: 19.03%, for the quarter ended June 30, 2020. Worst quarter: -19.96%, for the quarter ended March 31, 2020.

Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2024 #
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 Lifecycle Index 2055 Fund
12 Months Ended 60 Months Ended 109 Months Ended 120 Months Ended
May 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index        
Russell 3000® Index | Average Annual Return, Percent   23.81% 13.86% 13.55% 12.55%
Russell 3000® Index | Performance Inception Date       Dec. 04, 2015  
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Label [Optional Text] Bloomberg U.S. Aggregate Bond Index        
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Percent   1.25% (0.33%) 1.41% 1.35%
Bloomberg U.S. Aggregate Bond Index | Performance Inception Date       Dec. 04, 2015  
S&P Target Date 2055 Index | Average Annual Return, Label [Optional Text] S&P Target Date 2055 Index        
S&P Target Date 2055 Index | Average Annual Return, Percent   14.32% 9.11% 9.57% 8.84%
S&P Target Date 2055 Index | Performance Inception Date       Dec. 04, 2015  
Lifecycle Index 2055 Fund Composite Index | Average Annual Return, Label [Optional Text] [1] Lifecycle Index 2055 Fund Composite Index        
Lifecycle Index 2055 Fund Composite Index | Average Annual Return, Percent   15.63% 9.70% 10.37% 9.49%
Lifecycle Index 2055 Fund Composite Index | Performance Inception Date       Dec. 04, 2015  
Class I | Average Annual Return, Percent   15.27% 9.48% 10.17%  
Class I | Performance Inception Date       Dec. 04, 2015  
Premier Class | Average Annual Return, Percent   15.21% 9.43%   9.25%
Class R6 | Average Annual Return, Percent   15.35% 9.58%   9.41%
Retirement Class | Average Annual Return, Percent   15.08% 9.31%   9.14%
Retirement Class | After Taxes on Distributions | Average Annual Return, Percent   14.48% 8.79%   8.59%
Retirement Class | After Taxes on Distributions and Sales | Average Annual Return, Percent   9.22% 7.27%   7.33%
[1]

As of the close of business on December 31, 2024, the Lifecycle Index 2055 Fund Composite Index consisted of: 59.4% Russell 3000® Index; 32.0% MSCI EAFE + Emerging Markets Index; and 8.6% Bloomberg U.S. Aggregate Bond Index. The Fund’s composite benchmark, the components that make up a composite benchmark and the method of calculating a composite benchmark’s performance may vary over time.

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 Lifecycle Index 2055 Fund | Retirement Class  
Prospectus [Line Items]  
Year to Date Return, Label [Optional Text] The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was
Bar Chart, Year to Date Return 9.63%
Bar Chart, Year to Date Return, Date Jun. 30, 2025
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 19.03%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (19.96%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen Lifecycle Index 2060 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 the Retirement Class 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 the Retirement Class may vary from the other share classes. Below the bar chart are the best and worst returns of the Retirement Class 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 the Retirement, Class I, Premier and Class R6 classes over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2024, and how those returns compare to those of a broad-based securities market index and a composite index based on the Fund’s target allocations. 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 the Retirement Class shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for the Retirement Class shares.

The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund and certain Underlying Funds 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 indices listed below are unmanaged, and you cannot invest directly in an index. The returns for the indices 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 RETIREMENT CLASS SHARES (%)† Nuveen Lifecycle Index 2060 Fund
Bar Chart Footnotes [Text Block]

 The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was 9.70%.

Bar Chart Closing [Text Block]

Best quarter: 19.18%, for the quarter ended June 30, 2020. Worst quarter: -20.13%, for the quarter ended March 31, 2020.

Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2024 #
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 Lifecycle Index 2060 Fund
12 Months Ended 60 Months Ended 109 Months Ended 120 Months Ended
May 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index        
Russell 3000® Index | Average Annual Return, Percent   23.81% 13.86% 13.55% 12.55%
Russell 3000® Index | Performance Inception Date       Dec. 04, 2015  
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Label [Optional Text] Bloomberg U.S. Aggregate Bond Index        
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Percent   1.25% (0.33%) 1.41% 1.35%
Bloomberg U.S. Aggregate Bond Index | Performance Inception Date       Dec. 04, 2015  
S&P Target Date 2060 Index | Average Annual Return, Label [Optional Text] S&P Target Date 2060 Index        
S&P Target Date 2060 Index | Average Annual Return, Percent   14.44% 9.14% 9.65% 8.91%
S&P Target Date 2060 Index | Performance Inception Date       Dec. 04, 2015  
Lifecycle Index 2060 Fund Composite Index | Average Annual Return, Label [Optional Text] [1] Lifecycle Index 2060 Fund Composite Index        
Lifecycle Index 2060 Fund Composite Index | Average Annual Return, Percent   15.84% 9.83% 10.50% 9.61%
Lifecycle Index 2060 Fund Composite Index | Performance Inception Date       Dec. 04, 2015  
Class I | Average Annual Return, Percent   15.50% 9.62% 10.30%  
Class I | Performance Inception Date       Dec. 04, 2015  
Premier Class | Average Annual Return, Percent   15.43% 9.56%   9.37%
Class R6 | Average Annual Return, Percent   15.59% 9.73%   9.53%
Retirement Class | Average Annual Return, Percent   15.29% 9.45%   9.26%
Retirement Class | After Taxes on Distributions | Average Annual Return, Percent   14.70% 9.02%   8.73%
Retirement Class | After Taxes on Distributions and Sales | Average Annual Return, Percent   9.35% 7.46%   7.46%
[1]

As of the close of business on December 31, 2024, the Lifecycle Index 2060 Fund Composite Index consisted of: 60.2% Russell 3000® Index; 32.4% MSCI EAFE + Emerging Markets Index; and 7.4% Bloomberg U.S. Aggregate Bond Index. The Fund’s composite benchmark, the components that make up a composite benchmark and the method of calculating a composite benchmark’s performance may vary over time.

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 Lifecycle Index 2060 Fund | Retirement Class  
Prospectus [Line Items]  
Year to Date Return, Label [Optional Text] The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was
Bar Chart, Year to Date Return 9.70%
Bar Chart, Year to Date Return, Date Jun. 30, 2025
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 (20.13%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen Lifecycle Index 2065 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 the Retirement Class of the Fund, before taxes, in each full calendar year since inception of the Retirement Class. Because the expenses vary across share classes, the performance of the Retirement Class may vary from the other share classes. Below the bar chart are the best and worst returns of the Retirement Class 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 the Retirement, Class I, Premier and Class R6 classes over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2024, and how those returns compare to those of a broad-based securities market index and a composite index based on the Fund’s target allocations. 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 the Retirement Class shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for the Retirement Class shares.

The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund and certain Underlying Funds 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 indices listed below are unmanaged, and you cannot invest directly in an index. The returns for the indices 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 RETIREMENT CLASS SHARES (%)† Nuveen Lifecycle Index 2065 Fund
Bar Chart Footnotes [Text Block]

 The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was 9.71%.

Bar Chart Closing [Text Block]

Best quarter: 10.92%, for the quarter ended December 31, 2023. Worst quarter: -14.56%, for the quarter ended June 30, 2022.

Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2024 #
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 Lifecycle Index 2065 Fund
12 Months Ended 51 Months Ended
May 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index    
Russell 3000® Index | Average Annual Return, Percent   23.81% 15.06%
Russell 3000® Index | Performance Inception Date     Sep. 30, 2020
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Label [Optional Text] Bloomberg U.S. Aggregate Bond Index    
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Percent   1.25% (1.91%)
Bloomberg U.S. Aggregate Bond Index | Performance Inception Date     Sep. 30, 2020
S&P Target Date 2065+ Index | Average Annual Return, Label [Optional Text] S&P Target Date 2065+ Index    
S&P Target Date 2065+ Index | Average Annual Return, Percent   14.83% 11.12%
S&P Target Date 2065+ Index | Performance Inception Date     Sep. 30, 2020
Lifecycle Index 2065 Fund Composite Index | Average Annual Return, Label [Optional Text] [1] Lifecycle Index 2065 Fund Composite Index    
Lifecycle Index 2065 Fund Composite Index | Average Annual Return, Percent   16.04% 11.17%
Lifecycle Index 2065 Fund Composite Index | Performance Inception Date     Sep. 30, 2020
Class I | Average Annual Return, Percent   15.63% 10.96%
Class I | Performance Inception Date     Sep. 30, 2020
Premier Class | Average Annual Return, Percent   15.68% 10.92%
Premier Class | Performance Inception Date     Sep. 30, 2020
Class R6 | Average Annual Return, Percent   15.76% 11.06%
Class R6 | Performance Inception Date     Sep. 30, 2020
Retirement Class | Average Annual Return, Percent   15.48% 10.72%
Retirement Class | Performance Inception Date     Sep. 30, 2020
Retirement Class | After Taxes on Distributions | Average Annual Return, Percent   14.90% 10.08%
Retirement Class | After Taxes on Distributions | Performance Inception Date     Sep. 30, 2020
Retirement Class | After Taxes on Distributions and Sales | Average Annual Return, Percent   9.47% 8.34%
Retirement Class | After Taxes on Distributions and Sales | Performance Inception Date     Sep. 30, 2020
[1]

As of the close of business on December 31, 2024, the Lifecycle Index 2065 Fund Composite Index consisted of: 61.0% Russell 3000® Index; 32.9% MSCI EAFE + Emerging Markets Index; and 6.1% Bloomberg U.S. Aggregate Bond Index. The Fund’s composite benchmark, the components that make up a composite benchmark and the method of calculating a composite benchmark’s performance may vary over time.

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 Lifecycle Index 2065 Fund | Retirement Class  
Prospectus [Line Items]  
Year to Date Return, Label [Optional Text] The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was
Bar Chart, Year to Date Return 9.71%
Bar Chart, Year to Date Return, Date Jun. 30, 2025
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 10.92%
Highest Quarterly Return, Date Dec. 31, 2023
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (14.56%)
Lowest Quarterly Return, Date Jun. 30, 2022
Nuveen Lifecycle Index 2070 Fund  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Past performance
Performance Narrative [Text Block]

Performance information is not available for the Fund for the most recently completed calendar year because the Fund is newly operational.

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 One Year or Less [Text] Performance information is not available for the Fund for the most recently completed calendar year because the Fund is newly operational.
Performance Availability Website Address [Text] www.nuveen.com/performance
Nuveen Lifestyle Income 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 A, Class I, Premier and Retirement classes over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2024, and how those returns compare to those of a broad-based securities market index and a composite index based on the Fund’s target allocations. 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 and certain Underlying Funds 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 indices listed below are unmanaged, and you cannot invest directly in an index. The returns for the indices 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 Lifestyle Income Fund
Bar Chart Footnotes [Text Block]

 The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was 4.60%.

Bar Chart Closing [Text Block]

Best quarter: 7.76%, for the quarter ended June 30, 2020. Worst quarter: -6.22%, for the quarter ended June 30, 2022.

Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2024 #
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 Lifestyle Income Fund
12 Months Ended 60 Months Ended 109 Months Ended 120 Months Ended
May 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index        
Russell 3000® Index | Average Annual Return, Percent   23.81% 13.86% 13.55% 12.55%
Russell 3000® Index | Performance Inception Date       Dec. 04, 2015  
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Label [Optional Text] Bloomberg U.S. Aggregate Bond Index        
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Percent   1.25% (0.33%) 1.41% 1.35%
Bloomberg U.S. Aggregate Bond Index | Performance Inception Date       Dec. 04, 2015  
Morningstar Conservative Target Risk Index | Average Annual Return, Label [Optional Text] Morningstar Conservative Target Risk Index        
Morningstar Conservative Target Risk Index | Average Annual Return, Percent   3.57% 1.69% 3.21% 2.86%
Morningstar Conservative Target Risk Index | Performance Inception Date       Dec. 04, 2015  
Lifestyle Income Fund Composite Index | Average Annual Return, Label [Optional Text] [1] Lifestyle Income Fund Composite Index        
Lifestyle Income Fund Composite Index | Average Annual Return, Percent   5.58% 2.79% 3.58% 3.34%
Lifestyle Income Fund Composite Index | Performance Inception Date       Dec. 04, 2015  
Class A | Average Annual Return, Percent [2]   (0.15%) 1.62%   2.74%
Class I | Average Annual Return, Percent   6.12% 3.04% 3.79%  
Class I | Performance Inception Date       Dec. 04, 2015  
Premier Class | Average Annual Return, Percent   6.02% 2.96%   3.47%
Class R6 | Average Annual Return, Percent   6.23% 3.12%   3.64%
Class R6 | After Taxes on Distributions | Average Annual Return, Percent   4.67% 1.72%   2.33%
Class R6 | After Taxes on Distributions and Sales | Average Annual Return, Percent   3.74% 1.92%   2.35%
Retirement Class | Average Annual Return, Percent   5.96% 2.86%   3.37%
[1]

As of the close of business on December 31, 2024, the Lifestyle Income Fund Composite Index consisted of: 40.0% Bloomberg U.S. Aggregate Bond Index; 40.0% Bloomberg U.S. 1–3 Year Government/Credit Bond Index; 13.0% Russell 3000® Index; and 7.0% MSCI All Country World Index ex USA Investable Market Index. The Fund’s composite benchmark, the components that make up a composite benchmark and the method of calculating a composite benchmark’s performance may vary over time.

[2]

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 Lifestyle Income Fund | Class R6  
Prospectus [Line Items]  
Year to Date Return, Label [Optional Text] The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was
Bar Chart, Year to Date Return 4.60%
Bar Chart, Year to Date Return, Date Jun. 30, 2025
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 7.76%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (6.22%)
Lowest Quarterly Return, Date Jun. 30, 2022
Nuveen Lifestyle Conservative 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 A, Class I, Premier and Retirement classes over

the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2024, and how those returns compare to those of a broad-based securities market index and a composite index based on the Fund’s target allocations. 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 and certain Underlying Funds 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 indices listed below are unmanaged, and you cannot invest directly in an index. The returns for the indices 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 Lifestyle Conservative Fund
Bar Chart Footnotes [Text Block]

 The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was 5.77%.

Bar Chart Closing [Text Block]

Best quarter: 11.74%, for the quarter ended June 30, 2020. Worst quarter: -10.29%, for the quarter ended March 31, 2020.

Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2024 #
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 Lifestyle Conservative Fund
12 Months Ended 60 Months Ended 109 Months Ended 120 Months Ended
May 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index        
Russell 3000® Index | Average Annual Return, Percent   23.81% 13.86% 13.55% 12.55%
Russell 3000® Index | Performance Inception Date       Dec. 04, 2015  
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Label [Optional Text] Bloomberg U.S. Aggregate Bond Index        
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Percent   1.25% (0.33%) 1.41% 1.35%
Bloomberg U.S. Aggregate Bond Index | Performance Inception Date       Dec. 04, 2015  
Morningstar Moderately Conservative Target Risk Index | Average Annual Return, Label [Optional Text] Morningstar Moderately Conservative Target Risk Index        
Morningstar Moderately Conservative Target Risk Index | Average Annual Return, Percent   6.40% 3.88% 5.22% 4.71%
Morningstar Moderately Conservative Target Risk Index | Performance Inception Date       Dec. 04, 2015  
Lifestyle Conservative Fund Composite Index | Average Annual Return, Label [Optional Text] [1] Lifestyle Conservative Fund Composite Index        
Lifestyle Conservative Fund Composite Index | Average Annual Return, Percent   8.06% 4.65% 5.51% 5.08%
Lifestyle Conservative Fund Composite Index | Performance Inception Date       Dec. 04, 2015  
Class A | Average Annual Return, Percent [2]   1.77% 3.19%   4.25%
Class I | Average Annual Return, Percent   8.21% 4.61% 5.40%  
Class I | Performance Inception Date       Dec. 04, 2015  
Premier Class | Average Annual Return, Percent   8.15% 4.55%   5.00%
Class R6 | Average Annual Return, Percent   8.34% 4.72%   5.16%
Class R6 | After Taxes on Distributions | Average Annual Return, Percent   7.04% 3.14%   3.76%
Class R6 | After Taxes on Distributions and Sales | Average Annual Return, Percent   5.05% 3.19%   3.60%
Retirement Class | Average Annual Return, Percent   7.99% 4.44%   4.90%
[1]

As of the close of business on December 31, 2024, the Lifestyle Conservative Fund Composite Index consisted of: 40.0% Bloomberg U.S. Aggregate Bond Index; 26.0% Russell 3000® Index; 20.0% Bloomberg U.S. 1-3 Year Government/Credit Bond Index; and 14.0% MSCI All Country World Index ex USA Investable Market Index. The Fund’s composite benchmark, the components that make up a composite benchmark and the method of calculating a composite benchmark’s performance may vary over time.

[2]

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 Lifestyle Conservative Fund | Class R6  
Prospectus [Line Items]  
Year to Date Return, Label [Optional Text] The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was
Bar Chart, Year to Date Return 5.77%
Bar Chart, Year to Date Return, Date Jun. 30, 2025
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 11.74%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (10.29%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen Lifestyle Moderate 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 A, Class I, Premier and Retirement classes over the applicable one-year, five-year, ten-year and since-inception periods ended

December 31, 2024, and how those returns compare to those of a broad-based securities market index and a composite index based on the Fund’s target allocations. 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 and certain Underlying Funds 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 indices listed below are unmanaged, and you cannot invest directly in an index. The returns for the indices 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 Lifestyle Moderate Fund
Bar Chart Footnotes [Text Block]

 The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was 6.93%.

Bar Chart Closing [Text Block]

Best quarter: 15.77%, for the quarter ended June 30, 2020. Worst quarter: -14.65%, for the quarter ended March 31, 2020.

Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2024 #
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 Lifestyle Moderate Fund
12 Months Ended 60 Months Ended 109 Months Ended 120 Months Ended
May 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index        
Russell 3000® Index | Average Annual Return, Percent   23.81% 13.86% 13.55% 12.55%
Russell 3000® Index | Performance Inception Date       Dec. 04, 2015  
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Label [Optional Text] Bloomberg U.S. Aggregate Bond Index        
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Percent   1.25% (0.33%) 1.41% 1.35%
Bloomberg U.S. Aggregate Bond Index | Performance Inception Date       Dec. 04, 2015  
Morningstar Moderate Target Risk Index | Average Annual Return, Label [Optional Text] Morningstar Moderate Target Risk Index        
Morningstar Moderate Target Risk Index | Average Annual Return, Percent   8.27% 5.37% 6.75% 6.05%
Morningstar Moderate Target Risk Index | Performance Inception Date       Dec. 04, 2015  
Lifestyle Moderate Fund Composite Index | Average Annual Return, Label [Optional Text] [1] Lifestyle Moderate Fund Composite Index        
Lifestyle Moderate Fund Composite Index | Average Annual Return, Percent   10.56% 6.41% 7.36% 6.76%
Lifestyle Moderate Fund Composite Index | Performance Inception Date       Dec. 04, 2015  
Class A | Average Annual Return, Percent [2]   3.76% 4.73%   5.74%
Class I | Average Annual Return, Percent   10.25% 6.16% 6.99%  
Class I | Performance Inception Date       Dec. 04, 2015  
Premier Class | Average Annual Return, Percent   10.21% 6.09%   6.49%
Class R6 | Average Annual Return, Percent   10.44% 6.26%   6.65%
Class R6 | After Taxes on Distributions | Average Annual Return, Percent   9.34% 4.56%   5.13%
Class R6 | After Taxes on Distributions and Sales | Average Annual Return, Percent   6.42% 4.44%   4.84%
Retirement Class | Average Annual Return, Percent   10.11% 5.98%   6.38%
[1]

As of the close of business on December 31, 2024, the Lifestyle Moderate Fund Composite Index consisted of: 40.0% Bloomberg U.S. Aggregate Bond Index; 39.0% Russell 3000® Index; and 21.0% MSCI All Country World Index ex USA Investable Market Index. The Fund’s composite benchmark, the components that make up a composite benchmark and the method of calculating a composite benchmark’s performance may vary over time.

[2]

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 Lifestyle Moderate Fund | Class R6  
Prospectus [Line Items]  
Year to Date Return, Label [Optional Text] The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was
Bar Chart, Year to Date Return 6.93%
Bar Chart, Year to Date Return, Date Jun. 30, 2025
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 15.77%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (14.65%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen Lifestyle 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 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 A, Class I, Premier and Retirement classes over the applicable one-year, five-year, ten-year and since-inception periods ended

December 31, 2024, and how those returns compare to those of a broad-based securities market index and a composite index based on the Fund’s target allocations. 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 and certain Underlying Funds 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 indices listed below are unmanaged, and you cannot invest directly in an index. The returns for the indices 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 Lifestyle Growth Fund
Bar Chart Footnotes [Text Block]

 The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was 7.84%.

Bar Chart Closing [Text Block]

Best quarter: 19.02%, for the quarter ended June 30, 2020. Worst quarter: -18.64%, for the quarter ended March 31, 2020.

Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2024 #
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 Lifestyle Growth Fund
12 Months Ended 60 Months Ended 109 Months Ended 120 Months Ended
May 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index        
Russell 3000® Index | Average Annual Return, Percent   23.81% 13.86% 13.55% 12.55%
Russell 3000® Index | Performance Inception Date       Dec. 04, 2015  
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Label [Optional Text] Bloomberg U.S. Aggregate Bond Index        
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Percent   1.25% (0.33%) 1.41% 1.35%
Bloomberg U.S. Aggregate Bond Index | Performance Inception Date       Dec. 04, 2015  
Morningstar Moderately Aggressive Target Risk Index | Average Annual Return, Label [Optional Text] Morningstar Moderately Aggressive Target Risk Index        
Morningstar Moderately Aggressive Target Risk Index | Average Annual Return, Percent   10.66% 7.02% 8.37% 7.49%
Morningstar Moderately Aggressive Target Risk Index | Performance Inception Date       Dec. 04, 2015  
Lifestyle Growth Fund Composite Index | Average Annual Return, Label [Optional Text] [1] Lifestyle Growth Fund Composite Index        
Lifestyle Growth Fund Composite Index | Average Annual Return, Percent   13.80% 8.55% 9.25% 8.45%
Lifestyle Growth Fund Composite Index | Performance Inception Date       Dec. 04, 2015  
Class A | Average Annual Return, Percent [2]   6.16% 6.50%   7.11%
Class I | Average Annual Return, Percent   12.81% 7.96% 8.51%  
Class I | Performance Inception Date       Dec. 04, 2015  
Premier Class | Average Annual Return, Percent   12.76% 7.93%   7.90%
Class R6 | Average Annual Return, Percent   12.98% 8.07%   8.06%
Class R6 | After Taxes on Distributions | Average Annual Return, Percent   12.10% 6.37%   6.58%
Class R6 | After Taxes on Distributions and Sales | Average Annual Return, Percent   8.07% 5.96%   6.10%
Retirement Class | Average Annual Return, Percent   12.64% 7.80%   7.78%
[1]

As of the close of business on December 31, 2024, the Lifestyle Growth Fund Composite Index consisted of: 52.0% Russell 3000® Index; 28.0% MSCI All Country World Index ex USA Investable Market Index; and 20.0% Bloomberg U.S. Aggregate Bond Index. The Fund’s composite benchmark, the components that make up a composite benchmark and the method of calculating a composite benchmark’s performance may vary over time.

[2]

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 Lifestyle Growth Fund | Class R6  
Prospectus [Line Items]  
Year to Date Return, Label [Optional Text] The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was
Bar Chart, Year to Date Return 7.84%
Bar Chart, Year to Date Return, Date Jun. 30, 2025
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 19.02%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (18.64%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen Lifestyle Aggressive 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 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 A, Class I, Premier and Retirement classes over the applicable one-year, five-year, ten-year and since-inception periods ended

December 31, 2024, and how those returns compare to those of a broad-based securities market index and a composite index based on the Fund’s target allocations. 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 and certain Underlying Funds 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 indices listed below are unmanaged, and you cannot invest directly in an index. The returns for the indices 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 Lifestyle Aggressive Growth Fund
Bar Chart Footnotes [Text Block]

 The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was 8.86%.

Bar Chart Closing [Text Block]

Best quarter: 22.38%, for the quarter ended June 30, 2020. Worst quarter: -22.27%, for the quarter ended March 31, 2020.

Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2024 #
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 Lifestyle Aggressive Growth Fund
12 Months Ended 60 Months Ended 109 Months Ended 120 Months Ended
May 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index        
Russell 3000® Index | Average Annual Return, Percent   23.81% 13.86% 13.55% 12.55%
Russell 3000® Index | Performance Inception Date       Dec. 04, 2015  
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Label [Optional Text] Bloomberg U.S. Aggregate Bond Index        
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Percent   1.25% (0.33%) 1.41% 1.35%
Bloomberg U.S. Aggregate Bond Index | Performance Inception Date       Dec. 04, 2015  
Morningstar Aggressive Target Risk Index | Average Annual Return, Label [Optional Text] Morningstar Aggressive Target Risk Index        
Morningstar Aggressive Target Risk Index | Average Annual Return, Percent   12.50% 8.25% 9.54% 8.55%
Morningstar Aggressive Target Risk Index | Performance Inception Date       Dec. 04, 2015  
Lifestyle Aggressive Growth Fund Composite Index | Average Annual Return, Label [Optional Text] [1] Lifestyle Aggressive Growth Fund Composite Index        
Lifestyle Aggressive Growth Fund Composite Index | Average Annual Return, Percent   17.11% 10.63% 11.08% 10.09%
Lifestyle Aggressive Growth Fund Composite Index | Performance Inception Date       Dec. 04, 2015  
Class A | Average Annual Return, Percent [2]   8.57% 8.26%   8.46%
Class I | Average Annual Return, Percent   15.34% 9.76% 10.01%  
Class I | Performance Inception Date       Dec. 04, 2015  
Premier Class | Average Annual Return, Percent   15.29% 9.68%   9.27%
Class R6 | Average Annual Return, Percent   15.46% 9.87%   9.43%
Class R6 | After Taxes on Distributions | Average Annual Return, Percent   14.70% 8.18%   7.91%
Class R6 | After Taxes on Distributions and Sales | Average Annual Return, Percent   9.73% 7.44%   7.27%
Retirement Class | Average Annual Return, Percent   15.20% 9.58%   9.16%
[1]

As of the close of business on December 31, 2024, the Lifestyle Aggressive Growth Fund Composite Index consisted of: 65.0% Russell 3000® Index; and 35.0% MSCI All Country World Index ex USA Investable Market Index. The Fund’s composite benchmark, the components that make up a composite benchmark and the method of calculating a composite benchmark’s performance may vary over time.

[2]

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 Lifestyle Aggressive Growth Fund | Class R6  
Prospectus [Line Items]  
Year to Date Return, Label [Optional Text] The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was
Bar Chart, Year to Date Return 8.86%
Bar Chart, Year to Date Return, Date Jun. 30, 2025
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 22.38%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (22.27%)
Lowest Quarterly Return, Date Mar. 31, 2020
Nuveen Managed Allocation 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 A and Retirement classes over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2024, and how those returns compare to those of a broad-based securities market index and a composite index based on the Fund’s target allocations. 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 and certain Underlying Funds 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 indices listed below are unmanaged, and you cannot invest directly in an index. The returns for the indices 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 (%)†
Bar Chart Footnotes [Text Block]

 The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was 6.99%.

Bar Chart Closing [Text Block]

Best quarter: 15.68%, for the quarter ended June 30, 2020. Worst quarter: -14.72%, for the quarter ended March 31, 2020.

Performance Table Heading AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2024*
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 Managed Allocation Fund
12 Months Ended 60 Months Ended 120 Months Ended
May 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Russell 3000® Index | Average Annual Return, Label [Optional Text] Russell 3000® Index      
Russell 3000® Index | Average Annual Return, Percent   23.81% 13.86% 12.55%
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Label [Optional Text] Bloomberg U.S. Aggregate Bond Index      
Bloomberg U.S. Aggregate Bond Index | Average Annual Return, Percent   1.25% (0.33%) 1.35%
Morningstar Moderate Target Risk Index | Average Annual Return, Label [Optional Text] Morningstar Moderate Target Risk Index      
Morningstar Moderate Target Risk Index | Average Annual Return, Percent   8.27% 5.37% 6.05%
Managed Allocation Fund Composite Index | Average Annual Return, Label [Optional Text] [1] Managed Allocation Fund Composite Index      
Managed Allocation Fund Composite Index | Average Annual Return, Percent   10.56% 6.41% 6.76%
Class A | Average Annual Return, Percent   3.87% 4.78% 5.84%
Class R6 | Average Annual Return, Percent   10.48% 6.30% 6.73%
Class R6 | After Taxes on Distributions | Average Annual Return, Percent   8.99% 4.23% 4.87%
Class R6 | After Taxes on Distributions and Sales | Average Annual Return, Percent   6.65% 4.38% 4.80%
Retirement Class | Average Annual Return, Percent   10.21% 6.03% 6.47%
[1]

As of the close of business on December 31, 2024, the Managed Allocation Fund Composite Index consisted of: 40.0% Bloomberg U.S. Aggregate Bond Index; 39.0% Russell 3000® Index; and 21.0% MSCI All Country World Index ex USA Investable Market Index. The Fund’s composite benchmark, the components that make up a composite benchmark and the method of calculating a composite benchmark’s performance may vary over time.

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 Managed Allocation Fund | Class R6  
Prospectus [Line Items]  
Year to Date Return, Label [Optional Text] The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2025, was
Bar Chart, Year to Date Return 6.99%
Bar Chart, Year to Date Return, Date Jun. 30, 2025
Highest Quarterly Return, Label [Optional Text] Best quarter
Highest Quarterly Return 15.68%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst quarter
Lowest Quarterly Return (14.72%)
Lowest Quarterly Return, Date Mar. 31, 2020