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] |
|
||||
| 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] |
|
||||
| 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] |
|
||||
| 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] |
|
||||
| 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] |
|
||||
| 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] |
|
||||
| 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] |
|
||||
| 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] |
|
||||
| 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] |
|
||||
| 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] |
|
||||
| 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] |
|
||||
| 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] |
|
||||
| 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] |
|
||||
| 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] |
|
||||
| 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] |
|
||||
| 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] |
|
||||
| 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] |
|
||||
| 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] |
|
||||
| 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] |
|
||||
| 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] |
|
||||
| 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] |
|
||||
| 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] |
|
||||
| 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] |
|
||||
| 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] |
|
||||
| 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] |
|
||||
| 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] |
|
||||
| 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] |
|
||||
| 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] |
|
||||
| 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] |
|
||||
| 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] |
|
||||
| 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] |
|
||||
| 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] |
|
||||
| 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 |