Performance Management |
Dec. 31, 2025 |
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| Nuveen Inflation Linked Bond 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 A, Class I, Premier Class, Class R6, Retirement Class and Class W over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2025, and how those returns compare to those of the Fund’s broad-based securities market index and benchmark index. For periods prior to August 1, 2026, Teachers Advisors, LLC (“Advisors”) served as investment adviser to the Fund. After-tax performance is shown only for Class R6 shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for Class R6 shares. The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund for certain fees and expenses. Without these waivers and reimbursements, the returns of the Fund would have been lower. Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future. The broad-based securities market index and benchmark index listed below are unmanaged, and you cannot invest directly in an index. The returns for the broad-based securities market index and benchmark index reflect no deduction for fees, expenses or taxes. For current performance information of each share class, including performance to the most recent month-end, please visit www.nuveen.com/performance or call 800-257-8787. |
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| 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 Inflation Linked Bond Fund | ||
| Bar Chart Closing [Text Block] | Best quarter: 3.90%, for the quarter ended March 31, 2025. Worst quarter: -3.80%, for the quarter ended September 30, 2022. |
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| Performance Table Heading | AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2025 † | ||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates in effect during the periods shown and do not reflect the impact of state and local taxes. | ||
| Performance Table Not Relevant to Tax Deferred | The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements such as 401(a), 401(k) or 403(b) plans or Individual Retirement Accounts (IRAs). | ||
| Performance [Table] |
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| 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. |
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| Thirty Day Yield Phone | 800-842-2252 | ||
| Performance Availability Website Address [Text] | www.nuveen.com/performance | ||
| Nuveen Inflation Linked Bond Fund | Class R6 | |||
| Prospectus [Line Items] | |||
| Highest Quarterly Return, Label [Optional Text] | Best quarter | ||
| Highest Quarterly Return | 3.90% | ||
| Highest Quarterly Return, Date | Mar. 31, 2025 | ||
| Lowest Quarterly Return, Label [Optional Text] | Worst quarter | ||
| Lowest Quarterly Return | (3.80%) | ||
| Lowest Quarterly Return, Date | Sep. 30, 2022 | ||
| Nuveen Real Estate Securities Select 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 A, Class I, Premier Class, Class R6 and Retirement Class over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2025, and how those returns compare to those of the Fund’s broad-based securities market index and benchmark index. For periods prior to August 1, 2026, Teachers Advisors, LLC (“Advisors”) served as investment adviser to the Fund. After-tax performance is shown only for Class R6 shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for Class R6 shares. The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive, reimburse and/or compensate the Fund for certain fees, expenses and/or costs. Without these reductions and/or compensation, the returns of the Fund would have been lower. Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future. The broad-based securities market index and benchmark index listed below are unmanaged, and you cannot invest directly in an index. The returns for the broad-based securities market index and benchmark index reflect no deduction for fees, expenses or taxes. For current performance information of each share class, including performance to the most recent month-end, please visit www.nuveen.com/performance or call 800-257-8787. |
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| 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 Real Estate Securities Select Fund | ||
| Bar Chart Closing [Text Block] | Best quarter: 17.29%, for the quarter ended March 31, 2019. Worst quarter: -19.62%, for the quarter ended March 31, 2020. |
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| Performance Table Heading | AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2025 † | ||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates in effect during the periods shown and do not reflect the impact of state and local taxes. | ||
| Performance Table Not Relevant to Tax Deferred | The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements such as 401(a), 401(k) or 403(b) plans or Individual Retirement Accounts (IRAs). | ||
| Performance [Table] |
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| 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. |
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| Performance Availability Website Address [Text] | www.nuveen.com/performance | ||
| Nuveen Real Estate Securities Select Fund | Class R6 | |||
| Prospectus [Line Items] | |||
| Highest Quarterly Return, Label [Optional Text] | Best quarter | ||
| Highest Quarterly Return | 17.29% | ||
| Highest Quarterly Return, Date | Mar. 31, 2019 | ||
| Lowest Quarterly Return, Label [Optional Text] | Worst quarter | ||
| Lowest Quarterly Return | (19.62%) | ||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | ||
| Nuveen Emerging Markets Debt Fund | |||
| Prospectus [Line Items] | |||
| Bar Chart and Performance Table [Heading] | Past performance | ||
| Performance Narrative [Text Block] | The following chart and table help illustrate some of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year. The bar chart shows the annual total returns of Class R6 of the Fund, before taxes, in each full calendar year for the last ten years. Because the expenses vary across share classes, the performance of Class R6 may vary from the other share classes. Below the bar chart are the best and worst returns of Class R6 for a calendar quarter during the full calendar-year periods covered by the bar chart. The performance table following the bar chart shows the Fund’s average annual total returns for Class R6, Class I, Premier Class, Retirement Class, Class A and Class W over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2025, and how those returns compare to those of the Fund’s broad-based securities market and benchmark index. For periods prior to August 1, 2026, Teachers Advisors, LLC (“Advisors”) served as investment adviser to the Fund. After-tax performance is shown only for Class R6 shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for Class R6 shares. The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund for certain fees and expenses. Without these waivers and reimbursements, the returns of the Fund would have been lower. Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future. The broad-based securities market and benchmark index listed below is unmanaged, and you cannot invest directly in an index. The returns for the broad-based securities market and benchmark index reflect no deduction for fees, expenses or taxes. For current performance information of each share class, including performance to the most recent month-end, please visit www.nuveen.com/performance or call 800-257-8787. |
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| Performance Past Does Not Indicate Future [Text] | Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future. | ||
| Performance Information Illustrates Variability of Returns [Text] | The following chart and table help illustrate some of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year. | ||
| Bar Chart [Heading] | ANNUAL TOTAL RETURNS FOR CLASS R6 SHARES (%)Nuveen Emerging Markets Debt Fund | ||
| Bar Chart Closing [Text Block] | Best quarter: 16.43%, for the quarter ended June 30, 2020. Worst quarter: -18.22%, for the quarter ended March 31, 2020. |
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| Performance Table Heading | AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2025 † | ||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates in effect during the periods shown and do not reflect the impact of state and local taxes. | ||
| Performance Table Not Relevant to Tax Deferred | The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements such as 401(a), 401(k) or 403(b) plans or Individual Retirement Accounts (IRAs). | ||
| Performance [Table] |
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| 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. |
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| Performance Availability Website Address [Text] | www.nuveen.com/performance | ||
| Nuveen Emerging Markets Debt Fund | Class R6 | |||
| Prospectus [Line Items] | |||
| Highest Quarterly Return, Label [Optional Text] | Best quarter | ||
| Highest Quarterly Return | 16.43% | ||
| Highest Quarterly Return, Date | Jun. 30, 2020 | ||
| Lowest Quarterly Return, Label [Optional Text] | Worst quarter | ||
| Lowest Quarterly Return | (18.22%) | ||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | ||
| Nuveen International Bond Fund | |||
| Prospectus [Line Items] | |||
| Bar Chart and Performance Table [Heading] | Past performance | ||
| Performance Narrative [Text Block] | The following chart and table help illustrate some of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year. The bar chart shows the annual total returns of Class R6 of the Fund, before taxes, in each full calendar year since inception of Class R6. Because the expenses vary across share classes, the performance of Class R6 may vary from the other share classes. Below the bar chart are the best and worst returns of Class R6 for a calendar quarter during the full calendar-year periods covered by the bar chart. The performance table following the bar chart shows the Fund’s average annual total returns for Class R6, Class I, Premier Class, Retirement Class, Class A and Class W over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2025, and how those returns compare to those of the Fund’s broad-based securities market index and benchmark index. For periods prior to August 1, 2026, Teachers Advisors, LLC (“Advisors”) served as investment adviser to the Fund. After-tax performance is shown only for Class R6 shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for Class R6 shares. The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund for certain fees and expenses. Without these waivers and reimbursements, the returns of the Fund would have been lower. Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future. The broad-based securities market index and benchmark index listed below are unmanaged, and you cannot invest directly in an index. The returns for the broad-based securities market index and benchmark index reflect no deduction for fees, expenses or taxes. For current performance information of each share class, including performance to the most recent month-end, please visit www.nuveen.com/performance or call 800-257-8787. |
||
| Performance Past Does Not Indicate Future [Text] | Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future. | ||
| Performance Information Illustrates Variability of Returns [Text] | The following chart and table help illustrate some of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year. | ||
| Bar Chart [Heading] | ANNUAL TOTAL RETURNS FOR CLASS R6 SHARES (%)Nuveen International Bond Fund | ||
| Bar Chart Closing [Text Block] | Best quarter: 6.31%, for the quarter ended December 31, 2023. Worst quarter: -6.10%, for the quarter ended June 30, 2022. |
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| Performance Table Heading | AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2025 † | ||
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates in effect during the periods shown and do not reflect the impact of state and local taxes. | ||
| Performance Table Not Relevant to Tax Deferred | The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements such as 401(a), 401(k) or 403(b) plans or Individual Retirement Accounts (IRAs). | ||
| Performance [Table] |
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| 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. |
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| Performance Availability Website Address [Text] | www.nuveen.com/performance | ||
| Nuveen International Bond Fund | Class R6 | |||
| Prospectus [Line Items] | |||
| Highest Quarterly Return, Label [Optional Text] | Best quarter | ||
| Highest Quarterly Return | 6.31% | ||
| Highest Quarterly Return, Date | Dec. 31, 2023 | ||
| Lowest Quarterly Return, Label [Optional Text] | Worst quarter | ||
| Lowest Quarterly Return | (6.10%) | ||
| Lowest Quarterly Return, Date | Jun. 30, 2022 |