v3.25.2
Fees and Expenses
Mar. 31, 2025
Nuveen Bond Index Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and expenses
Expense Narrative [Text Block]

The following tables describe the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund or other Nuveen mutual funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial advisor and in “How You Can Buy and Sell Shares” on page 172 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 103 of the Fund’s Statement of Additional Information. In addition, more information about sales charge discounts and waivers for purchases of shares through specific financial intermediaries is set forth in the appendix to the Fund’s Prospectus entitled “Variations in Sales Charge Reductions and Waivers Available Through Certain Intermediaries.

The tables and examples below do not reflect any commissions that shareholders may be required to pay directly to their financial intermediaries when buying or selling Class I shares.
Shareholder Fees Caption [Optional Text] SHAREHOLDER FEES (fees paid directly from your investment)
Shareholder Fees [Table]
Shareholder Fees - Nuveen Bond Index Fund - USD ($)
Class A
Class I
Premier Class
Class R6
Retirement Class
Class W
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 3.75% 0.00% 0.00% 0.00% 0.00% 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%
Shareholder Fee, Other $ 15.00 $ 0 $ 0 $ 0 $ 0 $ 0
Operating Expenses Caption [Optional Text] ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
Annual Fund Operating Expenses - Nuveen Bond Index Fund
Class A
Class I
Premier Class
Class R6
Retirement Class
Class W
Management Fees (as a percentage of Assets) 0.06% 0.06% 0.06% 0.06% 0.06% 0.06%
Distribution and Service (12b-1) Fees 0.25% 0.00% 0.15% 0.00% 0.00% 0.00%
Other Expenses (as a percentage of Assets): 0.14% [1] 0.11% 0.01% 0.01% 0.26% 0.01%
Expenses (as a percentage of Assets) 0.45% 0.17% 0.22% 0.07% 0.32% 0.07%
Fee Waiver or Reimbursement [2] (0.01%) 0.00% 0.00% 0.00% 0.00% (0.07%) [3]
Net Expenses (as a percentage of Assets) 0.44% 0.17% 0.22% 0.07% 0.32% 0.00%
Fee Waiver or Reimbursement over Assets, Date of Termination July 31, 2026 July 31, 2026 July 31, 2026 July 31, 2026 July 31, 2026 July 31, 2026
[1]

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

Under the Fund’s expense reimbursement arrangements, the Fund’s investment adviser, Teachers Advisors, LLC, has contractually agreed to reimburse the Fund for any Total annual Fund operating expenses (excluding interest, taxes, brokerage commissions or other transactional expenses, Acquired fund fees and expenses and extraordinary expenses) that exceed: (i) 0.44% of average daily net assets for Class A shares; (ii) 0.24% of average daily net assets for Class I shares; (iii) 0.24% of average daily net assets for Premier Class shares; (iv) 0.09% of average daily net assets for Class R6 shares; (v) 0.34% of average daily net assets for Retirement Class shares; and (vi) 0.09% of average daily net assets for Class W shares of the Fund. These expense reimbursement arrangements will continue through at least July 31, 2026, unless changed with approval of the Board of Trustees.
[3]

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

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

Expense Example, With Redemption [Table]
Expense Example - Nuveen Bond Index Fund - USD ($)
Class A
Class I
Premier Class
Class R6
Retirement Class
Class W
Expense Example, with Redemption, 1 Year $ 418 $ 17 $ 23 $ 7 $ 33 $ 0
Expense Example, with Redemption, 3 Years 513 55 71 23 103 0
Expense Example, with Redemption, 5 Years 617 96 124 40 180 0
Expense Example, with Redemption, 10 Years $ 920 $ 217 $ 280 $ 90 $ 406 $ 0
Portfolio Turnover [Heading] Portfolio turnover
Portfolio Turnover [Text Block]

The Fund pays transaction costs, such as commissions, as applicable, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s performance. During the fiscal year ended March 31, 2025, the Fund’s portfolio turnover rate was 16% of the average value of its portfolio.
Portfolio Turnover, Rate 16.00%
Nuveen Bond Index Fund | Class A  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Core Bond Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and expenses
Expense Narrative [Text Block]

The following tables describe the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund or other Nuveen mutual funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial advisor and in “How You Can Buy and Sell Shares” on page 172 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 103 of the Fund’s Statement of Additional Information. In addition, more information about sales charge discounts and waivers for purchases of shares through specific financial intermediaries is set forth in the appendix to the Fund’s Prospectus entitled “Variations in Sales Charge Reductions and Waivers Available Through Certain Intermediaries.

The tables and examples below do not reflect any commissions that shareholders may be required to pay directly to their financial intermediaries when buying or selling Class I shares.
Shareholder Fees Caption [Optional Text] SHAREHOLDER FEES (fees paid directly from your investment)
Shareholder Fees [Table]
Shareholder Fees - Nuveen Core Bond Fund - USD ($)
Class A
Class I
Premier Class
Class R6
Retirement Class
Class W
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 3.75% 0.00% 0.00% 0.00% 0.00% 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%
Shareholder Fee, Other $ 15.00 $ 0 $ 0 $ 0 $ 0 $ 0
Operating Expenses Caption [Optional Text] ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
Annual Fund Operating Expenses - Nuveen Core Bond Fund
Class A
Class I
Premier Class
Class R6
Retirement Class
Class W
Management Fees (as a percentage of Assets) 0.27% 0.27% 0.27% 0.27% 0.27% 0.27%
Distribution and Service (12b-1) Fees 0.25% 0.00% 0.15% 0.00% 0.00% 0.00%
Other Expenses (as a percentage of Assets): 0.11% [1] 0.16% 0.03% 0.02% 0.26% 0.01%
Expenses (as a percentage of Assets) 0.63% 0.43% 0.45% 0.29% 0.53% 0.28%
Fee Waiver or Reimbursement [2] 0.00% 0.00% 0.00% 0.00% 0.00% (0.28%) [3]
Net Expenses (as a percentage of Assets) 0.63% 0.43% 0.45% 0.29% 0.53% 0.00%
Fee Waiver or Reimbursement over Assets, Date of Termination July 31, 2026 July 31, 2026 July 31, 2026 July 31, 2026 July 31, 2026 July 31, 2026
[1]

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

Under the Fund’s expense reimbursement arrangements, the Fund’s investment adviser, Teachers Advisors, LLC, has contractually agreed to reimburse the Fund for any Total annual Fund operating expenses (excluding interest, taxes, brokerage commissions or other transactional expenses, Acquired fund fees and expenses and extraordinary expenses) that exceed: (i) 0.70% of average daily net assets for Class A shares; (ii) 0.50% of average daily net assets for Class I shares; (iii) 0.50% of average daily net assets for Premier Class shares; (iv) 0.35% of average daily net assets for Class R6 shares; (v) 0.60% of average daily net assets for Retirement Class shares; and (vi) 0.35% of average daily net assets for Class W shares of the Fund. These expense reimbursement arrangements will continue through at least July 31, 2026, unless changed with approval of the Board of Trustees.
[3]

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

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

Expense Example, With Redemption [Table]
Expense Example - Nuveen Core Bond Fund - USD ($)
Class A
Class I
Premier Class
Class R6
Retirement Class
Class W
Expense Example, with Redemption, 1 Year $ 437 $ 44 $ 46 $ 30 $ 54 $ 0
Expense Example, with Redemption, 3 Years 569 138 144 93 170 0
Expense Example, with Redemption, 5 Years 713 241 252 163 296 0
Expense Example, with Redemption, 10 Years $ 1,132 $ 542 $ 567 $ 368 $ 665 $ 0
Portfolio Turnover [Heading] Portfolio turnover
Portfolio Turnover [Text Block]

The Fund pays transaction costs, such as commissions, as applicable, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s performance. During the fiscal year ended March 31, 2025, the Fund’s portfolio turnover rate was 66% of the average value of its portfolio.
Portfolio Turnover, Rate 66.00%
Nuveen Core Bond Fund | Class A  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimates for the current fiscal year.
Nuveen Core Impact Bond Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and expenses
Expense Narrative [Text Block]

The following tables describe the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund or other Nuveen mutual funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial advisor and in “How You Can Buy and Sell Shares” on page 172 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 103 of the Fund’s Statement of Additional Information. In addition, more information about sales charge discounts and waivers for purchases of shares through specific financial intermediaries is set forth in the appendix to the Fund’s Prospectus entitled “Variations in Sales Charge Reductions and Waivers Available Through Certain Intermediaries.

The tables and examples below do not reflect any commissions that shareholders may be required to pay directly to their financial intermediaries when buying or selling Class I shares.
Shareholder Fees Caption [Optional Text] SHAREHOLDER FEES (fees paid directly from your investment)
Shareholder Fees [Table]
Shareholder Fees - Nuveen Core Impact Bond Fund - USD ($)
Class A
Class I
Premier Class
Class R6
Retirement Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 3.75% 0.00% 0.00% 0.00% 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) 0.00% 0.00% 0.00% 0.00% 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00% 0.00% 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00% 0.00% 0.00% 0.00%
Shareholder Fee, Other $ 15.00 $ 0 $ 0 $ 0 $ 0
Operating Expenses Caption [Optional Text] ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
Annual Fund Operating Expenses - Nuveen Core Impact Bond Fund
Class A
Class I
Premier Class
Class R6
Retirement Class
Management Fees (as a percentage of Assets) 0.33% 0.33% 0.33% 0.33% 0.33%
Distribution and Service (12b-1) Fees 0.25% 0.00% 0.15% 0.00% 0.00%
Other Expenses (as a percentage of Assets): 0.09% 0.08% 0.03% 0.02% 0.27%
Expenses (as a percentage of Assets) 0.67% 0.41% 0.51% 0.35% 0.60%
Fee Waiver or Reimbursement [1] 0.00% 0.00% 0.00% 0.00% 0.00%
Net Expenses (as a percentage of Assets) 0.67% 0.41% 0.51% 0.35% 0.60%
Fee Waiver or Reimbursement over Assets, Date of Termination July 31, 2026 July 31, 2026 July 31, 2026 July 31, 2026 July 31, 2026
[1]

Under the Fund’s expense reimbursement arrangements, the Fund’s investment adviser, Teachers Advisors, LLC, has contractually agreed to reimburse the Fund for any Total annual Fund operating expenses (excluding interest, taxes, brokerage commissions or other transactional expenses, Acquired fund fees and expenses and extraordinary expenses) that exceed: (i) 0.75% of average daily net assets for Class A shares; (ii) 0.55% of average daily net assets for Class I shares; (iii) 0.55% of average daily net assets for Premier Class shares; (iv) 0.40% of average daily net assets for Class R6 shares; and (v) 0.65% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least July 31, 2026, unless changed with approval of the Board of Trustees.
Expense Example [Heading] Example
Expense Example Narrative [Text Block]

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

Expense Example, With Redemption [Table]
Expense Example - Nuveen Core Impact Bond Fund - USD ($)
Class A
Class I
Premier Class
Class R6
Retirement Class
Expense Example, with Redemption, 1 Year $ 441 $ 42 $ 52 $ 36 $ 61
Expense Example, with Redemption, 3 Years 581 132 164 113 192
Expense Example, with Redemption, 5 Years 734 230 285 197 335
Expense Example, with Redemption, 10 Years $ 1,178 $ 518 $ 640 $ 443 $ 750
Portfolio Turnover [Heading] Portfolio turnover
Portfolio Turnover [Text Block]

The Fund pays transaction costs, such as commissions, as applicable, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s

performance. During the fiscal year ended March 31, 2025, the Fund’s portfolio turnover rate was 147% of the average value of its portfolio.
Portfolio Turnover, Rate 147.00%
Nuveen Core Plus Bond Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and expenses
Expense Narrative [Text Block]

The following tables describe the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund or other Nuveen mutual funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial advisor and in “How You Can Buy and Sell Shares” on page 172 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 103 of the Fund’s Statement of Additional Information. In addition, more information about sales charge discounts and waivers for purchases of shares through specific financial intermediaries is set forth in the appendix to the Fund’s Prospectus entitled “Variations in Sales Charge Reductions and Waivers Available Through Certain Intermediaries.

The tables and examples below do not reflect any commissions that shareholders may be required to pay directly to their financial intermediaries when buying or selling Class I shares.
Shareholder Fees Caption [Optional Text] SHAREHOLDER FEES (fees paid directly from your investment)
Shareholder Fees [Table]
Shareholder Fees - Nuveen Core Plus Bond Fund - USD ($)
Class A
Class I
Premier Class
Class R6
Retirement Class
Class W
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 3.75% 0.00% 0.00% 0.00% 0.00% 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%
Shareholder Fee, Other $ 15.00 $ 0 $ 0 $ 0 $ 0 $ 0
Operating Expenses Caption [Optional Text] ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
Annual Fund Operating Expenses - Nuveen Core Plus Bond Fund
Class A
Class I
Premier Class
Class R6
Retirement Class
Class W
Management Fees (as a percentage of Assets) 0.28% 0.28% 0.28% 0.28% 0.28% 0.28%
Distribution and Service (12b-1) Fees 0.25% 0.00% 0.15% 0.00% 0.00% 0.00%
Other Expenses (as a percentage of Assets): 0.13% [1] 0.10% 0.02% 0.02% 0.27% 0.02%
Expenses (as a percentage of Assets) 0.66% 0.38% 0.45% 0.30% 0.55% 0.30%
Fee Waiver or Reimbursement [2] 0.00% 0.00% 0.00% 0.00% 0.00% (0.30%) [3]
Net Expenses (as a percentage of Assets) 0.66% 0.38% 0.45% 0.30% 0.55% 0.00%
Fee Waiver or Reimbursement over Assets, Date of Termination July 31, 2026 July 31, 2026 July 31, 2026 July 31, 2026 July 31, 2026 July 31, 2026
[1]

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

Under the Fund’s expense reimbursement arrangements, the Fund’s investment adviser, Teachers Advisors, LLC, has contractually agreed to reimburse the Fund for any Total annual Fund operating expenses (excluding interest, taxes, brokerage commissions or other transactional expenses, Acquired fund fees and expenses and extraordinary expenses) that exceed: (i) 0.70% of average daily net assets for Class A shares; (ii) 0.50% of average daily net assets for Class I shares; (iii) 0.50% of average daily net assets for Premier Class shares; (iv) 0.35% of average daily net assets for Class R6 shares; (v) 0.60% of average daily net assets for Retirement Class shares; and (vi) 0.35% of average daily net assets for Class W shares of the Fund. These expense reimbursement arrangements will continue through at least July 31, 2026, unless changed with approval of the Board of Trustees.
[3]

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

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

Expense Example, With Redemption [Table]
Expense Example - Nuveen Core Plus Bond Fund - USD ($)
Class A
Class I
Premier Class
Class R6
Retirement Class
Class W
Expense Example, with Redemption, 1 Year $ 440 $ 39 $ 46 $ 31 $ 56 $ 0
Expense Example, with Redemption, 3 Years 578 122 144 97 176 0
Expense Example, with Redemption, 5 Years 729 213 252 169 307 0
Expense Example, with Redemption, 10 Years $ 1,167 $ 480 $ 567 $ 381 $ 689 $ 0
Portfolio Turnover [Heading] Portfolio turnover
Portfolio Turnover [Text Block]

The Fund pays transaction costs, such as commissions, as applicable, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s performance. During the fiscal year ended March 31, 2025, the Fund’s portfolio turnover rate was 84% of the average value of its portfolio.
Portfolio Turnover, Rate 84.00%
Nuveen Core Plus Bond Fund | Class A  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimates for the current fiscal year.
Nuveen 5-15 Year Laddered Tax Exempt Bond Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and expenses
Expense Narrative [Text Block]

The following tables describe the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund or other Nuveen mutual funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial advisor and in “How You Can Buy and Sell Shares” on page 172 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 103 of the Fund’s Statement of Additional Information. In addition, more information about sales charge discounts and waivers for purchases of shares through specific financial intermediaries is set forth in the appendix to the Fund’s Prospectus entitled “Variations in Sales Charge Reductions and Waivers Available Through Certain Intermediaries.

The tables and examples below do not reflect any commissions that shareholders may be required to pay directly to their financial intermediaries when buying or selling Class I shares.
Shareholder Fees Caption [Optional Text] SHAREHOLDER FEES (fees paid directly from your investment)
Shareholder Fees [Table]
Shareholder Fees - Nuveen 5-15 Year Laddered Tax Exempt Bond Fund - USD ($)
Class A
Class I
Class R6
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 3.00% 0.00% 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) 0.00% 0.00% 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00% 0.00%
Shareholder Fee, Other $ 15.00 $ 0 $ 0
Operating Expenses Caption [Optional Text] ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
Annual Fund Operating Expenses - Nuveen 5-15 Year Laddered Tax Exempt Bond Fund
Class A
Class I
Class R6
Management Fees (as a percentage of Assets) 0.25% 0.25% 0.25%
Distribution and Service (12b-1) Fees 0.25% 0.00% 0.00%
Other Expenses (as a percentage of Assets): 0.17% [1] 0.19% [1] 0.09%
Expenses (as a percentage of Assets) 0.67% 0.44% 0.34%
Fee Waiver or Reimbursement [2] (0.06%) (0.04%) (0.04%)
Net Expenses (as a percentage of Assets) 0.61% 0.40% 0.30%
Fee Waiver or Reimbursement over Assets, Date of Termination July 31, 2026 July 31, 2026 July 31, 2026
[1]

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

Under the Fund’s expense reimbursement arrangements, the Fund’s investment adviser, Teachers Advisors, LLC, has contractually agreed to reimburse the Fund for any Total annual Fund operating expenses (excluding interest, taxes, brokerage commissions or other transactional expenses, Acquired fund fees and expenses and extraordinary expenses) that exceed: (i) 0.65% of average daily net assets for Class A shares; (ii) 0.45% of average daily net assets for Class I shares; and (iii) 0.30% of average daily net assets for Class R6 shares of the Fund. These expense reimbursement arrangements will continue through at least July 31, 2026, unless changed with approval of the Board of Trustees.
Expense Example [Heading] Example
Expense Example Narrative [Text Block]

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

Expense Example, With Redemption [Table]
Expense Example - Nuveen 5-15 Year Laddered Tax Exempt Bond Fund - USD ($)
Class A
Class I
Class R6
Expense Example, with Redemption, 1 Year $ 360 $ 41 $ 31
Expense Example, with Redemption, 3 Years 502 137 105
Expense Example, with Redemption, 5 Years 656 242 187
Expense Example, with Redemption, 10 Years $ 1,104 $ 551 $ 427
Portfolio Turnover [Heading] Portfolio turnover
Portfolio Turnover [Text Block]

The Fund pays transaction costs, such as commissions, as applicable, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s performance. During the fiscal year ended March 31, 2025, the Fund’s portfolio turnover rate was 25% of the average value of its portfolio.
Portfolio Turnover, Rate 25.00%
Nuveen 5-15 Year Laddered Tax Exempt Bond Fund | Class A  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimates for the current fiscal year.
Nuveen 5-15 Year Laddered Tax Exempt Bond Fund | Class I  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimates for the current fiscal year.
Nuveen Green Bond Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and expenses
Expense Narrative [Text Block]

The following tables describe the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund or other Nuveen mutual funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial advisor and in “How You Can Buy and Sell Shares” on page 172 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 103 of the Fund’s Statement of Additional Information. In addition, more information about sales charge discounts and waivers for purchases of shares through specific financial intermediaries is set forth in the appendix to the Fund’s Prospectus entitled “Variations in Sales Charge Reductions and Waivers Available Through Certain Intermediaries.

The tables and examples below do not reflect any commissions that shareholders may be required to pay directly to their financial intermediaries when buying or selling Class I shares.
Shareholder Fees Caption [Optional Text] SHAREHOLDER FEES (fees paid directly from your investment)
Shareholder Fees [Table]
Shareholder Fees - Nuveen Green Bond Fund - USD ($)
Class A
Class I
Premier Class
Class R6
Retirement Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 3.75% 0.00% 0.00% 0.00% 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) 0.00% 0.00% 0.00% 0.00% 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00% 0.00% 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00% 0.00% 0.00% 0.00%
Shareholder Fee, Other $ 15.00 $ 0 $ 0 $ 0 $ 0
Operating Expenses Caption [Optional Text] ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
Annual Fund Operating Expenses - Nuveen Green Bond Fund
Class A
Class I
Premier Class
Class R6
Retirement Class
Management Fees (as a percentage of Assets) 0.40% 0.40% 0.40% 0.40% 0.40%
Distribution and Service (12b-1) Fees 0.25% 0.00% 0.15% 0.00% 0.00%
Other Expenses (as a percentage of Assets): 0.27% [1] 0.28% [1] 0.19% 0.18% 0.43%
Expenses (as a percentage of Assets) 0.92% 0.68% 0.74% 0.58% 0.83%
Fee Waiver or Reimbursement [2] (0.13%) (0.13%) (0.14%) (0.13%) (0.13%)
Net Expenses (as a percentage of Assets) 0.79% 0.55% 0.60% 0.45% 0.70%
Fee Waiver or Reimbursement over Assets, Date of Termination July 31, 2026 July 31, 2026 July 31, 2026 July 31, 2026 July 31, 2026
[1]

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

Under the Fund’s expense reimbursement arrangements, the Fund’s investment adviser, Teachers Advisors, LLC, has contractually agreed to reimburse the Fund for any Total annual Fund operating expenses (excluding interest, taxes, brokerage commissions or other transactional expenses, Acquired fund fees and expenses and extraordinary expenses) that exceed: (i) 0.80% of average daily net assets for Class A shares; (ii) 0.60% of average daily net assets for Class I shares; (iii) 0.60% of average daily net assets for Premier Class shares; (iv) 0.45% of average daily net assets for Class R6 shares; and (v) 0.70% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least July 31, 2026, unless changed with approval of the Board of Trustees.
Expense Example [Heading] Example
Expense Example Narrative [Text Block]

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

Expense Example, With Redemption [Table]
Expense Example - Nuveen Green Bond Fund - USD ($)
Class A
Class I
Premier Class
Class R6
Retirement Class
Expense Example, with Redemption, 1 Year $ 453 $ 56 $ 61 $ 46 $ 72
Expense Example, with Redemption, 3 Years 645 204 222 173 252
Expense Example, with Redemption, 5 Years 853 366 398 311 448
Expense Example, with Redemption, 10 Years $ 1,452 $ 834 $ 905 $ 713 $ 1,013
Portfolio Turnover [Heading] Portfolio turnover
Portfolio Turnover [Text Block]

The Fund pays transaction costs, such as commissions, as applicable, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s

performance. During the fiscal year ended March 31, 2025, the Fund’s portfolio turnover rate was 41% of the average value of its portfolio.
Portfolio Turnover, Rate 41.00%
Nuveen Green Bond Fund | Class A  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimates for the current fiscal year.
Nuveen Green Bond Fund | Class I  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimates for the current fiscal year.
Nuveen High Yield Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and expenses
Expense Narrative [Text Block]

The following tables describe the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund or other Nuveen mutual funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial advisor and in “How You Can Buy and Sell Shares” on page 172 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 103 of the Fund’s Statement of Additional Information. In addition, more information about sales charge discounts and waivers for purchases of shares through specific financial intermediaries is set forth in the appendix to the Fund’s Prospectus entitled “Variations in Sales Charge Reductions and Waivers Available Through Certain Intermediaries.

The tables and examples below do not reflect any commissions that shareholders may be required to pay directly to their financial intermediaries when buying or selling Class I shares.
Shareholder Fees Caption [Optional Text] SHAREHOLDER FEES (fees paid directly from your investment)
Shareholder Fees [Table]
Shareholder Fees - Nuveen High Yield Fund - USD ($)
Class A
Class I
Premier Class
Class R6
Retirement Class
Class W
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 4.75% 0.00% 0.00% 0.00% 0.00% 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%
Shareholder Fee, Other $ 15.00 $ 0 $ 0 $ 0 $ 0 $ 0
Operating Expenses Caption [Optional Text] ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
Annual Fund Operating Expenses - Nuveen High Yield Fund
Class A
Class I
Premier Class
Class R6
Retirement Class
Class W
Management Fees (as a percentage of Assets) 0.34% 0.34% 0.34% 0.34% 0.34% 0.34%
Distribution and Service (12b-1) Fees 0.25% 0.00% 0.15% 0.00% 0.00% 0.00%
Other Expenses (as a percentage of Assets): 0.11% [1] 0.16% 0.02% 0.02% 0.27% 0.02%
Expenses (as a percentage of Assets) 0.70% 0.50% 0.51% 0.36% 0.61% 0.36%
Fee Waiver or Reimbursement [2] 0.00% 0.00% 0.00% 0.00% 0.00% (0.36%) [3]
Net Expenses (as a percentage of Assets) 0.70% 0.50% 0.51% 0.36% 0.61% 0.00%
Fee Waiver or Reimbursement over Assets, Date of Termination July 31, 2026 July 31, 2026 July 31, 2026 July 31, 2026 July 31, 2026 July 31, 2026
[1]

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

Under the Fund’s expense reimbursement arrangements, the Fund’s investment adviser, Teachers Advisors, LLC, has contractually agreed to reimburse the Fund for any Total annual Fund operating expenses (excluding interest, taxes, brokerage commissions or other transactional expenses, Acquired fund fees and expenses and extraordinary expenses) that exceed: (i) 0.75% of average daily net assets for Class A shares; (ii) 0.55% of average daily net assets for Class I shares; (iii) 0.55% of average daily net assets for Premier Class shares; (iv) 0.40% of average daily net assets for Class R6 shares; (v) 0.65% of average daily net assets for Retirement Class shares; and (vi) 0.40% of average daily net assets for Class W shares of the Fund. These expense reimbursement arrangements will continue through at least July 31, 2026, unless changed with approval of the Board of Trustees.
[3]

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

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

Expense Example, With Redemption [Table]
Expense Example - Nuveen High Yield Fund - USD ($)
Class A
Class I
Premier Class
Class R6
Retirement Class
Class W
Expense Example, with Redemption, 1 Year $ 543 $ 51 $ 52 $ 37 $ 62 $ 0
Expense Example, with Redemption, 3 Years 688 160 164 116 195 0
Expense Example, with Redemption, 5 Years 846 280 285 202 340 0
Expense Example, with Redemption, 10 Years $ 1,304 $ 628 $ 640 $ 456 $ 762 $ 0
Portfolio Turnover [Heading] Portfolio turnover
Portfolio Turnover [Text Block]

The Fund pays transaction costs, such as commissions, as applicable, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s performance. During the fiscal year ended March 31, 2025, the Fund’s portfolio turnover rate was 61% of the average value of its portfolio.
Portfolio Turnover, Rate 61.00%
Nuveen High Yield Fund | Class A  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimates for the current fiscal year.
Nuveen Short Duration Impact Bond Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and expenses
Expense Narrative [Text Block]

The following tables describe the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund or other Nuveen mutual funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial advisor and in “How You Can Buy and Sell Shares” on page 172 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 103 of the Fund’s Statement of Additional Information. In addition, more information about sales charge discounts and waivers for purchases of shares through specific financial intermediaries is set forth in the appendix to the Fund’s Prospectus entitled “Variations in Sales Charge Reductions and Waivers Available Through Certain Intermediaries.

The tables and examples below do not reflect any commissions that shareholders may be required to pay directly to their financial intermediaries when buying or selling Class I shares.
Shareholder Fees Caption [Optional Text] SHAREHOLDER FEES (fees paid directly from your investment)
Shareholder Fees [Table]
Shareholder Fees - Nuveen Short Duration Impact Bond Fund - USD ($)
Class A
Class I
Premier Class
Class R6
Retirement Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 2.50% 0.00% 0.00% 0.00% 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) 0.00% 0.00% 0.00% 0.00% 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00% 0.00% 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00% 0.00% 0.00% 0.00%
Shareholder Fee, Other $ 15.00 $ 0 $ 0 $ 0 $ 0
Operating Expenses Caption [Optional Text] ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
Annual Fund Operating Expenses - Nuveen Short Duration Impact Bond Fund
Class A
Class I
Premier Class
Class R6
Retirement Class
Management Fees (as a percentage of Assets) 0.30% 0.30% 0.30% 0.30% 0.30%
Distribution and Service (12b-1) Fees 0.25% 0.00% 0.15% 0.00% 0.00%
Other Expenses (as a percentage of Assets): 0.38% [1] 0.33% 0.31% 0.31% 0.56%
Expenses (as a percentage of Assets) 0.93% 0.63% 0.76% 0.61% 0.86%
Fee Waiver or Reimbursement [2] (0.26%) (0.26%) (0.26%) (0.26%) (0.26%)
Net Expenses (as a percentage of Assets) 0.67% 0.37% 0.50% 0.35% 0.60%
Fee Waiver or Reimbursement over Assets, Date of Termination July 31, 2026 July 31, 2026 July 31, 2026 July 31, 2026 July 31, 2026
[1]

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

Under the Fund’s expense reimbursement arrangements, the Fund’s investment adviser, Teachers Advisors, LLC, has contractually agreed to reimburse the Fund for any Total annual Fund operating expenses (excluding interest, taxes, brokerage commissions or other transactional expenses, Acquired fund fees and expenses and extraordinary expenses) that exceed: (i) 0.70% of average daily net assets for Class A shares; (ii) 0.50% of average daily net assets for Class I shares; (iii) 0.50% of average daily net assets for Premier Class shares; (iv) 0.35% of average daily net assets for Class R6 shares; and (v) 0.60% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least July 31, 2026, unless changed with approval of the Board of Trustees.
Expense Example [Heading] Example
Expense Example Narrative [Text Block]

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

Expense Example, With Redemption [Table]
Expense Example - Nuveen Short Duration Impact Bond Fund - USD ($)
Class A
Class I
Premier Class
Class R6
Retirement Class
Expense Example, with Redemption, 1 Year $ 317 $ 38 $ 51 $ 36 $ 61
Expense Example, with Redemption, 3 Years 514 176 217 169 248
Expense Example, with Redemption, 5 Years 727 325 397 314 451
Expense Example, with Redemption, 10 Years $ 1,341 $ 762 $ 918 $ 737 $ 1,037
Portfolio Turnover [Heading] Portfolio turnover
Portfolio Turnover [Text Block]

The Fund pays transaction costs, such as commissions, as applicable, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s

performance. During the fiscal year ended March 31, 2025, the Fund’s portfolio turnover rate was 139% of the average value of its portfolio.
Portfolio Turnover, Rate 139.00%
Nuveen Short Duration Impact Bond Fund | Class A  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimates for the current fiscal year.
Nuveen Short Term Bond Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and expenses
Expense Narrative [Text Block]

The following tables describe the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund or other Nuveen mutual funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial advisor and in “How You Can Buy and Sell Shares” on page 172 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 103 of the Fund’s Statement of Additional Information. In addition, more information about sales charge discounts and waivers for purchases of shares through specific financial intermediaries is set forth in the appendix to the Fund’s Prospectus entitled “Variations in Sales Charge Reductions and Waivers Available Through Certain Intermediaries.

The tables and examples below do not reflect any commissions that shareholders may be required to pay directly to their financial intermediaries when buying or selling Class I shares.
Shareholder Fees Caption [Optional Text] SHAREHOLDER FEES (fees paid directly from your investment)
Shareholder Fees [Table]
Shareholder Fees - Nuveen Short Term Bond Fund - USD ($)
Class A
Class I
Premier Class
Class R6
Retirement Class
Class W
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 2.50% 0.00% 0.00% 0.00% 0.00% 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%
Shareholder Fee, Other $ 15.00 $ 0 $ 0 $ 0 $ 0 $ 0
Operating Expenses Caption [Optional Text] ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
Annual Fund Operating Expenses - Nuveen Short Term Bond Fund
Class A
Class I
Premier Class
Class R6
Retirement Class
Class W
Management Fees (as a percentage of Assets) 0.25% 0.25% 0.25% 0.25% 0.25% 0.25%
Distribution and Service (12b-1) Fees 0.25% 0.00% 0.15% 0.00% 0.00% 0.00%
Other Expenses (as a percentage of Assets): 0.12% [1] 0.07% 0.02% 0.02% 0.26% 0.01%
Expenses (as a percentage of Assets) 0.62% 0.32% 0.42% 0.27% 0.51% 0.26%
Fee Waiver or Reimbursement [2] 0.00% 0.00% 0.00% 0.00% 0.00% (0.26%) [3]
Net Expenses (as a percentage of Assets) 0.62% 0.32% 0.42% 0.27% 0.51% 0.00%
Fee Waiver or Reimbursement over Assets, Date of Termination July 31, 2026 July 31, 2026 July 31, 2026 July 31, 2026 July 31, 2026 July 31, 2026
[1]

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

Under the Fund’s expense reimbursement arrangements, the Fund’s investment adviser, Teachers Advisors, LLC, has contractually agreed to reimburse the Fund for any Total annual Fund operating expenses (excluding interest, taxes, brokerage commissions or other transactional expenses, Acquired fund fees and expenses and extraordinary expenses) that exceed: (i) 0.65% of average daily net assets for Class A shares; (ii) 0.45% of average daily net assets for Class I shares; (iii) 0.45% of average daily net assets for Premier Class shares; (iv) 0.30% of average daily net assets for Class R6 shares; (v) 0.55% of average daily net assets for Retirement Class shares; and (vi) 0.30% of average daily net assets for Class W shares of the Fund. These expense reimbursement arrangements will continue through at least July 31, 2026, unless changed with approval of the Board of Trustees.
[3]

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

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

Expense Example, With Redemption [Table]
Expense Example - Nuveen Short Term Bond Fund - USD ($)
Class A
Class I
Premier Class
Class R6
Retirement Class
Class W
Expense Example, with Redemption, 1 Year $ 312 $ 33 $ 43 $ 28 $ 52 $ 0
Expense Example, with Redemption, 3 Years 444 103 135 87 164 0
Expense Example, with Redemption, 5 Years 587 180 235 152 285 0
Expense Example, with Redemption, 10 Years $ 1,005 $ 406 $ 530 $ 343 $ 640 $ 0
Portfolio Turnover [Heading] Portfolio turnover
Portfolio Turnover [Text Block]

The Fund pays transaction costs, such as commissions, as applicable, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s performance. During the fiscal year ended March 31, 2025, the Fund’s portfolio turnover rate was 182% of the average value of its portfolio.
Portfolio Turnover, Rate 182.00%
Nuveen Short Term Bond Fund | Class A  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimates for the current fiscal year.
Nuveen Short Term Bond Index Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and expenses
Expense Narrative [Text Block]

The following tables describe the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund or other Nuveen mutual funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial advisor and in “How You Can Buy and Sell Shares” on page 172 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 103 of the Fund’s Statement of Additional Information. In addition, more information about sales charge discounts and waivers for purchases of shares through specific financial intermediaries is set forth in the appendix to the Fund’s Prospectus entitled “Variations in Sales Charge Reductions and Waivers Available Through Certain Intermediaries.

The tables and examples below do not reflect any commissions that shareholders may be required to pay directly to their financial intermediaries when buying or selling Class I shares.
Shareholder Fees Caption [Optional Text] SHAREHOLDER FEES (fees paid directly from your investment)
Shareholder Fees [Table]
Shareholder Fees - Nuveen Short Term Bond Index Fund - USD ($)
Class A
Class I
Premier Class
Class R6
Retirement Class
Class W
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 2.50% 0.00% 0.00% 0.00% 0.00% 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%
Shareholder Fee, Other $ 15.00 $ 0 $ 0 $ 0 $ 0 $ 0
Operating Expenses Caption [Optional Text] ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
Annual Fund Operating Expenses - Nuveen Short Term Bond Index Fund
Class A
Class I
Premier Class
Class R6
Retirement Class
Class W
Management Fees (as a percentage of Assets) 0.05% 0.05% 0.05% 0.05% 0.05% 0.05%
Distribution and Service (12b-1) Fees 0.25% 0.00% 0.15% 0.00% 0.00% 0.00%
Other Expenses (as a percentage of Assets): 0.15% [1] 0.16% 0.04% 0.02% 0.27% 0.02%
Expenses (as a percentage of Assets) 0.45% 0.21% 0.24% 0.07% 0.32% 0.07%
Fee Waiver or Reimbursement [2] 0.00% 0.00% 0.00% 0.00% 0.00% (0.07%) [3]
Net Expenses (as a percentage of Assets) 0.45% 0.21% 0.24% 0.07% 0.32% 0.00%
Fee Waiver or Reimbursement over Assets, Date of Termination July 31, 2026 July 31, 2026 July 31, 2026 July 31, 2026 July 31, 2026 July 31, 2026
[1]

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

Under the Fund’s expense reimbursement arrangements, the Fund’s investment adviser, Teachers Advisors, LLC, has contractually agreed to reimburse the Fund for any Total annual Fund operating expenses (excluding interest, taxes, brokerage commissions or other transactional expenses, Acquired fund fees and expenses and extraordinary expenses) that exceed: (i) 0.45% of average daily net assets for Class A shares; (ii) 0.25% of average daily net assets for Class I shares; (iii) 0.25% of average daily net assets for Premier Class shares; (iv) 0.10% of average daily net assets for Class R6 shares; (v) 0.35% of average daily net assets for Retirement Class shares; and (vi) 0.10% of average daily net assets for Class W shares of the Fund. These expense reimbursement arrangements will continue through at least July 31, 2026, unless changed with approval of the Board of Trustees.
[3]

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

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

Expense Example, With Redemption [Table]
Expense Example - Nuveen Short Term Bond Index Fund - USD ($)
Class A
Class I
Premier Class
Class R6
Retirement Class
Class W
Expense Example, with Redemption, 1 Year $ 295 $ 22 $ 25 $ 7 $ 33 $ 0
Expense Example, with Redemption, 3 Years 391 68 77 23 103 0
Expense Example, with Redemption, 5 Years 496 118 135 40 180 0
Expense Example, with Redemption, 10 Years $ 803 $ 268 $ 306 $ 90 $ 406 $ 0
Portfolio Turnover [Heading] Portfolio turnover
Portfolio Turnover [Text Block]

The Fund pays transaction costs, such as commissions, as applicable, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s performance. During the fiscal year ended March 31, 2025, the Fund’s portfolio turnover rate was 55% of the average value of its portfolio.
Portfolio Turnover, Rate 55.00%
Nuveen Short Term Bond Index Fund | Class A  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimates for the current fiscal year.
Nuveen Money Market Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and expenses
Expense Narrative [Text Block]

The following tables describe the fees and expenses that you may pay if you buy, hold and sell shares of the Fund.

The tables and examples below do not reflect any commissions that shareholders may be required to pay directly to their financial intermediaries when buying or selling Class I shares.
Shareholder Fees Caption [Optional Text] SHAREHOLDER FEES (fees paid directly from your investment)
Shareholder Fees [Table]
Shareholder Fees - Nuveen Money Market Fund - USD ($)
Class A
Class I
Premier Class
Class R6
Retirement Class
Class W
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%
Shareholder Fee, Other $ 15.00 $ 0 $ 0 $ 0 $ 0 $ 0
Operating Expenses Caption [Optional Text] ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
Annual Fund Operating Expenses - Nuveen Money Market Fund
Class A
Class I
Premier Class
Class R6
Retirement Class
Class W
Management Fees (as a percentage of Assets) 0.10% 0.10% 0.10% 0.10% 0.10% 0.10%
Distribution and Service (12b-1) Fees 0.25% 0.00% 0.15% 0.00% 0.00% 0.00%
Other Expenses (as a percentage of Assets): 0.13% [1] 0.08% 0.02% 0.02% 0.27% 0.02% [2]
Expenses (as a percentage of Assets) 0.48% 0.18% 0.27% 0.12% 0.37% 0.12%
Fee Waiver or Reimbursement [3] 0.00% 0.00% 0.00% 0.00% 0.00% (0.12%) [4]
Net Expenses (as a percentage of Assets) 0.48% 0.18% 0.27% 0.12% 0.37% 0.00%
Fee Waiver or Reimbursement over Assets, Date of Termination July 31, 2026 July 31, 2026 July 31, 2026 July 31, 2026 July 31, 2026 July 31, 2026
[1]

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

Estimate is for the current fiscal year.
[3]

Under the Fund’s expense reimbursement arrangements, the Fund’s investment adviser, Teachers Advisors, LLC, has contractually agreed to reimburse the Fund for any Total annual Fund operating expenses (excluding interest, taxes, brokerage commissions or other transactional expenses, Acquired fund fees and expenses and extraordinary expenses) that exceed: (i) 0.50% of average daily net assets for Class A shares; (ii) 0.30% of average daily net assets for Class I shares; (iii) 0.30% of average daily net assets for Premier Class shares; (iv) 0.15% of average daily net assets for Class R6 shares; (v) 0.40% of average daily net assets for Retirement Class shares; and (vi) 0.15% of average daily net assets for Class W shares of the Fund. These expense reimbursement arrangements will continue through at least July 31, 2026, unless changed with approval of the Board of Trustees.
[4]

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

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

Expense Example, With Redemption [Table]
Expense Example - Nuveen Money Market Fund - USD ($)
Class A
Class I
Premier Class
Class R6
Retirement Class
Class W
Expense Example, with Redemption, 1 Year $ 49 $ 18 $ 28 $ 12 $ 38 $ 0
Expense Example, with Redemption, 3 Years 154 58 87 39 119 0
Expense Example, with Redemption, 5 Years 269 101 152 68 208 0
Expense Example, with Redemption, 10 Years $ 604 $ 230 $ 343 $ 154 $ 468 $ 0
Nuveen Money Market Fund | Class A  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimates for the current fiscal year.
Nuveen Money Market Fund | Class W  
Prospectus [Line Items]  
Other Expenses, New Fund, Based on Estimates [Text] Estimate is for the current fiscal year.