v3.26.1
Fees and Expenses
Mar. 31, 2026
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 pay other fees, such as brokerage commissions and other fees to financial intermediaries, when buying or selling shares of the Fund, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund or other Nuveen mutual funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial advisor and in “How You Can Buy and Sell Shares” on page 173 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 106 of the Fund’s Statement of Additional Information. In addition, more information about sales charge discounts and waivers for purchases of shares through specific financial intermediaries is set forth in the appendix to the Fund’s Prospectus entitled “Variations in Sales Charge Reductions and Waivers Available Through Certain Intermediaries.
Shareholder Fees Caption [Optional Text] SHAREHOLDER FEES (fees paid directly from your investment)
Shareholder Fees [Table]
Shareholder Fees - Nuveen Bond Index Fund - USD ($)
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): 0.09% 0.11% 0.01% 0.01% 0.26% 0.01%
Expenses (as a percentage of Assets) 0.40% 0.17% 0.22% 0.07% 0.32% 0.07%
Fee Waiver or Reimbursement [1] 0.00% 0.00% 0.00% 0.00% 0.00% (0.07%) [2]
Net Expenses (as a percentage of Assets) 0.40% 0.17% 0.22% 0.07% 0.32% 0.00%
Fee Waiver or Reimbursement over Assets, Date of Termination July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027
[1]

Under the Fund’s expense reimbursement arrangements, the Fund’s investment adviser, Nuveen Fund Advisors, LLC (“Nuveen Fund Advisors”), 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, 2027, unless changed with approval of the Board of Trustees.
[2]

Nuveen Fund Advisors 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. Nuveen Fund Advisors 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 $ 414 $ 17 $ 23 $ 7 $ 33 $ 0
Expense Example, with Redemption, 3 Years 499 55 71 23 103 0
Expense Example, with Redemption, 5 Years 591 96 124 40 180 0
Expense Example, with Redemption, 10 Years $ 861 $ 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, 2026, the Fund’s portfolio turnover rate was 28% of the average value of its portfolio.
Portfolio Turnover, Rate 28.00%
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 pay other fees, such as brokerage commissions and other fees to financial intermediaries, when buying or selling shares of the Fund, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund or other Nuveen mutual funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial advisor and in “How You Can Buy and Sell Shares” on page 173 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 106 of the Fund’s Statement of Additional Information. In addition, more information about sales charge discounts and waivers for purchases of shares through specific financial intermediaries is set forth in the appendix to the Fund’s Prospectus entitled “Variations in Sales Charge Reductions and Waivers Available Through Certain Intermediaries.
Shareholder Fees Caption [Optional Text] SHAREHOLDER FEES (fees paid directly from your investment)
Shareholder Fees [Table]
Shareholder Fees - Nuveen Core Bond Fund - USD ($)
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): 0.08% 0.16% 0.01% 0.01% 0.26% 0.01%
Expenses (as a percentage of Assets) 0.60% 0.43% 0.43% 0.28% 0.53% 0.28%
Fee Waiver or Reimbursement [1] 0.00% 0.00% 0.00% 0.00% 0.00% (0.28%) [2]
Net Expenses (as a percentage of Assets) 0.60% 0.43% 0.43% 0.28% 0.53% 0.00%
Fee Waiver or Reimbursement over Assets, Date of Termination July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027
[1]

Under the Fund’s expense reimbursement arrangements, the Fund’s investment adviser, Nuveen Fund Advisors, LLC (“Nuveen Fund Advisors”), 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, 2027, unless changed with approval of the Board of Trustees.
[2]

Nuveen Fund Advisors 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. Nuveen Fund Advisors 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 $ 434 $ 44 $ 44 $ 29 $ 54 $ 0
Expense Example, with Redemption, 3 Years 560 138 138 90 170 0
Expense Example, with Redemption, 5 Years 697 241 241 157 296 0
Expense Example, with Redemption, 10 Years $ 1,097 $ 542 $ 542 $ 356 $ 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, 2026, the Fund’s portfolio turnover rate was 113% of the average value of its portfolio.
Portfolio Turnover, Rate 113.00%
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 pay other fees, such as brokerage commissions and other fees to financial intermediaries, when buying or selling shares of the Fund, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund or other Nuveen mutual funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial advisor and in “How You Can Buy and Sell Shares” on page 173 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 106 of the Fund’s Statement of Additional Information. In addition, more information about sales charge discounts and waivers for purchases of shares through specific financial intermediaries is set forth in the appendix to the Fund’s Prospectus entitled “Variations in Sales Charge Reductions and Waivers Available Through Certain Intermediaries.
Shareholder Fees Caption [Optional Text] SHAREHOLDER FEES (fees paid directly from your investment)
Shareholder Fees [Table]
Shareholder Fees - Nuveen Core Impact Bond Fund - USD ($)
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% 0.02% 0.02% 0.27%
Expenses (as a percentage of Assets) 0.67% 0.41% 0.50% 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% 0.50% 0.35% 0.60%
Fee Waiver or Reimbursement over Assets, Date of Termination July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027
[1]

Under the Fund’s expense reimbursement arrangements, the Fund’s investment adviser, Nuveen Fund Advisors, LLC (“Nuveen Fund Advisors”), 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, 2027, 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 $ 51 $ 36 $ 61
Expense Example, with Redemption, 3 Years 581 132 160 113 192
Expense Example, with Redemption, 5 Years 734 230 280 197 335
Expense Example, with Redemption, 10 Years $ 1,178 $ 518 $ 628 $ 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, 2026, the Fund’s portfolio turnover rate was 143% of the average value of its portfolio.
Portfolio Turnover, Rate 143.00%
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 pay other fees, such as brokerage commissions and other fees to financial intermediaries, when buying or selling shares of the Fund, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund or other Nuveen mutual funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial advisor and in “How You Can Buy and Sell Shares” on page 173 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 106 of the Fund’s Statement of Additional Information. In addition, more information about sales charge discounts and waivers for purchases of shares through specific financial intermediaries is set forth in the appendix to the Fund’s Prospectus entitled “Variations in Sales Charge Reductions and Waivers Available Through Certain Intermediaries.
Shareholder Fees Caption [Optional Text] SHAREHOLDER FEES (fees paid directly from your investment)
Shareholder Fees [Table]
Shareholder Fees - Nuveen Core Plus Bond Fund - USD ($)
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): 0.10% 0.09% 0.02% 0.02% 0.27% 0.02%
Expenses (as a percentage of Assets) 0.63% 0.37% 0.45% 0.30% 0.55% 0.30%
Fee Waiver or Reimbursement [1] 0.00% (0.01%) 0.00% (0.01%) (0.01%) (0.30%) [2]
Net Expenses (as a percentage of Assets) 0.63% 0.36% 0.45% 0.29% 0.54% 0.00%
Fee Waiver or Reimbursement over Assets, Date of Termination July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027
[1]

Under the Fund’s expense reimbursement arrangements, the Fund’s investment adviser, Nuveen Fund Advisors, LLC (“Nuveen Fund Advisors”), 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, 2027, unless changed with approval of the Board of Trustees.
[2]

Nuveen Fund Advisors 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. Nuveen Fund Advisors 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 $ 437 $ 37 $ 46 $ 30 $ 55 $ 0
Expense Example, with Redemption, 3 Years 569 118 144 95 175 0
Expense Example, with Redemption, 5 Years 713 207 252 168 306 0
Expense Example, with Redemption, 10 Years $ 1,132 $ 467 $ 567 $ 380 $ 688 $ 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, 2026, the Fund’s portfolio turnover rate was 121% of the average value of its portfolio.
Portfolio Turnover, Rate 121.00%
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 pay other fees, such as brokerage commissions and other fees to financial intermediaries, when buying or selling shares of the Fund, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund or other Nuveen mutual funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial advisor and in “How You Can Buy and Sell Shares” on page 173 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 106 of the Fund’s Statement of Additional Information. In addition, more information about sales charge discounts and waivers for purchases of shares through specific financial intermediaries is set forth in the appendix to the Fund’s Prospectus entitled “Variations in Sales Charge Reductions and Waivers Available Through Certain Intermediaries.
Shareholder Fees Caption [Optional Text] SHAREHOLDER FEES (fees paid directly from your investment)
Shareholder Fees [Table]
Shareholder Fees - Nuveen 5-15 Year Laddered Tax Exempt Bond Fund - USD ($)
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): 0.13% 0.20% [1] 0.09%
Expenses (as a percentage of Assets) 0.63% 0.45% 0.34%
Fee Waiver or Reimbursement [2] (0.04%) (0.04%) (0.04%)
Net Expenses (as a percentage of Assets) 0.59% 0.41% 0.30%
Fee Waiver or Reimbursement over Assets, Date of Termination July 31, 2027 July 31, 2027 July 31, 2027
[1]

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

Under the Fund’s expense reimbursement arrangements, the Fund’s investment adviser, Nuveen Fund Advisors, LLC (“Nuveen Fund Advisors”), 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, 2027, 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 $ 358 $ 42 $ 31
Expense Example, with Redemption, 3 Years 492 140 105
Expense Example, with Redemption, 5 Years 637 248 187
Expense Example, with Redemption, 10 Years $ 1,059 $ 563 $ 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, 2026, the Fund’s portfolio turnover rate was 14% of the average value of its portfolio.
Portfolio Turnover, Rate 14.00%
Nuveen 5-15 Year Laddered Tax Exempt Bond Fund | Class I  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate 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 pay other fees, such as brokerage commissions and other fees to financial intermediaries, when buying or selling shares of the Fund, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund or other Nuveen mutual funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial advisor and in “How You Can Buy and Sell Shares” on page 173 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 106 of the Fund’s Statement of Additional Information. In addition, more information about sales charge discounts and waivers for purchases of shares through specific financial intermediaries is set forth in the appendix to the Fund’s Prospectus entitled “Variations in Sales Charge Reductions and Waivers Available Through Certain Intermediaries.
Shareholder Fees Caption [Optional Text] SHAREHOLDER FEES (fees paid directly from your investment)
Shareholder Fees [Table]
Shareholder Fees - Nuveen Green Bond Fund - USD ($)
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): 0.23% 0.23% 0.15% 0.15% 0.40%
Expenses (as a percentage of Assets) 0.88% 0.63% 0.70% 0.55% 0.80%
Fee Waiver or Reimbursement [1] (0.12%) (0.12%) (0.13%) (0.13%) (0.13%)
Net Expenses (as a percentage of Assets) 0.76% 0.51% 0.57% 0.42% 0.67%
Fee Waiver or Reimbursement over Assets, Date of Termination July 31, 2028 July 31, 2028 July 31, 2028 July 31, 2028 July 31, 2028
[1]

Under the Fund’s expense reimbursement arrangements, the Fund’s investment adviser, Nuveen Fund Advisors, LLC (“Nuveen Fund Advisors”), 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, 2028, unless changed with approval of the Board of Trustees. Nuveen Fund Advisors, LLC has also agreed to waive fees and/or reimburse expenses to reduce the maximum Total annual operating expenses detailed above for each class of the Fund by 0.03%. This waiver and/or reimbursement arrangement may be terminated or modified prior to July 31, 2028 only 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 $ 450 $ 52 $ 58 $ 43 $ 68
Expense Example, with Redemption, 3 Years 634 190 211 163 242
Expense Example, with Redemption, 5 Years 833 339 377 294 431
Expense Example, with Redemption, 10 Years $ 1,408 $ 775 $ 858 $ 677 $ 978
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, 2026, the Fund’s portfolio turnover rate was 31% of the average value of its portfolio.
Portfolio Turnover, Rate 31.00%
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 pay other fees, such as brokerage commissions and other fees to financial intermediaries, when buying or selling shares of the Fund, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund or other Nuveen mutual funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial advisor and in “How You Can Buy and Sell Shares” on page 173 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 106 of the Fund’s Statement of Additional Information. In addition, more information about sales charge discounts and waivers for purchases of shares through specific financial intermediaries is set forth in the appendix to the Fund’s Prospectus entitled “Variations in Sales Charge Reductions and Waivers Available Through Certain Intermediaries.
Shareholder Fees Caption [Optional Text] SHAREHOLDER FEES (fees paid directly from your investment)
Shareholder Fees [Table]
Shareholder Fees - Nuveen High Yield Fund - USD ($)
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): 0.09% 0.16% 0.02% 0.02% 0.27% 0.02%
Expenses (as a percentage of Assets) 0.68% 0.50% 0.51% 0.36% 0.61% 0.36%
Fee Waiver or Reimbursement [1] 0.00% 0.00% 0.00% 0.00% 0.00% (0.36%) [2]
Net Expenses (as a percentage of Assets) 0.68% 0.50% 0.51% 0.36% 0.61% 0.00%
Fee Waiver or Reimbursement over Assets, Date of Termination July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027
[1]

Under the Fund’s expense reimbursement arrangements, the Fund’s investment adviser, Nuveen Fund Advisors, LLC (“Nuveen Fund Advisors”), 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, 2027, unless changed with approval of the Board of Trustees.
[2]

Nuveen Fund Advisors 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. Nuveen Fund Advisors 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 $ 541 $ 51 $ 52 $ 37 $ 62 $ 0
Expense Example, with Redemption, 3 Years 682 160 164 116 195 0
Expense Example, with Redemption, 5 Years 836 280 285 202 340 0
Expense Example, with Redemption, 10 Years $ 1,281 $ 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, 2026, the Fund’s portfolio turnover rate was 48% of the average value of its portfolio.
Portfolio Turnover, Rate 48.00%
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 pay other fees, such as brokerage commissions and other fees to financial intermediaries, when buying or selling shares of the Fund, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund or other Nuveen mutual funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial advisor and in “How You Can Buy and Sell Shares” on page 173 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 106 of the Fund’s Statement of Additional Information. In addition, more information about sales charge discounts and waivers for purchases of shares through specific financial intermediaries is set forth in the appendix to the Fund’s Prospectus entitled “Variations in Sales Charge Reductions and Waivers Available Through Certain Intermediaries.
Shareholder Fees Caption [Optional Text] SHAREHOLDER FEES (fees paid directly from your investment)
Shareholder Fees [Table]
Shareholder Fees - Nuveen Short Duration Impact Bond Fund - USD ($)
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): 0.21% 0.18% 0.15% 0.14% 0.39%
Expenses (as a percentage of Assets) 0.76% 0.48% 0.60% 0.44% 0.69%
Fee Waiver or Reimbursement [1] (0.10%) (0.10%) (0.11%) (0.10%) (0.10%)
Net Expenses (as a percentage of Assets) 0.66% 0.38% 0.49% 0.34% 0.59%
Fee Waiver or Reimbursement over Assets, Date of Termination July 31, 2028 July 31, 2028 July 31, 2028 July 31, 2028 July 31, 2028
[1]

Under the Fund’s expense reimbursement arrangements, the Fund’s investment adviser, Nuveen Fund Advisors, LLC (“Nuveen Fund Advisors”), 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, 2028, unless changed with approval of the Board of Trustees. Nuveen Fund Advisors, LLC has also agreed to waive fees and/or reimburse expenses to reduce the maximum Total annual operating expenses detailed above for each class of the Fund by 0.01%. This waiver and/or reimbursement arrangement may be terminated or modified prior to July 31, 2028 only 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 $ 316 $ 39 $ 50 $ 35 $ 60
Expense Example, with Redemption, 3 Years 477 144 181 131 211
Expense Example, with Redemption, 5 Years 652 259 324 236 374
Expense Example, with Redemption, 10 Years $ 1,160 $ 594 $ 740 $ 545 $ 849
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, 2026, the Fund’s portfolio turnover rate was 305% of the average value of its portfolio.
Portfolio Turnover, Rate 305.00%
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 pay other fees, such as brokerage commissions and other fees to financial intermediaries, when buying or selling shares of the Fund, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund or other Nuveen mutual funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial advisor and in “How You Can Buy and Sell Shares” on page 173 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 106 of the Fund’s Statement of Additional Information. In addition, more information about sales charge discounts and waivers for purchases of shares through specific financial intermediaries is set forth in the appendix to the Fund’s Prospectus entitled “Variations in Sales Charge Reductions and Waivers Available Through Certain Intermediaries.
Shareholder Fees Caption [Optional Text] SHAREHOLDER FEES (fees paid directly from your investment)
Shareholder Fees [Table]
Shareholder Fees - Nuveen Short Term Bond Fund - USD ($)
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) 0.24% 0.24% 0.24% 0.24% 0.24% 0.24%
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): 0.10% 0.05% 0.02% 0.02% 0.27% 0.02%
Expenses (as a percentage of Assets) 0.59% 0.29% 0.41% 0.26% 0.51% 0.26%
Fee Waiver or Reimbursement [1] 0.00% 0.00% 0.00% 0.00% 0.00% (0.26%) [2]
Net Expenses (as a percentage of Assets) 0.59% 0.29% 0.41% 0.26% 0.51% 0.00%
Fee Waiver or Reimbursement over Assets, Date of Termination July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027
[1]

Under the Fund’s expense reimbursement arrangements, the Fund’s investment adviser, Nuveen Fund Advisors, LLC (“Nuveen Fund Advisors”), 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, 2027, unless changed with approval of the Board of Trustees.
[2]

Nuveen Fund Advisors 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. Nuveen Fund Advisors 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 $ 309 $ 30 $ 42 $ 27 $ 52 $ 0
Expense Example, with Redemption, 3 Years 434 93 132 84 164 0
Expense Example, with Redemption, 5 Years 571 163 230 146 285 0
Expense Example, with Redemption, 10 Years $ 969 $ 368 $ 518 $ 331 $ 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, 2026, the Fund’s portfolio turnover rate was 189% of the average value of its portfolio.
Portfolio Turnover, Rate 189.00%
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 pay other fees, such as brokerage commissions and other fees to financial intermediaries, when buying or selling shares of the Fund, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund or other Nuveen mutual funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial advisor and in “How You Can Buy and Sell Shares” on page 173 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 106 of the Fund’s Statement of Additional Information. In addition, more information about sales charge discounts and waivers for purchases of shares through specific financial intermediaries is set forth in the appendix to the Fund’s Prospectus entitled “Variations in Sales Charge Reductions and Waivers Available Through Certain Intermediaries.
Shareholder Fees Caption [Optional Text] SHAREHOLDER FEES (fees paid directly from your investment)
Shareholder Fees [Table]
Shareholder Fees - Nuveen Short Term Bond Index Fund - USD ($)
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): 0.09% 0.14% 0.04% 0.02% 0.27% 0.02%
Expenses (as a percentage of Assets) 0.39% 0.19% 0.24% 0.07% 0.32% 0.07%
Fee Waiver or Reimbursement [1] 0.00% 0.00% 0.00% 0.00% 0.00% (0.07%) [2]
Net Expenses (as a percentage of Assets) 0.39% 0.19% 0.24% 0.07% 0.32% 0.00%
Fee Waiver or Reimbursement over Assets, Date of Termination July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027
[1]

Under the Fund’s expense reimbursement arrangements, the Fund’s investment adviser, Nuveen Fund Advisors, LLC (“Nuveen Fund Advisors”), 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, 2027, unless changed with approval of the Board of Trustees.
[2]

Nuveen Fund Advisors 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. Nuveen Fund Advisors 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 $ 289 $ 19 $ 25 $ 7 $ 33 $ 0
Expense Example, with Redemption, 3 Years 372 61 77 23 103 0
Expense Example, with Redemption, 5 Years 463 107 135 40 180 0
Expense Example, with Redemption, 10 Years $ 730 $ 243 $ 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, 2026, the Fund’s portfolio turnover rate was 63% of the average value of its portfolio.
Portfolio Turnover, Rate 63.00%
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. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, when buying or selling shares of the Fund, which are not reflected in the tables and examples below.
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): 0.10% 0.05% 0.02% 0.02% 0.27% 0.02% [1]
Expenses (as a percentage of Assets) 0.45% 0.15% 0.27% 0.12% 0.37% 0.12%
Fee Waiver or Reimbursement [2] 0.00% 0.00% 0.00% 0.00% 0.00% (0.12%) [3]
Net Expenses (as a percentage of Assets) 0.45% 0.15% 0.27% 0.12% 0.37% 0.00%
Fee Waiver or Reimbursement over Assets, Date of Termination July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027
[1]

Estimate is for the current fiscal year.
[2]

Under the Fund’s expense reimbursement arrangements, the Fund’s investment adviser, Nuveen Fund Advisors, LLC (“Nuveen Fund Advisors”), 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, 2027, unless changed with approval of the Board of Trustees.
[3]

Nuveen Fund Advisors 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. Nuveen Fund Advisors 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 $ 46 $ 15 $ 28 $ 12 $ 38 $ 0
Expense Example, with Redemption, 3 Years 144 48 87 39 119 0
Expense Example, with Redemption, 5 Years 252 85 152 68 208 0
Expense Example, with Redemption, 10 Years $ 567 $ 192 $ 343 $ 154 $ 468 $ 0
Nuveen Money Market Fund | Class W  
Prospectus [Line Items]  
Other Expenses, New Fund, Based on Estimates [Text] Estimate is for the current fiscal year.