v3.26.3
Fees and Expenses
May 31, 2026
Nuveen Lifecycle Retirement Income 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 in 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 295 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 84 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 Lifecycle Retirement Income Fund - USD ($)
Class A
Class I
Premier Class
Class R6
Retirement Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 5.75% 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 Lifecycle Retirement Income Fund
Class A
Class I
Premier Class
Class R6
Retirement Class
Management Fees (as a percentage of Assets) [1],[2] 0.39% 0.39% 0.39% 0.39% 0.39%
Distribution and Service (12b-1) Fees 0.25% 0.00% 0.15% 0.00% 0.00%
Other Expenses (as a percentage of Assets): [1],[2] 0.09% 0.12% 0.05% 0.04% 0.29%
Acquired Fund Fees and Expenses [2],[3] 0.14% 0.14% 0.14% 0.14% 0.14%
Expenses (as a percentage of Assets) 0.87% 0.65% 0.73% 0.57% 0.82%
Fee Waiver or Reimbursement [4],[5] (0.25%) (0.20%) (0.21%) (0.20%) (0.20%)
Net Expenses (as a percentage of Assets) 0.62% 0.45% 0.52% 0.37% 0.62%
Fee Waiver or Reimbursement over Assets, Date of Termination September 30, 2027 September 30, 2027 September 30, 2027 September 30, 2027 September 30, 2027
[1]

Portions of the Management fees and Other expenses are based on expenses originally incurred by Class W shares of the Underlying Funds (as defined below) of the Trust, which have been incurred directly by the Fund pursuant to certain contractual arrangements intended to reallocate directly to the Fund certain fees and expenses that had been paid by the Underlying Funds of the Trust. For additional information, please see the “Management of the Funds” section of this Prospectus.

[2]

Restated to reflect estimate for the current fiscal year.

[3]

“Acquired fund fees and expenses” are the Fund’s proportionate amount of the expenses of any investment companies or pools in which it invests (excluding expenses originally incurred by Class W shares of the Underlying Funds of the Trust that have been incurred directly by the Fund, which are instead reflected in Management fees and Other expenses). These expenses are not paid directly by Fund shareholders. Instead, Fund shareholders bear these expenses indirectly because they reduce Fund performance. Because “Acquired fund fees and expenses” are included in the chart above, the Fund’s operating expenses here will not correlate with the expenses included in the Financial highlights in this Prospectus and the Fund’s Form N-CSR.

[4]

Nuveen Fund Advisors has contractually agreed to waive 0.100% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2029, unless changed with the approval of the Board of Trustees. Nuveen Fund Advisors has also contractually agreed to waive an additional 0.064% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2027, unless changed with the approval of the Board of Trustees.

[5]

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, extraordinary expenses and any expenses originally attributable to Class W shares of the Underlying Funds of the Trust that were incurred directly by the Fund) that exceed: (i) 0.250% of average daily net assets for Class A shares; (ii) 0.150% of average daily net assets for Class I shares; (iii) 0.150% of average daily net assets for Premier Class shares; (iv) 0.000% of average daily net assets for Class R6 shares; and (v) 0.250% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least September 30, 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 Lifecycle Retirement Income Fund - USD ($)
Class A
Class I
Premier Class
Class R6
Retirement Class
Expense Example, with Redemption, 1 Year $ 635 $ 46 $ 53 $ 38 $ 63
Expense Example, with Redemption, 3 Years 793 166 191 141 220
Expense Example, with Redemption, 5 Years 986 321 364 277 414
Expense Example, with Redemption, 10 Years $ 1,545 $ 771 $ 866 $ 674 $ 975
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 May 31, 2026, the Fund’s portfolio turnover rate was 29% of the average value of its portfolio.

Portfolio Turnover, Rate 29.00%
Nuveen Lifecycle Retirement Income Fund | Class A  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Retirement Income Fund | Class I  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Retirement Income Fund | Premier Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Retirement Income Fund | Class R6  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Retirement Income Fund | Retirement Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2010 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 Lifecycle 2010 Fund
Class I
Premier Class
Class R6
Retirement Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 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%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00% 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00% 0.00% 0.00%
Maximum Account Fee (as a percentage of Assets) 0.00% 0.00% 0.00% 0.00%
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 Lifecycle 2010 Fund
Class I
Premier Class
Class R6
Retirement Class
Management Fees (as a percentage of Assets) [1],[2] 0.39% 0.39% 0.39% 0.39%
Distribution and Service (12b-1) Fees 0.00% 0.15% 0.00% 0.00%
Other Expenses (as a percentage of Assets): [1],[2] 0.15% 0.03% 0.03% 0.28%
Acquired Fund Fees and Expenses [2],[3] 0.12% 0.12% 0.12% 0.12%
Expenses (as a percentage of Assets) 0.66% 0.69% 0.54% 0.79%
Fee Waiver or Reimbursement [4],[5] (0.26%) (0.26%) (0.26%) (0.26%)
Net Expenses (as a percentage of Assets) 0.40% 0.43% 0.28% 0.53%
Fee Waiver or Reimbursement over Assets, Date of Termination July 31, 2028 July 31, 2028 July 31, 2028 July 31, 2028
[1]

Portions of the Management fees and Other expenses are based on expenses originally incurred by Class W shares of the Underlying Funds (as defined below) of the Trust, which have been incurred directly by the Fund pursuant to certain contractual arrangements intended to reallocate directly to the Fund certain fees and expenses that had been paid by the Underlying Funds of the Trust. For additional information, please see the “Management of the Funds” section of this Prospectus.

[2]

Restated to reflect estimate for the current fiscal year.

[3]

“Acquired fund fees and expenses” are the Fund’s proportionate amount of the expenses of any investment companies or pools in which it invests (excluding expenses originally incurred by Class W shares of the Underlying Funds of the Trust that have been incurred directly by the Fund, which are instead reflected in Management fees and Other expenses). These expenses are not paid directly by Fund shareholders. Instead, Fund shareholders bear these expenses indirectly because they reduce Fund performance. Because “Acquired fund fees and expenses” are included in the chart above, the Fund’s operating expenses here will not correlate with the expenses included in the Financial highlights in this Prospectus and the Fund’s Form N-CSR.

[4]

Nuveen Fund Advisors has contractually agreed to waive 0.100% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2029, unless changed with the approval of the Board of Trustees. Nuveen Fund Advisors has also contractually agreed to waive an additional 0.060% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2027, unless changed with the approval of the Board of Trustees.

[5]

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, extraordinary expenses and any expenses originally attributable to Class W shares of the Underlying Funds of the Trust that were incurred directly by the Fund) that exceed: (i) 0.150% of average daily net assets for Class I shares; (ii) 0.150% of average daily net assets for Premier Class shares; (iii) 0.000% of average daily net assets for Class R6 shares; and (iv) 0.250% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least September 30, 2027, unless changed with approval of the Board of Trustees. Nuveen Fund Advisors has also agreed to reimburse the Fund for 0.080% of the Total annual Fund operating expenses of each of its share classes that are originally attributable to Class W shares of the Underlying Funds of the Trust. This expense 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 Lifecycle 2010 Fund - USD ($)
Class I
Premier Class
Class R6
Retirement Class
Expense Example, with Redemption, 1 Year $ 41 $ 44 $ 29 $ 54
Expense Example, with Redemption, 3 Years 149 159 111 191
Expense Example, with Redemption, 5 Years 307 323 240 378
Expense Example, with Redemption, 10 Years $ 764 $ 800 $ 618 $ 920
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 May 31, 2026, the Fund’s portfolio turnover rate was 28% of the average value of its portfolio.

Portfolio Turnover, Rate 28.00%
Nuveen Lifecycle 2010 Fund | Class I  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2010 Fund | Premier Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2010 Fund | Class R6  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2010 Fund | Retirement Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2015 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 Lifecycle 2015 Fund
Class I
Premier Class
Class R6
Retirement Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 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%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00% 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00% 0.00% 0.00%
Maximum Account Fee (as a percentage of Assets) 0.00% 0.00% 0.00% 0.00%
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 Lifecycle 2015 Fund
Class I
Premier Class
Class R6
Retirement Class
Management Fees (as a percentage of Assets) [1],[2] 0.39% 0.39% 0.39% 0.39%
Distribution and Service (12b-1) Fees 0.00% 0.15% 0.00% 0.00%
Other Expenses (as a percentage of Assets): [1],[2] 0.10% 0.02% 0.02% 0.27%
Acquired Fund Fees and Expenses [2],[3] 0.14% 0.14% 0.14% 0.14%
Expenses (as a percentage of Assets) 0.63% 0.70% 0.55% 0.80%
Fee Waiver or Reimbursement [4],[5] (0.18%) (0.18%) (0.18%) (0.18%)
Net Expenses (as a percentage of Assets) 0.45% 0.52% 0.37% 0.62%
Fee Waiver or Reimbursement over Assets, Date of Termination September 30, 2027 September 30, 2027 September 30, 2027 September 30, 2027
[1]

Portions of the Management fees and Other expenses are based on expenses originally incurred by Class W shares of the Underlying Funds (as defined below) of the Trust, which have been incurred directly by the Fund pursuant to certain contractual arrangements intended to reallocate directly to the Fund certain fees and expenses that had been paid by the Underlying Funds of the Trust. For additional information, please see the “Management of the Funds” section of this Prospectus.

[2]

Restated to reflect estimate for the current fiscal year.

[3]

“Acquired fund fees and expenses” are the Fund’s proportionate amount of the expenses of any investment companies or pools in which it invests (excluding expenses originally incurred by Class W shares of the Underlying Funds of the Trust that have been incurred directly by the Fund, which are instead reflected in Management fees and Other expenses). These expenses are not paid directly by Fund shareholders. Instead, Fund shareholders bear these expenses indirectly because they reduce Fund performance. Because “Acquired fund fees and expenses” are included in the chart above, the Fund’s operating expenses here will not correlate with the expenses included in the Financial highlights in this Prospectus and the Fund’s Form N-CSR.

[4]

Nuveen Fund Advisors has contractually agreed to waive 0.100% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2029, unless changed with the approval of the Board of Trustees. Nuveen Fund Advisors has also contractually agreed to waive an additional 0.065% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2027, unless changed with the approval of the Board of Trustees.

[5]

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, extraordinary expenses and any expenses originally attributable to Class W shares of the Underlying Funds of the Trust that were incurred directly by the Fund) that exceed: (i) 0.150% of average daily net assets for Class I shares; (ii) 0.150% of average daily net assets for Premier Class shares; (iii) 0.000% of average daily net assets for Class R6 shares; and (iv) 0.250% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least September 30, 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 Lifecycle 2015 Fund - USD ($)
Class I
Premier Class
Class R6
Retirement Class
Expense Example, with Redemption, 1 Year $ 46 $ 53 $ 38 $ 63
Expense Example, with Redemption, 3 Years 162 184 136 216
Expense Example, with Redemption, 5 Years 312 350 268 405
Expense Example, with Redemption, 10 Years $ 749 $ 833 $ 651 $ 953
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 May 31, 2026, the Fund’s portfolio turnover rate was 28% of the average value of its portfolio.

Portfolio Turnover, Rate 28.00%
Nuveen Lifecycle 2015 Fund | Class I  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2015 Fund | Premier Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2015 Fund | Class R6  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2015 Fund | Retirement Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2020 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 Lifecycle 2020 Fund
Class I
Premier Class
Class R6
Retirement Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 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%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00% 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00% 0.00% 0.00%
Maximum Account Fee (as a percentage of Assets) 0.00% 0.00% 0.00% 0.00%
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 Lifecycle 2020 Fund
Class I
Premier Class
Class R6
Retirement Class
Management Fees (as a percentage of Assets) [1],[2] 0.39% 0.39% 0.39% 0.39%
Distribution and Service (12b-1) Fees 0.00% 0.15% 0.00% 0.00%
Other Expenses (as a percentage of Assets): [1],[2] 0.10% 0.02% 0.02% 0.27%
Acquired Fund Fees and Expenses [2],[3] 0.16% 0.16% 0.16% 0.16%
Expenses (as a percentage of Assets) 0.65% 0.72% 0.57% 0.82%
Fee Waiver or Reimbursement [4],[5] (0.18%) (0.18%) (0.18%) (0.18%)
Net Expenses (as a percentage of Assets) 0.47% 0.54% 0.39% 0.64%
Fee Waiver or Reimbursement over Assets, Date of Termination September 30, 2027 September 30, 2027 September 30, 2027 September 30, 2027
[1]

Portions of the Management fees and Other expenses are based on expenses originally incurred by Class W shares of the Underlying Funds (as defined below) of the Trust, which have been incurred directly by the Fund pursuant to certain contractual arrangements intended to reallocate directly to the Fund certain fees and expenses that had been paid by the Underlying Funds of the Trust. For additional information, please see the “Management of the Funds” section of this Prospectus.

[2]

Restated to reflect estimate for the current fiscal year.

[3]

“Acquired fund fees and expenses” are the Fund’s proportionate amount of the expenses of any investment companies or pools in which it invests (excluding expenses originally incurred by Class W shares of the Underlying Funds of the Trust that have been incurred directly by the Fund, which are instead reflected in Management fees and Other expenses). These expenses are not paid directly by Fund shareholders. Instead, Fund shareholders bear these expenses indirectly because they reduce Fund performance. Because “Acquired fund fees and expenses” are included in the chart above, the Fund’s operating expenses here will not correlate with the expenses included in the Financial highlights in this Prospectus and the Fund’s Form N-CSR.

[4]

Nuveen Fund Advisors has contractually agreed to waive 0.100% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2029, unless changed with the approval of the Board of Trustees. Nuveen Fund Advisors has also contractually agreed to waive an additional 0.066% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2027, unless changed with the approval of the Board of Trustees.

[5]

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, extraordinary expenses and any expenses originally attributable to Class W shares of the Underlying Funds of the Trust that were incurred directly by the Fund) that exceed: (i) 0.150% of average daily net assets for Class I shares; (ii) 0.150% of average daily net assets for Premier Class shares; (iii) 0.000% of average daily net assets for Class R6 shares; and (iv) 0.250% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least September 30, 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 Lifecycle 2020 Fund - USD ($)
Class I
Premier Class
Class R6
Retirement Class
Expense Example, with Redemption, 1 Year $ 48 $ 55 $ 40 $ 65
Expense Example, with Redemption, 3 Years 168 190 143 222
Expense Example, with Redemption, 5 Years 323 361 279 416
Expense Example, with Redemption, 10 Years $ 773 $ 857 $ 676 $ 977
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 May 31, 2026, the Fund’s portfolio turnover rate was 28% of the average value of its portfolio.

Portfolio Turnover, Rate 28.00%
Nuveen Lifecycle 2020 Fund | Class I  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2020 Fund | Premier Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2020 Fund | Class R6  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2020 Fund | Retirement Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2025 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 Lifecycle 2025 Fund
Class I
Premier Class
Class R6
Retirement Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 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%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00% 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00% 0.00% 0.00%
Maximum Account Fee (as a percentage of Assets) 0.00% 0.00% 0.00% 0.00%
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 Lifecycle 2025 Fund
Class I
Premier Class
Class R6
Retirement Class
Management Fees (as a percentage of Assets) [1],[2] 0.39% 0.39% 0.39% 0.39%
Distribution and Service (12b-1) Fees 0.00% 0.15% 0.00% 0.00%
Other Expenses (as a percentage of Assets): [1],[2] 0.10% 0.02% 0.02% 0.27%
Acquired Fund Fees and Expenses [2],[3] 0.16% 0.16% 0.16% 0.16%
Expenses (as a percentage of Assets) 0.65% 0.72% 0.57% 0.82%
Fee Waiver or Reimbursement [4],[5] (0.18%) (0.18%) (0.18%) (0.18%)
Net Expenses (as a percentage of Assets) 0.47% 0.54% 0.39% 0.64%
Fee Waiver or Reimbursement over Assets, Date of Termination September 30, 2027 September 30, 2027 September 30, 2027 September 30, 2027
[1]

Portions of the Management fees and Other expenses are based on expenses originally incurred by Class W shares of the Underlying Funds (as defined below) of the Trust, which have been incurred directly by the Fund pursuant to certain contractual arrangements intended to reallocate directly to the Fund certain fees and expenses that had been paid by the Underlying Funds of the Trust. For additional information, please see the “Management of the Funds” section of this Prospectus.

[2]

Restated to reflect estimate for the current fiscal year.

[3]

“Acquired fund fees and expenses” are the Fund’s proportionate amount of the expenses of any investment companies or pools in which it invests (excluding expenses originally incurred by Class W shares of the Underlying Funds of the Trust that have been incurred directly by the Fund, which are instead reflected in Management fees and Other expenses). These expenses are not paid directly by Fund shareholders. Instead, Fund shareholders bear these expenses indirectly because they reduce Fund performance. Because “Acquired fund fees and expenses” are included in the chart above, the Fund’s operating expenses here will not correlate with the expenses included in the Financial highlights in this Prospectus and the Fund’s Form N-CSR.

[4]

Nuveen Fund Advisors has contractually agreed to waive 0.100% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2029, unless changed with the approval of the Board of Trustees. Nuveen Fund Advisors has also contractually agreed to waive an additional 0.069% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2027, unless changed with the approval of the Board of Trustees.

[5]

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, extraordinary expenses and any expenses originally attributable to Class W shares of the Underlying Funds of the Trust that were incurred directly by the Fund) that exceed: (i) 0.150% of average daily net assets for Class I shares; (ii) 0.150% of average daily net assets for Premier Class shares; (iii) 0.000% of average daily net assets for Class R6 shares; and (iv) 0.250% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least September 30, 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 Lifecycle 2025 Fund - USD ($)
Class I
Premier Class
Class R6
Retirement Class
Expense Example, with Redemption, 1 Year $ 48 $ 55 $ 40 $ 65
Expense Example, with Redemption, 3 Years 168 190 143 222
Expense Example, with Redemption, 5 Years 323 361 279 416
Expense Example, with Redemption, 10 Years $ 773 $ 857 $ 676 $ 977
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 May 31, 2026, the Fund’s portfolio turnover rate was 29% of the average value of its portfolio.

Portfolio Turnover, Rate 29.00%
Nuveen Lifecycle 2025 Fund | Class I  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2025 Fund | Premier Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2025 Fund | Class R6  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2025 Fund | Retirement Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2030 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 Lifecycle 2030 Fund
Class I
Premier Class
Class R6
Retirement Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 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%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00% 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00% 0.00% 0.00%
Maximum Account Fee (as a percentage of Assets) 0.00% 0.00% 0.00% 0.00%
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 Lifecycle 2030 Fund
Class I
Premier Class
Class R6
Retirement Class
Management Fees (as a percentage of Assets) [1],[2] 0.39% 0.39% 0.39% 0.39%
Distribution and Service (12b-1) Fees 0.00% 0.15% 0.00% 0.00%
Other Expenses (as a percentage of Assets): [1],[2] 0.10% 0.02% 0.02% 0.27%
Acquired Fund Fees and Expenses [2],[3] 0.18% 0.18% 0.18% 0.18%
Expenses (as a percentage of Assets) 0.67% 0.74% 0.59% 0.84%
Fee Waiver or Reimbursement [4],[5] (0.19%) (0.19%) (0.19%) (0.19%)
Net Expenses (as a percentage of Assets) 0.48% 0.55% 0.40% 0.65%
Fee Waiver or Reimbursement over Assets, Date of Termination September 30, 2027 September 30, 2027 September 30, 2027 September 30, 2027
[1]

Portions of the Management fees and Other expenses are based on expenses originally incurred by Class W shares of the Underlying Funds (as defined below) of the Trust, which have been incurred directly by the Fund pursuant to certain contractual arrangements intended to reallocate directly to the Fund certain fees and expenses that had been paid by the Underlying Funds of the Trust. For additional information, please see the “Management of the Funds” section of this Prospectus.

[2]

Restated to reflect estimate for the current fiscal year.

[3]

“Acquired fund fees and expenses” are the Fund’s proportionate amount of the expenses of any investment companies or pools in which it invests (excluding expenses originally incurred by Class W shares of the Underlying Funds of the Trust that have been incurred directly by the Fund, which are instead reflected in Management fees and Other expenses). These expenses are not paid directly by Fund shareholders. Instead, Fund shareholders bear these expenses indirectly because they reduce Fund performance. Because “Acquired fund fees and expenses” are included in the chart above, the Fund’s operating expenses here will not correlate with the expenses included in the Financial highlights in this Prospectus and the Fund’s Form N-CSR.

[4]

Nuveen Fund Advisors has contractually agreed to waive 0.100% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2029, unless changed with the approval of the Board of Trustees. Nuveen Fund Advisors has also contractually agreed to waive an additional 0.081% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2027, unless changed with the approval of the Board of Trustees.

[5]

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, extraordinary expenses and any expenses originally attributable to Class W shares of the Underlying Funds of the Trust that were incurred directly by the Fund) that exceed: (i) 0.150% of average daily net assets for Class I shares; (ii) 0.150% of average daily net assets for Premier Class shares; (iii) 0.000% of average daily net assets for Class R6 shares; and (iv) 0.250% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least September 30, 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 Lifecycle 2030 Fund - USD ($)
Class I
Premier Class
Class R6
Retirement Class
Expense Example, with Redemption, 1 Year $ 49 $ 56 $ 41 $ 66
Expense Example, with Redemption, 3 Years 174 196 148 227
Expense Example, with Redemption, 5 Years 333 371 289 426
Expense Example, with Redemption, 10 Years $ 796 $ 880 $ 699 $ 999
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 May 31, 2026, the Fund’s portfolio turnover rate was 28% of the average value of its portfolio.

Portfolio Turnover, Rate 28.00%
Nuveen Lifecycle 2030 Fund | Class I  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2030 Fund | Premier Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2030 Fund | Class R6  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2030 Fund | Retirement Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2035 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 Lifecycle 2035 Fund
Class I
Premier Class
Class R6
Retirement Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 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%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00% 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00% 0.00% 0.00%
Maximum Account Fee (as a percentage of Assets) 0.00% 0.00% 0.00% 0.00%
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 Lifecycle 2035 Fund
Class I
Premier Class
Class R6
Retirement Class
Management Fees (as a percentage of Assets) [1],[2] 0.40% 0.40% 0.40% 0.40%
Distribution and Service (12b-1) Fees 0.00% 0.15% 0.00% 0.00%
Other Expenses (as a percentage of Assets): [1],[2] 0.09% 0.01% 0.01% 0.26%
Acquired Fund Fees and Expenses [2],[3] 0.19% 0.19% 0.19% 0.19%
Expenses (as a percentage of Assets) 0.68% 0.75% 0.60% 0.85%
Fee Waiver or Reimbursement [4],[5] (0.19%) (0.19%) (0.19%) (0.19%)
Net Expenses (as a percentage of Assets) 0.49% 0.56% 0.41% 0.66%
Fee Waiver or Reimbursement over Assets, Date of Termination September 30, 2027 September 30, 2027 September 30, 2027 September 30, 2027
[1]

Portions of the Management fees and Other expenses are based on expenses originally incurred by Class W shares of the Underlying Funds (as defined below) of the Trust, which have been incurred directly by the Fund pursuant to certain contractual arrangements intended to reallocate directly to the Fund certain fees and expenses that had been paid by the Underlying Funds of the Trust. For additional information, please see the “Management of the Funds” section of this Prospectus.

[2]

Restated to reflect estimate for the current fiscal year.

[3]

“Acquired fund fees and expenses” are the Fund’s proportionate amount of the expenses of any investment companies or pools in which it invests (excluding expenses originally incurred by Class W shares of the Underlying Funds of the Trust that have been incurred directly by the Fund, which are instead reflected in Management fees and Other expenses). These expenses are not paid directly by Fund shareholders. Instead, Fund shareholders bear these expenses indirectly because they reduce Fund performance. Because “Acquired fund fees and expenses” are included in the chart above, the Fund’s operating expenses here will not correlate with the expenses included in the Financial highlights in this Prospectus and the Fund’s Form N-CSR.

[4]

Nuveen Fund Advisors has contractually agreed to waive 0.100% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2029, unless changed with the approval of the Board of Trustees. Nuveen Fund Advisors has also contractually agreed to waive an additional 0.084% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2027, unless changed with the approval of the Board of Trustees.

[5]

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, extraordinary expenses and any expenses originally attributable to Class W shares of the Underlying Funds of the Trust that were incurred directly by the Fund) that exceed: (i) 0.150% of average daily net assets for Class I shares; (ii) 0.150% of average daily net assets for Premier Class shares; (iii) 0.000% of average daily net assets for Class R6 shares; and (iv) 0.250% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least September 30, 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 Lifecycle 2035 Fund - USD ($)
Class I
Premier Class
Class R6
Retirement Class
Expense Example, with Redemption, 1 Year $ 50 $ 57 $ 42 $ 67
Expense Example, with Redemption, 3 Years 177 199 151 231
Expense Example, with Redemption, 5 Years 338 377 294 432
Expense Example, with Redemption, 10 Years $ 808 $ 892 $ 711 $ 1,011
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 May 31, 2026, the Fund’s portfolio turnover rate was 27% of the average value of its portfolio.

Portfolio Turnover, Rate 27.00%
Nuveen Lifecycle 2035 Fund | Class I  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2035 Fund | Premier Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2035 Fund | Class R6  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2035 Fund | Retirement Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2040 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 Lifecycle 2040 Fund
Class I
Premier Class
Class R6
Retirement Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 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%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00% 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00% 0.00% 0.00%
Maximum Account Fee (as a percentage of Assets) 0.00% 0.00% 0.00% 0.00%
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 Lifecycle 2040 Fund
Class I
Premier Class
Class R6
Retirement Class
Management Fees (as a percentage of Assets) [1],[2] 0.40% 0.40% 0.40% 0.40%
Distribution and Service (12b-1) Fees 0.00% 0.15% 0.00% 0.00%
Other Expenses (as a percentage of Assets): [1],[2] 0.09% 0.01% 0.01% 0.26%
Acquired Fund Fees and Expenses [2],[3] 0.22% 0.22% 0.22% 0.22%
Expenses (as a percentage of Assets) 0.71% 0.78% 0.63% 0.88%
Fee Waiver or Reimbursement [4],[5] (0.21%) (0.21%) (0.21%) (0.21%)
Net Expenses (as a percentage of Assets) 0.50% 0.57% 0.42% 0.67%
Fee Waiver or Reimbursement over Assets, Date of Termination September 30, 2027 September 30, 2027 September 30, 2027 September 30, 2027
[1]

Portions of the Management fees and Other expenses are based on expenses originally incurred by Class W shares of the Underlying Funds (as defined below) of the Trust, which have been incurred directly by the Fund pursuant to certain contractual arrangements intended to reallocate directly to the Fund certain fees and expenses that had been paid by the Underlying Funds of the Trust. For additional information, please see the “Management of the Funds” section of this Prospectus.

[2]

Restated to reflect estimate for the current fiscal year.

[3]

“Acquired fund fees and expenses” are the Fund’s proportionate amount of the expenses of any investment companies or pools in which it invests (excluding expenses originally incurred by Class W shares of the Underlying Funds of the Trust that have been incurred directly by the Fund, which are instead reflected in Management fees and Other expenses). These expenses are not paid directly by Fund shareholders. Instead, Fund shareholders bear these expenses indirectly because they reduce Fund performance. Because “Acquired fund fees and expenses” are included in the chart above, the Fund’s operating expenses here will not correlate with the expenses included in the Financial highlights in this Prospectus and the Fund’s Form N-CSR.

[4]

Nuveen Fund Advisors has contractually agreed to waive 0.100% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2029, unless changed with the approval of the Board of Trustees. Nuveen Fund Advisors has also contractually agreed to waive an additional 0.106% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2027, unless changed with the approval of the Board of Trustees.

[5]

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, extraordinary expenses and any expenses originally attributable to Class W shares of the Underlying Funds of the Trust that were incurred directly by the Fund) that exceed: (i) 0.150% of average daily net assets for Class I shares; (ii) 0.150% of average daily net assets for Premier Class shares; (iii) 0.000% of average daily net assets for Class R6 shares; and (iv) 0.250% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least September 30, 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 Lifecycle 2040 Fund - USD ($)
Class I
Premier Class
Class R6
Retirement Class
Expense Example, with Redemption, 1 Year $ 51 $ 58 $ 43 $ 68
Expense Example, with Redemption, 3 Years 184 206 159 238
Expense Example, with Redemption, 5 Years 353 391 309 446
Expense Example, with Redemption, 10 Years $ 842 $ 926 $ 746 $ 1,045
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 May 31, 2026, the Fund’s portfolio turnover rate was 25% of the average value of its portfolio.

Portfolio Turnover, Rate 25.00%
Nuveen Lifecycle 2040 Fund | Class I  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2040 Fund | Premier Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2040 Fund | Class R6  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2040 Fund | Retirement Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2045 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 Lifecycle 2045 Fund
Class I
Premier Class
Class R6
Retirement Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 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%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00% 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00% 0.00% 0.00%
Maximum Account Fee (as a percentage of Assets) 0.00% 0.00% 0.00% 0.00%
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 Lifecycle 2045 Fund
Class I
Premier Class
Class R6
Retirement Class
Management Fees (as a percentage of Assets) [1],[2] 0.40% 0.40% 0.40% 0.40%
Distribution and Service (12b-1) Fees 0.00% 0.15% 0.00% 0.00%
Other Expenses (as a percentage of Assets): [1],[2] 0.09% 0.01% 0.01% 0.26%
Acquired Fund Fees and Expenses [2],[3] 0.24% 0.24% 0.24% 0.24%
Expenses (as a percentage of Assets) 0.73% 0.80% 0.65% 0.90%
Fee Waiver or Reimbursement [4],[5] (0.22%) (0.22%) (0.22%) (0.22%)
Net Expenses (as a percentage of Assets) 0.51% 0.58% 0.43% 0.68%
Fee Waiver or Reimbursement over Assets, Date of Termination September 30, 2027 September 30, 2027 September 30, 2027 September 30, 2027
[1]

Portions of the Management fees and Other expenses are based on expenses originally incurred by Class W shares of the Underlying Funds (as defined below) of the Trust, which have been incurred directly by the Fund pursuant to certain contractual arrangements intended to reallocate directly to the Fund certain fees and expenses that had been paid by the Underlying Funds of the Trust. For additional information, please see the “Management of the Funds” section of this Prospectus.

[2]

Restated to reflect estimate for the current fiscal year.

[3]

“Acquired fund fees and expenses” are the Fund’s proportionate amount of the expenses of any investment companies or pools in which it invests (excluding expenses originally incurred by Class W shares of the Underlying Funds of the Trust that have been incurred directly by the Fund, which are instead reflected in Management fees and Other expenses). These expenses are not paid directly by Fund shareholders. Instead, Fund shareholders bear these expenses indirectly because they reduce Fund performance. Because “Acquired fund fees and expenses” are included in the chart above, the Fund’s operating expenses here will not correlate with the expenses included in the Financial highlights in this Prospectus and the Fund’s Form N-CSR.

[4]

Nuveen Fund Advisors has contractually agreed to waive 0.100% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2029, unless changed with the approval of the Board of Trustees. Nuveen Fund Advisors has also contractually agreed to waive an additional 0.117% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2027, unless changed with the approval of the Board of Trustees.

[5]

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, extraordinary expenses and any expenses originally attributable to Class W shares of the Underlying Funds of the Trust that were incurred directly by the Fund) that exceed: (i) 0.150% of average daily net assets for Class I shares; (ii) 0.150% of average daily net assets for Premier Class shares; (iii) 0.000% of average daily net assets for Class R6 shares; and (iv) 0.250% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least September 30, 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 Lifecycle 2045 Fund - USD ($)
Class I
Premier Class
Class R6
Retirement Class
Expense Example, with Redemption, 1 Year $ 52 $ 59 $ 44 $ 69
Expense Example, with Redemption, 3 Years 190 212 164 243
Expense Example, with Redemption, 5 Years 363 401 319 456
Expense Example, with Redemption, 10 Years $ 865 $ 949 $ 769 $ 1,068
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 May 31, 2026, the Fund’s portfolio turnover rate was 26% of the average value of its portfolio.

Portfolio Turnover, Rate 26.00%
Nuveen Lifecycle 2045 Fund | Class I  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2045 Fund | Premier Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2045 Fund | Class R6  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2045 Fund | Retirement Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2050 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 Lifecycle 2050 Fund
Class I
Premier Class
Class R6
Retirement Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 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%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00% 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00% 0.00% 0.00%
Maximum Account Fee (as a percentage of Assets) 0.00% 0.00% 0.00% 0.00%
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 Lifecycle 2050 Fund
Class I
Premier Class
Class R6
Retirement Class
Management Fees (as a percentage of Assets) [1],[2] 0.40% 0.40% 0.40% 0.40%
Distribution and Service (12b-1) Fees 0.00% 0.15% 0.00% 0.00%
Other Expenses (as a percentage of Assets): [1],[2] 0.09% 0.01% 0.01% 0.26%
Acquired Fund Fees and Expenses [2],[3] 0.25% 0.25% 0.25% 0.25%
Expenses (as a percentage of Assets) 0.74% 0.81% 0.66% 0.91%
Fee Waiver or Reimbursement [4],[5] (0.22%) (0.22%) (0.22%) (0.22%)
Net Expenses (as a percentage of Assets) 0.52% 0.59% 0.44% 0.69%
Fee Waiver or Reimbursement over Assets, Date of Termination September 30, 2027 September 30, 2027 September 30, 2027 September 30, 2027
[1]

Portions of the Management fees and Other expenses are based on expenses originally incurred by Class W shares of the Underlying Funds (as defined below) of the Trust, which have been incurred directly by the Fund pursuant to certain contractual arrangements intended to reallocate directly to the Fund certain fees and expenses that had been paid by the Underlying Funds of the Trust. For additional information, please see the “Management of the Funds” section of this Prospectus.

[2]

Restated to reflect estimate for the current fiscal year.

[3]

“Acquired fund fees and expenses” are the Fund’s proportionate amount of the expenses of any investment companies or pools in which it invests (excluding expenses originally incurred by Class W shares of the Underlying Funds of the Trust that have been incurred directly by the Fund, which are instead reflected in Management fees and Other expenses). These expenses are not paid directly by Fund shareholders. Instead, Fund shareholders bear these expenses indirectly because they reduce Fund performance. Because “Acquired fund fees and expenses” are included in the chart above, the Fund’s operating expenses here will not correlate with the expenses included in the Financial highlights in this Prospectus and the Fund’s Form N-CSR.

[4]

Nuveen Fund Advisors has contractually agreed to waive 0.100% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2029, unless changed with the approval of the Board of Trustees. Nuveen Fund Advisors has also contractually agreed to waive an additional 0.116% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2027, unless changed with the approval of the Board of Trustees.

[5]

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, extraordinary expenses and any expenses originally attributable to Class W shares of the Underlying Funds of the Trust that were incurred directly by the Fund) that exceed: (i) 0.150% of average daily net assets for Class I shares; (ii) 0.150% of average daily net assets for Premier Class shares; (iii) 0.000% of average daily net assets for Class R6 shares; and (iv) 0.250% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least September 30, 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 Lifecycle 2050 Fund - USD ($)
Class I
Premier Class
Class R6
Retirement Class
Expense Example, with Redemption, 1 Year $ 53 $ 60 $ 45 $ 70
Expense Example, with Redemption, 3 Years 193 215 167 247
Expense Example, with Redemption, 5 Years 368 407 325 461
Expense Example, with Redemption, 10 Years $ 877 $ 961 $ 781 $ 1,079
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 May 31, 2026, the Fund’s portfolio turnover rate was 24% of the average value of its portfolio.

Portfolio Turnover, Rate 24.00%
Nuveen Lifecycle 2050 Fund | Class I  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2050 Fund | Premier Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2050 Fund | Class R6  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2050 Fund | Retirement Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2055 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 Lifecycle 2055 Fund
Class I
Premier Class
Class R6
Retirement Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 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%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00% 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00% 0.00% 0.00%
Maximum Account Fee (as a percentage of Assets) 0.00% 0.00% 0.00% 0.00%
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 Lifecycle 2055 Fund
Class I
Premier Class
Class R6
Retirement Class
Management Fees (as a percentage of Assets) [1],[2] 0.40% 0.40% 0.40% 0.40%
Distribution and Service (12b-1) Fees 0.00% 0.15% 0.00% 0.00%
Other Expenses (as a percentage of Assets): [1],[2] 0.10% 0.02% 0.02% 0.27%
Acquired Fund Fees and Expenses [2],[3] 0.25% 0.25% 0.25% 0.25%
Expenses (as a percentage of Assets) 0.75% 0.82% 0.67% 0.92%
Fee Waiver or Reimbursement [4],[5] (0.22%) (0.22%) (0.22%) (0.22%)
Net Expenses (as a percentage of Assets) 0.53% 0.60% 0.45% 0.70%
Fee Waiver or Reimbursement over Assets, Date of Termination September 30, 2027 September 30, 2027 September 30, 2027 September 30, 2027
[1]

Portions of the Management fees and Other expenses are based on expenses originally incurred by Class W shares of the Underlying Funds (as defined below) of the Trust, which have been incurred directly by the Fund pursuant to certain contractual arrangements intended to reallocate directly to the Fund certain fees and expenses that had been paid by the Underlying Funds of the Trust. For additional information, please see the “Management of the Funds” section of this Prospectus.

[2]

Restated to reflect estimate for the current fiscal year.

[3]

“Acquired fund fees and expenses” are the Fund’s proportionate amount of the expenses of any investment companies or pools in which it invests (excluding expenses originally incurred by Class W shares of the Underlying Funds of the Trust that have been incurred directly by the Fund, which are instead reflected in Management fees and Other expenses). These expenses are not paid directly by Fund shareholders. Instead, Fund shareholders bear these expenses indirectly because they reduce Fund performance. Because “Acquired fund fees and expenses” are included in the chart above, the Fund’s operating expenses here will not correlate with the expenses included in the Financial highlights in this Prospectus and the Fund’s Form N-CSR.

[4]

Nuveen Fund Advisors has contractually agreed to waive 0.100% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2029, unless changed with the approval of the Board of Trustees. Nuveen Fund Advisors has also contractually agreed to waive an additional 0.106% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2027, unless changed with the approval of the Board of Trustees.

[5]

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, extraordinary expenses and any expenses originally attributable to Class W shares of the Underlying Funds of the Trust that were incurred directly by the Fund) that exceed: (i) 0.150% of average daily net assets for Class I shares; (ii) 0.150% of average daily net assets for Premier Class shares; (iii) 0.000% of average daily net assets for Class R6 shares; and (iv) 0.250% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least September 30, 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 Lifecycle 2055 Fund - USD ($)
Class I
Premier Class
Class R6
Retirement Class
Expense Example, with Redemption, 1 Year $ 54 $ 61 $ 46 $ 72
Expense Example, with Redemption, 3 Years 196 218 171 250
Expense Example, with Redemption, 5 Years 374 412 330 467
Expense Example, with Redemption, 10 Years $ 889 $ 973 $ 793 $ 1,091
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 May 31, 2026, the Fund’s portfolio turnover rate was 23% of the average value of its portfolio.

Portfolio Turnover, Rate 23.00%
Nuveen Lifecycle 2055 Fund | Class I  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2055 Fund | Premier Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2055 Fund | Class R6  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2055 Fund | Retirement Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2060 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 Lifecycle 2060 Fund
Class I
Premier Class
Class R6
Retirement Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 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%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00% 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00% 0.00% 0.00%
Maximum Account Fee (as a percentage of Assets) 0.00% 0.00% 0.00% 0.00%
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 Lifecycle 2060 Fund
Class I
Premier Class
Class R6
Retirement Class
Management Fees (as a percentage of Assets) [1],[2] 0.40% 0.40% 0.40% 0.40%
Distribution and Service (12b-1) Fees 0.00% 0.15% 0.00% 0.00%
Other Expenses (as a percentage of Assets): [1],[2] 0.11% 0.03% 0.03% 0.28%
Acquired Fund Fees and Expenses [2],[3] 0.26% 0.26% 0.26% 0.26%
Expenses (as a percentage of Assets) 0.77% 0.84% 0.69% 0.94%
Fee Waiver or Reimbursement [4],[5] (0.24%) (0.24%) (0.24%) (0.24%)
Net Expenses (as a percentage of Assets) 0.53% 0.60% 0.45% 0.70%
Fee Waiver or Reimbursement over Assets, Date of Termination September 30, 2027 September 30, 2027 September 30, 2027 September 30, 2027
[1]

Portions of the Management fees and Other expenses are based on expenses originally incurred by Class W shares of the Underlying Funds (as defined below) of the Trust, which have been incurred directly by the Fund pursuant to certain contractual arrangements intended to reallocate directly to the Fund certain fees and expenses that had been paid by the Underlying Funds of the Trust. For additional information, please see the “Management of the Funds” section of this Prospectus.

[2]

Restated to reflect estimate for the current fiscal year.

[3]

“Acquired fund fees and expenses” are the Fund’s proportionate amount of the expenses of any investment companies or pools in which it invests (excluding expenses originally incurred by Class W shares of the Underlying Funds of the Trust that have been incurred directly by the Fund, which are instead reflected in Management fees and Other expenses). These expenses are not paid directly by Fund shareholders. Instead, Fund shareholders bear these expenses indirectly because they reduce Fund performance. Because “Acquired fund fees and expenses” are included in the chart above, the Fund’s operating expenses here will not correlate with the expenses included in the Financial highlights in this Prospectus and the Fund’s Form N-CSR.

[4]

Nuveen Fund Advisors has contractually agreed to waive 0.100% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2029, unless changed with the approval of the Board of Trustees. Nuveen Fund Advisors has also contractually agreed to waive an additional 0.116% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2027, unless changed with the approval of the Board of Trustees.

[5]

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, extraordinary expenses and any expenses originally attributable to Class W shares of the Underlying Funds of the Trust that were incurred directly by the Fund) that exceed: (i) 0.150% of average daily net assets for Class I shares; (ii) 0.150% of average daily net assets for Premier Class shares; (iii) 0.000% of average daily net assets for Class R6 shares; and (iv) 0.250% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least September 30, 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 Lifecycle 2060 Fund - USD ($)
Class I
Premier Class
Class R6
Retirement Class
Expense Example, with Redemption, 1 Year $ 54 $ 61 $ 46 $ 72
Expense Example, with Redemption, 3 Years 200 222 175 254
Expense Example, with Redemption, 5 Years 383 421 339 476
Expense Example, with Redemption, 10 Years $ 911 $ 995 $ 815 $ 1,113
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 May 31, 2026, the Fund’s portfolio turnover rate was 22% of the average value of its portfolio.

Portfolio Turnover, Rate 22.00%
Nuveen Lifecycle 2060 Fund | Class I  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2060 Fund | Premier Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2060 Fund | Class R6  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2060 Fund | Retirement Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2065 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 Lifecycle 2065 Fund
Class I
Premier Class
Class R6
Retirement Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 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%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00% 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00% 0.00% 0.00%
Maximum Account Fee (as a percentage of Assets) 0.00% 0.00% 0.00% 0.00%
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 Lifecycle 2065 Fund
Class I
Premier Class
Class R6
Retirement Class
Management Fees (as a percentage of Assets) [1],[2] 0.40% 0.40% 0.40% 0.40%
Distribution and Service (12b-1) Fees 0.00% 0.15% 0.00% 0.00%
Other Expenses (as a percentage of Assets): [1],[2] 0.18% 0.10% 0.10% 0.35%
Acquired Fund Fees and Expenses [2],[3] 0.26% 0.26% 0.26% 0.26%
Expenses (as a percentage of Assets) 0.84% 0.91% 0.76% 1.01%
Fee Waiver or Reimbursement [4],[5] (0.31%) (0.31%) (0.31%) (0.31%)
Net Expenses (as a percentage of Assets) 0.53% 0.60% 0.45% 0.70%
Fee Waiver or Reimbursement over Assets, Date of Termination September 30, 2027 September 30, 2027 September 30, 2027 September 30, 2027
[1]

Portions of the Management fees and Other expenses are based on expenses originally incurred by Class W shares of the Underlying Funds (as defined below) of the Trust, which have been incurred directly by the Fund pursuant to certain contractual arrangements intended to reallocate directly to the Fund certain fees and expenses that had been paid by the Underlying Funds of the Trust. For additional information, please see the “Management of the Funds” section of this Prospectus.

[2]

Restated to reflect estimate for the current fiscal year.

[3]

“Acquired fund fees and expenses” are the Fund’s proportionate amount of the expenses of any investment companies or pools in which it invests (excluding expenses originally incurred by Class W shares of the Underlying Funds of the Trust that have been incurred directly by the Fund, which are instead reflected in Management fees and Other expenses). These expenses are not paid directly by Fund shareholders. Instead, Fund shareholders bear these expenses indirectly because they reduce Fund performance. Because “Acquired fund fees and expenses” are included in the chart above, the Fund’s operating expenses here will not correlate with the expenses included in the Financial highlights in this Prospectus and the Fund’s Form N-CSR.

[4]

Nuveen Fund Advisors has contractually agreed to waive 0.100% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2029, unless changed with the approval of the Board of Trustees. Nuveen Fund Advisors has also contractually agreed to waive an additional 0.116% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2027, unless changed with the approval of the Board of Trustees.

[5]

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, extraordinary expenses and any expenses originally attributable to Class W shares of the Underlying Funds of the Trust that were incurred directly by the Fund) that exceed: (i) 0.150% of average daily net assets for Class I shares; (ii) 0.150% of average daily net assets for Premier Class shares; (iii) 0.000% of average daily net assets for Class R6 shares; and (iv) 0.250% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least September 30, 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 Lifecycle 2065 Fund - USD ($)
Class I
Premier Class
Class R6
Retirement Class
Expense Example, with Redemption, 1 Year $ 54 $ 61 $ 46 $ 72
Expense Example, with Redemption, 3 Years 215 238 190 269
Expense Example, with Redemption, 5 Years 414 452 371 507
Expense Example, with Redemption, 10 Years $ 988 $ 1,071 $ 893 $ 1,188
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 May 31, 2026, the Fund’s portfolio turnover rate was 29% of the average value of its portfolio.

Portfolio Turnover, Rate 29.00%
Nuveen Lifecycle 2065 Fund | Class I  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2065 Fund | Premier Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2065 Fund | Class R6  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2065 Fund | Retirement Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2070 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 Lifecycle 2070 Fund
Class I
Class R6
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00% 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) 0.00% 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00%
Maximum Account Fee (as a percentage of Assets) 0.00% 0.00%
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 Lifecycle 2070 Fund
Class I
Class R6
Premier
Retirement
Management Fees (as a percentage of Assets) [1],[2] 0.40% 0.40% 0.40% 0.40%
Distribution and Service (12b-1) Fees 0.00% 0.00% 0.15% 0.00%
Other Expenses (as a percentage of Assets): [1],[2] 4.44% 4.07% 4.44% 4.69%
Acquired Fund Fees and Expenses [2],[3] 0.26% 0.26% 0.26% 0.26%
Expenses (as a percentage of Assets) 5.10% 4.73% 5.25% 5.35%
Fee Waiver or Reimbursement [4],[5] (4.50%) (4.28%) (4.65%) (4.65%)
Net Expenses (as a percentage of Assets) 0.60% 0.45% 0.60% 0.70%
Fee Waiver or Reimbursement over Assets, Date of Termination September 30, 2027 September 30, 2027 September 30, 2027 September 30, 2027
[1]

Portions of the Management fees and Other expenses are based on expenses originally incurred by Class W shares of the Underlying Funds (as defined below) of the Trust, which have been incurred directly by the Fund pursuant to certain contractual arrangements intended to reallocate directly to the Fund certain fees and expenses that had been paid by the Underlying Funds of the Trust. For additional information, please see the “Management of the Funds” section of this Prospectus.

[2]

Restated to reflect estimate for the current fiscal year.

[3]

“Acquired fund fees and expenses” are the Fund’s proportionate amount of the expenses of any investment companies or pools in which it invests (excluding expenses originally incurred by Class W shares of the Underlying Funds of the Trust that have been incurred directly by the Fund, which are instead reflected in Management fees and Other expenses). These expenses are not paid directly by Fund shareholders. Instead, Fund shareholders bear these expenses indirectly because they reduce Fund performance. Because “Acquired fund fees and expenses” are included in the chart above, the Fund’s operating expenses here will not correlate with the expenses included in the Financial highlights in this Prospectus and the Fund’s Form N-CSR.

[4]

Nuveen Fund Advisors has contractually agreed to waive 0.100% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2029, unless changed with the approval of the Board of Trustees. Nuveen Fund Advisors has also contractually agreed to waive an additional 0.119% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2027, unless changed with the approval of the Board of Trustees.

[5]

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, extraordinary expenses and any expenses originally attributable to Class W shares of the Underlying Funds of the Trust that were incurred directly by the Fund) that exceed: (i) 0.150% of average daily net assets for Class I shares; (ii) 0.150% of average daily net assets for Premier Class shares; (iii) 0.000% of average daily net assets for Class R6 shares; and (iv) 0.250% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least September 30, 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 Lifecycle 2070 Fund - USD ($)
Class I
Class R6
Premier
Retirement
Expense Example, with Redemption, 1 Year $ 61 $ 46 $ 61 $ 72
Expense Example, with Redemption, 3 Years 1,105 1,018 1,135 1,164
Expense Example, with Redemption, 5 Years 2,169 2,017 2,225 2,270
Expense Example, with Redemption, 10 Years $ 4,819 $ 4,538 $ 4,927 $ 5,003
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 May 31, 2026, the Fund’s portfolio turnover rate was 9% of the average value of its portfolio.

Portfolio Turnover, Rate 9.00%
Nuveen Lifecycle 2070 Fund | Class I  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2070 Fund | Class R6  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2070 Fund | Premier  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle 2070 Fund | Retirement  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index Retirement Income 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 Lifecycle Index Retirement Income Fund
Class I
Premier Class
Class R6
Retirement Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 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%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00% 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00% 0.00% 0.00%
Maximum Account Fee (as a percentage of Assets) 0.00% 0.00% 0.00% 0.00%
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 Lifecycle Index Retirement Income Fund
Class I
Premier Class
Class R6
Retirement Class
Management Fees (as a percentage of Assets) [1],[2] 0.16% 0.16% 0.16% 0.16%
Distribution and Service (12b-1) Fees 0.00% 0.15% 0.00% 0.00%
Other Expenses (as a percentage of Assets): [1],[2] 0.11% 0.03% 0.03% 0.28%
Acquired Fund Fees and Expenses [3] 0.01% 0.01% 0.01% 0.01%
Expenses (as a percentage of Assets) 0.28% 0.35% 0.20% 0.45%
Fee Waiver or Reimbursement [4],[5] (0.10%) (0.10%) (0.10%) (0.10%)
Net Expenses (as a percentage of Assets) 0.18% 0.25% 0.10% 0.35%
Fee Waiver or Reimbursement over Assets, Date of Termination September 30, 2027 September 30, 2027 September 30, 2027 September 30, 2027
[1]

Portions of the Management fees and Other expenses are based on expenses originally incurred by Class W shares of the Underlying Funds (as defined below) of the Trust, which have been incurred directly by the Fund pursuant to certain contractual arrangements intended to reallocate directly to the Fund certain fees and expenses that had been paid by the Underlying Funds of the Trust. For additional information, please see the “Management of the Funds” section of this Prospectus.

[2]

Restated to reflect estimate for the current fiscal year.

[3]

“Acquired fund fees and expenses” are the Fund’s proportionate amount of the expenses of any investment companies or pools in which it invests (excluding expenses originally incurred by Class W shares of the Underlying Funds of the Trust that have been incurred directly by the Fund, which are instead reflected in Management fees and Other expenses). These expenses are not paid directly by Fund shareholders. Instead, Fund shareholders bear these expenses indirectly because they reduce Fund performance. Because “Acquired fund fees and expenses” are included in the chart above, the Fund’s operating expenses here will not correlate with the expenses included in the Financial highlights in this Prospectus and the Fund’s Form N-CSR.

[4]

Nuveen Fund Advisors has contractually agreed to waive 0.078% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2027, unless changed with the approval of the Board of Trustees.

[5]

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, extraordinary expenses and any expenses originally attributable to Class W shares of the Underlying Funds of the Trust that were incurred directly by the Fund) that exceed: (i) 0.172% of average daily net assets for Class I shares; (ii) 0.172% of average daily net assets for Premier Class shares; (iii) 0.022% of average daily net assets for Class R6 shares; and (iv) 0.272% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least September 30, 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 Lifecycle Index Retirement Income Fund - USD ($)
Class I
Premier Class
Class R6
Retirement Class
Expense Example, with Redemption, 1 Year $ 18 $ 26 $ 10 $ 36
Expense Example, with Redemption, 3 Years 80 102 54 134
Expense Example, with Redemption, 5 Years 147 186 103 242
Expense Example, with Redemption, 10 Years $ 346 $ 433 $ 245 $ 557
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 May 31, 2026, the Fund’s portfolio turnover rate was 36% of the average value of its portfolio.

Portfolio Turnover, Rate 36.00%
Nuveen Lifecycle Index Retirement Income Fund | Class I  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index Retirement Income Fund | Premier Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index Retirement Income Fund | Class R6  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index Retirement Income Fund | Retirement Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2010 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 Lifecycle Index 2010 Fund
Class I
Premier Class
Class R6
Retirement Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 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%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00% 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00% 0.00% 0.00%
Maximum Account Fee (as a percentage of Assets) 0.00% 0.00% 0.00% 0.00%
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 Lifecycle Index 2010 Fund
Class I
Premier Class
Class R6
Retirement Class
Management Fees (as a percentage of Assets) [1],[2] 0.16% 0.16% 0.16% 0.16%
Distribution and Service (12b-1) Fees 0.00% 0.15% 0.00% 0.00%
Other Expenses (as a percentage of Assets): [1],[2] 0.11% 0.03% 0.03% 0.28%
Acquired Fund Fees and Expenses [3] 0.01% 0.01% 0.01% 0.01%
Expenses (as a percentage of Assets) 0.28% 0.35% 0.20% 0.45%
Fee Waiver or Reimbursement [4],[5] (0.10%) (0.10%) (0.10%) (0.10%)
Net Expenses (as a percentage of Assets) 0.18% 0.25% 0.10% 0.35%
Fee Waiver or Reimbursement over Assets, Date of Termination September 30, 2027 September 30, 2027 September 30, 2027 September 30, 2027
[1]

Portions of the Management fees and Other expenses are based on expenses originally incurred by Class W shares of the Underlying Funds (as defined below) of the Trust, which have been incurred directly by the Fund pursuant to certain contractual arrangements intended to reallocate directly to the Fund certain fees and expenses that had been paid by the Underlying Funds of the Trust. For additional information, please see the “Management of the Funds” section of this Prospectus.

[2]

Restated to reflect estimate for the current fiscal year.

[3]

“Acquired fund fees and expenses” are the Fund’s proportionate amount of the expenses of any investment companies or pools in which it invests (excluding expenses originally incurred by Class W shares of the Underlying Funds of the Trust that have been incurred directly by the Fund, which are instead reflected in Management fees and Other expenses). These expenses are not paid directly by Fund shareholders. Instead, Fund shareholders bear these expenses indirectly because they reduce Fund performance. Because “Acquired fund fees and expenses” are included in the chart above, the Fund’s operating expenses here will not correlate with the expenses included in the Financial highlights in this Prospectus and the Fund’s Form N-CSR.

[4]

Nuveen Fund Advisors has contractually agreed to waive 0.079% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2027, unless changed with the approval of the Board of Trustees.

[5]

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, extraordinary expenses and any expenses originally attributable to Class W shares of the Underlying Funds of the Trust that were incurred directly by the Fund) that exceed: (i) 0.171% of average daily net assets for Class I shares; (ii) 0.171% of average daily net assets for Premier Class shares; (iii) 0.021% of average daily net assets for Class R6 shares; and (iv) 0.271% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least September 30, 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 Lifecycle Index 2010 Fund - USD ($)
Class I
Premier Class
Class R6
Retirement Class
Expense Example, with Redemption, 1 Year $ 18 $ 26 $ 10 $ 36
Expense Example, with Redemption, 3 Years 80 102 54 134
Expense Example, with Redemption, 5 Years 147 186 103 242
Expense Example, with Redemption, 10 Years $ 346 $ 433 $ 245 $ 557
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 May 31, 2026, the Fund’s portfolio turnover rate was 32% of the average value of its portfolio.

Portfolio Turnover, Rate 32.00%
Nuveen Lifecycle Index 2010 Fund | Class I  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2010 Fund | Premier Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2010 Fund | Class R6  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2010 Fund | Retirement Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2015 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 Lifecycle Index 2015 Fund
Class I
Premier Class
Class R6
Retirement Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 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%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00% 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00% 0.00% 0.00%
Maximum Account Fee (as a percentage of Assets) 0.00% 0.00% 0.00% 0.00%
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 Lifecycle Index 2015 Fund
Class I
Premier Class
Class R6
Retirement Class
Management Fees (as a percentage of Assets) [1],[2] 0.16% 0.16% 0.16% 0.16%
Distribution and Service (12b-1) Fees 0.00% 0.15% 0.00% 0.00%
Other Expenses (as a percentage of Assets): [1],[2] 0.11% 0.03% 0.03% 0.28%
Acquired Fund Fees and Expenses [3] 0.01% 0.01% 0.01% 0.01%
Expenses (as a percentage of Assets) 0.28% 0.35% 0.20% 0.45%
Fee Waiver or Reimbursement [4],[5] (0.10%) (0.10%) (0.10%) (0.10%)
Net Expenses (as a percentage of Assets) 0.18% 0.25% 0.10% 0.35%
Fee Waiver or Reimbursement over Assets, Date of Termination September 30, 2027 September 30, 2027 September 30, 2027 September 30, 2027
[1]

Portions of the Management fees and Other expenses are based on expenses originally incurred by Class W shares of the Underlying Funds (as defined below) of the Trust, which have been incurred directly by the Fund pursuant to certain contractual arrangements intended to reallocate directly to the Fund certain fees and expenses that had been paid by the Underlying Funds of the Trust. For additional information, please see the “Management of the Funds” section of this Prospectus.

[2]

Restated to reflect estimate for the current fiscal year.

[3]

“Acquired fund fees and expenses” are the Fund’s proportionate amount of the expenses of any investment companies or pools in which it invests (excluding expenses originally incurred by Class W shares of the Underlying Funds of the Trust that have been incurred directly by the Fund, which are instead reflected in Management fees and Other expenses). These expenses are not paid directly by Fund shareholders. Instead, Fund shareholders bear these expenses indirectly because they reduce Fund performance. Because “Acquired fund fees and expenses” are included in the chart above, the Fund’s operating expenses here will not correlate with the expenses included in the Financial highlights in this Prospectus and the Fund’s Form N-CSR.

[4]

Nuveen Fund Advisors has contractually agreed to waive 0.078% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2027, unless changed with the approval of the Board of Trustees.

[5]

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, extraordinary expenses and any expenses originally attributable to Class W shares of the Underlying Funds of the Trust that were incurred directly by the Fund) that exceed: (i) 0.172% of average daily net assets for Class I shares; (ii) 0.172% of average daily net assets for Premier Class shares; (iii) 0.022% of average daily net assets for Class R6 shares; and (iv) 0.272% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least September 30, 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 Lifecycle Index 2015 Fund - USD ($)
Class I
Premier Class
Class R6
Retirement Class
Expense Example, with Redemption, 1 Year $ 18 $ 26 $ 10 $ 36
Expense Example, with Redemption, 3 Years 80 102 54 134
Expense Example, with Redemption, 5 Years 147 186 103 242
Expense Example, with Redemption, 10 Years $ 346 $ 433 $ 245 $ 557
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 May 31, 2026, the Fund’s portfolio turnover rate was 25% of the average value of its portfolio.

Portfolio Turnover, Rate 25.00%
Nuveen Lifecycle Index 2015 Fund | Class I  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2015 Fund | Premier Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2015 Fund | Class R6  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2015 Fund | Retirement Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2020 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 Lifecycle Index 2020 Fund
Class I
Premier Class
Class R6
Retirement Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 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%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00% 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00% 0.00% 0.00%
Maximum Account Fee (as a percentage of Assets) 0.00% 0.00% 0.00% 0.00%
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 Lifecycle Index 2020 Fund
Class I
Premier Class
Class R6
Retirement Class
Management Fees (as a percentage of Assets) [1],[2] 0.16% 0.16% 0.16% 0.16%
Distribution and Service (12b-1) Fees 0.00% 0.15% 0.00% 0.00%
Other Expenses (as a percentage of Assets): [1],[2] 0.09% 0.01% 0.01% 0.26%
Acquired Fund Fees and Expenses [3] 0.01% 0.01% 0.01% 0.01%
Expenses (as a percentage of Assets) 0.26% 0.33% 0.18% 0.43%
Fee Waiver or Reimbursement [4],[5] (0.08%) (0.08%) (0.08%) (0.08%)
Net Expenses (as a percentage of Assets) 0.18% 0.25% 0.10% 0.35%
Fee Waiver or Reimbursement over Assets, Date of Termination September 30, 2027 September 30, 2027 September 30, 2027 September 30, 2027
[1]

Portions of the Management fees and Other expenses are based on expenses originally incurred by Class W shares of the Underlying Funds (as defined below) of the Trust, which have been incurred directly by the Fund pursuant to certain contractual arrangements intended to reallocate directly to the Fund certain fees and expenses that had been paid by the Underlying Funds of the Trust. For additional information, please see the “Management of the Funds” section of this Prospectus.

[2]

Restated to reflect estimate for the current fiscal year.

[3]

“Acquired fund fees and expenses” are the Fund’s proportionate amount of the expenses of any investment companies or pools in which it invests (excluding expenses originally incurred by Class W shares of the Underlying Funds of the Trust that have been incurred directly by the Fund, which are instead reflected in Management fees and Other expenses). These expenses are not paid directly by Fund shareholders. Instead, Fund shareholders bear these expenses indirectly because they reduce Fund performance. Because “Acquired fund fees and expenses” are included in the chart above, the Fund’s operating expenses here will not correlate with the expenses included in the Financial highlights in this Prospectus and the Fund’s Form N-CSR.

[4]

Nuveen Fund Advisors has contractually agreed to waive 0.075% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2027, unless changed with the approval of the Board of Trustees.

[5]

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, extraordinary expenses and any expenses originally attributable to Class W shares of the Underlying Funds of the Trust that were incurred directly by the Fund) that exceed: (i) 0.175% of average daily net assets for Class I shares; (ii) 0.175% of average daily net assets for Premier Class shares; (iii) 0.025% of average daily net assets for Class R6 shares; and (iv) 0.275% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least September 30, 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 Lifecycle Index 2020 Fund - USD ($)
Class I
Premier Class
Class R6
Retirement Class
Expense Example, with Redemption, 1 Year $ 18 $ 26 $ 10 $ 36
Expense Example, with Redemption, 3 Years 76 98 50 130
Expense Example, with Redemption, 5 Years 138 177 93 233
Expense Example, with Redemption, 10 Years $ 323 $ 410 $ 222 $ 534
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 May 31, 2026, the Fund’s portfolio turnover rate was 23% of the average value of its portfolio.

Portfolio Turnover, Rate 23.00%
Nuveen Lifecycle Index 2020 Fund | Class I  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2020 Fund | Premier Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2020 Fund | Class R6  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2020 Fund | Retirement Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2025 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 Lifecycle Index 2025 Fund
Class I
Premier Class
Class R6
Retirement Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 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%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00% 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00% 0.00% 0.00%
Maximum Account Fee (as a percentage of Assets) 0.00% 0.00% 0.00% 0.00%
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 Lifecycle Index 2025 Fund
Class I
Premier Class
Class R6
Retirement Class
Management Fees (as a percentage of Assets) [1],[2] 0.16% 0.16% 0.16% 0.16%
Distribution and Service (12b-1) Fees 0.00% 0.15% 0.00% 0.00%
Other Expenses (as a percentage of Assets): [1],[2] 0.09% 0.01% 0.01% 0.26%
Acquired Fund Fees and Expenses [3] 0.01% 0.01% 0.01% 0.01%
Expenses (as a percentage of Assets) 0.26% 0.33% 0.18% 0.43%
Fee Waiver or Reimbursement [4],[5] (0.08%) (0.08%) (0.08%) (0.08%)
Net Expenses (as a percentage of Assets) 0.18% 0.25% 0.10% 0.35%
Fee Waiver or Reimbursement over Assets, Date of Termination September 30, 2027 September 30, 2027 September 30, 2027 September 30, 2027
[1]

Portions of the Management fees and Other expenses are based on expenses originally incurred by Class W shares of the Underlying Funds (as defined below) of the Trust, which have been incurred directly by the Fund pursuant to certain contractual arrangements intended to reallocate directly to the Fund certain fees and expenses that had been paid by the Underlying Funds of the Trust. For additional information, please see the “Management of the Funds” section of this Prospectus.

[2]

Restated to reflect estimate for the current fiscal year.

[3]

“Acquired fund fees and expenses” are the Fund’s proportionate amount of the expenses of any investment companies or pools in which it invests (excluding expenses originally incurred by Class W shares of the Underlying Funds of the Trust that have been incurred directly by the Fund, which are instead reflected in Management fees and Other expenses). These expenses are not paid directly by Fund shareholders. Instead, Fund shareholders bear these expenses indirectly because they reduce Fund performance. Because “Acquired fund fees and expenses” are included in the chart above, the Fund’s operating expenses here will not correlate with the expenses included in the Financial highlights in this Prospectus and the Fund’s Form N-CSR.

[4]

Nuveen Fund Advisors has contractually agreed to waive 0.070% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2027, unless changed with the approval of the Board of Trustees.

[5]

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, extraordinary expenses and any expenses originally attributable to Class W shares of the Underlying Funds of the Trust that were incurred directly by the Fund) that exceed: (i) 0.180% of average daily net assets for Class I shares; (ii) 0.180% of average daily net assets for Premier Class shares; (iii) 0.030% of average daily net assets for Class R6 shares; and (iv) 0.280% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least September 30, 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 Lifecycle Index 2025 Fund - USD ($)
Class I
Premier Class
Class R6
Retirement Class
Expense Example, with Redemption, 1 Year $ 18 $ 26 $ 10 $ 36
Expense Example, with Redemption, 3 Years 76 98 50 130
Expense Example, with Redemption, 5 Years 138 177 93 233
Expense Example, with Redemption, 10 Years $ 323 $ 410 $ 222 $ 534
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 May 31, 2026, the Fund’s portfolio turnover rate was 22% of the average value of its portfolio.

Portfolio Turnover, Rate 22.00%
Nuveen Lifecycle Index 2025 Fund | Class I  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2025 Fund | Premier Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2025 Fund | Class R6  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2025 Fund | Retirement Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2030 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 Lifecycle Index 2030 Fund
Class I
Premier Class
Class R6
Retirement Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 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%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00% 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00% 0.00% 0.00%
Maximum Account Fee (as a percentage of Assets) 0.00% 0.00% 0.00% 0.00%
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 Lifecycle Index 2030 Fund
Class I
Premier Class
Class R6
Retirement Class
Management Fees (as a percentage of Assets) [1],[2] 0.16% 0.16% 0.16% 0.16%
Distribution and Service (12b-1) Fees 0.00% 0.15% 0.00% 0.00%
Other Expenses (as a percentage of Assets): [1],[2] 0.09% 0.01% 0.01% 0.26%
Acquired Fund Fees and Expenses [3] 0.01% 0.01% 0.01% 0.01%
Expenses (as a percentage of Assets) 0.26% 0.33% 0.18% 0.43%
Fee Waiver or Reimbursement [4],[5] (0.08%) (0.08%) (0.08%) (0.08%)
Net Expenses (as a percentage of Assets) 0.18% 0.25% 0.10% 0.35%
Fee Waiver or Reimbursement over Assets, Date of Termination September 30, 2027 September 30, 2027 September 30, 2027 September 30, 2027
[1]

Portions of the Management fees and Other expenses are based on expenses originally incurred by Class W shares of the Underlying Funds (as defined below) of the Trust, which have been incurred directly by the Fund pursuant to certain contractual arrangements intended to reallocate directly to the Fund certain fees and expenses that had been paid by the Underlying Funds of the Trust. For additional information, please see the “Management of the Funds” section of this Prospectus.

[2]

Restated to reflect estimate for the current fiscal year.

[3]

“Acquired fund fees and expenses” are the Fund’s proportionate amount of the expenses of any investment companies or pools in which it invests (excluding expenses originally incurred by Class W shares of the Underlying Funds of the Trust that have been incurred directly by the Fund, which are instead reflected in Management fees and Other expenses). These expenses are not paid directly by Fund shareholders. Instead, Fund shareholders bear these expenses indirectly because they reduce Fund performance. Because “Acquired fund fees and expenses” are included in the chart above, the Fund’s operating expenses here will not correlate with the expenses included in the Financial highlights in this Prospectus and the Fund’s Form N-CSR.

[4]

Nuveen Fund Advisors has contractually agreed to waive 0.066% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2027, unless changed with the approval of the Board of Trustees.

[5]

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, extraordinary expenses and any expenses originally attributable to Class W shares of the Underlying Funds of the Trust that were incurred directly by the Fund) that exceed: (i) 0.184% of average daily net assets for Class I shares; (ii) 0.184% of average daily net assets for Premier Class shares; (iii) 0.034% of average daily net assets for Class R6 shares; and (iv) 0.284% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least September 30, 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 Lifecycle Index 2030 Fund - USD ($)
Class I
Premier Class
Class R6
Retirement Class
Expense Example, with Redemption, 1 Year $ 18 $ 26 $ 10 $ 36
Expense Example, with Redemption, 3 Years 76 98 50 130
Expense Example, with Redemption, 5 Years 138 177 93 233
Expense Example, with Redemption, 10 Years $ 323 $ 410 $ 222 $ 534
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 May 31, 2026, the Fund’s portfolio turnover rate was 23% of the average value of its portfolio.

Portfolio Turnover, Rate 23.00%
Nuveen Lifecycle Index 2030 Fund | Class I  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2030 Fund | Premier Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2030 Fund | Class R6  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2030 Fund | Retirement Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2035 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 Lifecycle Index 2035 Fund
Class I
Premier Class
Class R6
Retirement Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 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%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00% 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00% 0.00% 0.00%
Maximum Account Fee (as a percentage of Assets) 0.00% 0.00% 0.00% 0.00%
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 Lifecycle Index 2035 Fund
Class I
Premier Class
Class R6
Retirement Class
Management Fees (as a percentage of Assets) [1],[2] 0.15% 0.15% 0.15% 0.15%
Distribution and Service (12b-1) Fees 0.00% 0.15% 0.00% 0.00%
Other Expenses (as a percentage of Assets): [1],[2] 0.09% 0.01% 0.01% 0.26%
Acquired Fund Fees and Expenses [3] 0.01% 0.01% 0.01% 0.01%
Expenses (as a percentage of Assets) 0.25% 0.32% 0.17% 0.42%
Fee Waiver or Reimbursement [4],[5] (0.07%) (0.07%) (0.07%) (0.07%)
Net Expenses (as a percentage of Assets) 0.18% 0.25% 0.10% 0.35%
Fee Waiver or Reimbursement over Assets, Date of Termination September 30, 2027 September 30, 2027 September 30, 2027 September 30, 2027
[1]

Portions of the Management fees and Other expenses are based on expenses originally incurred by Class W shares of the Underlying Funds (as defined below) of the Trust, which have been incurred directly by the Fund pursuant to certain contractual arrangements intended to reallocate directly to the Fund certain fees and expenses that had been paid by the Underlying Funds of the Trust. For additional information, please see the “Management of the Funds” section of this Prospectus.

[2]

Restated to reflect estimate for the current fiscal year.

[3]

“Acquired fund fees and expenses” are the Fund’s proportionate amount of the expenses of any investment companies or pools in which it invests (excluding expenses originally incurred by Class W shares of the Underlying Funds of the Trust that have been incurred directly by the Fund, which are instead reflected in Management fees and Other expenses). These expenses are not paid directly by Fund shareholders. Instead, Fund shareholders bear these expenses indirectly because they reduce Fund performance. Because “Acquired fund fees and expenses” are included in the chart above, the Fund’s operating expenses here will not correlate with the expenses included in the Financial highlights in this Prospectus and the Fund’s Form N-CSR.

[4]

Nuveen Fund Advisors has contractually agreed to waive 0.061% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2027, unless changed with the approval of the Board of Trustees.

[5]

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, extraordinary expenses and any expenses originally attributable to Class W shares of the Underlying Funds of the Trust that were incurred directly by the Fund) that exceed: (i) 0.189% of average daily net assets for Class I shares; (ii) 0.189% of average daily net assets for Premier Class shares; (iii) 0.039% of average daily net assets for Class R6 shares; and (iv) 0.289% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least September 30, 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 Lifecycle Index 2035 Fund - USD ($)
Class I
Premier Class
Class R6
Retirement Class
Expense Example, with Redemption, 1 Year $ 18 $ 26 $ 10 $ 36
Expense Example, with Redemption, 3 Years 73 96 48 128
Expense Example, with Redemption, 5 Years 134 173 89 228
Expense Example, with Redemption, 10 Years $ 311 $ 399 $ 210 $ 523
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 May 31, 2026, the Fund’s portfolio turnover rate was 22% of the average value of its portfolio.

Portfolio Turnover, Rate 22.00%
Nuveen Lifecycle Index 2035 Fund | Class I  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2035 Fund | Premier Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2035 Fund | Class R6  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2035 Fund | Retirement Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2040 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 Lifecycle Index 2040 Fund
Class I
Premier Class
Class R6
Retirement Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 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%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00% 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00% 0.00% 0.00%
Maximum Account Fee (as a percentage of Assets) 0.00% 0.00% 0.00% 0.00%
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 Lifecycle Index 2040 Fund
Class I
Premier Class
Class R6
Retirement Class
Management Fees (as a percentage of Assets) [1],[2] 0.15% 0.15% 0.15% 0.15%
Distribution and Service (12b-1) Fees 0.00% 0.15% 0.00% 0.00%
Other Expenses (as a percentage of Assets): [1],[2] 0.09% 0.01% 0.01% 0.26%
Expenses (as a percentage of Assets) 0.24% 0.31% 0.16% 0.41%
Fee Waiver or Reimbursement [3],[4] (0.06%) (0.06%) (0.06%) (0.06%)
Net Expenses (as a percentage of Assets) 0.18% 0.25% 0.10% 0.35%
Fee Waiver or Reimbursement over Assets, Date of Termination September 30, 2027 September 30, 2027 September 30, 2027 September 30, 2027
[1]

Portions of the Management fees and Other expenses are based on expenses originally incurred by Class W shares of the Underlying Funds (as defined below) of the Trust, which have been incurred directly by the Fund pursuant to certain contractual arrangements intended to reallocate directly to the Fund certain fees and expenses that had been paid by the Underlying Funds of the Trust. For additional information, please see the “Management of the Funds” section of this Prospectus.

[2]

Restated to reflect estimate for the current fiscal year.

[3]

Nuveen Fund Advisors has contractually agreed to waive 0.056% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2027, unless changed with the approval of the Board of Trustees.

[4]

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, extraordinary expenses and any expenses originally attributable to Class W shares of the Underlying Funds of the Trust that were incurred directly by the Fund) that exceed: (i) 0.194% of average daily net assets for Class I shares; (ii) 0.194% of average daily net assets for Premier Class shares; (iii) 0.044% of average daily net assets for Class R6 shares; and (iv) 0.294% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least September 30, 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 Lifecycle Index 2040 Fund - USD ($)
Class I
Premier Class
Class R6
Retirement Class
Expense Example, with Redemption, 1 Year $ 18 $ 26 $ 10 $ 36
Expense Example, with Redemption, 3 Years 71 94 45 126
Expense Example, with Redemption, 5 Years 129 168 84 224
Expense Example, with Redemption, 10 Years $ 300 $ 387 $ 199 $ 512
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 May 31, 2026, the Fund’s portfolio turnover rate was 20% of the average value of its portfolio.

Portfolio Turnover, Rate 20.00%
Nuveen Lifecycle Index 2040 Fund | Class I  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2040 Fund | Premier Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2040 Fund | Class R6  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2040 Fund | Retirement Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2045 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 Lifecycle Index 2045 Fund
Class I
Premier Class
Class R6
Retirement Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 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%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00% 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00% 0.00% 0.00%
Maximum Account Fee (as a percentage of Assets) 0.00% 0.00% 0.00% 0.00%
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 Lifecycle Index 2045 Fund
Class I
Premier Class
Class R6
Retirement Class
Management Fees (as a percentage of Assets) [1],[2] 0.15% 0.15% 0.15% 0.15%
Distribution and Service (12b-1) Fees 0.00% 0.15% 0.00% 0.00%
Other Expenses (as a percentage of Assets): [1],[2] 0.09% 0.01% 0.01% 0.26%
Expenses (as a percentage of Assets) 0.24% 0.31% 0.16% 0.41%
Fee Waiver or Reimbursement [3],[4] (0.06%) (0.06%) (0.06%) (0.06%)
Net Expenses (as a percentage of Assets) 0.18% 0.25% 0.10% 0.35%
Fee Waiver or Reimbursement over Assets, Date of Termination September 30, 2027 September 30, 2027 September 30, 2027 September 30, 2027
[1]

Portions of the Management fees and Other expenses are based on expenses originally incurred by Class W shares of the Underlying Funds (as defined below) of the Trust, which have been incurred directly by the Fund pursuant to certain contractual arrangements intended to reallocate directly to the Fund certain fees and expenses that had been paid by the Underlying Funds of the Trust. For additional information, please see the “Management of the Funds” section of this Prospectus.

[2]

Restated to reflect estimate for the current fiscal year.

[3]

Nuveen Fund Advisors has contractually agreed to waive 0.054% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2027, unless changed with the approval of the Board of Trustees.

[4]

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, extraordinary expenses and any expenses originally attributable to Class W shares of the Underlying Funds of the Trust that were incurred directly by the Fund) that exceed: (i) 0.196% of average daily net assets for Class I shares; (ii) 0.196% of average daily net assets for Premier Class shares; (iii) 0.046% of average daily net assets for Class R6 shares; and (iv) 0.296% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least September 30, 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 Lifecycle Index 2045 Fund - USD ($)
Class I
Premier Class
Class R6
Retirement Class
Expense Example, with Redemption, 1 Year $ 18 $ 26 $ 10 $ 36
Expense Example, with Redemption, 3 Years 71 94 45 126
Expense Example, with Redemption, 5 Years 129 168 84 224
Expense Example, with Redemption, 10 Years $ 300 $ 387 $ 199 $ 512
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 May 31, 2026, the Fund’s portfolio turnover rate was 21% of the average value of its portfolio.

Portfolio Turnover, Rate 21.00%
Nuveen Lifecycle Index 2045 Fund | Class I  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2045 Fund | Premier Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2045 Fund | Class R6  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2045 Fund | Retirement Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2050 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 Lifecycle Index 2050 Fund
Class I
Premier Class
Class R6
Retirement Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 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%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00% 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00% 0.00% 0.00%
Maximum Account Fee (as a percentage of Assets) 0.00% 0.00% 0.00% 0.00%
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 Lifecycle Index 2050 Fund
Class I
Premier Class
Class R6
Retirement Class
Management Fees (as a percentage of Assets) [1],[2] 0.15% 0.15% 0.15% 0.15%
Distribution and Service (12b-1) Fees 0.00% 0.15% 0.00% 0.00%
Other Expenses (as a percentage of Assets): [1],[2] 0.09% 0.01% 0.01% 0.26%
Expenses (as a percentage of Assets) 0.24% 0.31% 0.16% 0.41%
Fee Waiver or Reimbursement [3],[4] (0.06%) (0.06%) (0.06%) (0.06%)
Net Expenses (as a percentage of Assets) 0.18% 0.25% 0.10% 0.35%
Fee Waiver or Reimbursement over Assets, Date of Termination September 30, 2027 September 30, 2027 September 30, 2027 September 30, 2027
[1]

Portions of the Management fees and Other expenses are based on expenses originally incurred by Class W shares of the Underlying Funds (as defined below) of the Trust, which have been incurred directly by the Fund pursuant to certain contractual arrangements intended to reallocate directly to the Fund certain fees and expenses that had been paid by the Underlying Funds of the Trust. For additional information, please see the “Management of the Funds” section of this Prospectus.

[2]

Restated to reflect estimate for the current fiscal year.

[3]

Nuveen Fund Advisors has contractually agreed to waive 0.053% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2027, unless changed with the approval of the Board of Trustees.

[4]

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, extraordinary expenses and any expenses originally attributable to Class W shares of the Underlying Funds of the Trust that were incurred directly by the Fund) that exceed: (i) 0.197% of average daily net assets for Class I shares; (ii) 0.197% of average daily net assets for Premier Class shares; (iii) 0.047% of average daily net assets for Class R6 shares; and (iv) 0.297% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least September 30, 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 Lifecycle Index 2050 Fund - USD ($)
Class I
Premier Class
Class R6
Retirement Class
Expense Example, with Redemption, 1 Year $ 18 $ 26 $ 10 $ 36
Expense Example, with Redemption, 3 Years 71 94 45 126
Expense Example, with Redemption, 5 Years 129 168 84 224
Expense Example, with Redemption, 10 Years $ 300 $ 387 $ 199 $ 512
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 May 31, 2026, the Fund’s portfolio turnover rate was 17% of the average value of its portfolio.

Portfolio Turnover, Rate 17.00%
Nuveen Lifecycle Index 2050 Fund | Class I  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2050 Fund | Premier Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2050 Fund | Class R6  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2050 Fund | Retirement Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2055 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 Lifecycle Index 2055 Fund
Class I
Premier Class
Class R6
Retirement Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 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%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00% 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00% 0.00% 0.00%
Maximum Account Fee (as a percentage of Assets) 0.00% 0.00% 0.00% 0.00%
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 Lifecycle Index 2055 Fund
Class I
Premier Class
Class R6
Retirement Class
Management Fees (as a percentage of Assets) [1],[2] 0.15% 0.15% 0.15% 0.15%
Distribution and Service (12b-1) Fees 0.00% 0.15% 0.00% 0.00%
Other Expenses (as a percentage of Assets): [1],[2] 0.09% 0.01% 0.01% 0.26%
Expenses (as a percentage of Assets) 0.24% 0.31% 0.16% 0.41%
Fee Waiver or Reimbursement [3],[4] (0.06%) (0.06%) (0.06%) (0.06%)
Net Expenses (as a percentage of Assets) 0.18% 0.25% 0.10% 0.35%
Fee Waiver or Reimbursement over Assets, Date of Termination September 30, 2027 September 30, 2027 September 30, 2027 September 30, 2027
[1]

Portions of the Management fees and Other expenses are based on expenses originally incurred by Class W shares of the Underlying Funds (as defined below) of the Trust, which have been incurred directly by the Fund pursuant to certain contractual arrangements intended to reallocate directly to the Fund certain fees and expenses that had been paid by the Underlying Funds of the Trust. For additional information, please see the “Management of the Funds” section of this Prospectus.

[2]

Restated to reflect estimate for the current fiscal year.

[3]

Nuveen Fund Advisors has contractually agreed to waive 0.053% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2027, unless changed with the approval of the Board of Trustees.

[4]

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, extraordinary expenses and any expenses originally attributable to Class W shares of the Underlying Funds of the Trust that were incurred directly by the Fund) that exceed: (i) 0.197% of average daily net assets for Class I shares; (ii) 0.197% of average daily net assets for Premier Class shares; (iii) 0.047% of average daily net assets for Class R6 shares; and (iv) 0.297% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least September 30, 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 Lifecycle Index 2055 Fund - USD ($)
Class I
Premier Class
Class R6
Retirement Class
Expense Example, with Redemption, 1 Year $ 18 $ 26 $ 10 $ 36
Expense Example, with Redemption, 3 Years 71 94 45 126
Expense Example, with Redemption, 5 Years 129 168 84 224
Expense Example, with Redemption, 10 Years $ 300 $ 387 $ 199 $ 512
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 May 31, 2026, the Fund’s portfolio turnover rate was 20% of the average value of its portfolio.

Portfolio Turnover, Rate 20.00%
Nuveen Lifecycle Index 2055 Fund | Class I  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2055 Fund | Premier Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2055 Fund | Class R6  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2055 Fund | Retirement Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2060 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 Lifecycle Index 2060 Fund
Class I
Premier Class
Class R6
Retirement Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 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%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00% 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00% 0.00% 0.00%
Maximum Account Fee (as a percentage of Assets) 0.00% 0.00% 0.00% 0.00%
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 Lifecycle Index 2060 Fund
Class I
Premier Class
Class R6
Retirement Class
Management Fees (as a percentage of Assets) [1],[2] 0.15% 0.15% 0.15% 0.15%
Distribution and Service (12b-1) Fees 0.00% 0.15% 0.00% 0.00%
Other Expenses (as a percentage of Assets): [1],[2] 0.10% 0.02% 0.02% 0.27%
Expenses (as a percentage of Assets) 0.25% 0.32% 0.17% 0.42%
Fee Waiver or Reimbursement [3],[4] (0.07%) (0.07%) (0.07%) (0.07%)
Net Expenses (as a percentage of Assets) 0.18% 0.25% 0.10% 0.35%
Fee Waiver or Reimbursement over Assets, Date of Termination September 30, 2027 September 30, 2027 September 30, 2027 September 30, 2027
[1]

Portions of the Management fees and Other expenses are based on expenses originally incurred by Class W shares of the Underlying Funds (as defined below) of the Trust, which have been incurred directly by the Fund pursuant to certain contractual arrangements intended to reallocate directly to the Fund certain fees and expenses that had been paid by the Underlying Funds of the Trust. For additional information, please see the “Management of the Funds” section of this Prospectus.

[2]

Restated to reflect estimate for the current fiscal year.

[3]

Nuveen Fund Advisors has contractually agreed to waive 0.053% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2027, unless changed with the approval of the Board of Trustees.

[4]

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, extraordinary expenses and any expenses originally attributable to Class W shares of the Underlying Funds of the Trust that were incurred directly by the Fund) that exceed: (i) 0.197% of average daily net assets for Class I shares; (ii) 0.197% of average daily net assets for Premier Class shares; (iii) 0.047% of average daily net assets for Class R6 shares; and (iv) 0.297% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least September 30, 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 Lifecycle Index 2060 Fund - USD ($)
Class I
Premier Class
Class R6
Retirement Class
Expense Example, with Redemption, 1 Year $ 18 $ 26 $ 10 $ 36
Expense Example, with Redemption, 3 Years 73 96 48 128
Expense Example, with Redemption, 5 Years 134 173 89 228
Expense Example, with Redemption, 10 Years $ 311 $ 399 $ 210 $ 523
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 May 31, 2026, the Fund’s portfolio turnover rate was 22% of the average value of its portfolio.

Portfolio Turnover, Rate 22.00%
Nuveen Lifecycle Index 2060 Fund | Class I  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2060 Fund | Premier Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2060 Fund | Class R6  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2060 Fund | Retirement Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2065 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 Lifecycle Index 2065 Fund
Class I
Premier Class
Class R6
Retirement Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 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%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00% 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00% 0.00% 0.00%
Maximum Account Fee (as a percentage of Assets) 0.00% 0.00% 0.00% 0.00%
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 Lifecycle Index 2065 Fund
Class I
Premier Class
Class R6
Retirement Class
Management Fees (as a percentage of Assets) [1],[2] 0.15% 0.15% 0.15% 0.15%
Distribution and Service (12b-1) Fees 0.00% 0.15% 0.00% 0.00%
Other Expenses (as a percentage of Assets): [1],[2] 0.11% 0.03% 0.03% 0.29%
Expenses (as a percentage of Assets) 0.26% 0.33% 0.18% 0.44%
Fee Waiver or Reimbursement [3],[4] (0.08%) (0.08%) (0.08%) (0.09%)
Net Expenses (as a percentage of Assets) 0.18% 0.25% 0.10% 0.35%
Fee Waiver or Reimbursement over Assets, Date of Termination September 30, 2027 September 30, 2027 September 30, 2027 September 30, 2027
[1]

Portions of the Management fees and Other expenses are based on expenses originally incurred by Class W shares of the Underlying Funds (as defined below) of the Trust, which have been incurred directly by the Fund pursuant to certain contractual arrangements intended to reallocate directly to the Fund certain fees and expenses that had been paid by the Underlying Funds of the Trust. For additional information, please see the “Management of the Funds” section of this Prospectus.

[2]

Restated to reflect estimate for the current fiscal year.

[3]

Nuveen Fund Advisors has contractually agreed to waive 0.053% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2027, unless changed with the approval of the Board of Trustees.

[4]

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, extraordinary expenses and any expenses originally attributable to Class W shares of the Underlying Funds of the Trust that were incurred directly by the Fund) that exceed: (i) 0.197% of average daily net assets for Class I shares; (ii) 0.197% of average daily net assets for Premier Class shares; (iii) 0.047% of average daily net assets for Class R6 shares; and (iv) 0.297% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least September 30, 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 Lifecycle Index 2065 Fund - USD ($)
Class I
Premier Class
Class R6
Retirement Class
Expense Example, with Redemption, 1 Year $ 18 $ 26 $ 10 $ 36
Expense Example, with Redemption, 3 Years 76 98 50 132
Expense Example, with Redemption, 5 Years 138 177 93 237
Expense Example, with Redemption, 10 Years $ 323 $ 410 $ 222 $ 546
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 May 31, 2026, the Fund’s portfolio turnover rate was 12% of the average value of its portfolio.

Portfolio Turnover, Rate 12.00%
Nuveen Lifecycle Index 2065 Fund | Class I  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2065 Fund | Premier Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2065 Fund | Class R6  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2065 Fund | Retirement Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2070 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 Lifecycle Index 2070 Fund
Class I
Class R6
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00% 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) 0.00% 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00% 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00% 0.00%
Maximum Account Fee (as a percentage of Assets) 0.00% 0.00%
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 Lifecycle Index 2070 Fund
Class I
Class R6
Premier
Retirement
Management Fees (as a percentage of Assets) [1] 0.15% 0.15% 0.15% 0.15%
Distribution and Service (12b-1) Fees 0.00% 0.00% 0.15% 0.00%
Other Expenses (as a percentage of Assets): [1] 4.04% 3.66% 4.04% 4.29%
Expenses (as a percentage of Assets) 4.19% 3.81% 4.34% 4.44%
Fee Waiver or Reimbursement [2],[3] (3.94%) (3.71%) (4.09%) (4.09%)
Net Expenses (as a percentage of Assets) 0.25% 0.10% 0.25% 0.35%
Fee Waiver or Reimbursement over Assets, Date of Termination September 30, 2027 September 30, 2027 September 30, 2027 September 30, 2027
[1]

Restated to reflect estimate for the current fiscal year.

[2]

Nuveen Fund Advisors has contractually agreed to waive 0.055% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2027, unless changed with the approval of the Board of Trustees.

[3]

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, extraordinary expenses and any expenses originally attributable to Class W shares of the Underlying Funds of the Trust that were incurred directly by the Fund) that exceed: (i) 0.195% of average daily net assets for Class I shares; (ii) 0.195% of average daily net assets for Premier Class shares; (iii) 0.045% of average daily net assets for Class R6 shares; and (iv) 0.295% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least September 30, 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 Lifecycle Index 2070 Fund - USD ($)
Class I
Class R6
Premier
Retirement
Expense Example, with Redemption, 1 Year $ 26 $ 10 $ 26 $ 36
Expense Example, with Redemption, 3 Years 911 819 941 970
Expense Example, with Redemption, 5 Years 1,810 1,647 1,868 1,915
Expense Example, with Redemption, 10 Years $ 4,123 $ 3,806 $ 4,241 $ 4,325
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 May 31, 2026, the Fund’s portfolio turnover rate was 23% of the average value of its portfolio.

Portfolio Turnover, Rate 23.00%
Nuveen Lifecycle Index 2070 Fund | Class I  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2070 Fund | Class R6  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2070 Fund | Premier  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifecycle Index 2070 Fund | Retirement  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifestyle Income 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 in 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 130 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 84 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 Lifestyle Income Fund - USD ($)
Class A
Class I
Premier Class
Class R6
Retirement Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 5.75% 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 Lifestyle Income Fund
Class A
Class I
Premier Class
Class R6
Retirement Class
Management Fees (as a percentage of Assets) 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%
Other Expenses (as a percentage of Assets): 0.22% 0.26% 0.44% 0.17% 0.42%
Acquired Fund Fees and Expenses [1],[2] 0.38% 0.38% 0.38% 0.38% 0.38%
Expenses (as a percentage of Assets) 0.95% 0.74% 1.07% 0.65% 0.90%
Fee Waiver or Reimbursement [3] (0.17%) (0.17%) (0.44%) (0.17%) (0.17%)
Net Expenses (as a percentage of Assets) 0.78% 0.57% 0.63% 0.48% 0.73%
Fee Waiver or Reimbursement over Assets, Date of Termination September 30, 2027 September 30, 2027 September 30, 2027 September 30, 2027 September 30, 2027
[1]

Restated to reflect estimate for the current fiscal year.

[2]

“Acquired fund fees and expenses” are the Fund’s proportionate amount of the expenses of any investment companies or pools in which it invests. These expenses are not paid directly by Fund shareholders. Instead, Fund shareholders bear these expenses indirectly because they reduce Fund performance. Because “Acquired fund fees and expenses” are included in the chart above, the Fund’s operating expenses here will not correlate with the expenses included in the Financial highlights in this Prospectus and the Fund’s Form N-CSR.

[3]

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) 0.450% of average daily net assets for Class A shares; (ii) 0.250% of average daily net assets for Class I shares; (iii) 0.250% of average daily net assets for Premier Class shares; (iv) 0.100% of average daily net assets for Class R6 shares; and (v) 0.350% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least September 30, 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 duration 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 Lifestyle Income Fund - USD ($)
Class A
Class I
Premier Class
Class R6
Retirement Class
Expense Example, with Redemption, 1 Year $ 650 $ 58 $ 64 $ 49 $ 75
Expense Example, with Redemption, 3 Years 844 219 297 191 270
Expense Example, with Redemption, 5 Years 1,055 395 547 345 482
Expense Example, with Redemption, 10 Years $ 1,660 $ 902 $ 1,266 $ 794 $ 1,092
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 May 31, 2026, the Fund’s portfolio turnover rate was 16% of the average value of its portfolio.

Portfolio Turnover, Rate 16.00%
Nuveen Lifestyle Income Fund | Class A  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifestyle Income Fund | Class I  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifestyle Income Fund | Premier Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifestyle Income Fund | Class R6  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifestyle Income Fund | Retirement Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifestyle Conservative 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 in 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 130 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 84 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 Lifestyle Conservative Fund - USD ($)
Class A
Class I
Premier Class
Class R6
Retirement Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 5.75% 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 Lifestyle Conservative Fund
Class A
Class I
Premier Class
Class R6
Retirement Class
Management Fees (as a percentage of Assets) 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%
Other Expenses (as a percentage of Assets): 0.10% 0.13% 0.19% 0.05% 0.30%
Acquired Fund Fees and Expenses [1],[2] 0.44% 0.44% 0.44% 0.44% 0.44%
Expenses (as a percentage of Assets) 0.89% 0.67% 0.88% 0.59% 0.84%
Fee Waiver or Reimbursement [3] (0.05%) (0.05%) (0.19%) (0.05%) (0.05%)
Net Expenses (as a percentage of Assets) 0.84% 0.62% 0.69% 0.54% 0.79%
Fee Waiver or Reimbursement over Assets, Date of Termination September 30, 2027 September 30, 2027 September 30, 2027 September 30, 2027 September 30, 2027
[1]

Restated to reflect estimate for the current fiscal year.

[2]

“Acquired fund fees and expenses” are the Fund’s proportionate amount of the expenses of any investment companies or pools in which it invests. These expenses are not paid directly by Fund shareholders. Instead, Fund shareholders bear these expenses indirectly because they reduce Fund performance. Because “Acquired fund fees and expenses” are included in the chart above, the Fund’s operating expenses here will not correlate with the expenses included in the Financial highlights in this Prospectus and the Fund’s Form N-CSR.

[3]

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) 0.450% of average daily net assets for Class A shares; (ii) 0.250% of average daily net assets for Class I shares; (iii) 0.250% of average daily net assets for Premier Class shares; (iv) 0.100% of average daily net assets for Class R6 shares; and (v) 0.350% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least September 30, 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 duration 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 Lifestyle Conservative Fund - USD ($)
Class A
Class I
Premier Class
Class R6
Retirement Class
Expense Example, with Redemption, 1 Year $ 656 $ 63 $ 70 $ 55 $ 81
Expense Example, with Redemption, 3 Years 838 209 262 184 263
Expense Example, with Redemption, 5 Years 1,035 368 469 324 461
Expense Example, with Redemption, 10 Years $ 1,604 $ 830 $ 1,067 $ 733 $ 1,033
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 May 31, 2026, the Fund’s portfolio turnover rate was 19% of the average value of its portfolio.

Portfolio Turnover, Rate 19.00%
Nuveen Lifestyle Conservative Fund | Class A  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifestyle Conservative Fund | Class I  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifestyle Conservative Fund | Premier Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifestyle Conservative Fund | Class R6  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifestyle Conservative Fund | Retirement Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifestyle Moderate 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 in 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 130 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 84 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 Lifestyle Moderate Fund - USD ($)
Class A
Class I
Premier Class
Class R6
Retirement Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 5.75% 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 Lifestyle Moderate Fund
Class A
Class I
Premier Class
Class R6
Retirement Class
Management Fees (as a percentage of Assets) 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%
Other Expenses (as a percentage of Assets): 0.08% 0.11% 0.21% 0.03% 0.28%
Acquired Fund Fees and Expenses [1],[2] 0.50% 0.50% 0.50% 0.50% 0.50%
Expenses (as a percentage of Assets) 0.93% 0.71% 0.96% 0.63% 0.88%
Fee Waiver or Reimbursement [3] (0.03%) (0.03%) (0.21%) (0.03%) (0.03%)
Net Expenses (as a percentage of Assets) 0.90% 0.68% 0.75% 0.60% 0.85%
Fee Waiver or Reimbursement over Assets, Date of Termination September 30, 2027 September 30, 2027 September 30, 2027 September 30, 2027 September 30, 2027
[1]

Restated to reflect estimate for the current fiscal year.

[2]

“Acquired fund fees and expenses” are the Fund’s proportionate amount of the expenses of any investment companies or pools in which it invests. These expenses are not paid directly by Fund shareholders. Instead, Fund shareholders bear these expenses indirectly because they reduce Fund performance. Because “Acquired fund fees and expenses” are included in the chart above, the Fund’s operating expenses here will not correlate with the expenses included in the Financial highlights in this Prospectus and the Fund’s Form N-CSR.

[3]

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) 0.450% of average daily net assets for Class A shares; (ii) 0.250% of average daily net assets for Class I shares; (iii) 0.250% of average daily net assets for Premier Class shares; (iv) 0.100% of average daily net assets for Class R6 shares; and (v) 0.350% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least September 30, 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 duration 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 Lifestyle Moderate Fund - USD ($)
Class A
Class I
Premier Class
Class R6
Retirement Class
Expense Example, with Redemption, 1 Year $ 662 $ 69 $ 77 $ 61 $ 87
Expense Example, with Redemption, 3 Years 852 224 285 199 278
Expense Example, with Redemption, 5 Years 1,057 392 510 348 485
Expense Example, with Redemption, 10 Years $ 1,650 $ 880 $ 1,159 $ 783 $ 1,082
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 May 31, 2026, the Fund’s portfolio turnover rate was 20% of the average value of its portfolio.

Portfolio Turnover, Rate 20.00%
Nuveen Lifestyle Moderate Fund | Class A  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifestyle Moderate Fund | Class I  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifestyle Moderate Fund | Premier Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifestyle Moderate Fund | Class R6  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifestyle Moderate Fund | Retirement Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifestyle Growth 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 in 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 130 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 84 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 Lifestyle Growth Fund - USD ($)
Class A
Class I
Premier Class
Class R6
Retirement Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 5.75% 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 Lifestyle Growth Fund
Class A
Class I
Premier Class
Class R6
Retirement Class
Management Fees (as a percentage of Assets) 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%
Other Expenses (as a percentage of Assets): 0.10% 0.12% 0.16% 0.04% 0.29%
Acquired Fund Fees and Expenses [1],[2] 0.54% 0.54% 0.54% 0.54% 0.54%
Expenses (as a percentage of Assets) 0.99% 0.76% 0.95% 0.68% 0.93%
Fee Waiver or Reimbursement [3] (0.08%) (0.07%) (0.19%) (0.07%) (0.07%)
Net Expenses (as a percentage of Assets) 0.91% 0.69% 0.76% 0.61% 0.86%
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]

Restated to reflect estimate for the current fiscal year.

[2]

“Acquired fund fees and expenses” are the Fund’s proportionate amount of the expenses of any investment companies or pools in which it invests. These expenses are not paid directly by Fund shareholders. Instead, Fund shareholders bear these expenses indirectly because they reduce Fund performance. Because “Acquired fund fees and expenses” are included in the chart above, the Fund’s operating expenses here will not correlate with the expenses included in the Financial highlights in this Prospectus and the Fund’s Form N-CSR.

[3]

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) 0.450% of average daily net assets for Class A shares; (ii) 0.250% of average daily net assets for Class I shares; (iii) 0.250% of average daily net assets for Premier Class shares; (iv) 0.100% of average daily net assets for Class R6 shares; and (v) 0.350% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least September 30, 2027, unless changed with approval of the Board of Trustees. Nuveen Fund Advisors 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 Lifestyle Growth Fund - USD ($)
Class A
Class I
Premier Class
Class R6
Retirement Class
Expense Example, with Redemption, 1 Year $ 663 $ 70 $ 78 $ 62 $ 88
Expense Example, with Redemption, 3 Years 858 230 267 204 283
Expense Example, with Redemption, 5 Years 1,077 409 491 366 502
Expense Example, with Redemption, 10 Years $ 1,705 $ 930 $ 1,134 $ 834 $ 1,131
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 May 31, 2026, the Fund’s portfolio turnover rate was 21% of the average value of its portfolio.

Portfolio Turnover, Rate 21.00%
Nuveen Lifestyle Growth Fund | Class A  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifestyle Growth Fund | Class I  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifestyle Growth Fund | Premier Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifestyle Growth Fund | Class R6  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifestyle Growth Fund | Retirement Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifestyle Aggressive Growth 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 in 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 130 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 84 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 Lifestyle Aggressive Growth Fund - USD ($)
Class A
Class I
Premier Class
Class R6
Retirement Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 5.75% 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 Lifestyle Aggressive Growth Fund
Class A
Class I
Premier Class
Class R6
Retirement Class
Management Fees (as a percentage of Assets) 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%
Other Expenses (as a percentage of Assets): 0.12% 0.13% 0.34% 0.05% 0.30%
Acquired Fund Fees and Expenses [1],[2] 0.57% 0.57% 0.57% 0.57% 0.57%
Expenses (as a percentage of Assets) 1.04% 0.80% 1.16% 0.72% 0.97%
Fee Waiver or Reimbursement [3] (0.05%) (0.05%) (0.34%) (0.05%) (0.05%)
Net Expenses (as a percentage of Assets) 0.99% 0.75% 0.82% 0.67% 0.92%
Fee Waiver or Reimbursement over Assets, Date of Termination September 30, 2027 September 30, 2027 September 30, 2027 September 30, 2027 September 30, 2027
[1]

Restated to reflect estimate for the current fiscal year.

[2]

“Acquired fund fees and expenses” are the Fund’s proportionate amount of the expenses of any investment companies or pools in which it invests. These expenses are not paid directly by Fund shareholders. Instead, Fund shareholders bear these expenses indirectly because they reduce Fund performance. Because “Acquired fund fees and expenses” are included in the chart above, the Fund’s operating expenses here will not correlate with the expenses included in the Financial highlights in this Prospectus and the Fund’s Form N-CSR.

[3]

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) 0.450% of average daily net assets for Class A shares; (ii) 0.250% of average daily net assets for Class I shares; (iii) 0.250% of average daily net assets for Premier Class shares; (iv) 0.100% of average daily net assets for Class R6 shares; and (v) 0.350% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least September 30, 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 duration 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 Lifestyle Aggressive Growth Fund - USD ($)
Class A
Class I
Premier Class
Class R6
Retirement Class
Expense Example, with Redemption, 1 Year $ 670 $ 77 $ 84 $ 68 $ 94
Expense Example, with Redemption, 3 Years 882 250 335 225 304
Expense Example, with Redemption, 5 Years 1,111 439 606 396 531
Expense Example, with Redemption, 10 Years $ 1,769 $ 985 $ 1,379 $ 890 $ 1,185
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 May 31, 2026, the Fund’s portfolio turnover rate was 23% of the average value of its portfolio.

Portfolio Turnover, Rate 23.00%
Nuveen Lifestyle Aggressive Growth Fund | Class A  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifestyle Aggressive Growth Fund | Class I  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifestyle Aggressive Growth Fund | Premier Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifestyle Aggressive Growth Fund | Class R6  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Lifestyle Aggressive Growth Fund | Retirement Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Managed Allocation 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 in 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 69 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 84 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 Managed Allocation Fund - USD ($)
Class A
Class R6
Retirement Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 5.75% 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 Managed Allocation Fund
Class A
Class R6
Retirement Class
Management Fees (as a percentage of Assets) 0.00% 0.00% 0.00%
Distribution and Service (12b-1) Fees 0.25% 0.00% 0.00%
Other Expenses (as a percentage of Assets): 0.06% 0.01% 0.26%
Acquired Fund Fees and Expenses [1],[2] 0.50% 0.50% 0.50%
Expenses (as a percentage of Assets) 0.81% 0.51% 0.76%
Fee Waiver or Reimbursement [3] (0.06%) (0.01%) (0.01%)
Net Expenses (as a percentage of Assets) 0.75% 0.50% 0.75%
Fee Waiver or Reimbursement over Assets, Date of Termination September 30, 2027 September 30, 2027 September 30, 2027
[1]

Restated to reflect estimate for the current fiscal year.

[2]

“Acquired fund fees and expenses” are the Fund’s proportionate amount of the expenses of any investment companies or pools in which it invests. These expenses are not paid directly by Fund shareholders. Instead, Fund shareholders bear these expenses indirectly because they reduce Fund performance. Because “Acquired fund fees and expenses” are included in the chart above, the Fund’s operating expenses here will not correlate with the expenses included in the Financial highlights in this Prospectus and the Fund’s Form N-CSR.

[3]

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) 0.250% of average daily net assets for Retirement class shares; (ii) 0.250% of average daily net assets for Class A shares; (iii) 0.000% of average daily net assets for Class R6 shares of the Fund. These expense reimbursement arrangements will continue through at least September 30, 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 duration 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 Managed Allocation Fund - USD ($)
Class A
Class R6
Retirement Class
Expense Example, with Redemption, 1 Year $ 647 $ 51 $ 77
Expense Example, with Redemption, 3 Years 813 163 242
Expense Example, with Redemption, 5 Years 993 284 421
Expense Example, with Redemption, 10 Years $ 1,514 $ 640 $ 941
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 May 31, 2026, the Fund’s portfolio turnover rate was 19% of the average value of its portfolio.

Portfolio Turnover, Rate 19.00%
Nuveen Managed Allocation Fund | Class A  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Managed Allocation Fund | Class R6  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.
Nuveen Managed Allocation Fund | Retirement Class  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] Restated to reflect estimate for the current fiscal year.