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TIAA-CREF Lifestyle Growth Fund  
Risk/Return: rr_RiskReturnAbstract  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
       
TIAA-CREF
Funds		   Supplement

TIAA-CREF Lifestyle Funds


SUPPLEMENT NO. 1


dated November 8, 2019 to the Statutory Prospectus


dated October 1, 2019


Effective immediately, each Lifestyle Fund’s target allocations to the U.S. Equity market sector will include investments in Class R6 shares of the Nuveen Dividend Value Fund, a series of Nuveen Investment Funds, Inc. The Nuveen Dividend Value Fund’s investment objective is long-term growth of capital and income. Under normal market conditions, the Nuveen Dividend Value Fund invests at least 80% of its assets in equity securities. The Nuveen Dividend Value Fund’s benchmark index is the Russell 1000® Value Index. For a detailed discussion of the investment strategies and risks of the Nuveen Dividend Value Fund, see the Prospectus for the Class R6 shares of the Nuveen Dividend Value Fund available on the Nuveen Dividend Value Fund’s website, www.nuveen.com/mutual-funds, by navigating to the Nuveen Dividend Value Fund’s web page for Class R6 shares and clicking on the “Prospectus” link. By on or about January 1, 2020, Teachers Advisors, LLC, the Lifestyle Funds’ investment adviser, expects allocations to the Nuveen Dividend Value Fund to range from approximately 1% to 3% of assets, depending on the Lifestyle Fund.
Risk/Return [Heading] rr_RiskReturnHeading TIAA-CREF Lifestyle Growth Fund
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

Effective immediately, the Annual Fund Operating Expenses table for the Lifestyle Growth Fund on page 37 of the Statutory Prospectus is hereby replaced with the following:
Operating Expenses Caption [Text] rr_OperatingExpensesCaption ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination Sep. 30, 2020
Expenses Restated to Reflect Current [Text] rr_ExpensesRestatedToReflectCurrent Restated to reflect estimates for the current fiscal year.
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees “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 annual report.
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

Effective immediately, the table in the “Example” sub-section for the Lifestyle Growth Fund on page 37 of the Statutory Prospectus is hereby replaced with the following:
TIAA-CREF Lifestyle Growth Fund | Institutional Class  
Risk/Return: rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.10%
Other expenses rr_OtherExpensesOverAssets 0.13%
Acquired Fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.44% [1],[2]
Total annual Fund operating expenses rr_ExpensesOverAssets 0.67%
Waivers and expense reimbursements rr_FeeWaiverOrReimbursementOverAssets (0.13%) [3]
Total annual Fund operating expenses after fee waiver and/or expense reimbursement rr_NetExpensesOverAssets 0.54%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 55
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 201
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 360
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 822
TIAA-CREF Lifestyle Growth Fund | Advisor Class  
Risk/Return: rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.10%
Other expenses rr_OtherExpensesOverAssets 0.21% [2]
Acquired Fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.44% [1],[2]
Total annual Fund operating expenses rr_ExpensesOverAssets 0.75%
Waivers and expense reimbursements rr_FeeWaiverOrReimbursementOverAssets (0.13%) [3]
Total annual Fund operating expenses after fee waiver and/or expense reimbursement rr_NetExpensesOverAssets 0.62%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 63
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 227
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 404
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 918
TIAA-CREF Lifestyle Growth Fund | Premier Class  
Risk/Return: rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.10%
Distribution (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.15%
Other expenses rr_OtherExpensesOverAssets 0.13%
Acquired Fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.44% [1],[2]
Total annual Fund operating expenses rr_ExpensesOverAssets 0.82%
Waivers and expense reimbursements rr_FeeWaiverOrReimbursementOverAssets (0.13%) [3]
Total annual Fund operating expenses after fee waiver and/or expense reimbursement rr_NetExpensesOverAssets 0.69%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 70
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 249
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 442
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,001
TIAA-CREF Lifestyle Growth Fund | Retirement Class  
Risk/Return: rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.10%
Other expenses rr_OtherExpensesOverAssets 0.37%
Acquired Fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.44% [1],[2]
Total annual Fund operating expenses rr_ExpensesOverAssets 0.91%
Waivers and expense reimbursements rr_FeeWaiverOrReimbursementOverAssets (0.12%) [3]
Total annual Fund operating expenses after fee waiver and/or expense reimbursement rr_NetExpensesOverAssets 0.79%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 81
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 278
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 492
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,109
TIAA-CREF Lifestyle Growth Fund | Retail Class  
Risk/Return: rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.10%
Distribution (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.15%
Acquired Fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.44% [1],[2]
Total annual Fund operating expenses rr_ExpensesOverAssets 0.94%
Waivers and expense reimbursements rr_FeeWaiverOrReimbursementOverAssets (0.12%) [3]
Total annual Fund operating expenses after fee waiver and/or expense reimbursement rr_NetExpensesOverAssets 0.82%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 84
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 288
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 508
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,144
[1] "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 annual report.
[2] Restated to reflect estimates for the current fiscal year.
[3] Under the Fund's expense reimbursement arrangements, the Fund's investment adviser, Teachers Advisors, LLC ("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) 0.10% of average daily net assets for Institutional Class shares; (ii) 0.25% of average daily net assets for Advisor Class shares; (iii) 0.25% of average daily net assets for Premier Class shares; (iv) 0.35% of average daily net assets for Retirement Class shares; and (v) 0.49% of average daily net assets for Retail Class shares of the Fund. These expense reimbursement arrangements will continue through at least September 30, 2020, unless changed with approval of the Board of Trustees.