v3.25.1
Label Element Value
Prospectus [Line Items] rr_ProspectusLineItems  
Document Type dei_DocumentType 497
Document Period End Date dei_DocumentPeriodEndDate Dec. 31, 2024
Entity Registrant Name dei_EntityRegistrantName Putnam Target Date Funds
Entity Central Index Key dei_EntityCentralIndexKey 0001295293
Entity Inv Company Type dei_EntityInvCompanyType N-1A
Amendment Flag dei_AmendmentFlag false
Putnam Sustainable Retirement Maturity Fund  
Prospectus [Line Items] rr_ProspectusLineItems  
Expense [Heading] rr_ExpenseHeading Fees and Expenses.
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

The following tables describe the fees and expenses you may pay if you buy and hold shares of the funds, the annual operating expenses for each fund, and the pro forma expenses of Putnam Sustainable Retirement Maturity Fund, assuming consummation of the merger and based on pro forma combined assets as of January 31, 2025 . Please see “Information about the Merger – Trustees’ Considerations Relating to the Merger” for information about the expenses of the merger. The shareholder fees (fees paid directly from your investment) are the same for all classes of each fund except for Class A shares and will not change as a result of the merger, except for Class A shares. Annual fund operating expenses (expenses that are deducted from fund assets) are described in the table below.

 

Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment) Putnam Sustainable Retirement Maturity Fund
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that are deducted from fund assets) Putnam Sustainable Retirement Maturity Fund
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination November 30, 2027
Expense Example [Heading] rr_ExpenseExampleHeading Examples
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

The following hypothetical examples are intended to help you compare the cost of investing in either fund with the cost of investing in other funds. It assumes that you invest $10,000 in a fund for the time periods indicated and then, except as indicated, redeem all your shares at the end of those periods. It assumes a 5% return on your investment each year and that each fund’s operating expenses remain the same. Your actual costs may be higher or lower.

 

Bar Chart [Heading] rr_BarChartHeading Annual total returns for class A shares before sales charges
Annual Return 2015 rr_AnnualReturn2015 (0.58%)
Annual Return 2016 rr_AnnualReturn2016 2.52%
Annual Return 2017 rr_AnnualReturn2017 6.80%
Annual Return 2018 rr_AnnualReturn2018 (4.13%)
Annual Return 2019 rr_AnnualReturn2019 8.46%
Annual Return 2020 rr_AnnualReturn2020 1.01%
Annual Return 2021 rr_AnnualReturn2021 1.00%
Annual Return 2022 rr_AnnualReturn2022 (4.42%)
Annual Return 2023 rr_AnnualReturn2023 9.29%
Annual Return 2024 rr_AnnualReturn2024 6.65%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best calendar quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Dec. 31, 2023
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 8.56%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst calendar quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2020
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (5.69%)
Performance Table Heading rr_PerformanceTableHeading Average annual total returns after sales charges For periods ended 12/31/24
Putnam Sustainable Retirement Maturity Fund | Bloomberg U.S. Aggregate Index (no deduction for fees, expenses or taxes)  
Prospectus [Line Items] rr_ProspectusLineItems  
1 Year rr_AverageAnnualReturnYear01 1.25%
5 Years rr_AverageAnnualReturnYear05 (0.33%)
10 Years rr_AverageAnnualReturnYear10 1.35%
Putnam Sustainable Retirement Maturity Fund | Russell 3000® Index (no deduction for fees, expenses or taxes)  
Prospectus [Line Items] rr_ProspectusLineItems  
1 Year rr_AverageAnnualReturnYear01 23.81%
5 Years rr_AverageAnnualReturnYear05 13.86%
10 Years rr_AverageAnnualReturnYear10 12.55%
Putnam Sustainable Retirement Maturity Fund | S&P Target Date To Retirement Income Index (no deduction for fees, expenses or taxes)  
Prospectus [Line Items] rr_ProspectusLineItems  
1 Year rr_AverageAnnualReturnYear01 6.00%
5 Years rr_AverageAnnualReturnYear05 3.68%
10 Years rr_AverageAnnualReturnYear10 4.00%
Putnam Sustainable Retirement Maturity Fund | Class A Maturity  
Prospectus [Line Items] rr_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 4.00%
Maximum Deferred Sales Charge (as a percentage) rr_MaximumDeferredSalesChargeOverOther 1.00% [1]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.46%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.19%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.43%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.33%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.48%) [2]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.85%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 483
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 660
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 959
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,809
1 Year rr_AverageAnnualReturnYear01 2.38%
5 Years rr_AverageAnnualReturnYear05 1.76%
10 Years rr_AverageAnnualReturnYear10 2.13%
Putnam Sustainable Retirement Maturity Fund | Class A Maturity | After Taxes on Distributions  
Prospectus [Line Items] rr_ProspectusLineItems  
1 Year rr_AverageAnnualReturnYear01 0.95%
5 Years rr_AverageAnnualReturnYear05 0.27%
10 Years rr_AverageAnnualReturnYear10 0.90%
Putnam Sustainable Retirement Maturity Fund | Class A Maturity | After Taxes on Distributions and Sales  
Prospectus [Line Items] rr_ProspectusLineItems  
1 Year rr_AverageAnnualReturnYear01 1.40%
5 Years rr_AverageAnnualReturnYear05 0.72%
10 Years rr_AverageAnnualReturnYear10 1.12%
Putnam Sustainable Retirement Maturity Fund | Class C Maturity  
Prospectus [Line Items] rr_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage) rr_MaximumDeferredSalesChargeOverOther 1.00% [3]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.46%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.19%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.43%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 2.08%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.48%) [2]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.60%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 263
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 505
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 978
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,093
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 163
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 505
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 978
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,093
1 Year rr_AverageAnnualReturnYear01 4.88%
5 Years rr_AverageAnnualReturnYear05 1.83%
10 Years rr_AverageAnnualReturnYear10 1.94%
Putnam Sustainable Retirement Maturity Fund | Class R Maturity  
Prospectus [Line Items] rr_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage) rr_MaximumDeferredSalesChargeOverOther none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.46%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.50%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.34%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.43%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.73%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.48%) [2]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.25%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 127
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 396
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 795
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,912
1 Year rr_AverageAnnualReturnYear01 6.25%
5 Years rr_AverageAnnualReturnYear05 2.21%
10 Years rr_AverageAnnualReturnYear10 2.23%
Putnam Sustainable Retirement Maturity Fund | Class R3 Maturity  
Prospectus [Line Items] rr_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage) rr_MaximumDeferredSalesChargeOverOther none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.46%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.34%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.43%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.48%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.48%) [2]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.00%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 102
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 318
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 662
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,636
1 Year rr_AverageAnnualReturnYear01 6.47% [4]
5 Years rr_AverageAnnualReturnYear05 2.43% [4]
10 Years rr_AverageAnnualReturnYear10 2.39% [4]
Putnam Sustainable Retirement Maturity Fund | Class R4 Maturity  
Prospectus [Line Items] rr_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage) rr_MaximumDeferredSalesChargeOverOther none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.46%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.34%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.43%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.23%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.48%) [2]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.75%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 77
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 240
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 529
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,354
1 Year rr_AverageAnnualReturnYear01 6.76% [5]
5 Years rr_AverageAnnualReturnYear05 2.69% [5]
10 Years rr_AverageAnnualReturnYear10 2.65% [5]
Putnam Sustainable Retirement Maturity Fund | Class R5 Maturity  
Prospectus [Line Items] rr_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage) rr_MaximumDeferredSalesChargeOverOther none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.46%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.19%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.43%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.08%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.48%) [2]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.60%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 61
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 192
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 447
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,179
1 Year rr_AverageAnnualReturnYear01 6.95% [6]
5 Years rr_AverageAnnualReturnYear05 2.86% [6]
10 Years rr_AverageAnnualReturnYear10 2.80% [6]
Putnam Sustainable Retirement Maturity Fund | Class R6 Maturity  
Prospectus [Line Items] rr_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage) rr_MaximumDeferredSalesChargeOverOther none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.46%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.09%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.43%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.98%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.48%) [2]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.50%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 51
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 160
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 393
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,062
1 Year rr_AverageAnnualReturnYear01 7.00% [7]
5 Years rr_AverageAnnualReturnYear05 2.95% [7]
10 Years rr_AverageAnnualReturnYear10 2.88% [7]
Putnam Sustainable Retirement Maturity Fund | Class Y Maturity  
Prospectus [Line Items] rr_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage) rr_MaximumDeferredSalesChargeOverOther none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.46%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.19%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.43%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.08%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.48%) [2]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.60%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 61
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 192
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 447
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,179
1 Year rr_AverageAnnualReturnYear01 6.88%
5 Years rr_AverageAnnualReturnYear05 2.85%
10 Years rr_AverageAnnualReturnYear10 2.80%
[1] Applies only to certain redemptions of shares bought with no initial sales charge.
[2] Reflects a contractual obligation of the Investment Manager to limit certain fund expenses and acquired fund fees through November 30, 2027. This obligation may be modified or discontinued only with approval of the Board of Trustees.
[3] This charge is eliminated after one year.
[4] Performance for class R3 shares prior to their inception (1/4/21) is derived from the historical performance of class Y shares, adjusted for the higher 12b-1 fees and investor servicing fees applicable to class R3 shares (relative to the comparable fees applicable to class Y shares prior to the inception of class R3 shares).
[5] Performance for class R4 shares prior to their inception (1/4/21) is derived from the historical performance of class Y shares, adjusted for the higher investor servicing fees applicable to class R4 shares (relative to the comparable fees applicable to class Y shares prior to the inception of class R4 shares).
[6] Performance for class R5 shares prior to their inception (1/4/21) is derived from the historical performance of class R6 shares, adjusted for the higher investor servicing fees applicable to class R5 shares (relative to the comparable fees applicable to R6 shares prior to the inception of class R5 shares).
[7] Performance for class R6 shares prior to their inception (9/1/16) is derived from the historical performance of class Y shares and has not been adjusted for the lower investor servicing fees applicable to class R6 shares (relative to the comparable fees applicable to class Y shares prior to the inception of class R6 shares); had it been adjusted, returns would have been higher.