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. |
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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.
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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% | ||||||||||||||
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