v3.25.4
Since Inception [Member] Expense Example - Putnam Retirement Advantage 2060 Fund
Aug. 31, 2025
USD ($)
Class R4  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 72
Expense Example, with Redemption, 3 Years 225
Expense Example, with Redemption, 5 Years 782
Expense Example, with Redemption, 10 Years 2,306
Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 652
Expense Example, with Redemption, 3 Years 816
Expense Example, with Redemption, 5 Years 1,359
Expense Example, with Redemption, 10 Years 2,839
Class C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 258
Expense Example, with Redemption, 3 Years 490
Expense Example, with Redemption, 5 Years 1,220
Expense Example, with Redemption, 10 Years 2,978
Class R  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 122
Expense Example, with Redemption, 3 Years 381
Expense Example, with Redemption, 5 Years 1,042
Expense Example, with Redemption, 10 Years 2,819
Class Y  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 56
Expense Example, with Redemption, 3 Years 176
Expense Example, with Redemption, 5 Years 701
Expense Example, with Redemption, 10 Years 2,146
Class R6  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 46
Expense Example, with Redemption, 3 Years 144
Expense Example, with Redemption, 5 Years 647
Expense Example, with Redemption, 10 Years 2,037
Class R3  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 97
Expense Example, with Redemption, 3 Years 303
Expense Example, with Redemption, 5 Years 912
Expense Example, with Redemption, 10 Years 2,564
Class R5  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 56
Expense Example, with Redemption, 3 Years 176
Expense Example, with Redemption, 5 Years 701
Expense Example, with Redemption, 10 Years $ 2,146