v3.25.4
S000070572 [Member] Expense Example - Putnam Retirement Advantage 2065 Fund
Aug. 31, 2025
USD ($)
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 1,762
Expense Example, with Redemption, 10 Years 5,212
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 1,566
Expense Example, with Redemption, 10 Years 4,901
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 1,517
Expense Example, with Redemption, 10 Years 4,822
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 1,566
Expense Example, with Redemption, 10 Years 4,901
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 1,642
Expense Example, with Redemption, 10 Years 5,023
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 2,166
Expense Example, with Redemption, 10 Years 5,377
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 1,881
Expense Example, with Redemption, 10 Years 5,396
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 2,045
Expense Example, with Redemption, 10 Years $ 5,508