v3.25.4
Since Inception [Member] Expense Example - Putnam Retirement Advantage Maturity Fund
Aug. 31, 2025
USD ($)
Class R5 Shares  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 56
Expense Example, with Redemption, 3 Years 176
Expense Example, with Redemption, 5 Years 664
Expense Example, with Redemption, 10 Years 2,015
Class A Shares  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 478
Expense Example, with Redemption, 3 Years 645
Expense Example, with Redemption, 5 Years 1,164
Expense Example, with Redemption, 10 Years 2,590
Class C Shares  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 258
Expense Example, with Redemption, 3 Years 490
Expense Example, with Redemption, 5 Years 1,187
Expense Example, with Redemption, 10 Years 2,867
Class R Shares  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 122
Expense Example, with Redemption, 3 Years 381
Expense Example, with Redemption, 5 Years 1,006
Expense Example, with Redemption, 10 Years 2,695
Class Y Shares  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 56
Expense Example, with Redemption, 3 Years 176
Expense Example, with Redemption, 5 Years 664
Expense Example, with Redemption, 10 Years 2,015
Class R6 Shares  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 46
Expense Example, with Redemption, 3 Years 144
Expense Example, with Redemption, 5 Years 611
Expense Example, with Redemption, 10 Years 1,907
Class R3 Shares  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 97
Expense Example, with Redemption, 3 Years 303
Expense Example, with Redemption, 5 Years 876
Expense Example, with Redemption, 10 Years 2,439
Class R4 Shares  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 72
Expense Example, with Redemption, 3 Years 225
Expense Example, with Redemption, 5 Years 746
Expense Example, with Redemption, 10 Years $ 2,177