Since Inception [Member] Expense Example, No Redemption - Putnam Retirement Advantage 2060 Fund - Class C |
Aug. 31, 2025
USD ($)
|
|---|---|
| Prospectus [Line Items] | |
| Expense Example, No Redemption, 1 Year | $ 158 |
| Expense Example, No Redemption, 3 Years | 490 |
| Expense Example, No Redemption, 5 Years | 1,220 |
| Expense Example, No Redemption, 10 Years | $ 2,978 |