Since Inception [Member] Annual Total Returns |
12 Months Ended | ||||
|---|---|---|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Putnam Retirement Advantage 2045 Fund | Class A | |||||
| Prospectus [Line Items] | |||||
| Annual Return [Percent] | 18.83% | 20.82% | (16.70%) | 17.16% | 14.64% |