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 2055 Fund | Class A | |||||
| Prospectus [Line Items] | |||||
| Annual Return [Percent] | 20.93% | 23.80% | (17.85%) | 19.14% | 16.38% |