Class I [Member] Annual Total Returns |
12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| Class I | PUTNAM CONVERTIBLE SECURITIES FUND | CLASS I | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 12.32% | 13.01% | 10.52% | (18.28%) | 4.40% | 45.55% | 24.74% | (2.90%) | 15.42% | 9.95% |