Shareholder Report, Line Graph (Details) 74200166100_Putnam Sustainable Future Fund_Class A_TSR Annual {Class A} - USD ($) |
12 Months Ended | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Apr. 30, 2025 |
Apr. 30, 2024 |
Apr. 30, 2023 |
Apr. 30, 2022 |
Apr. 30, 2021 |
Apr. 30, 2020 |
Apr. 30, 2019 |
Apr. 30, 2018 |
Apr. 30, 2017 |
Apr. 30, 2016 |
Apr. 30, 2026 |
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| Class A | |||||||||||||||
| Account Value [Line Items] | |||||||||||||||
| Line Graph and Table Measure Name | Class A (with sales charge) | ||||||||||||||
| Accumulated Value | $ 19,605 | $ 19,736 | $ 15,456 | $ 16,540 | $ 22,313 | $ 13,197 | $ 12,794 | $ 11,133 | $ 10,651 | $ 9,425 | $ 22,086 | ||||
| Russell 3000 Index [Member] | |||||||||||||||
| Account Value [Line Items] | |||||||||||||||
| Line Graph and Table Measure Name | Russell 3000 Index | ||||||||||||||
| Accumulated Value | 30,227 | 27,133 | 22,186 | 21,857 | 22,560 | 14,948 | 15,106 | 13,406 | 11,858 | 10,000 | $ 39,601 | ||||
| Russell Midcap Growth Index [Member] | |||||||||||||||
| Account Value [Line Items] | |||||||||||||||
| Line Graph and Table Measure Name | Russell Midcap Growth Index | ||||||||||||||
| Accumulated Value | 28,520 | 25,094 | 20,791 | 20,464 | 24,576 | 15,961 | 15,925 | 13,537 | 11,583 | 10,000 | $ 32,187 | ||||
| Putnam Sustainable Future Linked Benchmark [Member] | |||||||||||||||
| Account Value [Line Items] | |||||||||||||||
| Line Graph and Table Measure Name | [1] | Putnam Sustainable Future Linked Benchmark† | |||||||||||||
| Accumulated Value | $ 25,900 | $ 22,789 | $ 18,881 | $ 18,584 | $ 22,319 | $ 14,495 | $ 14,462 | $ 12,294 | $ 11,733 | $ 10,000 | $ 29,230 | ||||
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