Expense Example, No Redemption - PUTNAM MORTGAGE SECURITIES FUND - Class C Shares |
Sep. 30, 2025
USD ($)
|
|---|---|
| Prospectus [Line Items] | |
| Expense Example, No Redemption, 1 Year | $ 170 |
| Expense Example, No Redemption, 3 Years | 526 |
| Expense Example, No Redemption, 5 Years | 907 |
| Expense Example, No Redemption, 10 Years | $ 1,777 |