Class I [Member] Annual Fund Operating Expenses - Class I - Putnam Government Money Market Fund - Class I Shares |
Sep. 30, 2025 |
|---|---|
| Prospectus [Line Items] | |
| Management Fees (as a percentage of Assets) | 0.26% |
| Distribution and Service (12b-1) Fees | 0.00% |
| Other Expenses (as a percentage of Assets): | 0.07% |
| Expenses (as a percentage of Assets) | 0.33% |