v3.25.4
Class A C G P R [Member] Expense Example - Class A C G P R - Putnam Government Money Market Fund
Sep. 30, 2025
USD ($)
Class A Shares  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 46
Expense Example, with Redemption, 3 Years 144
Expense Example, with Redemption, 5 Years 252
Expense Example, with Redemption, 10 Years 567
Class C Shares  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 146
Expense Example, with Redemption, 3 Years 144
Expense Example, with Redemption, 5 Years 252
Expense Example, with Redemption, 10 Years 567
Class G Shares  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 34
Expense Example, with Redemption, 3 Years 106
Expense Example, with Redemption, 5 Years 186
Expense Example, with Redemption, 10 Years 418
Class P Shares  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 34
Expense Example, with Redemption, 3 Years 106
Expense Example, with Redemption, 5 Years 186
Expense Example, with Redemption, 10 Years 418
Class R Shares  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 46
Expense Example, with Redemption, 3 Years 144
Expense Example, with Redemption, 5 Years 252
Expense Example, with Redemption, 10 Years $ 567