v3.25.3
S000034192 [Member] Expense Example - Putnam Ultra Short Duration Income Fund
Jul. 31, 2025
USD ($)
Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 43
Expense Example, with Redemption, 3 Years 146
Expense Example, with Redemption, 5 Years 258
Expense Example, with Redemption, 10 Years 588
Class C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 84
Expense Example, with Redemption, 3 Years 273
Expense Example, with Redemption, 5 Years 477
Expense Example, with Redemption, 10 Years 952
Class R  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 84
Expense Example, with Redemption, 3 Years 273
Expense Example, with Redemption, 5 Years 477
Expense Example, with Redemption, 10 Years 1,068
Class Y  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 33
Expense Example, with Redemption, 3 Years 114
Expense Example, with Redemption, 5 Years 202
Expense Example, with Redemption, 10 Years 462
Class R6  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 30
Expense Example, with Redemption, 3 Years 102
Expense Example, with Redemption, 5 Years 182
Expense Example, with Redemption, 10 Years 415
Class N Shares  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 207
Expense Example, with Redemption, 3 Years 340
Expense Example, with Redemption, 5 Years 485
Expense Example, with Redemption, 10 Years $ 864