v3.25.3
Expense Example - Putnam Strategic Intermediate Municipal Fund
Jul. 31, 2025
USD ($)
Class C Shares  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 268
Expense Example, with Redemption, 3 Years 520
Expense Example, with Redemption, 5 Years 896
Expense Example, with Redemption, 10 Years 1,753
Class A Shares  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 315
Expense Example, with Redemption, 3 Years 505
Expense Example, with Redemption, 5 Years 711
Expense Example, with Redemption, 10 Years 1,307
CLASS Y  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 66
Expense Example, with Redemption, 3 Years 207
Expense Example, with Redemption, 5 Years 361
Expense Example, with Redemption, 10 Years 808
Class R6 Shares  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 57
Expense Example, with Redemption, 3 Years 179
Expense Example, with Redemption, 5 Years 312
Expense Example, with Redemption, 10 Years $ 701