v3.25.2
Expense Example - Putnam Sustainable Future Fund
Apr. 30, 2025
USD ($)
Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 673
Expense Example, with Redemption, 3 Years 881
Expense Example, with Redemption, 5 Years 1,106
Expense Example, with Redemption, 10 Years 1,751
Class C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 280
Expense Example, with Redemption, 3 Years 558
Expense Example, with Redemption, 5 Years 960
Expense Example, with Redemption, 10 Years 1,887
Class R  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 129
Expense Example, with Redemption, 3 Years 402
Expense Example, with Redemption, 5 Years 696
Expense Example, with Redemption, 10 Years 1,532
Class Y  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 79
Expense Example, with Redemption, 3 Years 246
Expense Example, with Redemption, 5 Years 428
Expense Example, with Redemption, 10 Years 955
Class R6  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 67
Expense Example, with Redemption, 3 Years 210
Expense Example, with Redemption, 5 Years 367
Expense Example, with Redemption, 10 Years $ 822