v3.25.3
S000003853 [Member] Expense Example - Putnam U.S. Research Fund
Jul. 31, 2025
USD ($)
Class A Shares  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 660
Expense Example, with Redemption, 3 Years 860
Expense Example, with Redemption, 5 Years 1,076
Expense Example, with Redemption, 10 Years 1,697
Class C Shares  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 266
Expense Example, with Redemption, 3 Years 536
Expense Example, with Redemption, 5 Years 930
Expense Example, with Redemption, 10 Years 1,834
Class R Shares  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 115
Expense Example, with Redemption, 3 Years 380
Expense Example, with Redemption, 5 Years 665
Expense Example, with Redemption, 10 Years 1,480
Class Y Shares  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 50
Expense Example, with Redemption, 3 Years 209
Expense Example, with Redemption, 5 Years 382
Expense Example, with Redemption, 10 Years 883
Class R6 Shares  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 50
Expense Example, with Redemption, 3 Years 189
Expense Example, with Redemption, 5 Years 341
Expense Example, with Redemption, 10 Years $ 783