v3.25.4
S000024275 [Member] Expense Example - Putnam Core Bond Fund
Oct. 31, 2025
USD ($)
Class R  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 91
Expense Example, with Redemption, 3 Years 284
Expense Example, with Redemption, 5 Years 493
Expense Example, with Redemption, 10 Years 1,096
Class R6  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 40
Expense Example, with Redemption, 3 Years 126
Expense Example, with Redemption, 5 Years 220
Expense Example, with Redemption, 10 Years 494
Class Y  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 40
Expense Example, with Redemption, 3 Years 126
Expense Example, with Redemption, 5 Years 220
Expense Example, with Redemption, 10 Years 494
Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 463
Expense Example, with Redemption, 3 Years 597
Expense Example, with Redemption, 5 Years 742
Expense Example, with Redemption, 10 Years 1,166
Class C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 242
Expense Example, with Redemption, 3 Years 441
Expense Example, with Redemption, 5 Years 761
Expense Example, with Redemption, 10 Years $ 1,464