v3.25.4
S000000778 [Member] Expense Example - Putnam Dynamic Asset Allocation Balanced Fund
Sep. 30, 2025
USD ($)
Class P  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 56
Expense Example, with Redemption, 3 Years 176
Expense Example, with Redemption, 5 Years 307
Expense Example, with Redemption, 10 Years 689
Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 662
Expense Example, with Redemption, 3 Years 846
Expense Example, with Redemption, 5 Years 1,046
Expense Example, with Redemption, 10 Years 1,620
Class C  
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 R  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 117
Expense Example, with Redemption, 3 Years 365
Expense Example, with Redemption, 5 Years 632
Expense Example, with Redemption, 10 Years 1,398
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 R5  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 70
Expense Example, with Redemption, 3 Years 221
Expense Example, with Redemption, 5 Years 384
Expense Example, with Redemption, 10 Years 859
Class R6  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 60
Expense Example, with Redemption, 3 Years 189
Expense Example, with Redemption, 5 Years 330
Expense Example, with Redemption, 10 Years $ 739