v3.25.4
S000000780 [Member] Expense Example - Putnam Dynamic Asset Allocation Growth Fund
Sep. 30, 2025
USD ($)
Class P  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 64
Expense Example, with Redemption, 3 Years 201
Expense Example, with Redemption, 5 Years 350
Expense Example, with Redemption, 10 Years 786
Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 669
Expense Example, with Redemption, 3 Years 869
Expense Example, with Redemption, 5 Years 1,085
Expense Example, with Redemption, 10 Years 1,706
Class C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 276
Expense Example, with Redemption, 3 Years 546
Expense Example, with Redemption, 5 Years 940
Expense Example, with Redemption, 10 Years 1,844
Class R  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 125
Expense Example, with Redemption, 3 Years 390
Expense Example, with Redemption, 5 Years 675
Expense Example, with Redemption, 10 Years 1,487
Class Y  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 75
Expense Example, with Redemption, 3 Years 234
Expense Example, with Redemption, 5 Years 407
Expense Example, with Redemption, 10 Years 908
Class R5  
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 68
Expense Example, with Redemption, 3 Years 214
Expense Example, with Redemption, 5 Years 373
Expense Example, with Redemption, 10 Years $ 834