v3.26.1
VARIABLE INTEREST ENTITIES, Not the Primary Beneficiary - Aggregate Assets, Liabilities Exposure to Loss (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Sep. 30, 2025
Variable Interest Entity [Line Items]    
Aggregate assets $ 91,944 $ 88,230
Aggregate liabilities 79,334 75,726
Variable Interest Entity, Not Primary Beneficiary    
Variable Interest Entity [Line Items]    
Aggregate assets 14,552 13,319
Aggregate liabilities 4,356 4,196
Our risk of loss 307 353
Variable Interest Entity, Not Primary Beneficiary | LIHTC    
Variable Interest Entity [Line Items]    
Aggregate assets 10,626 9,680
Aggregate liabilities 3,198 3,031
Our risk of loss 57 133
Variable Interest Entity, Not Primary Beneficiary | Private Equity Interests    
Variable Interest Entity [Line Items]    
Aggregate assets 3,113 3,043
Aggregate liabilities 923 948
Our risk of loss 111 105
Variable Interest Entity, Not Primary Beneficiary | Other    
Variable Interest Entity [Line Items]    
Aggregate assets 813 596
Aggregate liabilities 235 217
Our risk of loss $ 139 $ 115