v3.26.1
Variable Interest Entities (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Variable Interest Entity [Line Items]      
Aggregate assets $ 493,319   $ 490,995
Aggregate liabilities 444,085   441,570
Variable Interest Entity, Not Primary Beneficiary      
Variable Interest Entity [Line Items]      
Amortization 59 $ 47  
Tax credits and other tax benefits 77 $ 61  
Aggregate assets 2,434   2,334
Aggregate liabilities 1,134   1,111
Maximum exposure to loss 2,525   2,426
Variable Interest Entity, Not Primary Beneficiary | LIHTC Investments      
Variable Interest Entity [Line Items]      
Aggregate assets 2,175   2,084
Aggregate liabilities 1,134   1,111
Maximum exposure to loss 2,175   2,084
Variable Interest Entity, Not Primary Beneficiary | Other investments      
Variable Interest Entity [Line Items]      
Aggregate assets 259   250
Aggregate liabilities 0   0
Maximum exposure to loss $ 350   $ 342