v3.26.1
Variable Interest Entities - Nonconsolidated Variable Interest Entities (Detail) - USD ($)
$ in Millions
Jun. 30, 2026
Mar. 31, 2026
Dec. 31, 2025
Variable Interest Entity [Line Items]      
Total assets $ 2,127,711 $ 2,060,180 $ 1,809,320
Total liabilities 2,004,969 $ 1,937,398 1,684,348
Variable Interest Entity, Not Primary Beneficiary      
Variable Interest Entity [Line Items]      
Assets in VIEs 292,635   271,331
Total assets 20,047   17,746
Total liabilities 3,468   3,016
Maximum exposure to loss: 30,178   29,107
Retained interests | Variable Interest Entity, Not Primary Beneficiary      
Variable Interest Entity [Line Items]      
Maximum exposure to loss: 8,374   6,458
Purchased interests | Variable Interest Entity, Not Primary Beneficiary      
Variable Interest Entity [Line Items]      
Maximum exposure to loss: 808   681
Commitments and guarantees | Variable Interest Entity, Not Primary Beneficiary      
Variable Interest Entity [Line Items]      
Maximum exposure to loss: 6,112   6,239
Derivatives | Variable Interest Entity, Not Primary Beneficiary      
Variable Interest Entity [Line Items]      
Maximum exposure to loss: 8,248   9,445
Debt and equity | Variable Interest Entity, Not Primary Beneficiary      
Variable Interest Entity [Line Items]      
Maximum exposure to loss: 6,636   6,284
Mortgage-backed | Variable Interest Entity, Not Primary Beneficiary      
Variable Interest Entity [Line Items]      
Assets in VIEs 193,183   180,240
Total assets 7,959   6,094
Maximum exposure to loss: 7,960   6,095
Mortgage-backed | Retained interests | Variable Interest Entity, Not Primary Beneficiary      
Variable Interest Entity [Line Items]      
Maximum exposure to loss: 7,778   5,947
Mortgage-backed | Purchased interests | Variable Interest Entity, Not Primary Beneficiary      
Variable Interest Entity [Line Items]      
Maximum exposure to loss: 181   147
Mortgage-backed | Derivatives | Variable Interest Entity, Not Primary Beneficiary      
Variable Interest Entity [Line Items]      
Maximum exposure to loss: 1   1
Tax credit, credit-related, real estate and other investing | Variable Interest Entity, Not Primary Beneficiary      
Variable Interest Entity [Line Items]      
Assets in VIEs 75,820   67,290
Total assets 7,237   7,073
Total liabilities 3,048   2,587
Maximum exposure to loss: 10,092   9,870
Tax credit, credit-related, real estate and other investing | Commitments and guarantees | Variable Interest Entity, Not Primary Beneficiary      
Variable Interest Entity [Line Items]      
Maximum exposure to loss: 5,473   5,376
Tax credit, credit-related, real estate and other investing | Debt and equity | Variable Interest Entity, Not Primary Beneficiary      
Variable Interest Entity [Line Items]      
Maximum exposure to loss: 4,619   4,494
Corporate debt and other asset-backed | Variable Interest Entity, Not Primary Beneficiary      
Variable Interest Entity [Line Items]      
Assets in VIEs 23,632   23,801
Total assets 4,851   4,579
Total liabilities 420   429
Maximum exposure to loss: 12,126   13,142
Corporate debt and other asset-backed | Retained interests | Variable Interest Entity, Not Primary Beneficiary      
Variable Interest Entity [Line Items]      
Maximum exposure to loss: 596   511
Corporate debt and other asset-backed | Purchased interests | Variable Interest Entity, Not Primary Beneficiary      
Variable Interest Entity [Line Items]      
Maximum exposure to loss: 627   534
Corporate debt and other asset-backed | Commitments and guarantees | Variable Interest Entity, Not Primary Beneficiary      
Variable Interest Entity [Line Items]      
Maximum exposure to loss: 639   863
Corporate debt and other asset-backed | Derivatives | Variable Interest Entity, Not Primary Beneficiary      
Variable Interest Entity [Line Items]      
Maximum exposure to loss: 8,247   9,444
Corporate debt and other asset-backed | Debt and equity | Variable Interest Entity, Not Primary Beneficiary      
Variable Interest Entity [Line Items]      
Maximum exposure to loss: $ 2,017   $ 1,790