v3.25.4
Variable Interest Entities - Nonconsolidated Variable Interest Entities (Detail) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Variable Interest Entity [Line Items]    
Total assets $ 1,809,320 $ 1,675,972
Total liabilities 1,684,348 1,553,976
Variable Interest Entity, Not Primary Beneficiary    
Variable Interest Entity [Line Items]    
Assets in VIEs 271,331 206,500
Total assets 17,746 16,710
Total liabilities 3,016 2,754
Maximum exposure to loss: 29,107 27,501
Retained interests | Variable Interest Entity, Not Primary Beneficiary    
Variable Interest Entity [Line Items]    
Maximum exposure to loss: 6,458 5,848
Purchased interests | Variable Interest Entity, Not Primary Beneficiary    
Variable Interest Entity [Line Items]    
Maximum exposure to loss: 681 767
Commitments and guarantees | Variable Interest Entity, Not Primary Beneficiary    
Variable Interest Entity [Line Items]    
Maximum exposure to loss: 6,239 5,034
Derivatives | Variable Interest Entity, Not Primary Beneficiary    
Variable Interest Entity [Line Items]    
Maximum exposure to loss: 9,445 8,974
Debt and equity | Variable Interest Entity, Not Primary Beneficiary    
Variable Interest Entity [Line Items]    
Maximum exposure to loss: 6,284 6,878
Mortgage-backed | Variable Interest Entity, Not Primary Beneficiary    
Variable Interest Entity [Line Items]    
Assets in VIEs 180,240 128,378
Total assets 6,094 5,618
Maximum exposure to loss: 6,095 5,619
Mortgage-backed | Retained interests | Variable Interest Entity, Not Primary Beneficiary    
Variable Interest Entity [Line Items]    
Maximum exposure to loss: 5,947 5,355
Mortgage-backed | Purchased interests | Variable Interest Entity, Not Primary Beneficiary    
Variable Interest Entity [Line Items]    
Maximum exposure to loss: 147 263
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 67,290 55,311
Total assets 7,073 6,978
Total liabilities 2,587 2,315
Maximum exposure to loss: 9,870 8,969
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: 5,376 4,138
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: 4,494 4,831
Corporate debt and other asset-backed | Variable Interest Entity, Not Primary Beneficiary    
Variable Interest Entity [Line Items]    
Assets in VIEs 23,801 22,811
Total assets 4,579 4,114
Total liabilities 429 439
Maximum exposure to loss: 13,142 12,913
Corporate debt and other asset-backed | Retained interests | Variable Interest Entity, Not Primary Beneficiary    
Variable Interest Entity [Line Items]    
Maximum exposure to loss: 511 493
Corporate debt and other asset-backed | Purchased interests | Variable Interest Entity, Not Primary Beneficiary    
Variable Interest Entity [Line Items]    
Maximum exposure to loss: 534 504
Corporate debt and other asset-backed | Commitments and guarantees | Variable Interest Entity, Not Primary Beneficiary    
Variable Interest Entity [Line Items]    
Maximum exposure to loss: 863 896
Corporate debt and other asset-backed | Derivatives | Variable Interest Entity, Not Primary Beneficiary    
Variable Interest Entity [Line Items]    
Maximum exposure to loss: 9,444 8,973
Corporate debt and other asset-backed | Debt and equity | Variable Interest Entity, Not Primary Beneficiary    
Variable Interest Entity [Line Items]    
Maximum exposure to loss: $ 1,790 $ 2,047