v3.26.1
Commitments, Contingencies, Guarantees and Others - Unfunded Lending Commitments: Contractual Amount and Carrying Value (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Loss Contingencies [Line Items]    
Total unfunded lending commitments, contractual amount $ 746,940 $ 729,602
Off-balance sheet lending commitment, carrying value 107 114
Credit Card:    
Loss Contingencies [Line Items]    
Credit car lines, contractual amount 695,043 678,375
Other loan commitments    
Loss Contingencies [Line Items]    
Credit car lines, contractual amount 50,307 49,555
Off-balance sheet lending commitment, carrying value 75 82
Advised line of credit 8,800 7,800
Letter of credit    
Loss Contingencies [Line Items]    
Standby letters of credit and commercial letters of credit, contractual amount 1,590 1,672
Off-balance sheet lending commitment, carrying value $ 32 $ 32