v3.25.4
Loans - Summary of Loans and Lending Commitments Accounted for at Amortized Cost by Portfolio (Detail) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Loans Receivable [Line Items]    
Forecasted period for allowance for credit losses 3 years  
Carrying Value $ 239,882 $ 200,866
Other commitments 497,119 447,126
Nonaccrual loans 3,387 3,652
Corporate    
Loans Receivable [Line Items]    
Carrying Value 30,676 29,972
Nonaccrual loans 2,065 1,977
Commercial real estate    
Loans Receivable [Line Items]    
Carrying Value 37,409 29,789
Nonaccrual loans 1,079 800
Residential real estate    
Loans Receivable [Line Items]    
Carrying Value 31,957 25,969
Nonaccrual loans 85 104
Securities-based    
Loans Receivable [Line Items]    
Carrying Value 18,079 16,477
Nonaccrual loans 0 2
Other collateralized    
Loans Receivable [Line Items]    
Carrying Value 98,999 75,107
Nonaccrual loans 121 757
Other    
Loans Receivable [Line Items]    
Carrying Value 3,020 2,149
Nonaccrual loans 37 12
Credit cards    
Loans Receivable [Line Items]    
Carrying Value 19,742 21,403
Wholesale and Consumer Portfolio Segment    
Loans Receivable [Line Items]    
Carrying Value 212,911 191,881
Wholesale and Consumer Portfolio Segment | Amortized Cost    
Loans Receivable [Line Items]    
Other commitments 238,972 262,604
Wholesale    
Loans Receivable [Line Items]    
Nonaccrual loans 3,390 3,650
Nonaccrual loans, allowance for credit losses 975 735
Nonaccrual loans, not requiring a reserve 656 585
Wholesale | Corporate    
Loans Receivable [Line Items]    
Carrying Value 29,432 28,689
Wholesale | Corporate | Amortized Cost    
Loans Receivable [Line Items]    
Other commitments 179,236 156,562
Wholesale | Commercial real estate    
Loans Receivable [Line Items]    
Carrying Value 36,261 28,899
Wholesale | Commercial real estate | Amortized Cost    
Loans Receivable [Line Items]    
Other commitments 7,109 4,969
Wholesale | Residential real estate    
Loans Receivable [Line Items]    
Carrying Value 28,700 22,243
Wholesale | Residential real estate | Amortized Cost    
Loans Receivable [Line Items]    
Other commitments 3,017 1,742
Wholesale | Securities-based    
Loans Receivable [Line Items]    
Carrying Value 18,079 16,477
Wholesale | Securities-based | Amortized Cost    
Loans Receivable [Line Items]    
Other commitments 784 1,542
Wholesale | Other collateralized    
Loans Receivable [Line Items]    
Carrying Value 97,519 74,008
Wholesale | Other collateralized | Amortized Cost    
Loans Receivable [Line Items]    
Other commitments 47,741 33,136
Wholesale | Other    
Loans Receivable [Line Items]    
Carrying Value 2,920 1,950
Wholesale | Other | Amortized Cost    
Loans Receivable [Line Items]    
Other commitments 1,085 872
Consumer | Credit cards    
Loans Receivable [Line Items]    
Carrying Value 0 19,615
Consumer | Credit cards | Amortized Cost    
Loans Receivable [Line Items]    
Other commitments $ 0 $ 63,781