v3.26.1
Loans and Related Allowance for Credit Losses, Payment Performance of Consumer Loan Modifications (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Total Commercial [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Charge-offs $ 42 $ 15
Accounts, Notes, Loans and Financing Receivable Textual [Abstract]    
Loans modified, commitment to lend additional funds 166 102
Total Commercial [Member] | Excluding modifications in payment deferral period member [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified during the period 2,670 3,534
Total Commercial [Member] | Excluding modifications in payment deferral period member [Member] | Current-29 days past due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified during the period 2,444 3,490
Total Commercial [Member] | Excluding modifications in payment deferral period member [Member] | 30-89 days past due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified during the period 97 12
Total Commercial [Member] | Excluding modifications in payment deferral period member [Member] | 90 days or more past due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified during the period 129 32
Total Consumer [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Charge-offs 67 83
Accounts, Notes, Loans and Financing Receivable Textual [Abstract]    
Loans modified during the period, subsequent default 116 100
Total Consumer [Member] | Excluding modifications in payment deferral period member [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified during the period 1,810 1,494
Total Consumer [Member] | Excluding modifications in payment deferral period member [Member] | Current-29 days past due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified during the period 1,176 1,091
Total Consumer [Member] | Excluding modifications in payment deferral period member [Member] | 30-89 days past due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified during the period 220 243
Total Consumer [Member] | Excluding modifications in payment deferral period member [Member] | 90 days or more past due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified during the period 414 160
Total Consumer [Member] | Residential mortgage [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Charge-offs 1 1
Total Consumer [Member] | Residential mortgage [Member] | Excluding modifications in payment deferral period member [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified during the period 874 539
Total Consumer [Member] | Residential mortgage [Member] | Excluding modifications in payment deferral period member [Member] | Current-29 days past due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified during the period 429 355
Total Consumer [Member] | Residential mortgage [Member] | Excluding modifications in payment deferral period member [Member] | 30-89 days past due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified during the period 118 113
Total Consumer [Member] | Residential mortgage [Member] | Excluding modifications in payment deferral period member [Member] | 90 days or more past due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified during the period 327 71
Total Consumer [Member] | Credit card [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Charge-offs $ 66 $ 82
Total Consumer [Member] | Credit card [Member] | Minimum [Member]    
Accounts, Notes, Loans and Financing Receivable Textual [Abstract]    
Financing receivable, modified, payment performance to become current, period 3 months 3 months
Total Consumer [Member] | Credit card [Member] | Excluding modifications in payment deferral period member [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified during the period $ 936 $ 955
Total Consumer [Member] | Credit card [Member] | Excluding modifications in payment deferral period member [Member] | Current-29 days past due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified during the period 747 736
Total Consumer [Member] | Credit card [Member] | Excluding modifications in payment deferral period member [Member] | 30-89 days past due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified during the period 102 130
Total Consumer [Member] | Credit card [Member] | Excluding modifications in payment deferral period member [Member] | 90 days or more past due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified during the period $ 87 $ 89