v3.26.1
Loans and Related Allowance for Credit Losses, Payment Performance of Consumer Loan Modifications (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Total Commercial [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans modified during the period $ 2,975   $ 2,975  
Charge-offs 5 $ 87 46 $ 102
Accounts, Notes, Loans and Financing Receivable Textual [Abstract]        
Loans modified, commitment to lend additional funds     314 235
Total Commercial [Member] | Current-29 days past due [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans modified during the period 2,740   2,740  
Total Commercial [Member] | 30-89 days past due [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans modified during the period 50   50  
Total Commercial [Member] | 90 days or more past due [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans modified during the period 185   185  
Total Commercial [Member] | Excluding modifications in payment deferral period member [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans modified during the period   3,692   3,692
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   3,637   3,637
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   37   37
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   18   18
Total Consumer [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans modified during the period 1,741   1,741  
Charge-offs 72 83 124 157
Accounts, Notes, Loans and Financing Receivable Textual [Abstract]        
Loans modified during the period, subsequent default 120 113 206 148
Total Consumer [Member] | Current-29 days past due [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans modified during the period 1,128   1,128  
Total Consumer [Member] | 30-89 days past due [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans modified during the period 206   206  
Total Consumer [Member] | 90 days or more past due [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans modified during the period 407   407  
Total Consumer [Member] | Excluding modifications in payment deferral period member [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans modified during the period   1,550   1,550
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   1,167   1,167
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   227   227
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   156   156
Total Consumer [Member] | Residential mortgage [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans modified during the period 819   819  
Charge-offs 3 3 4 4
Total Consumer [Member] | Residential mortgage [Member] | Current-29 days past due [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans modified during the period 380   380  
Total Consumer [Member] | Residential mortgage [Member] | 30-89 days past due [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans modified during the period 110   110  
Total Consumer [Member] | Residential mortgage [Member] | 90 days or more past due [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans modified during the period 329   329  
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   562   562
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   376   376
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   112   112
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   74   74
Total Consumer [Member] | Credit card [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans modified during the period 922   922  
Charge-offs 69 80 $ 120 $ 153
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] | Current-29 days past due [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans modified during the period 748   $ 748  
Total Consumer [Member] | Credit card [Member] | 30-89 days past due [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans modified during the period 96   96  
Total Consumer [Member] | Credit card [Member] | 90 days or more past due [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans modified during the period $ 78   $ 78  
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   988   $ 988
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   791   791
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   115   115
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   $ 82   $ 82