v3.26.1
Loans - FDM Disclosure - Modification to Borrowers (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Mar. 31, 2025
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans $ 6,595   $ 3,071
Commitments to lend on loans modified in TDRs 173 $ 225  
Financing receivable, modified, subsequent default 315    
Current      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 5,442   2,584
30-59 days      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 394   171
60-89 days      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 310   144
Greater than 90 days      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 449   172
Total Delinquent Loans      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 1,153   487
Credit Card:      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 4,143   679
Credit Card: | Current      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 3,388   459
Credit Card: | 30-59 days      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 229   62
Credit Card: | 60-89 days      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 173   48
Credit Card: | Greater than 90 days      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 353   110
Credit Card: | Total Delinquent Loans      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 755   220
Credit Card: | Domestic credit card      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 3,787   552
Credit Card: | Domestic credit card | Current      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 3,140   388
Credit Card: | Domestic credit card | 30-59 days      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 194   51
Credit Card: | Domestic credit card | 60-89 days      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 149   38
Credit Card: | Domestic credit card | Greater than 90 days      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 304   75
Credit Card: | Domestic credit card | Total Delinquent Loans      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 647   164
Credit Card: | Personal loans      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 206    
Credit Card: | Personal loans | Current      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 168    
Credit Card: | Personal loans | 30-59 days      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 21    
Credit Card: | Personal loans | 60-89 days      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 11    
Credit Card: | Personal loans | Greater than 90 days      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 6    
Credit Card: | Personal loans | Total Delinquent Loans      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 38    
Credit Card: | International card businesses      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 150   127
Credit Card: | International card businesses | Current      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 80   71
Credit Card: | International card businesses | 30-59 days      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 14   11
Credit Card: | International card businesses | 60-89 days      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 13   10
Credit Card: | International card businesses | Greater than 90 days      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 43   35
Credit Card: | International card businesses | Total Delinquent Loans      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 70   56
Consumer Banking:      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 1,484   770
Consumer Banking: | Current      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 1,218   614
Consumer Banking: | 30-59 days      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 162   89
Consumer Banking: | 60-89 days      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 80   48
Consumer Banking: | Greater than 90 days      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 24   19
Consumer Banking: | Total Delinquent Loans      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 266   156
Consumer Banking: | Auto      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 1,478   763
Consumer Banking: | Auto | Current      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 1,214   608
Consumer Banking: | Auto | 30-59 days      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 161   89
Consumer Banking: | Auto | 60-89 days      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 79   48
Consumer Banking: | Auto | Greater than 90 days      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 24   18
Consumer Banking: | Auto | Total Delinquent Loans      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 264   155
Consumer Banking: | Retail banking      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 6   7
Consumer Banking: | Retail banking | Current      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 4   6
Consumer Banking: | Retail banking | 30-59 days      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 1   0
Consumer Banking: | Retail banking | 60-89 days      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 1   0
Consumer Banking: | Retail banking | Greater than 90 days      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 0   1
Consumer Banking: | Retail banking | Total Delinquent Loans      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 2   1
Commercial Banking:      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 968   1,622
Commercial Banking: | Current      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 836   1,511
Commercial Banking: | 30-59 days      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 3   20
Commercial Banking: | 60-89 days      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 57   48
Commercial Banking: | Greater than 90 days      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 72   43
Commercial Banking: | Total Delinquent Loans      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 132   111
Commercial Banking: | Commercial and multifamily real estate      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 144   631
Commercial Banking: | Commercial and multifamily real estate | Current      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 144   631
Commercial Banking: | Commercial and multifamily real estate | 30-59 days      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 0   0
Commercial Banking: | Commercial and multifamily real estate | 60-89 days      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 0   0
Commercial Banking: | Commercial and multifamily real estate | Greater than 90 days      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 0   0
Commercial Banking: | Commercial and multifamily real estate | Total Delinquent Loans      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 0   0
Commercial Banking: | Commercial and industrial      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 824   991
Commercial Banking: | Commercial and industrial | Current      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 692   880
Commercial Banking: | Commercial and industrial | 30-59 days      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 3   20
Commercial Banking: | Commercial and industrial | 60-89 days      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 57   48
Commercial Banking: | Commercial and industrial | Greater than 90 days      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans 72   43
Commercial Banking: | Commercial and industrial | Total Delinquent Loans      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Total Loans $ 132   $ 111