v3.26.1
Loans and Allowance for Credit Losses - Loans by Portfolio Class, Including Delinquency Status (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Financing Receivable, Recorded Investment, Past Due [Line Items]          
Total loans $ 410,300   $ 410,300   $ 391,335
Loans purchased from GNMA mortgage pools          
Financing Receivable, Recorded Investment, Past Due [Line Items]          
Interest income on nonperforming loans 4 $ 6 8 $ 10  
Nonperforming          
Financing Receivable, Recorded Investment, Past Due [Line Items]          
Total loans 1,303   1,303   1,547
Current          
Financing Receivable, Recorded Investment, Past Due [Line Items]          
Total loans 407,181   407,181   387,627
30-89 Days Past Due          
Financing Receivable, Recorded Investment, Past Due [Line Items]          
Total loans 1,081   1,081   1,308
90 Days or More Past Due          
Financing Receivable, Recorded Investment, Past Due [Line Items]          
Total loans 735   735   853
Commercial | Commercial          
Financing Receivable, Recorded Investment, Past Due [Line Items]          
Total loans 159,655   159,655   148,161
Commercial | Commercial | Nonperforming          
Financing Receivable, Recorded Investment, Past Due [Line Items]          
Total loans 402   402   717
Commercial | Commercial | Current          
Financing Receivable, Recorded Investment, Past Due [Line Items]          
Total loans 159,030   159,030   147,077
Commercial | Commercial | 30-89 Days Past Due          
Financing Receivable, Recorded Investment, Past Due [Line Items]          
Total loans 211   211   347
Commercial | Commercial | 90 Days or More Past Due          
Financing Receivable, Recorded Investment, Past Due [Line Items]          
Total loans 12   12   20
Commercial | Commercial real estate          
Financing Receivable, Recorded Investment, Past Due [Line Items]          
Total loans 52,348   52,348   48,920
Commercial | Commercial real estate | Nonperforming          
Financing Receivable, Recorded Investment, Past Due [Line Items]          
Total loans 568   568   518
Commercial | Commercial real estate | Current          
Financing Receivable, Recorded Investment, Past Due [Line Items]          
Total loans 51,707   51,707   48,340
Commercial | Commercial real estate | 30-89 Days Past Due          
Financing Receivable, Recorded Investment, Past Due [Line Items]          
Total loans 68   68   49
Commercial | Commercial real estate | 90 Days or More Past Due          
Financing Receivable, Recorded Investment, Past Due [Line Items]          
Total loans 5   5   13
Consumer | Residential mortgages          
Financing Receivable, Recorded Investment, Past Due [Line Items]          
Total loans 117,311   117,311   115,885
Consumer | Residential mortgages | Loans purchased from GNMA mortgage pools          
Financing Receivable, Recorded Investment, Past Due [Line Items]          
Loans 30-89 days past due purchased from Government National Mortgage Association mortgage pools, classified as current 374   374   606
Loans 90 days or more past due purchased from Government National Mortgage Association mortgage pools, classified as current 3,900   3,900   3,500
Consumer | Residential mortgages | Nonperforming          
Financing Receivable, Recorded Investment, Past Due [Line Items]          
Total loans 171   171   151
Consumer | Residential mortgages | Current          
Financing Receivable, Recorded Investment, Past Due [Line Items]          
Total loans 116,724   116,724   115,235
Consumer | Residential mortgages | 30-89 Days Past Due          
Financing Receivable, Recorded Investment, Past Due [Line Items]          
Total loans 180   180   214
Consumer | Residential mortgages | 90 Days or More Past Due          
Financing Receivable, Recorded Investment, Past Due [Line Items]          
Total loans 236   236   285
Consumer | Credit card          
Financing Receivable, Recorded Investment, Past Due [Line Items]          
Total loans 39,079   39,079   38,031
Consumer | Credit card | Nonperforming          
Financing Receivable, Recorded Investment, Past Due [Line Items]          
Total loans 0   0   0
Consumer | Credit card | Current          
Financing Receivable, Recorded Investment, Past Due [Line Items]          
Total loans 38,179   38,179   37,037
Consumer | Credit card | 30-89 Days Past Due          
Financing Receivable, Recorded Investment, Past Due [Line Items]          
Total loans 459   459   511
Consumer | Credit card | 90 Days or More Past Due          
Financing Receivable, Recorded Investment, Past Due [Line Items]          
Total loans 441   441   483
Consumer | Other retail          
Financing Receivable, Recorded Investment, Past Due [Line Items]          
Total loans 41,907   41,907   40,338
Consumer | Other retail | Nonperforming          
Financing Receivable, Recorded Investment, Past Due [Line Items]          
Total loans 162   162   161
Consumer | Other retail | Current          
Financing Receivable, Recorded Investment, Past Due [Line Items]          
Total loans 41,541   41,541   39,938
Consumer | Other retail | 30-89 Days Past Due          
Financing Receivable, Recorded Investment, Past Due [Line Items]          
Total loans 163   163   187
Consumer | Other retail | 90 Days or More Past Due          
Financing Receivable, Recorded Investment, Past Due [Line Items]          
Total loans $ 41   $ 41   $ 52