v3.25.2
Loans - Consumer, Excluding Credit Card Loan Portfolio, Residential Real Estate, Nonaccrual Loans and Other Credit Quality Indicators (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Total retained loans $ 1,345,473 $ 1,273,047 $ 1,345,473 $ 1,273,047 $ 1,299,590
Consumer, excluding credit card          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Total retained loans 371,855 382,795 371,855 382,795 376,334
Consumer, excluding credit card | Residential real estate          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Nonaccrual loans 3,706   3,706   2,984
Total retained loans $ 305,061   $ 305,061   $ 309,513
Weighted average LTV ratio 46.00%   46.00%   47.00%
Weighted average FICO 774   774   774
Approximate percentage of Chapter 7 loans 30 days or more past due     8.00%    
Interest income on nonaccrual loans recognized on a cash basis $ 37 $ 42 $ 74 $ 85  
Consumer, excluding credit card | Residential real estate | California          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Total retained loans 118,798   118,798   $ 120,944
Consumer, excluding credit card | Residential real estate | New York          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Total retained loans 46,348   46,348   46,854
Consumer, excluding credit card | Residential real estate | Florida          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Total retained loans 21,748   21,748   21,820
Consumer, excluding credit card | Residential real estate | Texas          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Total retained loans 14,364   14,364   14,531
Consumer, excluding credit card | Residential real estate | Massachusetts          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Total retained loans 13,230   13,230   13,511
Consumer, excluding credit card | Residential real estate | Colorado          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Total retained loans 10,418   10,418   10,465
Consumer, excluding credit card | Residential real estate | Illinois          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Total retained loans 9,445   9,445   9,835
Consumer, excluding credit card | Residential real estate | Washington          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Total retained loans 9,368   9,368   9,372
Consumer, excluding credit card | Residential real estate | New Jersey          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Total retained loans 7,415   7,415   7,554
Consumer, excluding credit card | Residential real estate | Connecticut          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Total retained loans 6,808   6,808   6,854
Consumer, excluding credit card | Residential real estate | All other          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Total retained loans 47,119   47,119   47,773
Consumer, excluding credit card | Residential real estate | No FICO/LTV available          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Total retained loans 679   679   906
Consumer, excluding credit card | Residential real estate | Greater than 125% and refreshed FICO scores | Equal to or greater than 660          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Total retained loans 35   35   72
Consumer, excluding credit card | Residential real estate | Greater than 125% and refreshed FICO scores | Less than 660          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Total retained loans 6   6   3
Consumer, excluding credit card | Residential real estate | 101% to 125% and refreshed FICO scores | Equal to or greater than 660          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Total retained loans 134   134   161
Consumer, excluding credit card | Residential real estate | 101% to 125% and refreshed FICO scores | Less than 660          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Total retained loans 3   3   5
Consumer, excluding credit card | Residential real estate | 80% to 100% and refreshed FICO scores | Equal to or greater than 660          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Total retained loans 4,516   4,516   4,962
Consumer, excluding credit card | Residential real estate | 80% to 100% and refreshed FICO scores | Less than 660          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Total retained loans 63   63   73
Consumer, excluding credit card | Residential real estate | Lower than 80% and refreshed FICO scores | Equal to or greater than 660          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Total retained loans 291,229   291,229   294,797
Consumer, excluding credit card | Residential real estate | Lower than 80% and refreshed FICO scores | Less than 660          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Total retained loans $ 8,396   $ 8,396   $ 8,534