v3.26.1
Allowance for Credit Losses and Reserve for Unfunded Lending Commitments - Charge-Offs (Details)
$ in Millions
 3 Months Ended
Mar. 31, 2026
USD ($)
Financing Receivable, Credit Quality Indicator [Line Items]  
Term loan by year, year 1 $ 3
Term loan by year, year 2 231
Term loan by year, year 3 238
Term loan by year, year 4 160
Term loan by year, year 5 127
Prior 139
Total Term Loans 898
Revolving Loans 4,429
Revolving Loans Converted to Term 118
Total 5,445
Credit Card:  
Financing Receivable, Credit Quality Indicator [Line Items]  
Term loan by year, year 1 0
Term loan by year, year 2 24
Term loan by year, year 3 41
Term loan by year, year 4 35
Term loan by year, year 5 15
Prior 6
Total Term Loans 121
Revolving Loans 4,402
Revolving Loans Converted to Term 118
Total 4,641
Credit Card: | Domestic credit card  
Financing Receivable, Credit Quality Indicator [Line Items]  
Revolving Loans 4,257
Revolving Loans Converted to Term 113
Total 4,370
Credit Card: | Personal loans  
Financing Receivable, Credit Quality Indicator [Line Items]  
Term loan by year, year 1 0
Term loan by year, year 2 24
Term loan by year, year 3 41
Term loan by year, year 4 35
Term loan by year, year 5 15
Prior 6
Total Term Loans 121
Total 121
Credit Card: | International card businesses  
Financing Receivable, Credit Quality Indicator [Line Items]  
Revolving Loans 145
Revolving Loans Converted to Term 5
Total 150
Consumer Banking:  
Financing Receivable, Credit Quality Indicator [Line Items]  
Term loan by year, year 1 3
Term loan by year, year 2 207
Term loan by year, year 3 197
Term loan by year, year 4 125
Term loan by year, year 5 102
Prior 78
Total Term Loans 712
Revolving Loans 23
Revolving Loans Converted to Term 0
Total 735
Consumer Banking: | Auto  
Financing Receivable, Credit Quality Indicator [Line Items]  
Term loan by year, year 1 3
Term loan by year, year 2 207
Term loan by year, year 3 197
Term loan by year, year 4 125
Term loan by year, year 5 102
Prior 77
Total Term Loans 711
Revolving Loans 0
Revolving Loans Converted to Term 0
Total 711
Consumer Banking: | Retail banking  
Financing Receivable, Credit Quality Indicator [Line Items]  
Term loan by year, year 1 0
Term loan by year, year 2 0
Term loan by year, year 3 0
Term loan by year, year 4 0
Term loan by year, year 5 0
Prior 1
Total Term Loans 1
Revolving Loans 23
Revolving Loans Converted to Term 0
Total 24
Commercial Banking:  
Financing Receivable, Credit Quality Indicator [Line Items]  
Term loan by year, year 1 0
Term loan by year, year 2 0
Term loan by year, year 3 0
Term loan by year, year 4 0
Term loan by year, year 5 10
Prior 55
Total Term Loans 65
Revolving Loans 4
Revolving Loans Converted to Term 0
Total 69
Commercial Banking: | Commercial and multifamily real estate  
Financing Receivable, Credit Quality Indicator [Line Items]  
Term loan by year, year 1 0
Term loan by year, year 2 0
Term loan by year, year 3 0
Term loan by year, year 4 0
Term loan by year, year 5 0
Prior 3
Total Term Loans 3
Revolving Loans 0
Revolving Loans Converted to Term 0
Total 3
Commercial Banking: | Commercial and industrial  
Financing Receivable, Credit Quality Indicator [Line Items]  
Term loan by year, year 1 0
Term loan by year, year 2 0
Term loan by year, year 3 0
Term loan by year, year 4 0
Term loan by year, year 5 10
Prior 52
Total Term Loans 62
Revolving Loans 4
Revolving Loans Converted to Term 0
Total $ 66