v3.26.1
Allowance for Credit Losses and Reserve for Unfunded Lending Commitments - Charge-Offs (Details)
$ in Millions
 6 Months Ended
Jun. 30, 2026
USD ($)
Financing Receivable, Credit Quality Indicator [Line Items]  
Term loan by year, year 1 $ 29
Term loan by year, year 2 502
Term loan by year, year 3 452
Term loan by year, year 4 295
Term loan by year, year 5 263
Prior 241
Total Term Loans 1,782
Revolving Loans 8,720
Revolving Loans Converted to Term 226
Total 10,728
Credit Card:  
Financing Receivable, Credit Quality Indicator [Line Items]  
Term loan by year, year 1 0
Term loan by year, year 2 55
Term loan by year, year 3 81
Term loan by year, year 4 63
Term loan by year, year 5 27
Prior 11
Total Term Loans 237
Revolving Loans 8,636
Revolving Loans Converted to Term 226
Total 9,099
Credit Card: | Domestic credit card  
Financing Receivable, Credit Quality Indicator [Line Items]  
Revolving Loans 8,331
Revolving Loans Converted to Term 221
Total 8,552
Credit Card: | Personal loans  
Financing Receivable, Credit Quality Indicator [Line Items]  
Term loan by year, year 1 0
Term loan by year, year 2 55
Term loan by year, year 3 81
Term loan by year, year 4 63
Term loan by year, year 5 27
Prior 11
Total Term Loans 237
Total 237
Credit Card: | International card businesses  
Financing Receivable, Credit Quality Indicator [Line Items]  
Revolving Loans 305
Revolving Loans Converted to Term 5
Total 310
Consumer Banking:  
Financing Receivable, Credit Quality Indicator [Line Items]  
Term loan by year, year 1 29
Term loan by year, year 2 447
Term loan by year, year 3 371
Term loan by year, year 4 232
Term loan by year, year 5 183
Prior 134
Total Term Loans 1,396
Revolving Loans 41
Revolving Loans Converted to Term 0
Total 1,437
Consumer Banking: | Auto  
Financing Receivable, Credit Quality Indicator [Line Items]  
Term loan by year, year 1 29
Term loan by year, year 2 447
Term loan by year, year 3 370
Term loan by year, year 4 232
Term loan by year, year 5 183
Prior 133
Total Term Loans 1,394
Revolving Loans 0
Revolving Loans Converted to Term 0
Total 1,394
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 1
Term loan by year, year 4 0
Term loan by year, year 5 0
Prior 1
Total Term Loans 2
Revolving Loans 41
Revolving Loans Converted to Term 0
Total 43
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 53
Prior 96
Total Term Loans 149
Revolving Loans 43
Revolving Loans Converted to Term 0
Total 192
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 11
Total Term Loans 11
Revolving Loans 0
Revolving Loans Converted to Term 0
Total 11
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 53
Prior 85
Total Term Loans 138
Revolving Loans 43
Revolving Loans Converted to Term 0
Total $ 181