v3.26.1
Business Segments and Revenue from Contracts with Customers - Revenue from Contracts with Customers (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Disaggregation of Revenue [Line Items]    
Total contract revenue $ 2,410 $ 1,489
Revenue (reduction) from other sources 676 498
Total non-interest income 3,086 1,987
Operating segments | Credit Card    
Disaggregation of Revenue [Line Items]    
Total contract revenue 1,627 1,196
Revenue (reduction) from other sources 526 315
Total non-interest income 2,153 1,511
Operating segments | Consumer Banking    
Disaggregation of Revenue [Line Items]    
Total contract revenue 682 184
Revenue (reduction) from other sources 1 (1)
Total non-interest income 683 183
Operating segments | Commercial Banking    
Disaggregation of Revenue [Line Items]    
Total contract revenue 98 109
Revenue (reduction) from other sources 230 203
Total non-interest income 328 312
Other    
Disaggregation of Revenue [Line Items]    
Total contract revenue 3 0
Revenue (reduction) from other sources (81) (19)
Total non-interest income (78) (19)
Interchange fees, net    
Disaggregation of Revenue [Line Items]    
Total contract revenue 1,964 1,223
Interchange fees, net | Operating segments | Credit Card    
Disaggregation of Revenue [Line Items]    
Total contract revenue 1,469 1,085
Interchange fees, net | Operating segments | Consumer Banking    
Disaggregation of Revenue [Line Items]    
Total contract revenue 475 115
Interchange fees, net | Operating segments | Commercial Banking    
Disaggregation of Revenue [Line Items]    
Total contract revenue 20 23
Interchange fees, net | Other    
Disaggregation of Revenue [Line Items]    
Total contract revenue 0 0
Service charges and other customer-related fees    
Disaggregation of Revenue [Line Items]    
Total contract revenue 249 105
Service charges and other customer-related fees | Operating segments | Credit Card    
Disaggregation of Revenue [Line Items]    
Total contract revenue 22 0
Service charges and other customer-related fees | Operating segments | Consumer Banking    
Disaggregation of Revenue [Line Items]    
Total contract revenue 149 20
Service charges and other customer-related fees | Operating segments | Commercial Banking    
Disaggregation of Revenue [Line Items]    
Total contract revenue 76 85
Service charges and other customer-related fees | Other    
Disaggregation of Revenue [Line Items]    
Total contract revenue 2 0
Other    
Disaggregation of Revenue [Line Items]    
Total contract revenue 197 161
Other | Operating segments | Credit Card    
Disaggregation of Revenue [Line Items]    
Total contract revenue 136 111
Other | Operating segments | Consumer Banking    
Disaggregation of Revenue [Line Items]    
Total contract revenue 58 49
Other | Operating segments | Commercial Banking    
Disaggregation of Revenue [Line Items]    
Total contract revenue 2 1
Other | Other    
Disaggregation of Revenue [Line Items]    
Total contract revenue $ 1 $ 0