v3.26.1
Business Segments and Revenue from Contracts with Customers - Segment Results and Reconciliation (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Segment Reporting Information [Line Items]      
Net interest income $ 12,145 $ 8,013  
Non-interest income (loss) 3,086 1,987  
Total net revenue (loss) 15,231 10,000  
Provision for credit losses 4,068 2,369  
Non-interest expense 8,464 5,902  
Income (loss) from continuing operations before income taxes 2,699 1,729  
Income tax provision (benefit) 518 325  
Income (loss) from continuing operations, net of tax 2,181 1,404  
Loans held for investment 447,754 323,598  
Deposits 489,053 367,464 $ 475,771
Uncollectible portion of billed finance charges and fees 980 705  
Operating segments | Credit Card      
Segment Reporting Information [Line Items]      
Net interest income 9,236 5,654  
Non-interest income (loss) 2,153 1,511  
Total net revenue (loss) 11,389 7,165  
Provision for credit losses 3,411 1,926  
Non-interest expense 5,501 3,638  
Income (loss) from continuing operations before income taxes 2,477 1,601  
Income tax provision (benefit) 608 382  
Income (loss) from continuing operations, net of tax 1,869 1,219  
Loans held for investment 270,558 157,189  
Deposits 0 0  
Operating segments | Consumer Banking      
Segment Reporting Information [Line Items]      
Net interest income 2,229 1,943  
Non-interest income (loss) 683 183  
Total net revenue (loss) 2,912 2,126  
Provision for credit losses 519 301  
Non-interest expense 1,998 1,581  
Income (loss) from continuing operations before income taxes 395 244  
Income tax provision (benefit) 97 58  
Income (loss) from continuing operations, net of tax 298 186  
Loans held for investment 86,873 78,896  
Deposits 438,034 324,920  
Operating segments | Commercial Banking      
Segment Reporting Information [Line Items]      
Net interest income 581 572  
Non-interest income (loss) 328 312  
Total net revenue (loss) 909 884  
Provision for credit losses 138 142  
Non-interest expense 498 486  
Income (loss) from continuing operations before income taxes 273 256  
Income tax provision (benefit) 67 61  
Income (loss) from continuing operations, net of tax 206 195  
Loans held for investment 90,323 87,513  
Deposits 31,007 29,984  
Other      
Segment Reporting Information [Line Items]      
Net interest income 99 (156)  
Non-interest income (loss) (78) (19)  
Total net revenue (loss) 21 (175)  
Provision for credit losses 0 0  
Non-interest expense 467 197  
Income (loss) from continuing operations before income taxes (446) (372)  
Income tax provision (benefit) (254) (176)  
Income (loss) from continuing operations, net of tax (192) (196)  
Loans held for investment 0 0  
Deposits $ 20,012 $ 12,560