v3.26.1
Business Segments and Revenue from Contracts with Customers - Segment Results and Reconciliation (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Segment Reporting [Line Items]          
Net interest income $ 12,374 $ 9,995 $ 24,519 $ 18,008  
Non-interest income (loss) 3,476 2,497 6,562 4,484  
Total net revenue (loss) 15,850 12,492 31,081 22,492  
Provision for credit losses 2,989 11,430 7,057 13,799  
Non-interest expense 9,043 6,991 17,507 12,893  
Income (loss) from continuing operations before income taxes 3,818 (5,929) 6,517 (4,200)  
Income tax provision (benefit) 798 (1,666) 1,316 (1,341)  
Income (loss) from continuing operations, net of tax 3,020 (4,263) 5,201 (2,859)  
Loans held for investment 457,168 439,297 457,168 439,297  
Deposits 484,257 468,110 484,257 468,110 $ 475,771
Uncollectible portion of billed finance charges and fees 898 785 1,900 1,500  
Operating segments | Credit Card          
Segment Reporting [Line Items]          
Net interest income 9,252 7,293 18,488 12,947  
Non-interest income (loss) 2,513 1,802 4,666 3,313  
Total net revenue (loss) 11,765 9,095 23,154 16,260  
Provision for credit losses 2,474 11,098 5,885 13,024  
Non-interest expense 6,098 4,447 11,599 8,085  
Income (loss) from continuing operations before income taxes 3,193 (6,450) 5,670 (4,849)  
Income tax provision (benefit) 782 (1,533) 1,390 (1,151)  
Income (loss) from continuing operations, net of tax 2,411 (4,917) 4,280 (3,698)  
Loans held for investment 275,408 269,709 275,408 269,709  
Deposits 0 0 0 0  
Operating segments | Consumer Banking          
Segment Reporting [Line Items]          
Net interest income 2,431 2,162 4,660 4,105  
Non-interest income (loss) 778 394 1,461 577  
Total net revenue (loss) 3,209 2,556 6,121 4,682  
Provision for credit losses 444 252 963 553  
Non-interest expense 2,121 1,713 4,119 3,294  
Income (loss) from continuing operations before income taxes 644 591 1,039 835  
Income tax provision (benefit) 158 141 255 199  
Income (loss) from continuing operations, net of tax 486 450 784 636  
Loans held for investment 90,467 81,233 90,467 81,233  
Deposits 435,221 414,044 435,221 414,044  
Operating segments | Commercial Banking          
Segment Reporting [Line Items]          
Net interest income 585 602 1,166 1,174  
Non-interest income (loss) 265 335 593 647  
Total net revenue (loss) 850 937 1,759 1,821  
Provision for credit losses 71 81 209 223  
Non-interest expense 462 489 960 975  
Income (loss) from continuing operations before income taxes 317 367 590 623  
Income tax provision (benefit) 78 87 145 148  
Income (loss) from continuing operations, net of tax 239 280 445 475  
Loans held for investment 91,293 88,355 91,293 88,355  
Deposits 30,841 29,245 30,841 29,245  
Other          
Segment Reporting [Line Items]          
Net interest income 106 (62) 205 (218)  
Non-interest income (loss) (80) (34) (158) (53)  
Total net revenue (loss) 26 (96) 47 (271)  
Provision for credit losses 0 (1) 0 (1)  
Non-interest expense 362 342 829 539  
Income (loss) from continuing operations before income taxes (336) (437) (782) (809)  
Income tax provision (benefit) (220) (361) (474) (537)  
Income (loss) from continuing operations, net of tax (116) (76) (308) (272)  
Loans held for investment 0 0 0 0  
Deposits $ 18,195 $ 24,821 $ 18,195 $ 24,821