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Reportable Operating Segments and Geographic Operations - Selected Financial Information (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Segment Reporting Information [Line Items] |  |  |
Total non-interest revenues | $ 50,406 | $ 47,381 | $ 42,967
Revenue from contracts with customers | 38,825 | 37,218 | 34,219
Interest income | 23,795 | 19,983 | 12,658
Interest expense | 8,252 | 6,849 | 2,763
Net interest income | 15,543 | 13,134 | 9,895
Total revenues net of interest expense | 65,949 | 60,515 | 52,862
Provisions | 5,185 | 4,923 | 2,182
Total revenues net of interest expense after provisions for credit losses | 60,764 | 55,592 | 50,680
Card Member rewards, business development and Card Member services | 27,267 | 24,992 | 21,904
Marketing | 6,040 | 5,213 | 5,458
Salaries and employee benefits and other operating expenses | 14,562 | 14,874 | 13,733
Total expenses | 47,869 | 45,079 | 41,095
Pretax income (loss) | 12,895 | 10,513 | 9,585
Total assets | 271,461 | 261,108 | 228,354
Corporate and Other |  |  |
Segment Reporting Information [Line Items] |  |  |
Total non-interest revenues | (48) | (106) | (54)
Revenue from contracts with customers | (32) | (37) | (7)
Interest income | 2,608 | 2,186 | 655
Interest expense | 2,842 | 2,283 | 758
Net interest income | (234) | (97) | (103)
Total revenues net of interest expense | (282) | (203) | (157)
Provisions | (1) | 1 | 5
Total revenues net of interest expense after provisions for credit losses | (281) | (204) | (162)
Card Member rewards, business development and Card Member services | 43 | 46 | (11)
Marketing | 24 | 20 | 27
Salaries and employee benefits and other operating expenses | 2,068 | 2,140 | 2,049
Total expenses | 2,135 | 2,206 | 2,065
Pretax income (loss) | (2,416) | (2,410) | (2,227)
Total assets | 37,673 | 32,641 | 25,603
USCS | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Total non-interest revenues | 20,137 | 18,464 | 16,440
Revenue from contracts with customers | 14,481 | 13,715 | 12,478
Interest income | 14,430 | 12,336 | 8,457
Interest expense | 3,140 | 2,684 | 983
Net interest income | 11,290 | 9,652 | 7,474
Total revenues net of interest expense | 31,427 | 28,116 | 23,914
Provisions | 3,029 | 2,855 | 1,021
Total revenues net of interest expense after provisions for credit losses | 28,398 | 25,261 | 22,893
Card Member rewards, business development and Card Member services | 14,329 | 12,808 | 10,791
Marketing | 3,051 | 2,585 | 2,744
Salaries and employee benefits and other operating expenses | 4,641 | 4,435 | 3,958
Total expenses | 22,021 | 19,828 | 17,493
Pretax income (loss) | 6,377 | 5,433 | 5,400
Total assets | 114,228 | 107,158 | 94,444
CS | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Total non-interest revenues | 13,219 | 12,931 | 12,196
Revenue from contracts with customers | 11,559 | 11,379 | 10,844
Interest income | 4,374 | 3,328 | 2,070
Interest expense | 1,734 | 1,483 | 697
Net interest income | 2,640 | 1,845 | 1,373
Total revenues net of interest expense | 15,859 | 14,776 | 13,569
Provisions | 1,389 | 1,313 | 565
Total revenues net of interest expense after provisions for credit losses | 14,470 | 13,463 | 13,004
Card Member rewards, business development and Card Member services | 6,504 | 6,332 | 6,116
Marketing | 1,319 | 1,090 | 1,122
Salaries and employee benefits and other operating expenses | 3,142 | 3,180 | 2,886
Total expenses | 10,965 | 10,602 | 10,124
Pretax income (loss) | 3,505 | 2,861 | 2,880
Total assets | 58,969 | 55,361 | 51,411
ICS | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Total non-interest revenues | 10,369 | 9,472 | 8,262
Revenue from contracts with customers | 6,766 | 6,155 | 5,301
Interest income | 2,331 | 2,076 | 1,453
Interest expense | 1,239 | 1,118 | 654
Net interest income | 1,092 | 958 | 799
Total revenues net of interest expense | 11,461 | 10,430 | 9,061
Provisions | 726 | 727 | 584
Total revenues net of interest expense after provisions for credit losses | 10,735 | 9,703 | 8,477
Card Member rewards, business development and Card Member services | 5,243 | 4,588 | 3,816
Marketing | 1,235 | 1,081 | 1,146
Salaries and employee benefits and other operating expenses | 3,226 | 3,061 | 2,937
Total expenses | 9,704 | 8,730 | 7,899
Pretax income (loss) | 1,031 | 973 | 578
Total assets | 42,879 | 42,234 | 36,891
GMNS | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Total non-interest revenues | 6,729 | 6,620 | 6,123
Revenue from contracts with customers | 6,051 | 6,006 | 5,603
Interest income | 52 | 57 | 23
Interest expense | (703) | (719) | (329)
Net interest income | 755 | 776 | 352
Total revenues net of interest expense | 7,484 | 7,396 | 6,475
Provisions | 42 | 27 | 7
Total revenues net of interest expense after provisions for credit losses | 7,442 | 7,369 | 6,468
Card Member rewards, business development and Card Member services | 1,148 | 1,218 | 1,192
Marketing | 411 | 437 | 419
Salaries and employee benefits and other operating expenses | 1,485 | 2,058 | 1,903
Total expenses | 3,044 | 3,713 | 3,514
Pretax income (loss) | 4,398 | 3,656 | 2,954
Total assets | $ 17,712 | $ 23,714 | $ 20,005

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