Other Liabilities - Summary (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Summary of other liabilities
Membership Rewards liability	$ 16,520	$ 14,752
Deferred card and other fees, net	4,655	4,042
Book overdraft balances	4,054	3,461
Employee-related liabilities	3,091	2,676
Card Member rebate and reward accruals	2,247	2,121
Income tax liability	1,401	1,386
Other	9,664	8,373
Total	$ 41,632	$ 36,811