Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Statement of Cash Flows [Abstract]
Sale of premises and equipment	$ 1	$ 6	$ 2
Increase in short-term borrowings, non-cash			117
Increase in loans and Card Member receivables, including Card Member loans held for sale, non-cash			117
Net income taxes paid	3,195	3,600	3,300
Interest paid	$ 8,000	$ 8,200	$ 6,400