Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Non-interest revenues
Total non-interest revenues		$ 50,406	$ 47,381	$ 42,967
Interest income
Interest on loans		21,095	17,697	11,967
Interest and dividends on investment securities		86	128	96
Deposits with banks and other		2,614	2,158	595
Total interest income		23,795	19,983	12,658
Interest expense
Deposits		5,695	4,865	1,527
Long-term debt and other		2,557	1,984	1,236
Total 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 for credit losses
Provisions for credit losses		5,185	4,923	2,182
Total revenues net of interest expense after provisions for credit losses		60,764	55,592	50,680
Expenses
Card Member rewards		16,599	15,367	14,002
Business development		5,886	5,657	4,943
Card Member services		4,782	3,968	2,959
Marketing		6,040	5,213	5,458
Salaries and employee benefits		8,198	8,067	7,252
Other, net		6,364	6,807	6,481
Total expenses		47,869	45,079	41,095
Pretax income		12,895	10,513	9,585
Income tax provision		2,766	2,139	2,071
Net income		$ 10,129	$ 8,374	$ 7,514
Earnings per Common Share
Basic (in dollars per share)	[1]	$ 14.04	$ 11.23	$ 9.86
Diluted (in dollars per share)	[1]	$ 14.01	$ 11.21	$ 9.85
Average common shares outstanding for earnings per common share:
Basic (in shares)		712	735	751
Diluted (in shares)		713	736	752
Card Member receivables
Provisions for credit losses
Provisions for credit losses		$ 774	$ 880	$ 627
Card Member loans
Provisions for credit losses
Provisions for credit losses		4,109	3,839	1,514
Other
Provisions for credit losses
Provisions for credit losses		302	204	41
Discount revenue
Non-interest revenues
Total non-interest revenues		35,192	33,416	30,739
Net card fees
Non-interest revenues
Total non-interest revenues		8,449	7,255	6,070
Service fees and other revenue
Non-interest revenues
Total non-interest revenues		5,129	5,005	4,521
Processed revenue
Non-interest revenues
Total non-interest revenues		$ 1,636	$ 1,705	$ 1,637

[1] Represents net income less (i) earnings allocated to participating share awards of $76 million, $64 million and $57 million for the years ended December 31, 2024, 2023 and 2022, respectively, and (ii) dividends on preferred shares of $58 million, $58 million and $57 million for the years ended December 31, 2024, 2023 and 2022, respectively.