Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Non-interest revenues
Total non-interest revenues		$ 34,630	$ 28,102	$ 34,936
Interest income
Interest on loans		8,850	9,779	11,308
Interest and dividends on investment securities		83	127	188
Deposits with banks and other		100	177	588
Total interest income		9,033	10,083	12,084
Interest expense
Deposits		458	943	1,559
Long-term debt and other		825	1,155	1,905
Total interest expense		1,283	2,098	3,464
Net interest income		7,750	7,985	8,620
Total revenues net of interest expense		42,380	36,087	43,556
Provisions for credit losses
Provisions for credit losses		(1,419)	4,730	3,573
Total revenues net of interest expense after provisions for credit losses		43,799	31,357	39,983
Expenses
Marketing and business development		9,053	6,747	7,125
Card Member rewards		11,007	8,041	10,439
Card Member services		1,993	1,230	2,223
Salaries and employee benefits		6,240	5,718	5,911
Other, net		4,817	5,325	5,856
Total expenses		33,110	27,061	31,554
Pretax income		10,689	4,296	8,429
Income tax provision		2,629	1,161	1,670
Net income		$ 8,060	$ 3,135	$ 6,759
Earnings per Common Share
Basic (in dollars per share)	[1]	$ 10.04	$ 3.77	$ 8.00
Diluted (in dollars per share)	[1]	$ 10.02	$ 3.77	$ 7.99
Average common shares outstanding for earnings per common share:
Basic (in shares)		789	805	828
Diluted (in shares)		790	806	830
Card Member receivables
Provisions for credit losses
Provisions for credit losses		$ (73)	$ 1,015	$ 963
Card Member loans
Provisions for credit losses
Provisions for credit losses		(1,155)	3,453	2,462
Other
Provisions for credit losses
Provisions for credit losses		(191)	262	148
Discount revenue
Non-interest revenues
Total non-interest revenues		25,727	20,401	26,167
Net card fees
Non-interest revenues
Total non-interest revenues		5,195	4,664	4,042
Other fees and commissions
Non-interest revenues
Total non-interest revenues		2,392	2,163	3,297
Other
Non-interest revenues
Total non-interest revenues		$ 1,316	$ 874	$ 1,430

[1] Represents net income less (i) earnings allocated to participating share awards of $56 million, $20 million and $47 million for the years ended December 31, 2021, 2020 and 2019, respectively, (ii) dividends on preferred shares of $71 million, $79 million and $81 million for the years ended December 31, 2021, 2020 and 2019, respectively, and (iii) equity-related adjustments of $16 million related to the redemption of preferred shares for the year ended December 31, 2021.