Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Non-interest revenues
Other		$ 1,430	$ 1,360	$ 1,457
Total non-interest revenues		34,936	32,675	30,427
Interest income
Interest on loans		11,308	9,941	8,148
Interest and dividends on investment securities		188	118	89
Deposits with banks and other		588	547	326
Total interest income		12,084	10,606	8,563
Interest expense
Deposits		1,559	1,287	779
Long-term debt and other		1,905	1,656	1,333
Total interest expense		3,464	2,943	2,112
Net interest income		8,620	7,663	6,451
Total revenues net of interest expense		43,556	40,338	36,878
Provisions for losses
Charge Card		963	937	795
Card member loans		2,462	2,266	1,868
Other		148	149	97
Total provisions for losses		3,573	3,352	2,760
Total revenues net of interest expense after provisions for losses		39,983	36,986	34,118
Expenses
Marketing and business development		7,114	6,470	5,722
Card Member rewards		10,439	9,696	8,687
Card Member services		2,222	1,777	1,392
Salaries and employee benefits		5,911	5,250	5,258
Other,net		5,868	5,671	5,634
Total Expenses		31,554	28,864	26,693
Pretax income		8,429	8,122	7,425
Income tax provision		1,670	1,201	4,677
Net income		$ 6,759	$ 6,921	$ 2,748
Earnings per Common Share
Basic (in dollars per share)	[1]	$ 8.00	$ 7.93	$ 3.00
Diluted (in dollars per share)	[1]	$ 7.99	$ 7.91	$ 2.99
Average common shares outstanding for earnings per common share:
Basic		828	856	883
Diluted		830	859	886
Discount Revenue [Member]
Non-interest revenues
Revenues and Fees		$ 26,167	$ 24,721	$ 22,890
Net Card Fees [Member]
Non-interest revenues
Revenues and Fees		4,042	3,441	3,090
Other Fees and Commissions [Member]
Non-interest revenues
Revenues and Fees		$ 3,297	$ 3,153	$ 2,990

[1] Represents net income less (i) earnings allocated to participating share awards of $47 million, $54 million and $21 million for the years ended December 31, 2019, 2018 and 2017, respectively, and (ii) dividends on preferred shares of $81 million, $80 million and $81 million for the years ended December 31, 2019, 2018 and 2017, respectively.