Consolidated Statements of Income (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Non-interest revenues
Discount revenue	$ 4,646	$ 4,438
Net card fees	674	653
Travel commissions and fees	423	437
Other commissions and fees	618	573
Other	501	537
Total non-interest revenues	6,862	6,638
Interest income
Interest on loans	1,711	1,683
Interest and dividends on investment securities	46	53
Deposits with banks and other	19	26
Total interest income	1,776	1,762
Interest expense
Deposits	94	114
Long-term debt and other	345	405
Total interest expense	439	519
Net interest income	1,337	1,243
Total revenues net of interest expense	8,199	7,881
Provisions for losses
Charge card	215	154
Card Member loans	250	243
Other	20	19
Total provisions for losses	485	416
Total revenues net of interest expense after provisions for losses	7,714	7,465
Expenses
Marketing, promotion, rewards and Card Member services	2,417	2,330
Salaries and employee benefits	1,540	1,615
Other, net	1,549	1,611
Total expenses	5,506	5,556
Pretax income	2,208	1,909
Income tax provision	776	629
Net income	$ 1,432	$ 1,280
Earnings Per Common Share, Basic [Abstract]
Income from continuing operations attributable to common shareholders	$ 1.34	$ 1.15
Earnings Per Common Share, Diluted [Abstract]
Income from continuing operations attributable to common shareholders	$ 1.33	$ 1.15
Average common shares outstanding for earnings per common share:
Basic	1,060	1,099
Diluted	1,067	1,106
Cash dividends declared per common share	$ 0.23	$ 0.20