Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014		Sep. 30, 2015		Sep. 30, 2014
Non-interest revenues
Discount revenue	$ 4,778	$ 4,889	[1]	$ 14,384		$ 14,428
Net card fees	679	680		2,013		2,041
Travel commissions and fees	87	104		271		1,027
Other commissions and fees	640	642		1,891		1,884
Other	504	593		1,493		1,679
Total non-interest revenues	6,688	6,908		20,052		21,059
Interest income
Interest on loans	1,847	1,753		5,418		5,160
Interest and dividends on investment securities	38	45		120		136
Deposits with banks and other	19	17		60		54
Total interest income	1,904	1,815		5,598		5,350
Interest expense
Deposits	125	91		337		276
Long-term debt and other	274	329		886		1,026
Total interest expense	399	420		1,223		1,302
Net interest income	1,505	1,395		4,375		4,048
Total revenues net of interest expense	8,193	8,303		24,427		25,107
Provisions for losses
Charge card	203	196		542		594
Card Member loans	309	265		829		797
Other	17	27		45		71
Total provisions for losses	529	488		1,416		1,462
Total revenues net of interest expense after provisions for losses	7,664	7,815		23,011		23,645
Expenses
Marketing and promotion	847	783		2,217		2,329
Card Member rewards	1,763	1,695		5,202		5,050
Card Member services and other	269	205		772		619
Salaries and employee benefits	1,212	1,290		3,767		4,488
Other, net	1,635	1,596		4,569		4,393
Total expenses	5,726	5,569		16,527		16,879
Pretax income	1,938	2,246		6,484		6,766
Income tax provision	672	769		2,220		2,328
Net income	$ 1,266	$ 1,477		$ 4,264		$ 4,438
Earnings Per Common Share, Basic [Abstract]
Income from continuing operations attributable to common shareholders	$ 1.24	$ 1.41		$ 4.16		$ 4.19
Earnings Per Common Share, Diluted [Abstract]
Income from continuing operations attributable to common shareholders	$ 1.24	$ 1.4		$ 4.15		$ 4.17
Average common shares outstanding for earnings per common share:
Basic	994	1,041		1,007		1,051
Diluted	997	1,047		1,011		1,057
Cash dividends declared per common share	$ 0.29	$ 0.26		$ 0.84	[2]	$ 0.75	[2]

[1] Represents net income less ( i ) earnings allocated to participating share awards of $ 10 million and $ 11 million for the three months ended September 30 , 2015 and 2014 , respect ively, and (ii) dividends on preferred shares of $ 22 million and nil for the three months ended September 30 , 2015 and 2014 , respectively.

[2] Represents net income less ( i ) earnings allocate d to participating share awards of $ 32 million and $ 35 million for the nine months ended September 30 , 2015 and 2014 , respectively, and (ii) di vidends on preferred shares of $ 42 million and nil for the nine months ended September 30 , 2015 and 2014 , respectively.