Reportable Operating Segments and Geographic Operations (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Segment Reporting Information [Line Items]
Non-interest revenues	$ 6,786	$ 6,861	$ 13,294	$ 13,364
Interest income	1,885	1,837	3,890	3,694
Interest expense	436	414	861	824
Total revenues, net of interest expense	8,235	8,284	16,323	16,234
Net income	2,015	1,473	3,441	2,998
Total assets	159,642	157,000	159,642	157,000	$ 161,184
Total equity	20,712	22,000	20,712	22,000	$ 20,673
U S Consumer Services [Member]
Segment Reporting Information [Line Items]
Non-interest revenues	2,069	2,176	4,098	4,207
Interest income	1,278	1,252	2,669	2,525
Interest expense	139	121	279	235
Total revenues, net of interest expense	3,208	3,307	6,488	6,497
Net income	1,067	613	1,761	1,272
Total assets	81,000	84,000	81,000	84,000
Total equity	7,000	8,000	7,000	8,000
International Consumer and Network Services [Member]
Segment Reporting Information [Line Items]
Non-interest revenues	1,242	1,163	2,382	2,308
Interest income	234	237	461	482
Interest expense	58	58	112	121
Total revenues, net of interest expense	1,418	1,342	2,731	2,669
Net income	228	193	416	390
Total assets	35,000	29,000	35,000	29,000
Total equity	3,000	3,000	3,000	3,000
Global Commercial Services [Member]
Segment Reporting Information [Line Items]
Non-interest revenues	2,280	2,285	4,470	4,460
Interest income	310	289	631	567
Interest expense	104	91	199	180
Total revenues, net of interest expense	2,486	2,483	4,902	4,847
Net income	576	550	1,061	1,067
Total assets	46,000	46,000	46,000	46,000
Total equity	8,000	7,000	8,000	7,000
Global Merchant Services [Member]
Segment Reporting Information [Line Items]
Non-interest revenues	1,087	1,130	2,128	2,200
Interest income	1	1	1	1
Interest expense	(61)	(49)	(120)	(108)
Total revenues, net of interest expense	1,149	1,180	2,249	2,309
Net income	373	369	730	738
Total assets	24,000	17,000	24,000	17,000
Total equity	2,000	2,000	2,000	2,000
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Non-interest revenues	108	107	216	189
Interest income	62	58	128	119
Interest expense	196	193	391	396
Total revenues, net of interest expense	(26)	(28)	(47)	(88)
Net income	(229)	(252)	(527)	(469)
Total assets	(26,000)	(19,000)	(26,000)	(19,000)
Total equity	$ 1,000	$ 2,000	$ 1,000	$ 2,000