Segments (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Segment Reporting Information [Line Items]
Net revenues	$ 4,530	$ 3,892	$ 3,877	$ 3,748	$ 3,992	$ 3,404	$ 3,398	$ 3,277	$ 16,047		$ 14,072		$ 11,652
Income from operations									3,371		2,888		2,373
Net revenues from external customers									16,047		14,072		11,652
Long-Lived Assets	2,996				2,949				2,996		2,949
Marketplaces [Member]
Segment Reporting Information [Line Items]
Net transaction revenues									6,795		6,078		5,431
Marketing services and other revenues									1,489		1,320		1,211
Net revenues									8,284		7,398		6,642
Income from operations									3,351		2,943		2,631
Payments [Member]
Segment Reporting Information [Line Items]
Net transaction revenues									6,096		5,146		4,123
Marketing services and other revenues									532		428		289
Net revenues									6,628		5,574		4,412
Income from operations									1,588		1,359		978
Enterprise [Member]
Segment Reporting Information [Line Items]
Net transaction revenues									898		850		460
Marketing services and other revenues									214		233		130
Net revenues									1,112		1,083		590
Income from operations									91		128		83
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Marketing services and other revenues									55		39		8
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Income from operations									(1,659)		(1,542)		(1,319)
U.S. [Member]
Segment Reporting Information [Line Items]
Net revenues from external customers									7,712		6,778		5,484
Long-Lived Assets	2,756				2,727				2,756		2,727
Germany [Member]
Segment Reporting Information [Line Items]
Net revenues from external customers									1,930		1,679		1,539
UNITED KINGDOM
Segment Reporting Information [Line Items]
Net revenues from external customers									2,183		1,889		1,572
Rest of World [Member]
Segment Reporting Information [Line Items]
Net revenues from external customers									4,222		3,726		3,057
INTERNATIONAL [Member]
Segment Reporting Information [Line Items]
Long-Lived Assets	240				222				240		222
Intersegment Elimination [Member]
Segment Reporting Information [Line Items]
Net revenues									$ 32	[1]	$ 22	[1]	$ 0	[1]

[1] Represents revenue generated between our reportable segments.