Segments (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Financial performance of operating segments
Total consolidated net revenue	$ 3,892	[1]	$ 3,404	[1]	$ 11,517	[1]	$ 10,079	[1]
Operating income (loss)	799	[1]	667	[1]	2,349	[1]	2,015	[1]
Marketplaces
Financial performance of operating segments
Net transaction revenues	1,668	[1]	1,490	[1]	4,913	[1]	4,406	[1]
Marketing services and other revenues	359	[1]	316	[1]	1,072	[1]	942	[1]
Revenue by reportable segment	2,027	[1]	1,806	[1]	5,985	[1]	5,348	[1]
Operating income (loss)	789	[1]	705	[1]	2,406	[1]	2,093	[1]
Payments
Financial performance of operating segments
Net transaction revenues	1,493	[1]	1,264	[1]	4,403	[1]	3,715	[1]
Marketing services and other revenues	127	[1]	102	[1]	389	[1]	318	[1]
Revenue by reportable segment	1,620	[1]	1,367	[1]	4,792	[1]	4,033	[1]
Operating income (loss)	368	[1]	309	[1]	1,116	[1]	1,004	[1]
Enterprise
Financial performance of operating segments
Net transaction revenues	185	[1]	170	[1]	565	[1]	516	[1]
Marketing services and other revenues	53	[1]	57	[1]	155	[1]	168	[1]
Revenue by reportable segment	238	[1]	226	[1]	720	[1]	684	[1]
Operating income (loss)	12	[1]	14	[1]	29	[1]	47	[1]
Corporate and other
Financial performance of operating segments
Marketing services and other revenues	14	[1]	11	[1]	40	[1]	27	[1]
Operating income (loss)	(370)	[1]	(361)	[1]	(1,202)	[1]	(1,129)	[1]
Intersegment Eliminations [Member]
Financial performance of operating segments
Revenue by reportable segment	$ 7	[1],[2]	$ 6	[1],[2]	$ 20	[1],[2]	$ 13	[1],[2]

[1] Certain amounts may not add due to rounding.

[2] Represents revenue generated between our reportable segments.