Segments (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Financial performance of operating segments
Total consolidated net revenue	$ 4,262		$ 3,748
Operating income (loss)	878		800
Marketplaces
Financial performance of operating segments
Net transaction revenues	1,727		1,554
Marketing services and other revenues	428		403
Revenue by reportable segment	2,155		1,957
Operating income (loss)	856		823
Payments
Financial performance of operating segments
Net transaction revenues	1,700		1,435
Marketing services and other revenues	145		113
Revenue by reportable segment	1,845		1,548
Operating income (loss)	475		374
Enterprise
Financial performance of operating segments
Net transaction revenues	208		186
Marketing services and other revenues	61		62
Revenue by reportable segment	269		248
Operating income (loss)	13		(1)
Corporate and other
Financial performance of operating segments
Operating income (loss)	(466)		(396)
Intersegment Eliminations [Member]
Financial performance of operating segments
Revenue by reportable segment	$ 7	[1]	$ 5	[1]

[1] Represents revenue generated between our reportable segments.