Acquisitions, Goodwill, and Acquired Intangible Assets - Summary of Goodwill Activity by Segment (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012
Goodwill [Line Items]
Goodwill - Beginning Balance	$ 2,552		$ 1,955
New acquisitions	103		587	[1]
Other adjustments	0	[2]	10	[2]
Goodwill - Ending Balance	2,655		2,552
North America
Goodwill [Line Items]
Goodwill - Beginning Balance	1,937		1,533
New acquisitions	99		403	[1]
Other adjustments	(3)	[2]	1	[2]
Goodwill - Ending Balance	2,033		1,937
International
Goodwill [Line Items]
Goodwill - Beginning Balance	615		422
New acquisitions	4		184	[1]
Other adjustments	3	[2]	9	[2]
Goodwill - Ending Balance	$ 622		$ 615

[1] Primarily consists of the goodwill of Kiva.

[2] Primarily consists of changes in foreign exchange.