Summary of Goodwill Activity by Segment (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011
Goodwill [Line Items]
Goodwill - Beginning Balance	$ 1,955		$ 1,349
New acquisitions	567	[1]	553
Other adjustments	(1)	[2]	7	[2]
Goodwill - Ending Balance	2,521		1,909
North America
Goodwill [Line Items]
Goodwill - Beginning Balance	1,533		1,116
New acquisitions	378	[1]	388
Other adjustments	(1)	[2]	3	[2]
Goodwill - Ending Balance	1,910		1,507
International
Goodwill [Line Items]
Goodwill - Beginning Balance	422		233
New acquisitions	189	[1]	165
Other adjustments			4	[2]
Goodwill - Ending Balance	$ 611		$ 402

[1] Primarily includes the goodwill of Kiva Systems, Inc.

[2] Primarily includes changes in foreign exchange.