Restructuring And Other Charges (Activity And Reserve Balances For Restructuring Charges) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended			12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012		Jun. 30, 2011	Dec. 31, 2011
Restructuring Cost and Reserve [Line Items]
Restructuring reserve beginning balance			$ 134		$ 116	$ 116
Cash payments			(26)			(54)
Restructuring charges	15	34	25		40	130
Other			(7)	[1]		(58)	[1]
Restructuring reserve ending balance	120		120			134
Layoff Costs
Restructuring Cost and Reserve [Line Items]
Restructuring reserve beginning balance			77		53	53
Cash payments			(20)			(45)
Restructuring charges	6	8	17		13	93
Other			(6)	[1]		(24)	[1]
Restructuring reserve ending balance	68		68			77
Other Exit Costs
Restructuring Cost and Reserve [Line Items]
Restructuring reserve beginning balance			57		63	63
Cash payments			(6)			(9)
Restructuring charges			2			37
Other			(1)	[1]		(34)	[1]
Restructuring reserve ending balance	$ 52		$ 52			$ 57

[1] Other includes reversals of previously recorded restructuring charges and the effects of foreign currency translation.