Restructuring and Other Charges - Activity and Reserve Balances for Restructuring Charges (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Restructuring Cost and Reserve [Line Items]
Restructuring reserve beginning balance	$ 111	$ 134	$ 116
Cash payments	(74)	(57)	(54)
Restructuring charges	286	60	130
Other	(185)	(26)	(58)
Restructuring reserve ending balance	138	111	134
Layoff Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve beginning balance	59	77	53
Cash payments	(63)	(44)	(45)
Restructuring charges	201	47	93
Other	(101)	(21)	(24)
Restructuring reserve ending balance	96	59	77
Other Exit Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve beginning balance	52	57	63
Cash payments	(11)	(13)	(9)
Restructuring charges	85	13	37
Other	(84)	(5)	(34)
Restructuring reserve ending balance	$ 42	$ 52	$ 57