Restructuring and Other Charges - Schedule of Restructuring and Other Charges (Detail) - USD ($)		12 Months Ended
	Nov. 01, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Restructuring and Related Activities [Abstract]
Asset impairments	$ 0	$ 58,000,000	$ 80,000,000	$ 0
Layoff costs		64,000,000	70,000,000	97,000,000
Net loss on divestitures of businesses (F)		57,000,000	3,000,000	136,000,000
Other		(3,000,000)	27,000,000	(11,000,000)
Reversals of previously recorded layoff costs		(11,000,000)	(25,000,000)	(8,000,000)
Restructuring and other charges		$ 165,000,000	$ 155,000,000	$ 214,000,000