Restructuring and Other Charges, Net - Activity and Reserve Balances for Restructuring Charges (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring reserve beginning balance	$ 47	$ 45	$ 66
Restructuring charges, net	212	111	65
Cash payments	(118)	(102)	(73)
Reversals and other	(4)	(7)	(13)
Restructuring reserve ending balance	137	47	45
Severance and Employee Termination Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve beginning balance	5	11	38
Restructuring charges, net	51	2	15
Cash payments	(19)	(7)	(30)
Reversals and other	(2)	(1)	(12)
Restructuring reserve ending balance	35	5	11
Other Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve beginning balance	42	34	28
Restructuring charges, net	161	109	50
Cash payments	(99)	(95)	(43)
Reversals and other	(2)	(6)	(1)
Restructuring reserve ending balance	$ 102	$ 42	$ 34