Income Taxes - Schedule of Provision for Income Taxes on Income from Continuing Operations (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
Federal	$ (4)	$ 5	$ 3
Foreign	404	757	421
Current provision for income taxes, total	400	762	424
Deferred:
Federal	2	(21)	25
Foreign	13	(9)	143
Deferred provision for income taxes, total	15	(30)	168
Provision for income taxes	$ 415	$ 732	$ 592