Income from Continuing Operations Before Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
U.S. income	$ 887	$ 593	$ 763
Foreign income	414	58	48
INCOME BEFORE INCOME TAXES	$ 1,301	$ 651	$ 811