Income (Loss) from Continuing Operations Before Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
U.S. income (loss)	$ (945)	$ 949	$ 887
Foreign income (loss)	(16)	13	414
INCOME (LOSS) BEFORE INCOME TAXES	$ (961)	$ 962	$ 1,301