Provision for Income Taxes from Continuing Operations (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Current Federal	$ 79	$ 17
Current State	30	6	$ 1
Current Foreign	37	19	12
Current Income Tax Expense (Benefit), Total	146	42	13
Deferred Federal	2	32	24
Deferred State	1	4	6
Deferred Foreign	1	2	(3)
Deferred income taxes	4	38	27
Income tax provision – continuing operations	$ 150	$ 80	$ 40