Provision for Income Taxes from Continuing Operations (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Current Federal	$ 14	$ 79	$ 17
Current State	6	30	6
Current Foreign	3	37	19
Current Income Tax Expense (Benefit), Total	23	146	42
Deferred Federal	3	2	32
Deferred State	1	1	4
Deferred Foreign	3	1	2
Deferred income taxes	7	4	38
Income tax provision – continuing operations	$ 30	$ 150	$ 80