Income Taxes - Income Tax Expense (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current
Federal	$ (3)	$ (10)	$ 132
State and local	0	6	2
Foreign	13	19	25
Deferred
Federal	(10)	(20)	(22)
State and local	(1)	(4)	(4)
Foreign	8	6	(8)
Total income tax expense (benefit)	$ 7	$ (3)	$ 125
Effective income tax rate	(53.80%)	(11.10%)	215.50%