Income Taxes - Schedule of Net Deferred Tax Liability (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Net operating loss carryforwards	$ 51	$ 74
Deferred income	5	5
Accrued compensation	2	1
Other	7	6
Total gross deferred tax assets	65	86
Less: valuation allowance	(55)	(77)
Deferred tax assets	10	9
Deferred tax liabilities:
Property and equipment	(4)	(4)
Investments	(9)	(10)
Accrued compensation	(5)	(4)
Deferred tax liabilities	(18)	(18)
Net deferred tax liability	$ (8)	$ (9)