Income Taxes - Schedule of Net Deferred Tax Liability (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets:
Net operating loss carryforwards	$ 74	$ 9
Deferred income	5	4
Accrued compensation	1	2
Other	6	6
Total gross deferred tax assets	86	21
Less: valuation allowance	(77)	(6)
Deferred tax assets	9	15
Deferred tax liabilities:
Property and equipment	(4)	(48)
Investments	(10)	(8)
Accrued compensation	(4)	(1)
Deferred tax liabilities	(18)	(57)
Net deferred tax liability	$ (9)	$ (42)