Primary Components of Net Deferred Tax Asset (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets
Net operating losses, general business credits, and capital loss carryovers	$ 172	$ 16
Property and equipment	3	3
Deferred revenue and expenses	17	20
Foreign exchange net losses (AOCI)	12	12
Total gross deferred tax assets	204	51
Less: Valuation allowance	(19)	(13)
Total deferred tax assets, net of valuation allowance	185	38
Deferred tax liabilities
Investments in domestic affiliates	(1)	(6)
Total gross deferred tax liabilities	(1)	(6)
Net deferred tax assets	$ 184	$ 32