Revenue - Schedule of Revenue Components (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue [Line Items]
Total revenues	$ 107	$ 215	$ 325	$ 642
Rooms
Revenue [Line Items]
Total revenues	105	210	318	629
Other
Revenue [Line Items]
Total revenues	1	2	3	5
Total lease revenues
Revenue [Line Items]
Total revenues	106	212	321	634
Customer revenues
Revenue [Line Items]
Total revenues	$ 1	$ 3	$ 4	$ 8