Property and Equipment - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Depreciation	$ 60	$ 66	$ 182	$ 205
Casualty (gain) loss and impairment loss, net	8	$ (1)	8	(1)
Hurricanes Irma and Maria [Member]
Property, Plant and Equipment [Line Items]
Insurance receivable for property damage			12
Reimbursements expense			3	6
Insurance recovery amount recognized on hurricanes damage			23
Casualty (gain) loss and impairment loss, net			7
Expenses on property and equipment from hurricane damage				32
Loss on property and equipment from hurricane damage				22
Additional insurance receivable recognized for property and equipment damaged from hurricanes				54
Insurance proceeds received on hurricanes damage				108
Hurricanes Irma and Maria [Member] | Other Assets [Member]
Property, Plant and Equipment [Line Items]
Insurance settlements receivable on hurricanes damage	$ 5		5		$ 25
Hurricanes Irma and Maria [Member] | Ancillary Hotel [Member]
Property, Plant and Equipment [Line Items]
Business interruption insurance recovery			$ 8	$ 15