Commitments and Contingencies - Additional Information (Detail) - Litigation relating to occupancy tax $ in Millions	9 Months Ended
	Sep. 30, 2020 USD ($) numberOfLawsuit	Dec. 31, 2019 USD ($)
Commitment And Contingencies [Line Items]
Number of lawsuits filed	101
Number of lawsuits currently active	9
Number of lawsuits dismissed to date	48
Number of dismissals based on finding that defendant was not subject to local hotel occupancy tax or the local government lacked standing to pursue claims	34
Reserve for legal contingencies | $	$ 58	$ 48