Relationship with Marriott International - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Liabilities For Guarantees On Long Duration Contracts [Line Items]
Management fees	$ 236.0	$ 226.0	$ 227.0
Agreements with Marriott International Inc
Liabilities For Guarantees On Long Duration Contracts [Line Items]
Percentage of revenues	77.00%
Management fees	$ 159.0	138.0	142.0
Franchise fees	$ 4.6	$ 2.6	$ 1.4