Relationship with Marriott International - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Management Fees
Related Party Transaction [Line Items]
Management fees	$ 243.0	$ 239.0	$ 236.0
Agreements with Marriott International Inc
Related Party Transaction [Line Items]
Percentage of management agreements, based on revenues	75.00%
Franchise fees	$ 11.7	9.7	4.6
Agreements with Marriott International Inc \| Management Fees
Related Party Transaction [Line Items]
Management fees	$ 200.0	$ 199.0	$ 159.0

The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.2(a),(d))
-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

Name:	us-gaap_CostOfGoodsAndServicesSold
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration