Consolidated Variable Interest Entities and Investments in Affiliates - Schedule of Assets and Liabilities Included in Consolidated Balance Sheets (Detail) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Variable Interest Entity [Line Items]
Property and equipment, net	$ 7,974	$ 8,311	[1]
Cash and cash equivalents	399	364
Restricted cash	16	15
Accounts receivable, net	176	125
Prepaid expenses	62	48
Debt	2,948	2,961
Accounts payable and accrued expenses	198	215
Due to hotel manager	116	141
Other liabilities	198	232
Consolidated VIEs [Member]
Variable Interest Entity [Line Items]
Property and equipment, net	222	215
Cash and cash equivalents	16	14
Restricted cash	1	7
Accounts receivable, net	6	2
Prepaid expenses	1	2
Debt	207	207
Accounts payable and accrued expenses	8	8
Due to hotel manager		1
Other liabilities	$ 1	$ 1

[1] Excludes $31 million of property and equipment, net classified as held for sale as of December 31, 2017.