Consolidated Variable Interest Entities ("VIEs") and Investments in Affiliates - Schedule of Assets and Liabilities Included in Consolidated Balance Sheets (Detail) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Variable Interest Entity [Line Items]
Property and equipment, net	$ 7,944	$ 7,975
Cash and cash equivalents	276	410
Restricted cash	14	15
Accounts receivable, net	172	153
Prepaid expenses	76	82
Debt	2,949	2,948
Accounts payable and accrued expenses	162	183
Due to hotel manager	110	137
Other liabilities	213	332
Consolidated VIEs [Member]
Variable Interest Entity [Line Items]
Property and equipment, net	223	223
Cash and cash equivalents	11	12
Restricted cash	2	1
Accounts receivable, net	4	4
Prepaid expenses	1	2
Debt	207	207
Accounts payable and accrued expenses	8	7
Due to hotel manager	1	2
Other liabilities	$ 1	$ 1