Consolidated Variable Interest Entities ("VIEs") and Investments in Affiliates - Schedule of Assets and Liabilities Included in Consolidated Balance Sheets (Detail) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Variable Interest Entity [Line Items]
Property and equipment, net	$ 9,986	$ 7,975
Cash and cash equivalents	321	410
Restricted cash	43	15
Accounts receivable, net	193	153
Prepaid expenses	76	82
Debt	4,100	2,948
Accounts payable and accrued expenses	237	183
Due to hotel manager	128	137
Other liabilities	241	332
Consolidated VIEs [Member]
Variable Interest Entity [Line Items]
Property and equipment, net	221	223
Cash and cash equivalents	19	12
Restricted cash	2	1
Accounts receivable, net	5	4
Prepaid expenses	1	2
Debt	207	207
Accounts payable and accrued expenses	9	7
Due to hotel manager		2
Other liabilities	$ 2	$ 1