Business Segment Information - Reconciliation of Revenues from Consolidated Hotels to Condensed Combined Consolidated Amounts and Hotel Adjusted EBITDA to Net Income (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Reconciliation of Revenue and Adjusted EBITDA from Segments to Consolidated Amounts [Line Items]
Total revenues	$ 659	$ 668
Hotel Adjusted EBITDA	181	174
Depreciation and amortization expense	(62)	(70)
Corporate general and administrative expense	(17)	(16)
Other expenses	(20)	(17)
Gain on sales of assets, net	31	89
Interest income	1	1
Interest expense	(32)	(31)
Equity in earnings from investments in affiliates	5	4
Gain on foreign currency transactions		1
Income tax expense	(7)	(5)
Other gain, net	1
Other items	(2)	(3)
Net income	97	149
Total consolidated hotel revenue [Member]
Reconciliation of Revenue and Adjusted EBITDA from Segments to Consolidated Amounts [Line Items]
Total revenues	641	651
Other [Member]
Reconciliation of Revenue and Adjusted EBITDA from Segments to Consolidated Amounts [Line Items]
Total revenues	$ 18	$ 17