Business Segment Information - Reconciliation of Revenues from Consolidated Hotels to Condensed Combined Consolidated Amounts and Net Loss to Hotel Adjusted EBITDA (Detail) - USD ($) $ in Millions		3 Months Ended						9 Months Ended
		Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Reconciliation of Revenue and Adjusted EBITDA from Segments to Consolidated Amounts [Line Items]
Total revenues		$ 423			$ 98			$ 911	$ 739
Net loss		(82)	$ (114)	$ (191)	(276)	$ (261)	$ (689)	(387)	(1,226)
Depreciation and amortization expense		68			75			213	225
Corporate general and administrative expense	[1]	14			13			48	40
Impairment and casualty loss, net		2			2			7	696
Acquisition costs		0			9			0	10
Other operating expenses		14			6			34	31
Loss (gain) on sales of assets, net		11			1			5	(62)
Interest income		0			0			0	(2)
Interest expense		66			59			195	149
Equity in losses from investments in affiliates		0			7			6	16
Income tax (benefit) expense		(3)			1			(2)	14
Severance expense		0			24			0	26
Other loss, net		5			3			7	6
Other items		4			3			(1)	9
Hotel Adjusted EBITDA		84			(76)			90	(93)
Total consolidated hotel revenue [Member]
Reconciliation of Revenue and Adjusted EBITDA from Segments to Consolidated Amounts [Line Items]
Total revenues		408			95			876	714
Other [Member]
Reconciliation of Revenue and Adjusted EBITDA from Segments to Consolidated Amounts [Line Items]
Total revenues		$ 15			$ 3			$ 35	$ 25

[1] Excludes severance expense.