Summary of Hotel Revenues by Market Locations (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation Of Revenue [Line Items]
Total revenues	$ 844	$ 198	$ 1,892	$ 1,353
Maui/Oahu
Disaggregation Of Revenue [Line Items]
Total revenues	118	4	260	98
Florida Gulf Coast
Disaggregation Of Revenue [Line Items]
Total revenues	49	33	215	160
Phoenix
Disaggregation Of Revenue [Line Items]
Total revenues	54	17	171	108
Miami
Disaggregation Of Revenue [Line Items]
Total revenues	40	12	152	77
San Diego
Disaggregation Of Revenue [Line Items]
Total revenues	85	16	140	108
Orlando
Disaggregation Of Revenue [Line Items]
Total revenues	52	2	97	58
New York
Disaggregation Of Revenue [Line Items]
Total revenues	51	9	87	102
Los Angeles/Orange County
Disaggregation Of Revenue [Line Items]
Total revenues	42	16	81	75
San Francisco/San Jose
Disaggregation Of Revenue [Line Items]
Total revenues	44	12	80	124
Washington, D.C. (Central Business District)
Disaggregation Of Revenue [Line Items]
Total revenues	29	4	72	61
Jacksonville
Disaggregation Of Revenue [Line Items]
Total revenues	29	16	72	44
Houston
Disaggregation Of Revenue [Line Items]
Total revenues	21	7	53	36
San Antonio/Austin
Disaggregation Of Revenue [Line Items]
Total revenues	27	3	53	21
Atlanta
Disaggregation Of Revenue [Line Items]
Total revenues	22	9	51	42
Boston
Disaggregation Of Revenue [Line Items]
Total revenues	29	2	42	38
Chicago
Disaggregation Of Revenue [Line Items]
Total revenues	25	4	38	22
Northern Virginia
Disaggregation Of Revenue [Line Items]
Total revenues	18	5	37	27
Philadelphia
Disaggregation Of Revenue [Line Items]
Total revenues	17	6	33	20
Denver
Disaggregation Of Revenue [Line Items]
Total revenues	17	4	29	21
New Orleans
Disaggregation Of Revenue [Line Items]
Total revenues	11	5	24	29
Seattle
Disaggregation Of Revenue [Line Items]
Total revenues	16	2	23	20
Other
Disaggregation Of Revenue [Line Items]
Total revenues	39	8	68	44
United States
Disaggregation Of Revenue [Line Items]
Total revenues	835	196	1,878	1,335
International
Disaggregation Of Revenue [Line Items]
Total revenues	$ 9	$ 2	$ 14	$ 18