Summary of Hotel Revenues by Market Locations (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Disaggregation Of Revenue [Line Items]
Revenues	$ 1,390	$ 1,346
San Francisco/San Jose
Disaggregation Of Revenue [Line Items]
Revenues	135	107
San Diego
Disaggregation Of Revenue [Line Items]
Revenues	129	133
Florida Gulf Coast
Disaggregation Of Revenue [Line Items]
Revenues	121	98
Phoenix
Disaggregation Of Revenue [Line Items]
Revenues	109	97
Maui/Oahu
Disaggregation Of Revenue [Line Items]
Revenues	104	81
New York
Disaggregation Of Revenue [Line Items]
Revenues	103	161
Washington, D.C. (Central Business District)
Disaggregation Of Revenue [Line Items]
Revenues	75	73
Orlando
Disaggregation Of Revenue [Line Items]
Revenues	70	70
Boston
Disaggregation Of Revenue [Line Items]
Revenues	54	54
Atlanta
Disaggregation Of Revenue [Line Items]
Revenues	46	42
Los Angeles
Disaggregation Of Revenue [Line Items]
Revenues	45	47
Miami
Disaggregation Of Revenue [Line Items]
Revenues	42	19
Northern Virginia
Disaggregation Of Revenue [Line Items]
Revenues	36	36
Houston
Disaggregation Of Revenue [Line Items]
Revenues	31	32
San Antonio
Disaggregation Of Revenue [Line Items]
Revenues	31	30
Orange County
Disaggregation Of Revenue [Line Items]
Revenues	30	29
New Orleans
Disaggregation Of Revenue [Line Items]
Revenues	30	28
Jacksonville
Disaggregation Of Revenue [Line Items]
Revenues	28	23
Chicago
Disaggregation Of Revenue [Line Items]
Revenues	27	30
Seattle
Disaggregation Of Revenue [Line Items]
Revenues	24	25
Denver
Disaggregation Of Revenue [Line Items]
Revenues	19	18
Philadelphia
Disaggregation Of Revenue [Line Items]
Revenues	18	19
Other
Disaggregation Of Revenue [Line Items]
Revenues	64	68
United States
Disaggregation Of Revenue [Line Items]
Revenues	1,371	1,320
International
Disaggregation Of Revenue [Line Items]
Revenues	$ 19	$ 26