Dispositions - Additional Information (Detail) AUD in Millions, $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2017 USD ($)	Sep. 30, 2017 AUD	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Proceeds from sales of assets, net				$ 472	$ 464
Total gain on sale of assets	$ 59		$ 14	$ 105	$ 245
Hilton Melbourne South Wharf Hotel
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Proceeds from sales of assets, net	184	AUD 230
Tax effect of disposition	22
Sheraton Indianapolis Hotel at Keystone Crossing
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Proceeds from sales of assets, net	66
Hilton Melbourne South Wharf Hotel and Sheraton Indianapolis Hotel
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Total gain on sale of assets	$ 58