Investments in Affiliates - Additional Information (Detail) In Millions, unless otherwise specified	9 Months Ended		1 Months Ended			0 Months Ended
	Sep. 30, 2014 USD ($)	Sep. 30, 2013 USD ($)	Sep. 30, 2014 European Joint Venture Grand Hotel Esplanade USD ($) Room	Sep. 30, 2014 European Joint Venture Grand Hotel Esplanade EUR (€) Room	Sep. 30, 2014 European Joint Venture Grand Hotel Esplanade EURIBOR	Oct. 16, 2014 European Joint Venture Sheraton Skyline Hotel And Conference Centre Subsequent Event USD ($) Room	Oct. 16, 2014 European Joint Venture Sheraton Skyline Hotel And Conference Centre Subsequent Event GBP (£) Room
Investments In And Advances To Affiliates [Line Items]
Investment ownership percentage			90.00%	90.00%
Acquisition date total consideration transferred			$ 102	€ 81
Number of rooms			394	394		350	350
Amount of debt assumed at acquisition			61	48
Debt instrument basis points over euribor					2.19%
Amount contributed at acquisition			14	10
Proceeds from sales of assets, net	$ 274	$ 446				$ 53	£ 33