Dispositions - Additional Information (Detail) $ in Millions			6 Months Ended		12 Months Ended
	Jun. 23, 2015 USD ($)	Jun. 03, 2015 USD ($)	Jun. 30, 2015 USD ($) Hotel	Jun. 30, 2014 USD ($)	Dec. 31, 2014 Hotel
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Proceeds from sales of assets, net			$ 174	$ 274
Number of properties sold | Hotel			4		5
Park Ridge Marriott & Chicago Marriott O’Hare
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Proceeds from sales of assets, net	$ 89
Sheraton Needham
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Proceeds from sales of assets, net		$ 54