Dispositions - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended	12 Months Ended	3 Months Ended			0 Months Ended
	Sep. 30, 2013 Hotel	Dec. 31, 2012 Hotel	Jun. 30, 2013 Ritz-Carlton, San Francisco	Sep. 30, 2013 Ritz-Carlton, San Francisco Final Closing Obligations	Mar. 31, 2013 Atlanta Marriott Marquis	Nov. 01, 2013 Subsequent Event Portland Marriott
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Proceeds from sales of assets, net			$ 161		$ 293	$ 87
Number of properties sold		3
Number of properties considered as held for sale	1
Recognized gain on sale of properties				$ 14