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Investments in Affiliates - Additional Information (Detail) In Millions, unless otherwise specified		1 Months Ended
	Mar. 23, 2012 Room	Mar. 06, 2012 Asian Joint Venture Citigate Perth USD ($) Room	Mar. 06, 2012 Asian Joint Venture Citigate Perth AUD	Mar. 23, 2012 Asian Joint Venture Citigate Perth Room
Schedule of Investments [Line Items]
Number of rooms	64,004	278	278	278
Acquisition purchase price		$ 64	61
Renovation cost		18	17
Partners contribution		$ 16	14

This element represents the acquisition-date fair value of the total consideration transferred which consists of the sum of the acquisition-date fair values of the assets transferred by the acquirer, the liabilities incurred by the acquirer to former owners of the acquiree, and the equity interests issued by the acquirer.

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