Percentage of voting equity interests acquired in the business combination.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 68

-Subparagraph c

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6909870&loc=d3e1392-128463

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Summary of Significant Accounting Policies (Details 6)	Jan. 31, 2011 Doubletree Guest Suites Times Square	Dec. 31, 2006 Doubletree Guest Suites Times Square Room	Jan. 31, 2011 BuyEfficient, LLC	Dec. 31, 2007 BuyEfficient, LLC Strategic Hotels and Resorts, Inc. ("Strategic")
Investments in unconsolidated joint ventures
Ownership interest acquired (as a percent)	62.00%	38.00%	50.00%
Number of rooms in acquired hotels		460
Ownership interest sold to Strategic (as a percent)				50.00%