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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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

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

Variable Interest Entities (Details)	Dec. 31, 2011 VariableInterest Condition	Jan. 31, 2011 Doubletree Guest Suites Times Square	Dec. 31, 2011 Entity that owns the Hilton San Diego Bayfront
Variable Interest Entities
Number of conditions used to determine whether third-party management agreements are VIEs	6
Number of variable interests for which the Company is considered the primary beneficiary	3
Variable Interest Entity
Percentage of equity interest purchased (as a percent)		62.00%	75.00%