Commitments and Contingencies Disclosure [Line Items]

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- Definition

Debt Instrument Maturity Period

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- Definition

Number of Hotels Sold

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- Definition

Number of Properties

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- Definition

Amount due based upon the occurrence of an event specified in the contractual terms.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 13
-Paragraph 16
-Subparagraph a(iv)

+ Details

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- Definition

The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 5
-Paragraph 9

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 45
-Paragraph 13
-Subparagraph c

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- Definition

Carrying amount as of the balance sheet date of reserves for the costs of settling insured claims and costs incurred in the claims settlement process attributable to asbestos and environmental claims, before estimated recoveries from reinsurers.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Audit and Accounting Guide (AAG)
-Number AAG-PLI
-Chapter 4
-Paragraph 132, 133, 135, 136, 137
-IssueDate 2006-09-01

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Statement of Position (SOP)
-Number 94-5
-Paragraph 11, 12

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- Definition

The total of future contractually required payments on leases defined as operating.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 13
-Paragraph 122

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 13
-Paragraph 16
-Subparagraph b(i)

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Guarantees and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended				12 Months Ended	1 Months Ended
	Dec. 31, 2010 Year Entity Contract Location	Dec. 31, 2009 Entity	Dec. 31, 2008 Entity	Jul. 06, 2010 Entity	Dec. 31, 2010 Municipal Bonds	Jan. 31, 2005 Contingent Consideration Entity	Dec. 31, 2010 Indemnification Agreement	Dec. 31, 2010 Starwood Environmental Remediation Expense Entity	Dec. 31, 2010 Starwood
Commitments and Contingencies Disclosure [Line Items]
Aggregate contingent liabilities relating to our former restaurant business	$ 18
Guarantee obligation amount					14.7
Debt maturity date	2011				2027
Hotel sold that are still contingently liable for ground lease	2	6	2			2
Future minimum lease payments	1,332						13
Number of properties				71				3
Environmental liabilities									$ 3