Expected Lease Payments Risk Adjusted Rate

Name:	hst_ExpectedLeasePaymentsRiskAdjustedRate
Namespace Prefix:	hst
Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Leases Disclosure [Line Items]

+ Details

Name:	hst_LeasesDisclosureLineItems
Namespace Prefix:	hst
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number Of Hotels Subject To Ground Leases

+ Details

Name:	hst_NumberOfHotelsSubjectToGroundLeases
Namespace Prefix:	hst
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of Properties

+ Details

Name:	hst_NumberOfProperties
Namespace Prefix:	hst
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number Of Renewal Options

+ Details

Name:	hst_NumberOfRenewalOptions
Namespace Prefix:	hst
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Proceeds Due From Deferred Sale

+ Details

Name:	hst_ProceedsDueFromDeferredSale
Namespace Prefix:	hst
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Deferred sale proceeds received from HPT

+ Details

Name:	hst_ProceedsReceivedFromDeferredSale
Namespace Prefix:	hst
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Renewal Option Terms Maximum Additional Period in Years

+ Details

Name:	hst_RenewalOptionTermsMaximumAdditionalPeriodInYears
Namespace Prefix:	hst
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

Renewal Option Terms Minimum Additional Period in Years

+ Details

Name:	hst_RenewalOptionTermsMinimumAdditionalPeriodInYears
Namespace Prefix:	hst
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

The amount of acquisition cost of a business combination allocated to capital lease obligations assumed from the acquired entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141
-Paragraph 51
-Subparagraph e

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141
-Paragraph 37
-Subparagraph g

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 98-1

+ Details

Name:	us-gaap_BusinessAcquisitionPurchasePriceAllocationCapitalLeaseObligationAccrual
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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

Name:	us-gaap_CapitalLeasesContingentRentalPaymentsDue
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

A general description of the nature of the existing leasing arrangements of a lessor' for all operating leases including, but not limited to: (1) rental escalation clauses; (2) renewal or purchase options; (3) guarantees or indemnities, if any, (4) restrictions imposed by lease arrangements; (5) unusual provisions or conditions; (6) contingent rentals, if any; and (7) lease expiration dates.

+ Details

Name:	us-gaap_DescriptionOfLesseeLeasingArrangementsOperatingLeases
Namespace Prefix:	us-gaap
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The aggregate direct costs incurred in operating leased, owned and other hotels.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 2
-Article 5

+ Details

Name:	us-gaap_DirectCostsOfHotels
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

This element represents the total aggregate minimum sublease rentals, if any, to be received under noncancelable subleases existing as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 98
-Paragraph 18
-Subparagraph b

+ Details

Name:	us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactions
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ Details

Name:	us-gaap_OperatingIncomeLoss
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The total amount of revenue recognized for the period from operating leases, including minimum lease revenue, contingent revenue, percentage revenue and sublease revenue.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 13
-Paragraph 19
-Subparagraph b

+ Details

Name:	us-gaap_OperatingLeasesIncomeStatementLeaseRevenue
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The total amount of rentals incurred in the period on property subject to subleasing arrangements.

+ 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 c

+ Details

Name:	us-gaap_OperatingLeasesRentExpenseSubleaseRentals
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Aggregate revenue generated from managing and operating hotels.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 1
-Article 5

+ Details

Name:	us-gaap_RevenueFromLeasedAndOwnedHotels
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Leases - Additional Information (Detail) In Millions, unless otherwise specified	12 Months Ended			12 Months Ended				6 Months Ended		12 Months Ended
	Dec. 31, 2010 USD ($) Year Entity Contract Location	Dec. 31, 2009	Jul. 06, 2010 Entity	Dec. 31, 2010 Courtyard By Marriott Hotel USD ($)	Dec. 31, 1995 Courtyard By Marriott Hotel Leasehold Interest Entity	Dec. 31, 2010 Residence Inn By Marriott Leasehold Interest Entity	Dec. 31, 1996 Residence Inn By Marriott Sublease Entity	Dec. 31, 2010 Hospitality Properties Trust USD ($)	Jul. 06, 2010 Hospitality Properties Trust USD ($)	Dec. 31, 2010 Hospitality Properties Trust USD ($)	Dec. 31, 2009 Hospitality Properties Trust USD ($)	Dec. 31, 2008 Hospitality Properties Trust USD ($)	Jul. 22, 2010 Le Meridien Piccadilly Leasehold Interest USD ($)	Jul. 22, 2010 Le Meridien Piccadilly Leasehold Interest GBP (£)	Dec. 31, 2010 Upper Limit Property Subject to Operating Lease Entity	Dec. 31, 2010 Lower Limit Right Year
Leases Disclosure [Line Items]
Number of properties			71		53	18	18
Hotel revenues								$ 123
Rental income									44
Hotel expenses								96
Rental expense									84
Operating income (loss) from property revenues and rental income										(13)	(1)	4
Proceeds due from deferred sale of HPT				51
Deferred sale proceeds received from HPT										17.2
Number of hotels subject to ground leases															36
Expected lease payments, discount adjustment													10.00%	10.00%
Capital lease obligation assumed in acquisition	58												58	38
Operating leases information	leases and subleases contain one or more renewal options	The 2009 dispositions include one hotel for which our ground lease expired in 2009 and, in connection therewith, the hotel reverted back to the ground lessor in 2010.
Minimum additional renewal option period	5
Maximum additional renewal option period	10
Number of renewal options																1
Minimum payments from restaurants and the Sublessee payable to us under non-cancelable subleases	6
Aggregate contingent liabilities relating to our former restaurant business	$ 18