Amounts Attributable to Noncontrolling Interest Of Outside Partnerships

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

- Definition

Finite Lived Partnership Life

+ Details

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

- Definition

Finite Lived Partnership, Termination Date

+ Details

Name:	hst_FiniteLivedPartnershipTerminationDate
Namespace Prefix:	hst
Data Type:	xbrli:gYearItemType
Balance Type:	na
Period Type:	instant

- Definition

Number Of Compensation Plans

+ Details

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

- Definition

Number of Hotels

+ Details

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

- Definition

Number of lodging properties owned.

+ Details

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

- Definition

Number Of Partnerships Consolidated

+ Details

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

- Definition

Number of Partnerships Consolidated with Finite Lives

+ Details

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

- Definition

Operating Partnership Units Conversion Basis

+ Details

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

- Definition

Percentage of Net Revenue

+ Details

Name:	hst_PercentageOfNetRevenue
Namespace Prefix:	hst
Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage Of Ownership Interests

+ Details

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

- Definition

Significant Accounting Policies [Line Items]

+ Details

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

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 19, 22
-Article 5

+ Details

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

- Definition

Maximum amount the entity would be obligated to pay on the credit risk derivatives upon occurrence of a credit event.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 15A, 15B, 15C, 15D

+ Details

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

- Definition

Total of all Stockholders' Equity (deficit) items, net of receivables from officers, directors owners, and affiliates of the entity which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 27
-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 20
-Article 7

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 26

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph A3
-Appendix A

+ Details

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

- Definition

The portion of net income (loss) attributable to the noncontrolling interest (if any) deducted in order to derive the portion attributable to the parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph a

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph c(1)

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph A1, A4, A5

+ Details

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

- Definition

The maximum useful life of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land and improvements, buildings, and production equipment.

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLifeMaximum
Namespace Prefix:	us-gaap
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

- Definition

The minimum useful life of long lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land and improvements, buildings, and production equipment.

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLifeMinimum
Namespace Prefix:	us-gaap
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2010 Year Entity Contract Location	Dec. 31, 2009	Dec. 31, 2008
Significant Accounting Policies [Line Items]
Number of luxury and upper-upscale, hotel lodging properties	113
Exposure risk related for derivative contracts	$ 18
Amount of borrowing capacity currently available under the credit facility	542
Percentage of property revenue allocated for renewal and replacement capital expenditures	5.00%
Net income (loss) attributable to non-controlling interests, Host Inc.	2	5	(16)
Number of majority-owned partnerships that have third-party, non-controlling ownership interests that have been consolidated	4
Number of majority-owned partnerships that have third-party, non-controlling ownership interests with finite lives	3
Non-controlling interests in outside partnerships	29	22
Stock-based employee compensation plans	2
Building
Significant Accounting Policies [Line Items]
Estimated useful lives, maximum (in years)	40
Furniture and Fixtures
Significant Accounting Policies [Line Items]
Estimated useful lives, minimum (in years)	3
Estimated useful lives, maximum (in years)	10
Property, Plant and Equipment, Other Types
Significant Accounting Policies [Line Items]
Estimated useful lives, maximum (in years)	3
HOST HOTELS & RESORTS, INC.
Significant Accounting Policies [Line Items]
Percentage of the common OP Units	98.40%
Net income (loss) attributable to non-controlling interests, Host Inc.	(2)	(6)	19
Non-controlling interests in outside partnerships	29	22
HOST HOTELS & RESORTS L.P.
Significant Accounting Policies [Line Items]
Net income (loss) attributable to non-controlling interests, Host Inc.		(1)	3
Net (income) loss attributable to non-controlling interests outside partnerships	(0.4)	1.0	(3.0)
OP units conversion basis	one OP unit may now be exchanged into 1.021494 shares of Host common stock
Portion at Fair Value, Fair Value Disclosure
Significant Accounting Policies [Line Items]
Non-controlling interests in outside partnerships	$ 65	$ 44
Brazil
Significant Accounting Policies [Line Items]
Number of Lodging Properties Owned	1
Chile
Significant Accounting Policies [Line Items]
Number of Lodging Properties Owned	2
Canada
Significant Accounting Policies [Line Items]
Number of Lodging Properties Owned	4
Mexico
Significant Accounting Policies [Line Items]
Number of Lodging Properties Owned	1
United Kingdom
Significant Accounting Policies [Line Items]
Number of Lodging Properties Owned	1
Lower Limit
Significant Accounting Policies [Line Items]
Majority-owned partnerships with manditorily redeemable non-controlling interests, finite life (years)	99
Majority-owned partnerships with manditorily redeemable non-controlling interests, termination year	2081
Upper Limit
Significant Accounting Policies [Line Items]
Majority-owned partnerships with manditorily redeemable non-controlling interests, finite life (years)	100
Majority-owned partnerships with manditorily redeemable non-controlling interests, termination year	2095