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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Property
Contract
Entity
Room
Dec. 31, 2010
Dec. 31, 2009
Significant Accounting Policies [Line Items]      
Number of rooms 1,750    
Equity investment, percentage ownership acquired 36.00%    
Number of properties to be developed with Accor and InterGlobe with agreement 7    
Percentage of property revenue allocated for renewal and replacement capital expenditures 5.00%    
Impairment charges $ 8    
Number of impaired assets 2    
Number of properties disposed 1    
Net (income) loss attributable to non-controlling interests outside partnerships (1.0) 0.4 (1.0)
Number of majority-owned partnerships that have third-party, non-controlling ownership interests that have been consolidated 5    
Number of majority-owned partnerships that have third-party, non-controlling ownership interests with finite lives 3    
Non-controlling interests in outside partnerships 36 29  
Net income (loss) attributable to non-controlling interests, Host Inc.   (2) (5)
Stock-based employee compensation plans 2    
Exposure risk related for derivative contracts 22    
Amount of borrowing capacity currently available under the credit facility 883    
European Joint Venture
     
Significant Accounting Policies [Line Items]      
Number of luxury and upper-upscale, hotel lodging properties 13    
Number of rooms 4,200    
Asian Joint Venture
     
Significant Accounting Policies [Line Items]      
Equity method investment, ownership percentage 25.00%    
United States
     
Significant Accounting Policies [Line Items]      
Number of luxury and upper-upscale, hotel lodging properties 105    
Number of rooms 60,700    
Outside United States
     
Significant Accounting Policies [Line Items]      
Number of luxury and upper-upscale, hotel lodging properties 16    
Number of rooms 4,300    
Lower Limit
     
Significant Accounting Policies [Line Items]      
Majority-owned partnerships with manditorily redeemable non-controlling interests, finite life (years) 99 years    
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 years    
Majority-owned partnerships with manditorily redeemable non-controlling interests, termination year 2095    
HOST HOTELS & RESORTS, INC.
     
Significant Accounting Policies [Line Items]      
Percentage of the common OP Units 98.50%    
Non-controlling interests in outside partnerships 36 29  
Net income (loss) attributable to non-controlling interests, Host Inc. (1) (2) (6)
HOST HOTELS & RESORTS L.P.
     
Significant Accounting Policies [Line Items]      
OP units conversion basis   One OP unit now may be exchanged into 1.021494 shares of Host common stock  
Net income (loss) attributable to non-controlling interests, Host Inc. (1)   (1)
Portion at Fair Value, Fair Value Disclosure
     
Significant Accounting Policies [Line Items]      
Non-controlling interests in outside partnerships $ 67 $ 65  
Property, Plant and Equipment, Other Types
     
Significant Accounting Policies [Line Items]      
Estimated useful lives, maximum (in years) 3