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Historical Cost and Redemption Values for Non-Controlling Interests (Detail) (USD $)
In Millions, except Per Share data, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Shares Subject To Mandatory Redemption By Settlement Terms [Line Items]    
Book value $ 204 $ 190
HOST HOTELS & RESORTS L.P.
   
Shares Subject To Mandatory Redemption By Settlement Terms [Line Items]    
OP units outstanding 9.4 9.5
Market price per Host Inc. common share $ 21.33 $ 19.44
Shares issuable upon conversion of one OP unit 1.021494 1.021494
Redemption value 204 190
Historical cost 94 95
Book value $ 204 [1] $ 190 [1]
[1] The book value recorded is equal to the greater of redemption value or historical cost.