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Historical Cost and Redemption Values for Non-Controlling Interests (Detail) (HOST HOTELS & RESORTS L.P., USD $)
In Millions, except Share data, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
HOST HOTELS & RESORTS L.P.
   
Shares Subject To Mandatory Redemption By Settlement Terms [Line Items]    
OP units outstanding 9,700,000 9,900,000
Market price per Host Inc. common share $ 17.67 $ 15.67
Shares issuable upon conversion of one OP unit 1.021494 1.021494
Redemption value $ 175 $ 158
Historical cost 96 96
Book value $ 175 [1] $ 158 [1]
[1] The book value recorded is equal to the greater of redemption value or historical cost