Historical Cost and Redemption Values for Non-Controlling Interests (Detail) (HOST HOTELS & RESORTS L.P., USD $) In Millions, except Share data, unless otherwise specified	Jun. 15, 2012		Dec. 31, 2011
HOST HOTELS & RESORTS L.P.
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
OP units outstanding (millions)	10,000,000		10,500,000
Market price per Host Inc. common share	$ 15.58		$ 14.77
Shares issuable upon conversion of one OP unit	1.021494		1.021494
Redemption value (millions)	$ 160		$ 158
Historical cost (millions)	100		102
Book value (millions)	$ 160	[1]	$ 158	[1]

[1] The book value recorded is equal to the greater of the redemption value or the historical cost.