Host Inc. Earnings (Loss) Per Common Share (Detail) (HOST HOTELS & RESORTS, INC., USD $) In Millions, except Share data	3 Months Ended				9 Months Ended
	Sep. 09, 2011		Sep. 10, 2010		Sep. 09, 2011		Sep. 10, 2010
HOST HOTELS & RESORTS, INC.
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]
Net loss	$ (35)		$ (61)		$ (32)		$ (126)
Less: Net loss attributable to non-controlling interests	2		3				2
Dividends on preferred stock							(4)
Issuance costs of redeemed preferred stock							(4)	[1]
NET LOSS AVAILABLE TO COMMON STOCKHOLDERS	(33)		(58)		(32)		(132)
Diluted loss available to common stockholders	$ (33)		$ (58)		$ (32)		$ (132)
Basic weighted average shares outstanding	702.1		654.5		688.4		651.7
Diluted weighted average shares outstanding	702.1	[2]	654.5	[2]	688.4	[2]	651.7	[2]
Basic loss per share	$ (0.05)		$ (0.09)		$ (0.05)		$ (0.20)
Diluted loss per share	$ (0.05)		$ (0.09)		$ (0.05)		$ (0.20)

[1] Represents the original issuance costs associated with the Class E preferred stock, which was redeemed during the second quarter 2010.

[2] There were approximately 42 million and 48 million for the quarter and year-to-date periods ended September 9, 2011, respectively, and 52 million for the quarter and year-to-date periods ended September 10. 2010, potentially dilutive shares related to our Exchangeable Senior Debentures and shares granted under comprehensive stock plans, which were not included in the computation of diluted earnings per share because to do so would have been anti-dilutive for the period.