Host LP Earnings (Loss) Per Common Unit (Detail) (HOST HOTELS & RESORTS L.P., USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 15, 2012		Jun. 17, 2011		Jun. 15, 2012		Jun. 17, 2011
HOST HOTELS & RESORTS L.P.
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]
Net income	$ 83		$ 64		$ 83		$ 4
Net income attributable to non-controlling interests			(1)		(2)		(2)
Earnings available to common unitholders	83		63		81		2
Assuming conversion of exchangeable senior debentures	1
Diluted earnings available to common unitholders	$ 84		$ 63		$ 81		$ 2
Basic weighted average units outstanding	713.1		682.0		708.1		677.8
Assuming weighted average units for conversion of exchangeable senior debentures	11.4
Assuming distribution of units to Host Inc. for shares granted under its comprehensive stock plans, less shares assumed purchased at market price	0.9		1.3		1.0		1.4
Diluted weighted average units outstanding	725.4	[1]	683.3	[1]	709.1	[1]	679.2	[1]
Basic earnings per common unit	$ 0.12		$ 0.09		$ 0.11
Diluted earnings per common unit	$ 0.12		$ 0.09		$ 0.11

[1] There were approximately 28 million and 39 million for the quarter and year-to-date periods ended June 15, 2012, respectively, and 49 million for both the quarter and year-to-date periods ended June 17, 2011, potentially dilutive units for our exchangeable senior debentures, which units were not included in the computation of diluted earnings per unit because to do so would have been anti-dilutive for the period.