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				9 Months Ended
	Sep. 30, 2013		Sep. 07, 2012		Sep. 07, 2012		Sep. 30, 2013
HOST HOTELS & RESORTS L.P.
Schedule Of Earnings Per Share Basic And Diluted By Common Class [Line Items]
NET INCOME (LOSS)	$ 18		$ (36)		$ 48		$ 199
Less: Net (income) loss attributable to non-controlling interests	1		1		(1)		(2)
Net income (loss) attributable to Host L.P.	19		(35)		47		197
Diluted income (loss) attributable to Host L.P.	$ 19		$ (35)		$ 47		$ 197
Basic weighted average shares outstanding	743.0		716.2		710.8		735.1
Diluted weighted average shares outstanding	743.6	[1]	716.2	[1]	710.8	[1]	739.0	[1]
Basic earnings (loss) per common unit	$ 0.03		$ (0.05)		$ 0.07		$ 0.27
Diluted earnings (loss) per common unit	$ 0.03		$ (0.05)		$ 0.07		$ 0.27

[1] There were approximately 29 million for both the quarter and year-to-date periods ended September 30, 2013 and approximately 40 million and 39 million for the quarter and year-to-date ended September 7, 2012, respectively, potentially dilutive units for our exchangeable senior debentures, which units were not included in the computation of diluted earnings (loss) per unit because to do so would have been anti-dilutive for the period.