Host LP Earnings (Loss) Per Common Unit (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Earnings Per Share Diluted [Line Items]
NET INCOME		$ 85	$ 145	$ 405	$ 489
Less: Net (income) loss attributable to non-controlling interests			(1)	(10)	(11)
NET INCOME ATTRIBUTABLE TO REPORTING ENTITY		85	144	395	478
Diluted income attributable to reporting entity		$ 85	$ 144	$ 395	$ 478
Basic weighted average shares outstanding		746.4	755.6	752.1	755.3
Assuming distribution of common shares granted under the comprehensive stock plans, less shares assumed purchased at market		0.4	0.8	0.4	0.7
Diluted weighted average shares outstanding	[1]	746.8	756.4	752.5	756.0
Basic earnings per common share		$ 0.11	$ 0.19	$ 0.53	$ 0.63
Diluted earnings per common share		$ 0.11	$ 0.19	$ 0.53	$ 0.63
HOST HOTELS & RESORTS L.P.
Earnings Per Share Diluted [Line Items]
NET INCOME		$ 85	$ 145	$ 405	$ 489
Less: Net (income) loss attributable to non-controlling interests		1	1	(5)	(4)
NET INCOME ATTRIBUTABLE TO REPORTING ENTITY		86	146	400	485
Diluted income attributable to reporting entity		$ 86	$ 146	$ 400	$ 485
Basic weighted average shares outstanding		739.9	749.1	745.5	748.8
Assuming distribution of common shares granted under the comprehensive stock plans, less shares assumed purchased at market		0.4	0.8	0.4	0.7
Diluted weighted average shares outstanding	[2]	740.3	749.9	745.9	749.5
Basic earnings per common share		$ 0.12	$ 0.19	$ 0.54	$ 0.65
Diluted earnings per common share		$ 0.12	$ 0.19	$ 0.54	$ 0.65

[1] There were approximately 31 million potentially dilutive shares for both the quarter ended and year-to-date period ended September 30, 2015, and approximately 30 million potentially dilutive shares for both the quarter and year-to-date periods ended September 30, 2014, related to our exchangeable senior debentures, which shares were not included in the computation of diluted earnings per share because to do so would have been anti-dilutive for the period.

[2] There were approximately 31 million potentially dilutive units for both the quarter ended and year-to-date period ended September 30, 2015 and approximately 30 million potentially dilutive units for both the quarter and year-to-date periods ended September 30, 2014 related to 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.