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, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share Diluted [Line Items]
NET INCOME	$ 105	$ 108	$ 478	$ 643
Less: Net (income) loss attributable to non-controlling interests	(1)	(1)	(6)	(7)
NET INCOME ATTRIBUTABLE TO REPORTING ENTITY	$ 104	$ 107	$ 472	$ 636
Basic weighted average shares outstanding	738.8	740.6	738.5	744.8
Assuming distribution of common units to support shares granted under the comprehensive stock plans, less shares assumed purchased at market	0.2	0.5	0.2	0.4
Diluted weighted average shares/units outstanding	739.0	741.1	738.7	745.2
Basic earnings per common share	$ 0.14	$ 0.14	$ 0.64	$ 0.85
Diluted earnings per common share	$ 0.14	$ 0.14	$ 0.64	$ 0.85
HOST HOTELS & RESORTS L.P.
Earnings Per Share Diluted [Line Items]
NET INCOME	$ 105	$ 108	$ 478	$ 643
Less: Net (income) loss attributable to non-controlling interests	1			1
NET INCOME ATTRIBUTABLE TO REPORTING ENTITY	$ 106	$ 108	$ 478	$ 644
Basic weighted average shares outstanding	731.6	733.8	731.4	738.1
Assuming distribution of common units to support shares granted under the comprehensive stock plans, less shares assumed purchased at market	0.2	0.5	0.2	0.4
Diluted weighted average shares/units outstanding	731.8	734.3	731.6	738.5
Basic earnings per common share	$ 0.14	$ 0.15	$ 0.65	$ 0.87
Diluted earnings per common share	$ 0.14	$ 0.15	$ 0.65	$ 0.87