Host LP Earnings (Loss) Per Common Unit (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share Diluted [Line Items]
NET INCOME	$ 290	$ 211	$ 479	$ 467
Less: Net income attributable to non-controlling interests	(4)	(2)	(7)	(5)
NET INCOME ATTRIBUTABLE TO REPORTING ENTITY	$ 286	$ 209	$ 472	$ 462
Basic weighted average shares outstanding	739.1	739.7	739.9	739.5
Assuming distribution of common units to support shares granted under the comprehensive stock plans, less shares assumed purchased at market	0.3	0.5	0.3	0.4
Diluted weighted average shares/units outstanding	739.4	740.2	740.2	739.9
Basic earnings per common share	$ 0.39	$ 0.28	$ 0.64	$ 0.62
Diluted earnings per common share	$ 0.39	$ 0.28	$ 0.64	$ 0.62
HOST HOTELS & RESORTS L.P.
Earnings Per Share Diluted [Line Items]
NET INCOME	$ 290	$ 211	$ 479	$ 467
Less: Net income attributable to non-controlling interests	(1)		(2)
NET INCOME ATTRIBUTABLE TO REPORTING ENTITY	$ 289	$ 211	$ 477	$ 467
Basic weighted average shares outstanding	731.1	732.2	731.9	732.1
Assuming distribution of common units to support shares granted under the comprehensive stock plans, less shares assumed purchased at market	0.3	0.5	0.3	0.4
Diluted weighted average shares/units outstanding	731.4	732.7	732.2	732.5
Basic earnings per common share	$ 0.40	$ 0.29	$ 0.65	$ 0.64
Diluted earnings per common share	$ 0.40	$ 0.29	$ 0.65	$ 0.64