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, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Earnings Per Share Diluted [Line Items]
Net income	$ 214	$ 260	$ 505	$ 378
Less: Net (income) loss attributable to non-controlling interests	(4)	(4)	(8)	(6)
NET INCOME ATTRIBUTABLE TO HOST HOTELS & RESORTS, INC.	$ 210	$ 256	$ 497	$ 372
Basic weighted average shares outstanding	711.3	714.8	712.3	714.6
Assuming distribution of common shares granted under the comprehensive stock plans, less shares assumed purchased at market	1.9	2.2	1.9	2.2
Diluted weighted average shares outstanding	713.2	717.0	714.2	716.8
Basic earnings per common share	$ 0.30	$ 0.36	$ 0.70	$ 0.52
Diluted earnings per common share	$ 0.29	$ 0.36	$ 0.70	$ 0.52
HOST HOTELS & RESORTS L.P.
Earnings Per Share Diluted [Line Items]
Net income	$ 214	$ 260	$ 505	$ 378
Less: Net (income) loss attributable to non-controlling interests	(1)	1	(1)	0
NET INCOME ATTRIBUTABLE TO HOST HOTELS & RESORTS, INC.	$ 213	$ 261	$ 504	$ 378
Basic weighted average shares outstanding	706.3	710.0	707.3	709.5
Assuming distribution of common shares granted under the comprehensive stock plans, less shares assumed purchased at market	1.8	2.2	1.8	2.1
Diluted weighted average shares outstanding	708.1	712.2	709.1	711.6
Basic earnings per common share	$ 0.30	$ 0.37	$ 0.71	$ 0.53
Diluted earnings per common share	$ 0.30	$ 0.37	$ 0.71	$ 0.53