Host LP Earnings (Loss) Per Common Unit (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended																12 Months Ended
		Dec. 31, 2016	[2]	Sep. 30, 2016	[2]	Jun. 30, 2016	[2]	Mar. 31, 2016	[2]	Dec. 31, 2015	[2]	Sep. 30, 2015	[2]	Jun. 30, 2015	[2]	Mar. 31, 2015	[2]	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Earnings Per Share Diluted [Line Items]
NET INCOME																		$ 771	$ 565	$ 741
Less: Net (income) loss attributable to non-controlling interests																		(9)	(7)	(9)
NET INCOME ATTRIBUTABLE TO REPORTING ENTITY																		762	558	732
Assuming conversion of exchangeable senior debentures																				27
Diluted income attributable to Host Inc.																		$ 762	$ 558	$ 759
Basic weighted average shares outstanding																		743.0	752.4	755.4
Assuming weighted average shares for conversion of exchangeable senior debentures																				30.3
Assuming distribution of common units granted under the comprehensive stock plans, less units assumed purchased at market																		0.7	0.5	1.1
Diluted weighted average shares/units outstanding	[1]																	743.7	752.9	786.8
Basic earnings per common share																		$ 1.03	$ 0.74	$ 0.97
Diluted earnings per common share																		$ 1.02	$ 0.74	$ 0.96
HOST HOTELS & RESORTS L.P.
Earnings Per Share Diluted [Line Items]
NET INCOME																		$ 771	$ 565	$ 741
NET INCOME ATTRIBUTABLE TO REPORTING ENTITY		$ 127		$ 108		$ 352		$ 184		$ 165		$ 86		$ 215		$ 99		771	565	741
Assuming conversion of exchangeable senior debentures																				27
Diluted income attributable to Host Inc.																		$ 771	$ 565	$ 768
Basic weighted average shares outstanding																		736.3	745.7	748.9
Assuming weighted average shares for conversion of exchangeable senior debentures																				29.7
Assuming distribution of common units granted under the comprehensive stock plans, less units assumed purchased at market																		0.6	0.5	1.0
Diluted weighted average shares/units outstanding	[3]																	736.9	746.2	779.6
Basic earnings per common share		$ 0.17		$ 0.15		$ 0.48		$ 0.25		$ 0.22		$ 0.12		$ 0.29		$ 0.13		$ 1.05	$ 0.76	$ 0.99
Diluted earnings per common share		$ 0.17		$ 0.15		$ 0.48		$ 0.25		$ 0.22		$ 0.12		$ 0.29		$ 0.13		$ 1.05	$ 0.76	$ 0.99

[1] There were approximately 25 million potentially dilutive shares (on a weighted average basis) for the year ended December 31, 2015 related to our exchangeable senior debentures, which were anti-dilutive for the period. The exchangeable senior debentures were redeemed in 2015 in exchange for 32 million shares.

[2] Other income statement line items not presented for Host L.P. are equal to the amounts presented for Host Inc.

[3] There were approximately 25 million potentially dilutive units (on a weighted average basis) for the year ended December 31, 2015, related to our exchangeable senior debentures, which were anti-dilutive for the period. The exchangeable senior debentures were redeemed in 2015 and Host L.P. issued 31.3 million units.