Quarterly Financial Data (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended																12 Months Ended
	Dec. 31, 2016		Sep. 30, 2016		Jun. 30, 2016		Mar. 31, 2016		Dec. 31, 2015		Sep. 30, 2015		Jun. 30, 2015		Mar. 31, 2015		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Quarterly Financial Information [Line Items]
Revenues																	$ 5,430	$ 5,350	$ 5,321
Operating profit																	684	631	694
NET INCOME																	771	565	741
Net income attributable to Host Hotels & Resorts, Inc.																	$ 762	$ 558	$ 732
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, INC.
Quarterly Financial Information [Line Items]
Revenues	$ 1,337		$ 1,295		$ 1,459		$ 1,339		$ 1,326		$ 1,283		$ 1,439		$ 1,302
Operating profit	150		144		239		151		143		133		222		133
NET INCOME	128		108		351		184		165		87		214		99
Net income attributable to Host Hotels & Resorts, Inc.	$ 126		$ 107		$ 347		$ 182		$ 163		$ 85		$ 212		$ 98
Basic earnings per common share	$ 0.17		$ 0.14		$ 0.47		$ 0.24		$ 0.22		$ 0.11		$ 0.28		$ 0.13
Diluted earnings per common share	$ 0.17		$ 0.14		$ 0.47		$ 0.24		$ 0.22		$ 0.11		$ 0.28		$ 0.13
HOST HOTELS & RESORTS L.P.
Quarterly Financial Information [Line Items]
Revenues																	$ 5,430	$ 5,350	$ 5,321
Operating profit																	684	631	694
NET INCOME																	771	565	741
Net income attributable to Host Hotels & Resorts, Inc.	$ 127	[1]	$ 108	[1]	$ 352	[1]	$ 184	[1]	$ 165	[1]	$ 86	[1]	$ 215	[1]	$ 99	[1]	$ 771	$ 565	$ 741
Basic earnings per common share	$ 0.17	[1]	$ 0.15	[1]	$ 0.48	[1]	$ 0.25	[1]	$ 0.22	[1]	$ 0.12	[1]	$ 0.29	[1]	$ 0.13	[1]	$ 1.05	$ 0.76	$ 0.99
Diluted earnings per common share	$ 0.17	[1]	$ 0.15	[1]	$ 0.48	[1]	$ 0.25	[1]	$ 0.22	[1]	$ 0.12	[1]	$ 0.29	[1]	$ 0.13	[1]	$ 1.05	$ 0.76	$ 0.99

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