Historical Cost and Redemption Values for Non-Controlling Interests (Detail) $ / shares in Units, shares in Millions, $ in Millions		Dec. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2014 USD ($) $ / shares shares
Shares Subject To Mandatory Redemption By Settlement Terms [Line Items]
Book value (millions)		$ 143	$ 225
HOST HOTELS & RESORTS L.P.
Shares Subject To Mandatory Redemption By Settlement Terms [Line Items]
OP units outstanding (millions) | shares		9.1	9.3
Market price per Host Inc. common share | $ / shares		$ 15.34	$ 23.77
Shares issuable upon conversion of one OP unit		1.021494	1.021494
Redemption value (millions)		$ 143	$ 225
Historical cost (millions)		90	94
Book value (millions)	[1]	$ 143	$ 225

[1] The book value recorded is equal to the greater of the redemption value or the historical cost.