Historical Cost and Redemption Values for Non-Controlling Interests (Detail) $ / shares in Units, shares in Millions, $ in Millions		Sep. 30, 2016 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) $ / shares shares
Shares Subject To Mandatory Redemption By Settlement Terms [Line Items]
Book value (millions)		$ 138	$ 143
HOST HOTELS & RESORTS L.P.
Shares Subject To Mandatory Redemption By Settlement Terms [Line Items]
OP units outstanding (millions) | shares		8.7	9.1
Market price per Host Inc. common share | $ / shares		$ 15.57	$ 15.34
Shares issuable upon conversion of one OP unit		1.021494	1.021494
Redemption value (millions)		$ 138	$ 143
Historical cost (millions)		86	90
Book value (millions)	[1]	$ 138	$ 143

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