Non-Controlling Interests - Additional Information (Detail) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016 USD ($) Entity	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) Entity	Jun. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)
Minority Interest [Line Items]
Number of majority-owned partnerships that have third-party, non-controlling ownership interests that have been consolidated | Entity	4		4
Non-controlling interests—other consolidated partnerships	$ 39		$ 39		$ 40
Number of majority-owned partnerships that have third-party, non-controlling ownership interests with finite lives | Entity	1		1
Majority-owned partnerships with mandatorily redeemable non-controlling interests, termination year			2095
Net loss attributable to non-controlling interests outside partnerships	$ 1	$ 1	$ 1	$ 1
Net income (loss)	$ 5	$ 3	$ 7	$ 4
HOST HOTELS & RESORTS L.P.
Minority Interest [Line Items]
OP units conversion basis			One common OP unit may be exchanged into 1.021494 shares of Host Inc
Shares issuable upon conversion of one OP unit	1.021494		1.021494		1.021494