Equity Allocation between Controlling and Non-Controlling Interests (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Stockholders Equity Note [Line Items]
Beginning Balance			$ 7,033
NET INCOME ATTRIBUTABLE TO REPORTING ENTITY	$ 210	$ 347	368	$ 529
Other comprehensive income	1	$ 23	6	$ 36
Ending Balance	7,141		7,141
HOST HOTELS & RESORTS, INC.
Stockholders Equity Note [Line Items]
Beginning Balance			7,033
Net income			369
Issuance of common stock for comprehensive stock plans			14
Dividends declared on common stock			(295)
Changes in ownership and other			14
Other comprehensive income			6
Ending Balance	7,141		7,141
HOST HOTELS & RESORTS, INC. | Parent
Stockholders Equity Note [Line Items]
Beginning Balance			6,994
NET INCOME ATTRIBUTABLE TO REPORTING ENTITY			368
Issuance of common stock for comprehensive stock plans			14
Dividends declared on common stock			(295)
Changes in ownership and other			15
Other comprehensive income			5
Ending Balance	7,101		7,101
HOST HOTELS & RESORTS, INC. | Non-redeemable, non-controlling interest
Stockholders Equity Note [Line Items]
Beginning Balance			39
Net income attributable to non-controlling interests			1
Changes in ownership and other			(1)
Other comprehensive income			1
Ending Balance	40		40
HOST HOTELS & RESORTS, INC. | Redeemable non-controlling interests
Stockholders Equity Note [Line Items]
Beginning Balance			165
Net income			4
Distributions to non-controlling interests			(3)
Changes in ownership and other			(10)
Ending Balance	$ 156		$ 156