Equity Allocation between Controlling and Non-Controlling Interests (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Stockholders Equity Note [Line Items]
Beginning Balance	$ 7,368
Net income attributable to Host L.P.	98	179
Net income attributable to non-controlling interests	5	4
Net income	1	2
Other comprehensive loss	(37)	7
Ending Balance	7,323
HOST HOTELS & RESORTS, INC.
Stockholders Equity Note [Line Items]
Beginning Balance	7,368
Net income	103
Issuance of common stock	10
Dividends declared on common stock	(151)
Other changes in ownership	30
Other comprehensive loss	(37)
Ending Balance	7,323
HOST HOTELS & RESORTS, INC. | Parent
Stockholders Equity Note [Line Items]
Beginning Balance	7,336
Net income attributable to Host L.P.	98
Issuance of common stock	10
Dividends declared on common stock	(151)
Other changes in ownership	33
Other comprehensive loss	(37)
Ending Balance	7,289
HOST HOTELS & RESORTS, INC. | Non-redeemable, non-controlling interest
Stockholders Equity Note [Line Items]
Beginning Balance	32
Net income attributable to non-controlling interests	5
Other changes in ownership	(3)
Ending Balance	34
HOST HOTELS & RESORTS, INC. | Redeemable non-controlling interests
Stockholders Equity Note [Line Items]
Beginning Balance	225
Net income	1
Distributions to non-controlling interests	(2)
Other changes in ownership	(33)
Ending Balance	$ 191