Non-controlling Interests - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended						3 Months Ended		12 Months Ended
	Sep. 09, 2011 HOST HOTELS & RESORTS, INC. Entity	Sep. 10, 2010 HOST HOTELS & RESORTS, INC.	Sep. 10, 2010 HOST HOTELS & RESORTS, INC.	Dec. 31, 2010 HOST HOTELS & RESORTS, INC.	Sep. 09, 2011 HOST HOTELS & RESORTS, INC. Lower Limit Year	Sep. 09, 2011 HOST HOTELS & RESORTS, INC. Upper Limit Year	Sep. 09, 2011 HOST HOTELS & RESORTS, INC. Estimate of Fair Value, Fair Value Disclosure	Dec. 31, 2010 HOST HOTELS & RESORTS, INC. Estimate of Fair Value, Fair Value Disclosure	Sep. 09, 2011 HOST HOTELS & RESORTS L.P.	Sep. 10, 2010 HOST HOTELS & RESORTS L.P.	Dec. 31, 2010 HOST HOTELS & RESORTS L.P.
Noncontrolling Interest [Line Items]
Number of majority-owned partnerships that have third-party, non-controlling ownership interests that have been consolidated	5
Number of majority-owned partnerships that have third-party, non-controlling ownership interests with finite lives	3
Non-controlling interests in outside partnerships	$ 38			$ 29			$ 62	$ 65
Majority-owned partnerships with manditorily redeemable non-controlling interests, finite life (years)					99	100
Majority-owned partnerships with manditorily redeemable non-controlling interests, termination year					2081	2095
Less: Net loss attributable to non-controlling interests	(2)	(3)	(2)						(1)	(2)
OP units conversion basis											One OP unit may now be exchanged into 1.021494 shares of Host Inc. common stock
Shares issuable upon conversion of one OP unit									1.021494		1.021494
Amounts attributable to outside partners of Host LP	$ (1)	$ (1)	$ (2)