Equity of Host Inc. and Capital of Host L.P. - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	9 Months Ended		3 Months Ended	9 Months Ended	1 Months Ended	9 Months Ended
	Sep. 09, 2011 HOST HOTELS & RESORTS, INC.	Sep. 10, 2010 HOST HOTELS & RESORTS, INC.	Sep. 09, 2011 HOST HOTELS & RESORTS, INC. 2011 Sales Agency Financing Agreement	Sep. 09, 2011 HOST HOTELS & RESORTS, INC. 2011 Sales Agency Financing Agreement	Apr. 21, 2011 HOST HOTELS & RESORTS, INC. 2011 Sales Agency Financing Agreement Upper Limit	Sep. 09, 2011 HOST HOTELS & RESORTS L.P.	Dec. 31, 2010 HOST HOTELS & RESORTS L.P.	Sep. 09, 2011 Limited Partner
Stockholders Equity Note [Line Items]
Percentage of the common OP Units	98.50%							1.50%
Shares issuable upon conversion of one OP unit						1.021494	1.021494	1.021494
Aggregate common stock offering price value					$ 400
Common stock issued			50,000	16,700,000
Average price per share for stock issued			$ 16.61	$ 17.44
Common stock issuance	$ 289	$ 158	$ 1	$ 289
Declaration Date	Sep. 17, 2011
Dividend per share, declared	$ 0.04
Payment Date	Oct. 17, 2011
Record Date	Sep. 30, 2011
Common OP units, distribution paid						$ 0.04085976