Equity of Host Inc. and Capital of Host L.P. - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	6 Months Ended			1 Months Ended	6 Months Ended
	Jun. 17, 2011 HOST HOTELS & RESORTS, INC.	Jun. 18, 2010 HOST HOTELS & RESORTS, INC.	Jun. 17, 2011 HOST HOTELS & RESORTS, INC. 2011 Sales Agency Financing Agreement	Apr. 21, 2011 HOST HOTELS & RESORTS, INC. 2011 Sales Agency Financing Agreement Upper Limit	Jun. 17, 2011 HOST HOTELS & RESORTS L.P.	Dec. 31, 2010 HOST HOTELS & RESORTS L.P.	Jun. 17, 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			11,000,000
Average price per share for stock issued			$ 17.29
Common stock issuance	$ 288	$ 55	$ 189
Declaration Date	Jun. 15, 2011
Dividend per share, declared	$ 0.03
Payment Date	Jul. 15, 2011
Record Date	Jun. 30, 2011
Common OP units, distribution paid					$ 0.03064482