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		9 Months Ended		3 Months Ended	9 Months Ended
	Sep. 07, 2012 HOST HOTELS & RESORTS, INC.	Sep. 30, 2013 HOST HOTELS & RESORTS, INC.	Sep. 30, 2013 HOST HOTELS & RESORTS, INC. Sales Agency Financing Agreement Twenty Twelve	Sep. 30, 2013 HOST HOTELS & RESORTS, INC. Sales Agency Financing Agreement Twenty Twelve	Sep. 30, 2013 HOST HOTELS & RESORTS, INC.	Sep. 30, 2013 HOST HOTELS & RESORTS L.P.	Dec. 31, 2012 HOST HOTELS & RESORTS L.P.	Sep. 30, 2013 HOST HOTELS & RESORTS L.P. Sales Agency Financing Agreement Twenty Twelve	Sep. 30, 2013 HOST HOTELS & RESORTS L.P. Sales Agency Financing Agreement Twenty Twelve
Stockholders Equity Note [Line Items]
Percentage of the common OP Units		98.70%			1.30%
Shares issuable upon conversion of one OP unit						1.021494	1.021494
Common stock issued, shares			6,000,000	16,900,000
Average price per share for stock issued			$ 18.39	$ 17.78
Issuance of common stock	$ 255	$ 303	$ 109	$ 297
Common OP units issued, units								5,900,000	16,500,000
Dividend declaration date		Sep. 16, 2013
Dividend per share, declared		$ 0.12
Dividend payable date		Oct. 15, 2013
Dividend record date		Sep. 30, 2013
Common OP units, distribution paid						$ 0.12257928