Summary of Unaudited Consolidated Pro Forma Results of Operations (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2013	Sep. 07, 2012	Sep. 07, 2012	Sep. 30, 2013
Business Acquisition, Pro Forma Information [Abstract]
Revenues	$ 1,223	$ 1,164	$ 3,425	$ 3,881
Income (loss) from continuing operations	2	(39)	(16)	157
Net income (loss)	18	(35)	47	202
HOST HOTELS & RESORTS, INC.
Business Acquisition, Pro Forma Information [Abstract]
Net income (loss) attributable to Host Inc.	19	(33)	45	197
Basic earnings (loss) per common share:
Continuing operations	$ 0.01	$ (0.05)	$ (0.02)	$ 0.21
Discontinued operations	$ 0.02		$ 0.08	$ 0.06
Basic earnings (loss) per common share	$ 0.03	$ (0.05)	$ 0.06	$ 0.27
Diluted earnings (loss) per common share:
Continuing operations	$ 0.01	$ (0.05)	$ (0.02)	$ 0.20
Discontinued operations	$ 0.02		$ 0.08	$ 0.06
Diluted earnings (loss) per common share	$ 0.03	$ (0.05)	$ 0.06	$ 0.26
HOST HOTELS & RESORTS L.P.
Business Acquisition, Pro Forma Information [Abstract]
Net income (loss) attributable to Host Inc.	$ 19	$ (34)	$ 46	$ 200
Basic earnings (loss) per common unit:
Continuing operations	0.01	(0.05)	(0.03)	0.21
Discontinued operations	0.02		0.09	0.06
Basic earnings (loss) per common unit	0.03	(0.05)	0.06	0.27
Diluted earnings (loss) per common unit:
Continuing operations	0.01	(0.05)	(0.03)	0.21
Discontinued operations	0.02		0.09	0.06
Diluted earnings (loss) per common unit	0.03	(0.05)	0.06	0.27

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(2)-(3)

-URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463

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