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, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Business Acquisition, Pro Forma Information [Abstract]
Revenues	$ 1,295	$ 1,215	$ 4,042	$ 3,843
Income from continuing operations	145	3	492	154
Net income	145	19	492	201
HOST HOTELS & RESORTS, INC.
Business Acquisition, Pro Forma Information [Abstract]
Net income attributable to Host Inc.	144	20	481	196
Basic earnings per common share:
Continuing operations	$ 0.19	$ 0.01	$ 0.64	$ 0.20
Discontinued operations		$ 0.02		$ 0.06
Basic earnings per common share	$ 0.19	$ 0.03	$ 0.64	$ 0.26
Diluted earnings per common share:
Continuing operations	$ 0.19	$ 0.01	$ 0.64	$ 0.20
Discontinued operations		$ 0.02		$ 0.06
Diluted earnings per common share	$ 0.19	$ 0.03	$ 0.64	$ 0.26
Basic earnings per common unit:
Continuing operations	$ 0.19	$ 0.01	$ 0.64	$ 0.20
Basic earnings per common share	$ 0.19	$ 0.03	$ 0.64	$ 0.26
Diluted earnings per common unit:
Continuing operations	$ 0.19	$ 0.01	$ 0.64	$ 0.20
Diluted earnings per common share	$ 0.19	$ 0.03	$ 0.64	$ 0.26
HOST HOTELS & RESORTS L.P.
Business Acquisition, Pro Forma Information [Abstract]
Net income attributable to Host Inc.	$ 146	$ 20	$ 488	$ 199
Basic earnings per common share:
Continuing operations	$ 0.19	$ 0.01	$ 0.65	$ 0.21
Basic earnings per common share	$ 0.19	$ 0.03	$ 0.65	$ 0.27
Diluted earnings per common share:
Continuing operations	$ 0.19	$ 0.01	$ 0.65	$ 0.21
Diluted earnings per common share	$ 0.19	$ 0.03	$ 0.65	$ 0.27
Basic earnings per common unit:
Continuing operations	$ 0.19	$ 0.01	$ 0.65	$ 0.21
Discontinued operations		$ 0.02		$ 0.06
Basic earnings per common share	$ 0.19	$ 0.03	$ 0.65	$ 0.27
Diluted earnings per common unit:
Continuing operations	$ 0.19	$ 0.01	$ 0.65	$ 0.21
Discontinued operations		$ 0.02		$ 0.06
Diluted earnings per common share	$ 0.19	$ 0.03	$ 0.65	$ 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)

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