Summary of Unaudited Consolidated Pro Forma Results of Operations (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Business Acquisition, Pro Forma Information [Line Items]
Revenues	$ 5,339	$ 5,083
Income from continuing operations	34	31
Net income	84	25
HOST HOTELS & RESORTS, INC.
Business Acquisition, Pro Forma Information [Line Items]
Net income attributable to reporting entity	82	26
Basic earnings (loss) per common share:
Continuing operations	$ 0.04	$ 0.05
Discontinued operations	$ 0.07	$ (0.01)
Basic earnings per common share	$ 0.11	$ 0.04
Diluted earnings (loss) per common share:
Continuing operations	$ 0.04	$ 0.05
Discontinued operations	$ 0.07	$ (0.01)
Diluted earnings per common share	$ 0.11	$ 0.04
HOST HOTELS & RESORTS L.P.
Business Acquisition, Pro Forma Information [Line Items]
Net income attributable to reporting entity	$ 83	$ 26
Basic earnings (loss) per common unit:
Continuing operations	0.05	0.05
Discontinued operations	0.07	(0.01)
Basic earnings per common unit	0.12	0.04
Diluted earnings (loss) per common unit:
Continuing operations	0.05	0.05
Discontinued operations	0.07	(0.01)
Diluted earnings per common unit	0.12	0.04

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