Host Inc. Earnings (Loss) Per Common Share (Parenthetical) (Detail) (HOST HOTELS & RESORTS, INC.) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
HOST HOTELS & RESORTS, INC.
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]
Anti-dilutive shares which were not included in the computation of diluted EPS	40	47	53

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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-Name Accounting Standards Codification

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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