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Reconciliation of the Earnings (Losses) and Number of Shares Used in Calculations of Basic and Diluted Earnings Per Share Attributable to Marriott Shareholders (Detail) (USD $)
In Millions, except Per Share data, unless otherwise specified
12 Months Ended
Dec. 30, 2011
Dec. 31, 2010
Jan. 01, 2010
Computation of Basic Earnings Per Share Attributable to Marriott Shareholders      
Net income (loss) (in dollars) $ 198 $ 458 $ (353)
Net losses attributable to noncontrolling interests 0 0 7
Net income (loss) attributable to Marriott shareholders (in dollars) 198 458 (346)
Weighted average shares outstanding 350.1 362.8 356.4
Basic earnings (losses) per share attributable to Marriott shareholders (in USD per share) $ 0.56 $ 1.26 $ (0.97)
Computation of Diluted Earnings Per Share Attributable to Marriott Shareholders      
Net income (loss) attributable to Marriott shareholders (in dollars) $ 198 $ 458 $ (346)
Weighted average shares outstanding 350.1 362.8 356.4
Effect of dilutive securities      
Shares for diluted earnings per share 362.3 378.3 356.4
Diluted earnings (losses) per share attributable to Marriott shareholders (in USD per share) $ 0.55 $ 1.21 $ (0.97)
Stock Option Program and Stock Appreciation Right Program
     
Effect of dilutive securities      
Effect of dilutive securities 8.0 11.0 0
Deferred Stock Incentive
     
Effect of dilutive securities      
Effect of dilutive securities 0.9 1.1 0
Restricted Stock Units
     
Effect of dilutive securities      
Effect of dilutive securities 3.3 3.4 0