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Earnings Per Share
6 Months Ended
Mar. 31, 2012
Earnings Per Share Disclosure [Abstract]  
Earnings Per Share [Text Block]
         
  Quarter Ended  Six Months Ended
Common Shares Outstanding and Anti-Dilutive Common Shares March 31, March 31,
(in millions) 2012 2011 2012 2011
Weighted average common shares outstanding, basic  537.5  594.4  544.1  599.0
Dilutive effect of equity-based compensation awards  6.9  6.7  6.7  5.6
         
Weighted average common shares outstanding, diluted  544.4  601.1  550.8  604.6
         
Anti-dilutive common shares   9.8  17.2  13.6  22.6
         
Earnings Per Share Policy Text Block

NOTE 2. EARNINGS PER SHARE

Basic earnings per common share excludes potentially dilutive securities and is computed by dividing Net earnings attributable to Viacom by the weighted average number of common shares outstanding during the period. The determination of diluted earnings per common share includes the potential dilutive effect of equity-based compensation awards based upon the application of the treasury stock method. Anti-dilutive common shares were excluded from the calculation of diluted earnings per common share.

The following table sets forth the computation of the common shares outstanding used in determining basic and diluted earnings per common share and anti-dilutive shares: