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Computation of Earnings Per Share
 9 Months Ended
Feb. 29, 2016
Earnings Per Share [Abstract]  
Computation of Earnings Per Share

(4) Computation of Earnings Per Share

 

The calculation of basic and diluted earnings per common share for the periods ended February 29, 2016 and February 28, 2015 was as follows (in millions, except per share amounts):

   Three Months Ended Nine Months Ended
   2016 2015 2016 2015
Basic earnings per common share:            
Net earnings allocable to common shares(1) $ 506 $ 626 $ 1,888 $ 1,941
Weighted-average common shares   272   283   278   284
Basic earnings per common share $ 1.86 $ 2.21 $ 6.79 $ 6.85
              
Diluted earnings per common share:            
Net earnings allocable to common shares(1) $ 506 $ 626 $ 1,888 $ 1,941
              
Weighted-average common shares   272   283   278   284
Dilutive effect of share-based awards   3   4   3   4
Weighted-average diluted shares   275   287   281   288
Diluted earnings per common share $ 1.84 $ 2.18 $ 6.71 $ 6.75
              
Anti-dilutive options excluded from diluted             
earnings per common share   4.8   2.0   4.0   2.1

(1) Net earnings available to participating securities were immaterial in all periods presented.