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Capital Stock and Stock-Based Awards (Details) - Schedule of stock option activity for the Class A Stock and Common Stock plans - May. 31, 2015 - USD ($)
$ / shares in Units, $ in Millions
Total
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]  
Outstanding (shares) at May 31, 2013 4,355,367
Granted (Shares) 630,225
Exercised (Shares) (876,410)
Expired (Shares) (3,500)
Cancellations and forfeitures (Shares) (51,556)
Outstanding (Shares) at May 31, 2014 4,054,126
Exercisable (Shares) at May 31, 2014 2,888,567
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]  
Outstanding at May 31, 2012 (in Dollars per share) $ 30.23
Granted (in Dollars per share) 33.82
Exercised (in Dollars per share) 30.83
Expired (in Dollars per share) 38.35
Cancellations and forfeitures (in Dollars per share) 32.10
Outstanding at May 31, 2013 (in Dollars per share) 30.63
Weighted Average Exercise Price, Exercisable at May 31, 2014 (in Dollars per share) $ 30.22
Average Remaining Contractual Term (in years), Outstanding at May 31, 2014 4 years 9 months 21 days
Average Remaining Contractual Term (in years), Exercisable at May 31, 2014 3 years 8 months 15 days
Aggregate Intrinsic Value, Outstanding at May 31, 2014 (in Dollars) $ 56.0
Aggregate Intrinsic Value, Exercisable at May 31, 2014 (in Dollars) $ 41.1