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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
$ / shares in Units, $ in Millions
 12 Months Ended
May 31, 2016
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]  
Outstanding (shares) at May 31, 2015 | shares 4,054,126
Granted (Shares) | shares 474,819
Exercised (Shares) | shares (1,476,520)
Expired, cancellations and forfeitures (Shares) | shares (27,379)
Outstanding (Shares) at May 31, 2016 | shares 3,025,046
Exercisable (Shares) at May 31, 2016 | shares 1,859,238
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]  
Outstanding at May 31, 2015 (in Dollars per share) | $ / shares $ 30.63
Granted (in Dollars per share) | $ / shares 43.09
Exercised (in Dollars per share) | $ / shares 31.50
Expired, cancellations and forfeitures (in Dollars per share) | $ / shares 38.11
Outstanding at May 31, 2016 (in Dollars per share) | $ / shares 32.10
Weighted Average Exercise Price, Exercisable at May 31, 2014 (in Dollars per share) | $ / shares $ 29.37
Average Remaining Contractual Term (in years), Outstanding at May 31, 2016 5 years 10 months 25 days
Average Remaining Contractual Term (in years), Exercisable at May 31, 2016 4 years 3 months 20 days
Aggregate Intrinsic Value, Outstanding at May 31, 2016 (in Dollars) | $ $ 23.0
Aggregate Intrinsic Value, Exercisable at May 31, 2016 (in Dollars) | $ $ 18.0