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, 2018 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding (shares) at May 31, 2015 | shares	2,693,824
Granted (Shares) | shares	717,851
Exercised (Shares) | shares	(526,508)
Expired, cancellations and forfeitures (Shares) | shares	(63,041)
Outstanding (Shares) at May 31, 2016 | shares	2,822,126
Exercisable (Shares) at May 31, 2016 | shares	1,514,248
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	$ 33.81
Granted (in Dollars per share) | $ / shares	38.79
Exercised (in Dollars per share) | $ / shares	30.60
Expired, cancellations and forfeitures (in Dollars per share) | $ / shares	40.89
Outstanding at May 31, 2016 (in Dollars per share) | $ / shares	35.52
Weighted Average Exercise Price, Exercisable at May 31, 2014 (in Dollars per share) | $ / shares	$ 32.33
Average Remaining Contractual Term (in years), Outstanding at May 31, 2016	6 years 9 months 8 days
Average Remaining Contractual Term (in years), Exercisable at May 31, 2016	5 years 3 months
Aggregate Intrinsic Value, Outstanding at May 31, 2016 (in Dollars) | $	$ 26.8
Aggregate Intrinsic Value, Exercisable at May 31, 2016 (in Dollars) | $	$ 19.2