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, 2017 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding (shares) at May 31, 2015 | shares	3,025,046
Granted (Shares) | shares	522,761
Exercised (Shares) | shares	(833,046)
Expired, cancellations and forfeitures (Shares) | shares	(20,937)
Outstanding (Shares) at May 31, 2016 | shares	2,693,824
Exercisable (Shares) at May 31, 2016 | shares	1,446,554
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	$ 32.10
Granted (in Dollars per share) | $ / shares	39.39
Exercised (in Dollars per share) | $ / shares	30.97
Expired, cancellations and forfeitures (in Dollars per share) | $ / shares	38.68
Outstanding at May 31, 2016 (in Dollars per share) | $ / shares	33.81
Weighted Average Exercise Price, Exercisable at May 31, 2014 (in Dollars per share) | $ / shares	$ 30.14
Average Remaining Contractual Term (in years), Outstanding at May 31, 2016	6 years 4 months
Average Remaining Contractual Term (in years), Exercisable at May 31, 2016	4 years 7 months 22 days
Aggregate Intrinsic Value, Outstanding at May 31, 2016 (in Dollars) | $	$ 24.0
Aggregate Intrinsic Value, Exercisable at May 31, 2016 (in Dollars) | $	$ 18.0