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Retirement Plans	12 Months Ended
Retirement Plans	May 31, 2017
Retirement Benefits [Abstract]
RETIREMENT PLANS	RETIREMENT PLANS The Company has a 401(k) plan under which eligible employees can defer a portion of their compensation, part of which is matched by the Company. Matching contributions were $4.2 million, $3.7 million and $3.7 million in 2017, 2016 and 2015, respectively. There are also various immaterial foreign retirement plans.