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Retirement Plans	12 Months Ended
Retirement Plans	May 31, 2016
Compensation and Retirement Disclosure [Abstract]
RETIREMENT PLANS	RETIREMENT PLANS We have a 401(k) plan under which eligible employees can defer a portion of their compensation, part of which is matched by us. Matching contributions were $3.7 million, $3.7 million and $2.8 million in 2016, 2015 and 2014, respectively. There are also various immaterial foreign retirement plans.