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Subsequent Events	12 Months Ended
Subsequent Events	May. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTS On July 22, 2015, the Board of Directors declared a regular cash dividend of $0.150 per Class A and Common share in respect of the first quarter of fiscal 2016. The dividend is payable on September 15, 2015 to shareholders of record on August 31, 2015. On July 22, 2015, the Board of Directors authorized an additional $50.0 for the share buy-back program, to be funded with available cash, pursuant to which the Company may purchase Common shares from time to time, as conditions allow, on the open market or in negotiated private transactions. Accordingly, as of the date of this Report, approximately $59.9 is available for future purchases of Common shares under the current authorization of the Board of Directors. The actual number of shares to be purchased and the timing and pricing of any purchases under the share repurchase program will depend on future market conditions and upon potential alternative uses for the Company's available cash. There is no assurance that any shares will be purchased under the share repurchase program and the Company may elect to modify, suspend or discontinue the program at any time without prior notice. Any common stock acquired through the share repurchase program will be held as treasury shares and may be used for general corporate purposes.