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Treasury Stock (Tables)

12 Months Ended

May 31, 2017

Stockholders' Equity Attributable to Parent [Abstract]

Tabular disclosure of entity's treasury stock

The Company has authorizations from the Board of Directors to repurchase Common Stock, from time to time as conditions allow, on the open market or through negotiated private transactions, as summarized in the table below:

Authorization	Amount
July 2015	50.0
Less repurchases made under the authorization as of May 31, 2017	(11.4		)
Remaining Board authorization at May 31, 2017	$	38.6

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- Definition

Tabular disclosure of an entity's treasury stock including amount authorized by an entity's board of directors, the number of shares repurchased and the remaining maximum dollar value of shares available for repurchase under the program

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