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Treasury Stock (Tables) | 6 Months Ended
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Nov. 30, 2015
Stockholders' Equity Attributable to Parent [Abstract] |
Tabular Disclosure of an Entity's Treasury Stock | The Board of Directors (the "Board") has authorized the Company to repurchase Common Stock, from time to time as conditions allow, on the open market or through negotiated private transactions. The table below represents the remaining Board authorization:
Board Authorization | Amount |
September 2010 | $ | 44.0 |  | (a)
Additional authorization July 2015 | 50.0 |  |
Less repurchases made under the authorization as of September 2010 | (34.1 | ) |
Remaining Board authorization at November 30, 2015 | $ | 59.9 |  |

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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 + References No definition available. + Details
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