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Common Stock and Per Share Information (Tables) | 12 Months Ended
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May 31, 2014
Earnings Per Share [Abstract] |
Schedule of Calculation of Numerator and Denominator in Earnings Per Share | The following table reconciles the numerators and denominators used in the calculations of basic and diluted EPS for each of the last three fiscal years:
(In millions, except shares) | 2014 |  | 2013 |  | 2012
Numerator: |  |  |  |  |
Numerator for both basic and diluted EPS, net earnings (loss) | $ | (22.1 | ) |  | $ | 68.2 |  |  | $ | 75.2 |
Denominator: |  |  |  |  |
Denominator for basic EPS, weighted-average common shares outstanding | 58,955,487 |  |  | 58,425,522 |  |  | 58,171,472 |
Potentially dilutive shares resulting from stock plans | — |  |  | 418,992 |  |  | 285,404 |
Denominator for diluted EPS | 58,955,487 |  |  | 58,844,514 |  |  | 58,456,876 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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