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Earnings Per Share (Tables) | 9 Months Ended
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Feb. 28, 2015
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 earnings per share (EPS).
| Three Months Ended | Nine Months Ended
| February 28, 2015 |  | March 1, 2014 | February 28, 2015 |  | March 1, 2014
Numerators: |  |  |  |  |  |
Numerator for both basic and diluted EPS, net earnings - in millions | $ | 21.0 |  |  | $ | 19.4 |  | $ | 74.1 |  |  | $ | (38.7 | )
Denominators: |  |  |  |  |  |
Denominator for basic EPS, weighted-average common shares outstanding | 59,550,289 |  |  | 59,014,789 |  | 59,430,575 |  |  | 58,888,514 |
Potentially dilutive shares resulting from stock plans | 547,900 |  |  | 638,628 |  | 566,292 |  |  | — |
Denominator for diluted EPS | 60,098,189 |  |  | 59,653,417 |  | 59,996,867 |  |  | 58,888,514 |
Antidilutive equity awards not included in weighted-average common shares - diluted | 676,405 |  |  | 780,800 |  | 703,364 |  |  | 2,782,663 |

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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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