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Earnings (Loss) Per Share (Tables) | 12 Months Ended
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May. 31, 2015
Earnings Per Share [Abstract] |
Schedule of basic and diluted earnings per share | The following table summarizes the reconciliation of the numerators and denominators for the Basic and Diluted earnings (loss) per share computation for the fiscal years ended May 31:
| 2015 |  | 2014 |  | 2013
Earnings (loss) from continuing operations attributable to Class A and Common Shares | $ | 15.4 |  |  | $ | 13.2 |  |  | $ | 4.8 |
Earnings (loss) from discontinued operations attributable to Class A and Common Shares, net of tax | 279.1 |  |  | 31.1 |  |  | 26.2 |
Net income (loss) attributable to Class A and Common Shares | 294.5 |  |  | 44.3 |  |  | 31.0 |
Weighted average Shares of Class A Stock and Common Stock outstanding for basic earnings (loss) per share (in millions) | 32.7 |  |  | 32.0 |  |  | 31.8 |
Dilutive effect of Class A Stock and Common Stock potentially issuable pursuant to stock-based compensation plans (in millions) | 0.7 |  |  | 0.5 |  |  | 0.6 |
Adjusted weighted average Shares of Class A Stock and Common Stock outstanding for diluted earnings (loss) per share (in millions) | 33.4 |  |  | 32.5 |  |  | 32.4 |
Earnings (loss) per share of Class A Stock and Common Stock |  |  |  |  |
Basic earnings (loss) per share: |  |  |  |  |
Earnings (loss) from continuing operations | $ | 0.47 |  |  | $ | 0.42 |  |  | $ | 0.15 |
Earnings (loss) from discontinued operations, net of tax | $ | 8.53 |  |  | $ | 0.97 |  |  | $ | 0.82 |
Net income (loss) | $ | 9.00 |  |  | $ | 1.39 |  |  | $ | 0.97 |
Diluted earnings (loss) per share: |  |  |  |  |  |  |  |
Earnings (loss) from continuing operations | $ | 0.46 |  |  | $ | 0.41 |  |  | $ | 0.15 |
Earnings (loss) from discontinued operations, net of tax | $ | 8.34 |  |  | $ | 0.95 |  |  | $ | 0.80 |
Net income (loss) | $ | 8.80 |  |  | $ | 1.36 |  |  | $ | 0.95 |

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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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