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Earnings (Loss) Per Share (Tables) | 9 Months Ended
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Feb. 29, 2016
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 three month and nine month periods ended February 29, 2016 and February 28, 2015, respectively:
| Three months ended |  | Nine months ended
| February 29, |  | February 28, |  | February 29, |  | February 28,
| 2016 |  | 2015 |  | 2016 |  | 2015
Earnings (loss) from continuing operations attributable to Class A and Common Shares | $ | (7.2 | ) |  | $ | (15.7 | ) |  | $ | 9.1 |  |  | $ | (2.0 | )
Earnings (loss) from discontinued operations attributable to Class A and Common Shares, net of tax | (1.8 | ) |  | (6.4 | ) |  | (2.6 | ) |  | 14.3 |
Net income (loss) attributable to Class A and Common Shares | $ | (9.0 | ) |  | $ | (22.1 | ) |  | $ | 6.5 |  |  | $ | 12.3 |
Weighted average Shares of Class A Stock and Common Stock outstanding for basic earnings (loss) per share (in millions) | 34.3 |  |  | 32.7 |  |  | 34.0 |  |  | 32.6 |
Dilutive effect of Class A Stock and Common Stock potentially issuable pursuant to stock-based compensation plans (in millions) | — |  |  | — |  |  | 0.9 |  |  | 0.6 |
Adjusted weighted average Shares of Class A Stock and Common Stock outstanding for diluted earnings (loss) per share (in millions) | 34.3 |  |  | 32.7 |  |  | 34.9 |  |  | 33.2 |
Earnings (loss) per share of Class A Stock and Common Stock: |  |  |  |  |  |  |  |  |  |  |
Basic earnings (loss) per share: |  |  |  |  |  |  |  |  |  |  |
Earnings (loss) from continuing operations | $ | (0.21 | ) |  | $ | (0.48 | ) |  | $ | 0.27 |  |  | $ | (0.06 | )
Earnings (loss) from discontinued operations, net of tax | $ | (0.05 | ) |  | $ | (0.20 | ) |  | $ | (0.08 | ) |  | $ | 0.44 |
Net income (loss) | $ | (0.26 | ) |  | $ | (0.68 | ) |  | $ | 0.19 |  |  | $ | 0.38 |
Diluted earnings (loss) per share: |  |  |  |  |  |  |  |  |  |  |
Earnings (loss) from continuing operations | $ | (0.21 | ) |  | $ | (0.48 | ) |  | $ | 0.26 |  |  | $ | (0.06 | )
Earnings (loss) from discontinued operations, net of tax | $ | (0.05 | ) |  | $ | (0.20 | ) |  | $ | (0.07 | ) |  | $ | 0.43 |
Net income (loss) | $ | (0.26 | ) |  | $ | (0.68 | ) |  | $ | 0.19 |  |  | $ | 0.37 |
Schedule of stock option activity | The following table sets forth Options outstanding pursuant to stock-based compensation plans as of the dates indicated:
| February 29, 2016 |  | February 28, 2015
Options outstanding pursuant to stock-based compensation plans (in millions) | 3.4 |  | 4.4

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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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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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