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Earnings (Loss) Per Share (Tables) | 9 Months Ended
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Feb. 28, 2018
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 periods indicated:
| Three months ended February 28, | Nine months ended February 28,
| 2018 |  | 2017 | 2018 |  | 2017
Earnings (loss) from continuing operations attributable to Class A and Common Shares | $ | (49.2 | ) |  | $ | (15.5 | ) | $ | (55.8 | ) |  | $ | 12.9 |
Earnings (loss) from discontinued operations attributable to Class A and Common Shares, net of tax | — |  |  | 0.1 |  | — |  |  | 0.0 |
Net income (loss) attributable to Class A and Common Shares | $ | (49.2 | ) |  | $ | (15.4 | ) | $ | (55.8 | ) |  | $ | 12.9 |
Weighted average Shares of Class A Stock and Common Stock outstanding for basic earnings (loss) per share (in millions) | 34.9 |  |  | 34.8 |  | 35.1 |  |  | 34.6 |
Dilutive effect of Class A Stock and Common Stock potentially issuable pursuant to stock-based compensation plans (in millions) | — |  |  | — |  | — |  |  | 0.7 |
Adjusted weighted average Shares of Class A Stock and Common Stock outstanding for diluted earnings (loss) per share (in millions) | 34.9 |  |  | 34.8 |  | 35.1 |  |  | 35.3 |
Earnings (loss) per share of Class A Stock and Common Stock: |  |  |  |  |  |  |  |  |  |
Basic earnings (loss) per share: |  |  |  |  |  |  |  |  |  |
Earnings (loss) from continuing operations | $ | (1.41 | ) |  | $ | (0.45 | ) | $ | (1.59 | ) |  | $ | 0.37 |
Earnings (loss) from discontinued operations, net of tax | $ | — |  |  | $ | 0.01 |  | $ | — |  |  | $ | 0.00 |
Net income (loss) | $ | (1.41 | ) |  | $ | (0.44 | ) | $ | (1.59 | ) |  | $ | 0.37 |
Diluted earnings (loss) per share: |  |  |  |  |  |  |  |  |  |
Earnings (loss) from continuing operations | $ | (1.41 | ) |  | $ | (0.45 | ) | $ | (1.59 | ) |  | $ | 0.36 |
Earnings (loss) from discontinued operations, net of tax | $ | — |  |  | $ | 0.01 |  | $ | — |  |  | $ | 0.00 |
Net income (loss) | $ | (1.41 | ) |  | $ | (0.44 | ) | $ | (1.59 | ) |  | $ | 0.36 |
Schedule of stock option activity | The following table sets forth Options outstanding pursuant to stock-based compensation plans as of the dates indicated:
| February 28, 2018 |  | February 28, 2017
Options outstanding pursuant to stock-based compensation plans (in millions) | 3.1 |  | 2.9

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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 for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + 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 (d) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 3: 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=96867065&loc=d3e5070-113901 + Details
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