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EARNINGS PER COMMON SHARE (Tables) | 12 Months Ended
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Sep. 30, 2024
Earnings Per Share [Abstract] |
Information to Calculate Basic and Diluted Earnings (Loss) Per Common Share | The following table presents information necessary to calculate basic and diluted net loss per Common Share for the periods indicated:
| Year Ended September 30,
| 2024 |  | 2023 |  | 2022
Net loss | $ | (34.9) |  |  | $ | (380.1) |  |  | $ | (437.5) |
Basic net loss per common share: |  |  |  |  |
Weighted-average common shares outstanding during the period | 56.8 |  |  | 56.0 |  |  | 55.5 |
Basic net loss per common share | $ | (0.61) |  |  | $ | (6.79) |  |  | $ | (7.88) |
Diluted net loss per common share: |  |  |  |  |
Weighted-average common shares outstanding during the period | 56.8 |  |  | 56.0 |  |  | 55.5 |
Dilutive potential common shares | — |  |  | — |  |  | — |
Weighted-average number of common shares outstanding and dilutive potential common shares | 56.8 |  |  | 56.0 |  |  | 55.5 |
Diluted net loss per common share | $ | (0.61) |  |  | $ | (6.79) |  |  | $ | (7.88) |
Antidilutive stock options outstanding | 0.4 |  |  | 0.4 |  |  | 0.2 |

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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/2009/role/commonPracticeRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
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