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EARNINGS PER COMMON SHARE
 12 Months Ended
Sep. 30, 2023
Earnings Per Share [Abstract]  
EARNINGS PER COMMON SHARE EARNINGS PER COMMON SHARE
The following table presents information necessary to calculate basic and diluted income per Common Share.
 Year Ended September 30,
 202320222021
Income (loss) from continuing operations$(380.1)$(437.5)$517.3 
Net income attributable to noncontrolling interest— — (0.9)
Income (loss) attributable to controlling interest from continuing operations(380.1)(437.5)516.4 
Loss from discontinued operations, net of tax— — (3.9)
Net income (loss) attributable to controlling interest$(380.1)$(437.5)$512.5 
Basic income (loss) per common share:
Weighted-average common shares outstanding
during the period		56.0 55.5 55.7 
Income (loss) from continuing operations$(6.79)$(7.88)$9.27 
Loss from discontinued operations— — (0.07)
Basic net income (loss) per common share$(6.79)$(7.88)$9.20 
Diluted income (loss) per common share:
Weighted-average common shares outstanding
during the period		56.0 55.5 55.7 
Dilutive potential common shares— — 1.5 
Weighted-average number of common shares outstanding and dilutive potential common shares56.0 55.5 57.2 
Income (loss) from continuing operations$(6.79)$(7.88)$9.03 
Loss from discontinued operations— — (0.07)
Diluted net income (loss) per common share$(6.79)$(7.88)$8.96 
Antidilutive stock options outstanding0.4 0.2 0.1 
Diluted average common shares used in the diluted loss per common share calculation for fiscal 2023 and fiscal 2022 were 56.0 million and 55.5 million, respectively, which excluded potential Common Shares of 0.4 million and 0.6 million, respectively, because the effect of their inclusion would be anti-dilutive as the Company incurred a net loss for fiscal 2023 and 2022.