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EARNINGS PER COMMON SHARE
 12 Months Ended
Sep. 30, 2024
Earnings Per Share [Abstract]  
EARNINGS PER COMMON SHARE EARNINGS 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,
 202420232022
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 shares56.8 56.0 55.5 
Diluted net loss per common share$(0.61)$(6.79)$(7.88)
Antidilutive stock options outstanding0.4 0.4 0.2 
Diluted average common shares used in the diluted loss per common share calculation for fiscal 2024, fiscal 2023 and fiscal 2022 were 56.8 million, 56.0 million and 55.5 million, respectively, which excluded potential common shares of 0.9 million, 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 2024, 2023 and 2022.