(Loss) Per Share of Common Stock - Reconciliation of Numerator and Denominator for Basic and Diluted Earnings (loss) Per Share Calculation (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended
		Dec. 31, 2021	Dec. 31, 2020
Earnings Per Share [Abstract]
Net income (loss) available to common stockholders		$ (12.8)	$ (12.0)
Weighted average number of common shares outstanding – basic		105,259,000	105,148,000
Basic and diluted (loss) per share		$ (0.12)	$ (0.11)
Weighted average number of anti-dilutive options and restricted stock	[1]	4,026,000	6,799,000

[1] Weighted average number of anti-dilutive options is based upon the average closing price of the Company’s common stock on the NYSE for the period.