Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Millions		3 Months Ended
		Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net (loss)		$ (18.9)	$ (12.8)
Net derivative gain and other costs arising during the period, net of tax expense of $0.0 and $0.3, respectively	[1]	0.0	1.0
Reclassification of (gains) into net (loss), net of tax (expense) of $(0.6) and $(0.2), respectively		(2.4)	(0.5)
Other comprehensive (loss) income		(2.4)	0.5
Comprehensive (loss)		$ (21.3)	$ (12.3)

[1] Other costs include the effects of foreign currency translation adjustments which were immaterial during the periods presented.