Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Statement of Comprehensive Income [Abstract]
Net Income (Loss)		$ 32.3	$ 23.5	$ 28.3	$ 40.8
Net derivative (losses) gains and other costs arising during the period, net of tax (benefit) expense of $(0.7); $0.8; $1.3; and $0.0, respectively	[1]	(1.9)	2.5	3.9	(0.2)
Reclassification of (gains) into net income, net of tax (expense) of $(0.3); $(0.8); $(1.1); and $(2.3), respectively		(1.0)	(2.1)	(3.0)	(6.2)
Other comprehensive (loss) income		(2.9)	0.4	0.9	(6.4)
Comprehensive income		$ 29.4	$ 23.9	$ 29.2	$ 34.4

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