Retirement Plans (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Retirement Benefits [Abstract]
Service cost	$ 0.5	$ 0.6
Interest cost	4.5	4.5
Expected return on plan assets	(5.9)	(5.4)
Recognized net actuarial loss	0.7	0.6
Net periodic (benefit) cost	$ (0.2)	$ 0.3