Retirement Plans (Tables)

9 Months Ended

Jun. 30, 2025

Retirement Benefits [Abstract]

Schedule of Net Periodic Pension and Postretirement Cost (Benefit)

The Company’s net periodic pension and postretirement costs for its material plans were as follows:

	Three Months Ended June 30,				Nine Months Ended June 30,
	2025		2024		2025		2024
Service cost	$	0.7	$	0.5	$	1.9	$	1.4
Interest cost	4.6		5.3		13.6		16.0
Expected return on plan assets	(5.5)		(4.9)		(16.2)		(14.6)
Recognized net actuarial loss	0.6		0.4		1.8		1.1
Net periodic cost	$	0.4	$	1.3	$	1.1	$	3.9