Retirement Plans (Tables)

9 Months Ended

Jun. 30, 2021

Retirement Benefits [Abstract]

Schedule of Net Periodic Pension and Postretirement Cost (Benefit)

The Company’s net periodic pension and postretirement costs for these plans for the third quarter and nine months ended June 30 were as follows:

	Three Months Ended June 30,				Nine Months Ended June 30,
	2021		2020		2021		2020
Service cost	$	1.1	$	1.1	$	3.3	$	3.2
Interest cost	2.5		3.4		7.4		10.3
Expected return on plan assets	(5.6)		(5.8)		(16.8)		(17.3)
Recognized net actuarial loss	2.3		2.2		6.9		6.8
Settlement loss recognized	—		0.3		—		0.7
Net periodic cost	$	0.3	$	1.2	$	0.8	$	3.7