Retirement Plans (Tables)

3 Months Ended

Dec. 31, 2019

Defined Benefit Plan [Abstract]

Schedule of Net Periodic Benefit Cost

The components of net periodic benefit cost for our pension plans are presented below.

	Three months ended
	December 31,
	2019		2018
	(in millions)
Service cost	$	0.4	$	0.4
Pension costs (benefits) other than service:
Interest cost	2.8		3.5
Expected return on plan assets	(4.2)		(4.1)
Amortization of actuarial net loss	0.7		0.5
Pension costs (benefits) other than service	(0.7)		(0.1)
Net periodic (benefit) cost	$	(0.3)	$	0.3