Components of Net Periodic Benefit Cost (Tables)

3 Months Ended

Mar. 31, 2023

Retirement Benefits [Abstract]

Schedule of net periodic benefit cost

	Pension Benefits
	Three months ended March 31,
	2023		2022
Service cost	$	1.1	$	1.1
Interest cost	2.6		2.5
Expected return on plan assets	(5.9)		(5.8)
Amortization of prior service costs	0.0		—
Amortization of net loss	0.9		0.7
Net periodic benefit cost (income)	$	(1.3)	$	(1.5)

	Other Postretirement Benefits
	Three months ended March 31,
	2023		2022
Service cost	$	0.0	$	0.1
Interest cost	0.7		0.7
Amortization of prior service cost	0.0		(0.5)
Amortization of net loss	0.3		0.5
Net periodic benefit cost (income)	$	1.0	$	0.8