Pension and Postretirement Benefits (Tables)

3 Months Ended

Mar. 31, 2024

Retirement Benefits [Abstract]

Components of Net Periodic Benefit

For all plans, the components of net periodic benefit for the three months ended March 31, 2024, and 2023 are as follows:

	Pension				Postretirement
(in millions)	2024		2023		2024		2023
Service cost	$	0.5	$	0.5	$	—	$	—
Interest cost	0.5		0.5		0.1		0.2
Expected return on plan assets	(0.8)		(0.8)		—		—
Amortization of prior service cost	(0.2)		(0.2)		(0.2)		(0.3)
Amortization of net (gain) loss	0.1		—		(0.2)		(0.1)
Net periodic expense (benefit)	$	0.1	$	—	$	(0.3)	$	(0.2)

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Expected Contributions to Pension and Postretirement Plans

We expect to contribute the following to our pension and postretirement plans:

(in millions)	Pension		Postretirement
Expected contributions in 2024	$	2.0	$	1.3
Amounts contributed during the three months ended March 31, 2024	$	0.8	$	1.0