Pension and Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2024

Retirement Benefits [Abstract]

Components of Net Periodic Benefit

For all plans, the components of net periodic (benefit) expense for the three months ended September 30, 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		0.2		0.2
Expected return on plan assets	(0.8)		(0.8)		—		—
Amortization of prior service cost	(0.2)		(0.1)		(0.3)		(0.3)
Amortization of net loss (gain)	0.1		—		(0.2)		(0.2)
Other	(1.4)		—		—		—
Net periodic (benefit) expense	$	(1.3)	$	0.1	$	(0.3)	$	(0.3)

For all plans, the components of net periodic (benefit) expense for the nine months ended September 30, 2024, and 2023 are as follows:

	Pension				Postretirement
(in millions)	2024		2023		2024		2023
Service cost	$	1.6	$	1.4	$	—	$	—
Interest cost	1.5		1.6		0.5		0.6
Expected return on plan assets	(2.4)		(2.4)		—		—
Amortization of prior service cost	(0.6)		(0.5)		(0.7)		(0.8)
Amortization of net loss (gain)	0.2		—		(0.6)		(0.5)
Other	(1.4)		—		—		—
Net periodic (benefit) expense	$	(1.1)	$	0.1	$	(0.8)	$	(0.7)

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	$	1.5
Amounts contributed during the nine months ended September 30, 2024	$	1.3	$	1.4