Defined Benefit and Postretirement Benefits (Tables)

6 Months Ended

Jun. 30, 2023

Retirement Benefits [Abstract]

Components of Net Periodic Benefit

For all plans, the components of net periodic benefit for the three months ended June 30, 2023, and 2022 are as follows:

	Pension				Postretirement
(in millions)	2023		2022		2023		2022
Service cost	$	0.4	$	0.5	$	—	$	—
Interest cost	0.6		0.2		0.2		0.1
Expected return on plan assets	(0.8)		(0.7)		—		—
Amortization of prior service cost	(0.2)		(0.2)		(0.2)		(0.2)
Amortization of net loss	—		0.2		(0.2)		—
Net periodic benefit	$	—	$	—	$	(0.2)	$	(0.1)

For all plans, the components of net periodic benefit for the six months ended June 30, 2023, and 2022 are as follows:

	Pension				Postretirement
(in millions)	2023		2022		2023		2022
Service cost	$	0.9	$	1.1	$	—	$	0.1
Interest cost	1.1		0.4		0.4		0.3
Expected return on plan assets	(1.6)		(1.5)		—		—
Amortization of prior service cost	(0.4)		(0.4)		(0.5)		(0.5)
Amortization of net loss	—		0.4		(0.3)		—
Net periodic benefit	$	—	$	—	$	(0.4)	$	(0.1)

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 2023	$	1.9	$	1.8
Amounts contributed during the six months ended June 30, 2023	$	1.2	$	1.7