Employee Benefits

3 Months Ended

Mar. 31, 2023

Retirement Benefits [Abstract]

Employee Benefits

5. Employee Benefits

Non-Union Pension Plans

The following table presents the primary components of net periodic pension expense (benefit) for our Company-sponsored pension plans:

(in millions)	Three Months Ended March 31, 2023			Three Months Ended March 31, 2022
Interest cost	$	8.0		$	5.9
Expected return on plan assets		(8.8	)		(8.5	)
Amortization of prior net losses		1.9			2.2
Amortization of prior net service credit		(0.1	)		(0.1	)
Total net periodic pension expense (benefit)	$	1.0		$	(0.5	)