Retirement Plans

3 Months Ended

Mar. 31, 2023

Retirement Benefits [Abstract]

Retirement Plans

(10) Retirement Plans

The components of the net periodic benefit cost (credit) for our plans were as follows:

	Three Months Ended March 31,
	Defined Benefit Pension Plans						Retiree Health Care Plan
	2023			2022			2023			2022
Service cost	$	3.8		$	5.1		$	—		$	—
Interest cost		5.2			2.3			0.1			0.1
Expected return on assets		(4.6	)		(3.9	)		—			—
Net (gain) loss		(0.9	)		0.5			—			—
Prior service cost (credit)		0.2			0.2			(0.2	)		(0.2	)
Total benefit cost (credit)	$	3.7		$	4.2		$	(0.1	)	$	(0.1	)

During the three months ended March 31, 2023, contributions made to our pension plans and retiree health care plan were $5.2 and $0.3, respectively. During 2023, we expect to make total contributions of approximately $21.0 to our pension plans and to fund our retiree health care payments as incurred.