Retirement Plans

3 Months Ended

Mar. 31, 2025

Retirement Benefits [Abstract]

Retirement Plans

(10) Retirement Plans

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

	Three Months Ended March 31,
	Defined Benefit Pension Plans						Retiree Health Care Plan
	2025			2024			2025			2024
Service cost	$	3.6		$	4.1		$	-		$	-
Interest cost		4.7			4.8			0.1			0.1
Expected return on assets		(4.8	)		(4.7	)		-			-
Net loss (gain)		0.1			(0.4	)		-			-
Prior service cost (credit)		0.1			0.2			(0.2	)		(0.2	)
Total benefit cost (credit)	$	3.7		$	4.0		$	(0.1	)	$	(0.1	)

During the three months ended March 31, 2025 and 2024, contributions made to our pension plans were $5.5 and $5.2, respectively, and contributions made to our retiree health care plan were $0.3 on both dates. During 2025, we expect to make total contributions of approximately $21.0 to our pension plans and to fund our retiree health care payments as incurred.