Employee Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2024

Defined Benefit Plan Disclosure [Line Items]

Components of Net Periodic Benefit Cost

The components of net periodic expense were as follows (in millions):

	Defined Benefit Pension Plan						Supplemental Non-qualified Defined Benefit Plans				Non-pension Defined Benefit Postretirement Healthcare Plan
Three Months Ended June 30,	2024			2023			2024		2023		2024			2023
Service cost	$	0.6		$	0.6		$	0.7	$	0.8	$	0.4		$	0.4
Interest cost		4.1			4.4			0.3		0.3		0.6			0.6
Expected return on plan assets		(4.5	)		(4.7	)		-		-		(0.1	)		(0.1	)
Net amortization of prior service costs		-			-			-		-		0.1			-
Recognized net actuarial loss		0.5			0.5			-		-		-			-
Net periodic expense	$	0.7		$	0.8		$	1.0	$	1.1	$	1.0		$	0.9

	Defined Benefit Pension Plan						Supplemental Non-qualified Defined Benefit Plans				Non-pension Defined Benefit Postretirement Healthcare Plan
Six Months Ended June 30,	2024			2023			2024		2023		2024			2023
Service cost	$	1.1		$	1.2		$	1.6	$	1.7	$	0.8		$	0.8
Interest cost		8.2			8.7			0.7		0.7		1.2			1.2
Expected return on plan assets		(9.0	)		(9.3	)		-		-		(0.1	)		(0.1	)
Net amortization of prior service costs		-			-			-		-		0.1			-
Recognized net actuarial loss		1.0			1.0			-		-		-			-
Net periodic expense	$	1.3		$	1.6		$	2.3	$	2.4	$	2.0		$	1.9

Schedule of Employer Contribution to Employee Benefit Plans

Contributions made in the first six months of 2024 and anticipated contributions for 2024 and 2025 are as follows (in millions):

	Contributions Made		Additional Contributions		Contributions
	Six Months Ended June 30, 2024		Anticipated for 2024		Anticipated for 2025
Defined Benefit Pension Plan	$	2.3	$	-	$	1.8
Non-pension Defined Benefit Postretirement Healthcare Plan	$	2.3	$	2.3	$	4.4
Supplemental Non-qualified Defined Benefit and Defined Contribution Plans	$	1.2	$	1.2	$	2.8