Employee Benefit Plans

6 Months Ended

Jun. 30, 2023

Retirement Benefits [Abstract]

Employee Benefit Plans

Note 12 – Employee Benefit Plans

Net periodic benefit costs related to the Company’s unfunded supplemental benefit pension plans are summarized as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
(in millions)	2023		2022		2023		2022
Expense:
Interest costs	$	2.6	$	1.5	$	5.1	$	3.0
Amortization of net actuarial loss		0.6		1.4		1.1		2.9
Amortization of prior service cost		—		0.1		—		0.2
	$	3.2	$	3.0	$	6.2	$	6.1

The Company contributed $7.7 million to its unfunded supplemental benefit pension plans during the six months ended June 30, 2023 and expects to contribute an additional $8.0 million during the remainder of 2023.