Pension and Other Postemployment Benefits

3 Months Ended

Mar. 31, 2024

Pension and Other Postemployment Benefits [Abstract]

Pension and Other Postemployment Benefits

Pension and Other Postemployment Benefits

Net periodic benefit expense:

	Defined Benefit Pension Plans				Postemployment Arrangements
	Three Months Ended March 31,
	2024		2023		2024		2023
Service cost	$	0.6	$	0.9	$	0.8	$	0.9
Interest cost	1.0		2.3		1.5		1.4
Expected return on plan assets	(0.2)		(0.2)		—		—
Amortization of prior service cost	0.1		0.1		1.1		1.0
Amortization of actuarial losses	0.2		0.2		0.1		—
Total net periodic benefit expense	$	1.7	$	3.3	$	3.5	$	3.3

We contributed $0.1 million to our defined benefit pension plans in each of the three months ended March 31, 2024 and 2023.