Pension and Other Postemployment Benefits

9 Months Ended

Sep. 30, 2022

Pension and Other Postemployment Benefits [Abstract]

Pension and Other Postemployment Benefits

Pension and Other Postemployment Benefits

Defined Benefit Pension Plans

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

	Nine Months Ended September 30,
	2022		2021
Service cost	$	2.3	$	3.9
Interest cost	2.8		2.7
Expected return on plan assets	(0.7)		(0.8)
Amortization of prior service cost	0.3		0.5
Amortization of actuarial losses	2.9		7.0
	$	7.6	$	13.3

We contributed $0.4 million and $0.5 million to our defined benefit pension plans in each of the nine months ended September 30, 2022 and 2021, respectively.

Postemployment Arrangements

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

	Nine Months Ended September 30,
	2022		2021
Service cost	$	3.3	$	3.6
Interest cost	2.0		1.6
Amortization of prior service cost	2.8		3.1
Amortization of actuarial losses	1.9		2.9
	$	10.0	$	11.2