Pension and Other Postemployment Benefits

3 Months Ended

Mar. 31, 2020

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):

	Three Months Ended March 31,
	2020		2019
Service cost	$	2.0	$	2.3
Interest cost	1.3		1.6
Expected return on plan assets	(0.3)		(0.4)
Amortization of prior service cost	0.2		0.2
Amortization of actuarial losses	1.4		0.3
	$	4.6	$	4.0

We contributed $0.1 million and $0.4 million to our defined benefit pension plans in the three months ended March 31, 2020 and 2019, respectively.

Postemployment Arrangements

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

	Three Months Ended March 31,
	2020		2019
Service cost	$	1.2	$	1.1
Interest cost	0.9		1.1
Amortization of prior service cost	1.1		1.1
Amortization of actuarial losses	0.5		0.2
	$	3.7	$	3.5