Pension and Other Postemployment Benefits

6 Months Ended

Jun. 30, 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):

	Six Months Ended June 30,
	2020		2019
Service cost	$	4.0	$	4.3
Interest cost	2.5		3.2
Expected return on plan assets	(0.5)		(0.7)
Amortization of prior service cost	0.4		0.4
Amortization of actuarial losses	2.7		0.5
	$	9.1	$	7.7

We contributed $0.5 million and $0.7 million to our defined benefit pension plans in the six months ended June 30, 2020 and 2019, respectively.

Postemployment Arrangements

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

	Six Months Ended June 30,
	2020		2019
Service cost	$	2.3	$	2.2
Interest cost	1.7		2.2
Amortization of prior service cost	2.1		2.2
Amortization of actuarial losses	1.1		0.5
	$	7.2	$	7.1