Pension and Other Postemployment Benefits

3 Months Ended

Mar. 31, 2017

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 for the three months ended March 31, 2017 and 2016 were (in millions):

	2017			2016
Service cost	$	2.3		$	2.0
Interest cost	1.8			1.7
Expected return on plan assets	(0.7		)	(0.7		)
Amortization of prior service cost	1.1			1.1
Amortization of actuarial losses	1.6			1.2
	$	6.1		$	5.3

We contributed $0.3 million and $0.5 million to our defined benefit pension plans in the three months ended March 31, 2017 and 2016, respectively.

Postemployment Arrangements

The components of net periodic benefit expense for the three months ended March 31, 2017 and 2016 were (in millions):

	2017		2016
Service cost	$	1.1	$	1.0
Interest cost	0.9		0.9
Amortization of prior service cost	0.9		0.7
Amortization of actuarial losses	0.3		0.3
	$	3.2	$	2.9