Pension and Other Post-Retirement Benefits (Tables)

9 Months Ended

Sep. 30, 2019

Retirement Benefits [Abstract]

Components of pension and other post retirement benefit costs

The following table shows the components of our pension and other post-retirement benefits expense for the three months ended September 30, 2019 and 2018 (in millions):

	2019 Pension Benefits			2018 Pension Benefits			2019 Retiree Health and Life		2018 Retiree Health and Life
Service cost	$	1.7		$	2.0		$	—	$	0.1
Interest cost	3.8			3.7			0.2		0.2
Expected return on plan assets	(5.6		)	(5.6		)	—		—
Settlement expense	—			2.1			—		—
Amortization of (1):
Unrecognized prior service credit	—			—			—		(0.1		)
Unrecognized net actuarial loss	2.0			2.5			—		—
Net periodic cost	$	1.9		$	4.7		$	0.2	$	0.2

The following table shows the components of our pension and other post-retirement benefits expense for the nine months ended September 30, 2019 and 2018 (in millions):

	2019 Pension Benefits			2018 Pension Benefits			2019 Retiree Health and Life			2018 Retiree Health and Life
Service cost	$	4.9		$	6.1		$	0.1		$	0.2
Interest cost	11.4			11.1			0.7			0.7
Expected return on plan assets	(16.6		)	(16.7		)	—			—
Settlement expense	—			2.1			—			—
Amortization of (1):
Unrecognized prior service credit	—			—			(0.1		)	(0.2		)
Unrecognized net actuarial loss (gain)	6.0			7.6			(0.1		)	—
Net periodic cost	$	5.7		$	10.2		$	0.6		$	0.7

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(1) Amounts reclassified from accumulated other comprehensive loss.