Pension and Other Post-Retirement Benefits (Tables)

6 Months Ended

Jun. 30, 2019

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

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 June 30, 2019 and 2018 (in millions):

	2019 Pension Benefits			2018 Pension Benefits			2019 Retiree Health and Life			2018 Retiree Health and Life
Service cost	$	1.5		$	2.2		$	0.1		$	—
Interest cost	3.8			3.7			0.3			0.3
Expected return on plan assets	(5.5		)	(5.5		)	—			—
Amortization of (1):
Unrecognized prior service credit	—			—			(0.1		)	(0.1		)
Unrecognized net actuarial loss	2.1			2.6			(0.1		)	—
Net periodic cost	$	1.9		$	3.0		$	0.2		$	0.2

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

	2019 Pension Benefits			2018 Pension Benefits			2019 Retiree Health and Life			2018 Retiree Health and Life
Service cost	$	3.2		$	4.1		$	0.1		$	0.1
Interest cost	7.6			7.4			0.5			0.5
Expected return on plan assets	(11.0		)	(11.1		)	—			—
Amortization of (1):
Unrecognized prior service credit	—			—			(0.1		)	(0.1		)
Unrecognized net actuarial loss	4.0			5.1			(0.1		)	—
Net periodic cost	$	3.8		$	5.5		$	0.4		$	0.5

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(1) Amounts reclassified from accumulated other comprehensive loss.