Pension and Other Post-Retirement Benefits (Tables)

9 Months Ended

Sep. 30, 2020

Components of pension and other post retirement benefit costs

The following table shows the components of our pension and other post-retirement net periodic cost for the three months ended September 30, 2020 and 2019 (in millions):


	2020 Pension Benefits		2019 Pension Benefits		2020 Retiree Health and Life		2019 Retiree Health and Life
Service cost	$	2.0	$	1.7	$	—	$	—
Interest cost	3.1		3.8		0.1		0.2
Expected return on plan assets	(5.0)		(5.6)		—		—
Amortization of (1):
Unrecognized prior service credit	—		—		—		—
Unrecognized net actuarial loss (gain)	3.1		2.0		(0.1)		—
Net periodic cost	$	3.2	$	1.9	$	—	$	0.2

The following table shows the components of our pension and other post-retirement benefits expense for the nine months ended September 30, 2020 and 2019 (in millions):


	2020 Pension Benefits		2019 Pension Benefits		2020 Retiree Health and Life		2019 Retiree Health and Life
Service cost	$	6.0	$	4.9	$	0.1	$	0.1
Interest cost	9.2		11.4		0.4		0.7
Expected return on plan assets	(15.1)		(16.6)		—		—

Amortization of (1):
Unrecognized prior service credit	—		—		(0.1)		(0.1)
Unrecognized net actuarial loss (gain)	9.5		6.0		(0.3)		(0.1)
Net periodic cost	$	9.6	$	5.7	$	0.1	$	0.6

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(1) Amounts reclassified from accumulated other comprehensive loss.