Pension and Other Post-Retirement Benefits

3 Months Ended

Mar. 31, 2018

Retirement Benefits [Abstract]

Pension and Other Post-Retirement Benefits

Pension and Other Post-Retirement Benefits

The following table shows the components of our pension and other post-retirement benefits expense for the three months ended March 31, 2018 and 2017 (in millions):

	2018 Pension Benefits			2017 Pension Benefits			2018 Retiree Health and Life		2017 Retiree Health and Life
Service cost	$	1.9		$	1.6		$	0.1	$	—
Interest cost	3.7			3.8			0.2		0.2
Expected return on plan assets	(5.6		)	(6.0		)	—		—
Amortization of (1):
Unrecognized prior service credit	—			—			—		—
Unrecognized net actuarial loss (gain)	2.5			2.3			—		(0.1		)
Net periodic cost	$	2.5		$	1.7		$	0.3	$	0.1

________

(1) Amounts reclassified from accumulated other comprehensive loss.

In 2018, we adopted ASU 2017-07 which modifies how an entity must present service costs and other components of net benefit cost. See "Note 2. Basis of Presentation" for further details. In accordance with this new guidance, the service cost component of net periodic cost is recorded in selling, general and administrative expense in the Statements of Comprehensive Income, and the non-service components of net periodic cost are recorded in other expense.