Pension and Other Post-Retirement Benefits (Tables)

3 Months Ended

Mar. 31, 2016

Compensation and Retirement Disclosure [Abstract]

Pension obligations and plan assets and other post-retirement obligations

The following table shows components of our pension and other post-retirement benefits expense for the three months ended March 31, 2016 and 2015 (in millions):

	2016 Pension Benefits			2015 Pension Benefits			2016 Retiree Health and Life			2015 Retiree Health and Life
Service cost	$	1.6		$	1.7		$	—		$	—
Interest cost	3.9			4.9			0.3			0.4
Expected return on plan assets	(6.5		)	(6.5		)	—			—
Amortization of (1):
Unrecognized prior service credit	(0.2		)	(0.2		)	(0.1		)	—
Unrecognized net actuarial loss	2.6			3.5			—			—
Net expense	$	1.4		$	3.4		$	0.2		$	0.4

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(1) Amounts reclassified from accumulated other comprehensive loss.