Benefit Plans and Other Postretirement Benefits (Tables)

3 Months Ended

Mar. 31, 2016

Benefit Plans and Other Postretirement Benefits

Schedule of components of net pension expense

	Pension Benefits						Other Postretirement Benefits
	Three months ended March 31,
	2016			2015			2016		2015
Service cost	$	2.3		$	2.3		$	—	$	—
Interest cost	5.7			5.8			0.1		0.1
Expected return on plan assets	(7.5		)	(7.3		)	—		—
Amortization of prior service cost	0.6			0.6			—		—
Amortization of net actuarial losses	6.3			6.5			0.2		0.1
Net pension expense	$	7.4		$	7.9		$	0.3	$	0.2