Pension and Other Postretirement Benefits (Tables)

3 Months Ended

Mar. 31, 2018

Retirement Benefits, Description [Abstract]

Schedule of Defined Benefit Plans Disclosures

Net periodic benefit (income) expense for pension and other postretirement benefits was as follows:

	Three Months Ended March 31,
	2018			2017
Pension Benefits
Service cost	$	0.8		$	0.7
Interest cost	23.7			27.0
Expected return on assets	(38.8		)	(37.6		)
Amortization of prior service cost	1.0			1.2
Amortization of loss	3.9			2.7
Net periodic benefit (income) expense	$	(9.4	)	$	(6.0	)
Other Postretirement Benefits
Service cost	$	1.1		$	1.2
Interest cost	3.9			4.3
Amortization of prior service cost (credit)	(3.4		)	(14.6		)
Amortization of (gain) loss	(0.3		)	(1.1		)
Net periodic benefit (income) expense	$	1.3		$	(10.2	)