Pension and Other Postretirement Benefits (Tables)

3 Months Ended

Mar. 31, 2019

Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]

Schedule of Net Benefit Costs

The net periodic benefit cost for the three months ended March 31, 2019 and 2018 includes the following components: 

	Pension Benefits						Postretirement Benefits
	Three Months Ended   March 31,						Three Months Ended   March 31,
Components of Net Periodic Benefit Cost	2019			2018			2019		2018
Selling, general, and administrative expenses:
Service cost	$	6.5		$	7.1		$	0.5	$	0.6
Total selling, general, and administrative expenses	$	6.5		$	7.1		$	0.5	$	0.6
Non-operating expenses:
Interest cost	7.6			7.0			0.8		0.7
Expected return on plan assets	(8.6		)	(8.1		)	—		—
Amortization of:
Net actuarial loss	4.9			6.7			0.1		0.2
Prior service cost (gain)	—			0.1			—		(0.5		)
Total non-operating expenses	$	3.9		$	5.7		$	0.9	$	0.4
Net periodic benefit cost	$	10.4		$	12.8		$	1.4	$	1.0