Employee Benefits (Tables)

3 Months Ended

Mar. 31, 2018

Compensation and Retirement Disclosure [Abstract]

Schedule of Net Benefit Costs [Table Text Block]

The following table sets forth the Company's net periodic benefit costs related to its Pension Plan, SERP and Medical Plan:

	Three Months Ended
	March 31,
	2018			2017
Pension Plan and SERP benefits	(in millions)
Service cost	$	0.2		$	0.3
Interest cost	1.1			1.2
Expected return on plan assets	(1.4		)	(1.3		)
Amortization of prior service costs(1)	0.2			0.3
Amortization of actuarial losses(1)	0.3			0.3
Periodic expense	$	0.4		$	0.8
Medical Plan benefits
Amortization of prior service costs(1)	(0.1		)	(0.1		)
Periodic expense	$	(0.1	)	$	(0.1	)

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⁽¹⁾  Amortization of prior service costs and actuarial losses out of accumulated other comprehensive income are recognized on the Condensed Consolidated Statements of Operations within "Interest and other income (expense)".