Pension and Postretirement Plans (Tables)

3 Months Ended

Mar. 31, 2016

General Discussion of Pension and Other Postretirement Benefits [Abstract]

Schedule of Net Benefit Costs [Table Text Block]

For the three months ended March 31, 2016 and 2015, pension and postretirement benefit costs were as follows:

	Three Months Ended March 31,
	2016			2015			2016			2015
(dollars in millions)	Pension Benefits						Postretirement and Other Benefits
Service cost	$	—		$	—		$	0.1		$	0.1
Interest cost on projected benefit obligation	4.8			4.6			0.8			0.8
Expected return on plan assets	(6.8		)	(7.2		)	—			—
Amortization of:
Prior service cost (benefit)	—			0.1			(3.7		)	(3.9		)
Actuarial loss	4.8			5.1			1.2			1.4
Total amortization	4.8			5.2			(2.5		)	(2.5		)
Pension / postretirement costs (benefits)	$	2.8		$	2.6		$	(1.6	)	$	(1.6	)