Pension and Postretirement Plans (Tables)

9 Months Ended

Sep. 30, 2015

General Discussion of Pension and Other Postretirement Benefits [Abstract]

Schedule of Net Benefit Costs [Table Text Block]

For the three and nine months ended September 30, 2015 and 2014, pension and postretirement benefit costs were as follows:

	Three Months Ended September 30,
	2015			2014			2015			2014
(dollars in millions)	Pension Benefits						Postretirement and Other Benefits
Service cost	$	—		$	0.3		$	0.1		$	0.1
Interest cost on projected benefit obligation	4.8			5.2			0.8			1.0
Expected return on plan assets	(7.3		)	(7.0		)	—			—
Amortization of:
Prior service cost (benefit)	—			0.1			(3.9		)	(3.9		)
Actuarial loss	5.2			4.3			1.4			1.4
Total amortization	5.2			4.4			(2.5		)	(2.5		)
Benefit costs	$	2.7		$	2.9		$	(1.6	)	$	(1.4	)

	Nine Months Ended September 30,
	2015			2014			2015			2014
(dollars in millions)	Pension Benefits						Postretirement and Other Benefits
Service cost	$	0.3		$	0.8		$	0.2		$	0.2
Interest cost on projected benefit obligation	14.3			15.7			2.5			3.0
Expected return on plan assets	(21.8		)	(21.1		)	—			—
Curtailment loss	0.3			—			—			—
Amortization of:
Prior service cost (benefit)	0.1			0.2			(11.6		)	(11.6		)
Actuarial loss	19.7			13.0			4.1			4.1
Total amortization	19.8			13.2			(7.5		)	(7.5		)
Benefit costs	$	12.9		$	8.6		$	(4.8	)	$	(4.3	)