Pension and Postretirement Plans (Tables)

9 Months Ended

Sep. 30, 2014

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, 2014 and 2013, pension and postretirement benefit costs were as follows:

	Three Months Ended September 30,
	2014			2013			2014			2013
(dollars in millions)	Pension Benefits						Postretirement and Other Benefits
Service cost	$	0.3		$	0.3		$	0.1		$	0.1
Interest cost on projected benefit obligation	5.2			4.7			1.0			1.0
Expected return on plan assets	(7.0		)	(6.3		)	—			—
Amortization of:
Prior service cost (benefit)	0.1			0.1			(3.9		)	(3.7		)
Actuarial loss	4.3			5.4			1.4			1.4
Total amortization	4.4			5.5			(2.5		)	(2.3		)
Benefit costs	$	2.9		$	4.2		$	(1.4	)	$	(1.2	)

	Nine Months Ended September 30,
	2014			2013			2014			2013
(dollars in millions)	Pension Benefits						Postretirement and Other Benefits
Service cost	$	0.8		$	1.7		$	0.2		$	0.3
Interest cost on projected benefit obligation	15.7			14.1			3.0			3.0
Expected return on plan assets	(21.1		)	(19.2		)	—			—
Curtailment gain	—			(0.6		)	—			—
Amortization of:
Prior service cost (benefit)	0.2			0.2			(11.6		)	(10.2		)
Actuarial loss	13.0			16.4			4.1			4.3
Total amortization	13.2			16.6			(7.5		)	(5.9		)
Benefit costs	$	8.6		$	12.6		$	(4.3	)	$	(2.6	)