Pension and Postretirement Plans (Tables)

9 Months Ended

Sep. 30, 2013

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, 2013 and 2012, pension and postretirement benefit costs were as follows:

	Three Months Ended September 30,
	2013			2012			2013			2012
(dollars in millions)	Pension Benefits						Postretirement and Other Benefits
Service cost	$	0.3		$	0.7		$	0.1		$	0.2
Interest cost on projected benefit obligation	4.7			5.3			1.0			1.4
Expected return on plan assets	(6.3		)	(6.6		)	—			—
Amortization of:
Prior service cost (benefit)	0.1			—			(3.7		)	(3.2		)
Actuarial loss	5.4			4.8			1.4			1.6
Total amortization	5.5			4.8			(2.3		)	(1.6		)
Benefit costs	$	4.2		$	4.2		$	(1.2	)	$	—

	Nine Months Ended September 30,
	2013			2012			2013			2012
(dollars in millions)	Pension Benefits						Postretirement and Other Benefits
Service cost	$	1.7		$	2.0		$	0.3		$	0.4
Interest cost on projected benefit obligation	14.1			16.0			3.0			4.2
Expected return on plan assets	(19.2		)	(19.6		)	—			—
Curtailment gain	(0.6		)	—			—			—
Amortization of:
Prior service cost (benefit)	0.2			0.1			(10.2		)	(9.8		)
Actuarial loss	16.4			14.5			4.3			5.0
Total amortization	16.6			14.6			(5.9		)	(4.8		)
Benefit costs	$	12.6		$	13.0		$	(2.6	)	$	(0.2	)