Pension and Postretirement Plans (Tables)

6 Months Ended

Jun. 30, 2015

General Discussion of Pension and Other Postretirement Benefits [Abstract]

Schedule of Net Benefit Costs [Table Text Block]

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

	Three Months Ended June 30,
	2015			2014			2015			2014
(dollars in millions)	Pension Benefits						Postretirement and Other Benefits
Service cost	$	0.3		$	0.2		$	—		$	—
Interest cost on projected benefit obligation	4.9			6.0			0.9			1.1
Expected return on plan assets	(7.3		)	(7.3		)	—			—
Curtailment loss	0.3			—			—			—
Amortization of:
Prior service cost (benefit)	—			0.1			(3.8		)	(3.9		)
Actuarial loss	9.4			3.4			1.3			1.4
Total amortization	9.4			3.5			(2.5		)	(2.5		)
Benefit costs	$	7.6		$	2.4		$	(1.6	)	$	(1.4	)

	Six Months Ended June 30,
	2015			2014			2015			2014
(dollars in millions)	Pension Benefits						Postretirement and Other Benefits
Service cost	$	0.3		$	0.5		$	0.1		$	0.1
Interest cost on projected benefit obligation	9.5			10.5			1.7			2.0
Expected return on plan assets	(14.5		)	(14.1		)	—			—
Curtailment loss	0.3			—			—			—
Amortization of:
Prior service cost (benefit)	0.1			0.1			(7.7		)	(7.7		)
Actuarial loss	14.5			8.7			2.7			2.7
Total amortization	14.6			8.8			(5.0		)	(5.0		)
Benefit costs	$	10.2		$	5.7		$	(3.2	)	$	(2.9	)