Pension and Postretirement Plans (Tables)

9 Months Ended

Sep. 30, 2016

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, 2016 and 2015, pension and postretirement benefit costs were as follows:

	Three Months Ended September 30,
	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	4.9			4.8			0.8			0.8
Expected return on plan assets	(6.9		)	(7.3		)	—			—
Amortization of:
Prior service cost (benefit)	0.1			—			(3.7		)	(3.9		)
Actuarial loss	4.7			5.2			1.2			1.4
Total amortization	4.8			5.2			(2.5		)	(2.5		)
Pension / postretirement cost (benefit)	$	2.8		$	2.7		$	(1.6	)	$	(1.6	)

	Nine Months Ended September 30,
	2016			2015			2016			2015
(dollars in millions)	Pension Benefits						Postretirement and Other Benefits
Service cost	$	—		$	0.3		$	0.2		$	0.2
Interest cost on projected benefit obligation	14.5			14.3			2.5			2.5
Expected return on plan assets	(20.5		)	(21.8		)	—			—
Curtailment loss	—			0.3			—			—
Amortization of:
Prior service cost (benefit)	0.1			0.1			(11.1		)	(11.6		)
Actuarial loss	14.3			19.7			3.7			4.1
Total amortization	14.4			19.8			(7.4		)	(7.5		)
Pension / postretirement cost (benefit)	$	8.4		$	12.9		$	(4.7	)	$	(4.8	)