Pension and Postretirement Plans (Tables)

9 Months Ended

Sep. 30, 2012

General Discussion of Pension and Other Postretirement Benefits [Abstract]

Schedule of Defined Benefit Plans Disclosures

Pension and postretirement benefit costs are as follows:

	Three Months Ended September 30,
	2012			2011			2012			2011
(dollars in millions)	Pension Benefits						Postretirement and Other Benefits
Service cost	$	0.7		$	1.2		$	0.2		$	0.1
Interest cost on projected benefit obligation	5.3			6.2			1.4			1.7
Expected return on plan assets	(6.6		)	(7.4		)	—			—
Amortization of:
Prior service cost (benefit)	—			0.1			(3.2		)	(3.3		)
Actuarial loss	4.8			3.6			1.6			1.7
Benefit costs	$	4.2		$	3.7		$	—		$	0.2

	Nine Months Ended September 30,
	2012			2011			2012			2011
(dollars in millions)	Pension Benefits						Postretirement and Other Benefits
Service cost	$	2.0		$	3.8		$	0.4		$	0.3
Interest cost on projected benefit obligation	16.0			18.6			4.2			5.3
Expected return on plan assets	(19.6		)	(22.0		)	—			—
Amortization of:
Prior service cost (benefit)	0.1			0.3			(9.8		)	(9.9		)
Actuarial loss	14.5			10.7			5.0			4.9
Curtailment loss	—			4.2			—			—
Benefit costs	$	13.0		$	15.6		$	(0.2	)	$	0.6