Pension and Postretirement Plans (Tables)

9 Months Ended

Sep. 30, 2011

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,
	2011			2010			2011			2010
(dollars in millions)	Pension Benefits						Postretirement and Other Benefits
Service cost	$	1.2		$	1.3		$	0.1		$	—
Interest cost on projected benefit obligation	6.2			6.7			1.7			2.0
Expected return on plan assets	(7.4		)	(7.7		)	—			—
Amortization of:
Prior service cost (benefit)	0.1			0.2			(3.3		)	(3.2		)
Actuarial loss	3.6			2.4			1.7			1.3
Benefit costs	$	3.7		$	2.9		$	0.2		$	0.1

	Nine Months Ended September 30,
	2011			2010			2011			2010
(dollars in millions)	Pension Benefits						Postretirement and Other Benefits
Service cost	$	3.8		$	3.9		$	0.3		$	0.2
Interest cost on projected benefit obligation	18.6			20.1			5.3			6.0
Expected return on plan assets	(22.0		)	(22.7		)	—			—
Amortization of:
Prior service cost (benefit)	0.3			0.4			(9.9		)	(9.8		)
Actuarial loss	10.7			7.0			4.9			3.9
Curtailment loss	4.2			—			—			—
Benefit costs	$	15.6		$	8.7		$	0.6		$	0.3