Pension and Postretirement Plans (Tables)

6 Months Ended

Jun. 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 June 30,
	2011			2010			2011			2010
(dollars in millions)	Pension Benefits						Postretirement and Other Benefits
Service cost	$	1.3		$	1.3		$	0.1		$	0.1
Interest cost on projected benefit obligation	6.2			6.7			1.8			2.0
Expected return on plan assets	(7.3		)	(7.5		)	—			—
Amortization of:
Prior service cost (benefit)	0.1			0.1			(3.3		)	(3.3		)
Actuarial loss	3.5			2.3			1.6			1.3
Curtailment loss	4.2			—			—			—
Benefit costs	$	8.0		$	2.9		$	0.2		$	0.1

	Six Months Ended June 30,
	2011			2010			2011			2010
(dollars in millions)	Pension Benefits						Postretirement and Other Benefits
Service cost	$	2.6		$	2.6		$	0.2		$	0.2
Interest cost on projected benefit obligation	12.4			13.4			3.6			4.0
Expected return on plan assets	(14.6		)	(15.0		)	—			—
Amortization of:
Prior service cost (benefit)	0.2			0.2			(6.6		)	(6.6		)
Actuarial loss	7.1			4.6			3.2			2.6
Curtailment loss	4.2			—			—			—
Benefit costs	$	11.9		$	5.8		$	0.4		$	0.2