Defined Benefit Pension Plans (Tables)

6 Months Ended

Jun. 30, 2012

Compensation and Retirement Disclosure [Abstract]

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

The net periodic pension cost included the following components:

	Quarter Ended June 30,						Six Months Ended June 30,
Dollar amounts in millions	2012			2011			2012			2011
Service cost	$	0.9		$	0.8		$	1.8		$	1.6
Interest cost	3.7			4.0			7.4			8.0
Expected return on plan assets	(4.3		)	(4.5		)	(8.6		)	(9.0		)
Amortization of prior service cost	0.1			0.1			0.2			0.2
Amortization of net loss	1.7			1.1			3.4			2.2
Net periodic pension cost	$	2.1		$	1.5		$	4.2		$	3.0