Defined Benefit Pension Plans (Tables)

6 Months Ended

Jun. 30, 2013

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	2013			2012			2013			2012
Service cost	$	0.8		$	0.9		$	1.6		$	1.8
Interest cost	3.3			3.7			6.5			7.4
Expected return on plan assets	(4.1		)	(4.3		)	(8.2		)	(8.6		)
Amortization of prior service cost	—			0.1			0.1			0.2
Amortization of net loss	1.9			1.7			3.7			3.4
Net periodic pension cost	$	1.9		$	2.1		$	3.7		$	4.2