Defined Benefit Pension Plans (Tables)

3 Months Ended

Mar. 31, 2015

Compensation and Retirement Disclosure [Abstract]

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

The net periodic pension cost included the following components:

	Three Months Ended March 31,
Dollar amounts in millions	2015			2014
Service cost	$	1.0		$	0.9
Interest cost	3.4			3.7
Expected return on plan assets	(3.8		)	(4.2		)
Amortization of prior service cost	0.1			—
Amortization of net loss	1.8			1.4
Net periodic pension cost	$	2.5		$	1.8