Defined Benefit Pension Plans (Tables)

3 Months Ended

Mar. 31, 2016

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	2016			2015
Service cost	$	1.2		$	1.0
Interest cost	3.3			3.4
Expected return on plan assets	(3.3		)	(3.8		)
Amortization of prior service cost	0.1			0.1
Amortization of net loss	1.4			1.8
Net periodic pension cost	$	2.7		$	2.5