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Defined Benefit Pension Plans (Tables)
 3 Months Ended
Mar. 31, 2014
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
2014
 
2013
Service cost
$
0.9

 
$
0.8

Interest cost
3.7

 
3.2

Expected return on plan assets
(4.2
)
 
(4.1
)
Amortization of prior service cost
—

 
0.1

Amortization of net loss
1.4

 
1.8

Net periodic pension cost
$
1.8

 
$
1.8