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Intangible Assets (Tables)
 6 Months Ended
Jun. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Intangible Assets and Excess Reorganization Value [Table Text Block]
 
June 30, 2017
 
December 31, 2016
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(in millions)
 
 
 
 
 
Gross Carrying Amount
 
Accumulated Amortization
 
Net Amount
 
Gross Carrying Amount
 
Accumulated Amortization
 
Net Amount
Sales order book
$
54.6

 
$
20.8

 
$
33.8

 
$
54.6

 
$
19.9

 
$
34.7

Customer relationships
68.9

 
12.6

 
56.3

 
68.9

 
10.3

 
58.6

Total
$
123.5

 
$
33.4

 
$
90.1

 
$
123.5

 
$
30.2

 
$
93.3