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Sale of NAC Subsidiary (Tables)
12 Months Ended
Dec. 31, 2013
Discontinued Operation, Additional Disclosures [Abstract]  
Schedule of Discontinued Operations Income Statement Disclosures [Table Text Block]
 
Years Ended December 31,
 
2013
 
2012
 
2011
Revenue
$
13.7

 
$
56.0

 
$
71.0

Cost of sales
11.8

 
47.4

 
62.2

Gross profit
1.9

 
8.6

 
8.8

Advanced technology costs

 
0.8

 
1.6

Selling, general and administrative
1.8

 
5.8

 
5.7

Operating income
0.1

 
2.0

 
1.5

Gain on sale of subsidiary
35.6

 

 

Income before income taxes
35.7

 
2.0

 
1.5

Provision for income taxes
11.0

 
0.8

 
0.8

Net income from discontinued operations
$
24.7

 
$
1.2

 
$
0.7