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Sale of NAC Subsidiary (Tables)
6 Months Ended
Jun. 30, 2013
Discontinued Operation, Additional Disclosures [Abstract]  
Schedule of Discontinued Operations Income Statement Disclosures [Table Text Block]
 
Three Months Ended 
 June 30,
 
Six Months Ended 
 June 30,
 
2013
 
2012
 
2013
 
2012
Revenue
$

 
$
11.0

 
$
13.7

 
$
30.5

Cost of sales

 
8.9

 
11.8

 
26.3

Gross profit

 
2.1

 
1.9

 
4.2

Advanced technology costs

 
0.3

 

 
0.4

Selling, general and administrative

 
1.6

 
1.8

 
2.9

Operating income

 
0.2

 
0.1

 
0.9

Gain on sale of subsidiary

 

 
35.6

 

Income before income taxes

 
0.2

 
35.7

 
0.9

Provision for income taxes

 
0.1

 
14.0

 
0.3

Net income from discontinued operations
$

 
$
0.1

 
$
21.7

 
$
0.6