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Disposal Groups and Impairment of Long-Lived Assets (Tables)
 12 Months Ended
Dec. 31, 2016
Structural Products [Member]  
Disclosures for Disposal Groups and Discontinued Operations [Table Text Block]
The results of the discontinued operations were as follows:
 
2015
 
2014
Sales
$
—

 
$
—

Other income (expense)
5

 
(19
)
Pre-tax income (loss)
5

 
(19
)
Income tax expense (benefit)
1

 
(4
)
Income (loss) from discontinued operations
$
4

 
$
(15
)