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Discontinued Operations (Tables)
 3 Months Ended
Mar. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]  
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement [Table Text Block]
Summary financial results of discontinued operations were as follows ($ in millions):
 
Three Months Ended
 
March 31, 2018
 
March 31, 2017
Net sales
$
—

 
$
—

Other income (expense)
(0.4
)
 
—

Loss from discontinued operations before income taxes
(0.4
)
 
—

Income tax (provision) benefit
—

 
—

Loss from discontinued operations
(0.4
)
 
—
Major Classes of Assets and Liabilities Associated with Discontinued Operations
Included in Other current assets, Other assets and Accrued expenses within the condensed consolidated balance sheet are the following major classes of assets and liabilities, respectively, associated with the discontinued operations ($ in millions):
 
March 31, 2018
 
December 31, 2017
Assets of discontinued operations:
 
 
 
Current assets
$
1.0

 
1.0

Other assets
1.9

 
2.4

 
 
 
 
Liabilities of discontinued operations:
 
 
 

Current liabilities
0.1

 
0.1