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Discontinued Operations (Tables)
 9 Months Ended
Sep. 30, 2017
Discontinued Operations and Disposal Groups [Abstract]  
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):
 
September 30, 2017
 
December 31, 2016
Assets of discontinued operations:
 
 
 
Current assets
$
1.0

 
$
1.0

Other assets
2.4

 
2.5

 
 
 
 
Liabilities of discontinued operations:
 
 
 

Current liabilities
0.2

 
0.1