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Other Liabilities
 12 Months Ended
Dec. 31, 2016
Other Liabilities [Abstract]  
Other Liabilities
Other Liabilities
(in millions) December 31,
 
2016

 
2015

Environmental
 
$
34.0

 
$
48.9

Other
 
65.8

 
63.9

 
 
$
99.8

 
$
112.8