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Other Liabilities
 12 Months Ended
Dec. 31, 2015
Other Liabilities [Abstract]  
Other Liabilities
Other Liabilities
(in millions) December 31,
 
2015

 
2014

Environmental
 
$
48.9

 
$
64.4

Other
 
63.9

 
67.5

 
 
$
112.8

 
$
131.9