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Discontinued Operations (Tables)
12 Months Ended
Dec. 31, 2014
Discontinued Operations and Disposal Groups [Abstract]  
Summary of the financial information for the discontinued operations
A summary of the financial information for the discontinued operations is as follows:
 
Year Ended December 31,
 
2013
 
2012
 
(in millions)
Revenue from discontinued operations
$
1.5

 
$
2.2

Income from discontinued operations
$
0.9

 
$
1.4