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Goodwill (Tables)
 12 Months Ended
Dec. 31, 2015
Goodwill [Abstract]  
Schedule of Goodwill [Table Text Block]
A summary of our goodwill in our retail and logistics segments are as follows (in millions):

 
 
 
Retail
 
Logistics
 
Total
Balance,
December 31, 2012
 
$
62.2

 
$
10.5

 
$
72.7

Acquisitions
 
—

 
1.2

 
1.2

Balance,
December 31, 2013
 
62.2

 
11.7

 
73.9

Acquisitions
 
—

 
—

 
—

Balance,
December 31, 2014
 
62.2

 
11.7

 
73.9

Acquisitions
 
—

 
0.5

 
0.5

Balance,
December 31, 2015
 
$
62.2

 
$
12.2

 
$
74.4