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Property, Plant and Equipment Property, Plant and Equipment
 12 Months Ended
Dec. 31, 2015
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
PROPERTY, PLANT AND EQUIPMENT
 
December 31,
 
2015
 
2014
 
(millions)
Property, plant and equipment, gross
$
4.0

 
$
3.7

Accumulated depreciation
(0.5
)
 
(0.2
)
Property, plant and equipment, net
$
3.5

 
$
3.5