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PROPERTY, PLANT AND EQUIPMENT
12 Months Ended
Dec. 31, 2017
Property, Plant and Equipment [Abstract]  
PROPERTY, PLANT AND EQUIPMENT
PROPERTY, PLANT AND EQUIPMENT

Property, plant and equipment – net consist of the following (in millions):
 
December 31,
 
2017
 
2016
Property
$
43.3

 
$
36.4

Plant
144.7

 
144.3

Equipment
479.3

 
456.1

Property, Plant and Equipment – Gross
667.3

 
636.8

Less: Accumulated depreciation
(356.3
)
 
(332.2
)
Property, plant and equipment – net
$
311.0

 
$
304.6



Depreciation expense for the years ended December 31, 2017, 2016 and 2015, was $59.9 million, $65.5 million and $63.9 million, respectively.