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Property, Plant and Equipment Property, Plant and Equipment (Tables)
 9 Months Ended
Sep. 30, 2016
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
A summary of changes in property, plant and equipment follows (in millions):
 
December 31,
2015
 
Additions / (Depreciation)
 
Retirements
 
September 30,
2016
Land
$
1.2

 
$
—

 
$
—

 
$
1.2

Leasehold improvements
0.9

 
2.3

 
(0.2
)
 
3.0

Machinery and equipment
1.6

 
0.1

 
—

 
1.7

Other
0.3

 
0.6

 
—

 
0.9

Property, plant and equipment, gross
4.0

 
3.0

 
(0.2
)
 
6.8

Accumulated depreciation
(0.5
)
 
(0.4
)
 
0.2

 
(0.7
)
Property, plant and equipment, net
$
3.5

 
$
2.6

 
$
—

 
$
6.1