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Property, Plant and Equipment Property, Plant and Equipment (Tables)
 3 Months Ended
Mar. 31, 2014
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
A summary of changes in property, plant and equipment follows (in millions):
 
December 31,
2013
 
Capital Expenditures (Depreciation)
 
Retirements
 
March 31,
2014
Leasehold improvements
$
141.1

 
$
—

 
$
(109.9
)
 
$
31.2

Machinery and equipment
164.0

 
—

 
(36.5
)
 
127.5

 
305.1

 
—

 
(146.4
)
 
158.7

Accumulated depreciation and amortization
(297.2
)
 
(2.5
)
 
146.2

 
(153.5
)
 
$
7.9

 
$
(2.5
)
 
$
(0.2
)
 
$
5.2