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Property, Plant and Equipment Property, Plant and Equipment (Tables)
 12 Months Ended
Dec. 31, 2013
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
A summary of changes in property, plant and equipment follows (in millions):
 
Dec 31,
2010
 
Capital Expenditures (Depreciation)
 
Transfers and Retirements
 
Dec 31,
2011
 
Capital Expenditures (Depreciation)
 
Transfers and Retirements
 
Dec 31,
2012
Construction work in progress
$
1,126.3

 
$
135.9

 
$
(151.0
)
 
$
1,111.2

 
$
13.6

 
$
(1,122.1
)
 
$
2.7

Leasehold improvements
187.3

 
—

 
(4.4
)
 
182.9

 
—

 
0.8

 
183.7

Machinery and equipment
269.1

 
—

 
(17.9
)
 
251.2

 
0.3

 
(69.8
)
 
181.7

 
1,582.7

 
135.9

 
(173.3
)
 
1,545.3

 
13.9

 
(1,191.1
)
 
368.1

Accumulated depreciation and amortization
(351.3
)
 
(42.7
)
 
35.8

 
(358.2
)
 
(27.0
)
 
68.1

 
(317.1
)
 
$
1,231.4

 
$
93.2

 
$
(137.5
)
 
$
1,187.1

 
$
(13.1
)
 
$
(1,123.0
)
 
$
51.0


 
Dec 31,
2012
 
Capital Expenditures (Depreciation)
 
Transfers and Retirements
 
Dec 31,
2013
Construction work in progress
$
2.7

 
$
—

 
$
(2.7
)
 
$
—

Leasehold improvements
183.7

 
—

 
(42.6
)
 
141.1

Machinery and equipment
181.7

 
—

 
(17.7
)
 
164.0

 
368.1

 
—

 
(63.0
)
 
305.1

Accumulated depreciation and amortization
(317.1
)
 
(23.3
)
 
43.2

 
(297.2
)
 
$
51.0

 
$
(23.3
)
 
$
(19.8
)
 
$
7.9