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Inventories (Tables)
 9 Months Ended
Sep. 30, 2012
Inventory Disclosure [Abstract]  
Inventories
Inventories consist of the following (in millions):
Balance at
September 30, 2012
 
January 1, 2012
Raw materials and supplies
$
128.1

 
$
107.3

Work in process
152.4

 
104.9

Finished goods
31.5

 
28.0

 
312.0

 
240.2

Progress payments
(7.0
)
 
(3.4
)
LIFO reserve
(17.4
)
 
(17.4
)
Total inventories, net
$
287.6

 
$
219.4