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Inventories (Tables)
 12 Months Ended
Dec. 31, 2013
Inventory Disclosure [Abstract]  
Schedule of Inventory
Inventories at December 31, 2013 and 2012 were as follows (in millions):
 
 
2013
 
2012
Raw materials and supplies
 
$
277.6

 
$
351.6

Work-in-process
 
984.9

 
1,127.0

Finished goods
 
162.1

 
209.0

Total inventories at current cost
 
1,424.6

 
1,687.6

Adjustment from current cost to LIFO cost basis
 
29.4

 
(76.9
)
Inventory valuation reserves
 
(84.3
)
 
(63.1
)
Progress payments
 
(47.6
)
 
(11.0
)
Total inventories, net
 
$
1,322.1

 
$
1,536.6