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Inventories (Tables)
6 Months Ended
Jun. 30, 2014
Inventory Disclosure [Abstract]  
Inventories
Inventories at June 30, 2014 and December 31, 2013 were as follows (in millions):
 
June 30,
2014
 
December 31,
2013
Raw materials and supplies
$
293.3

 
$
277.6

Work-in-process
1,087.7

 
984.9

Finished goods
151.4

 
162.1

Total inventories at current cost
1,532.4

 
1,424.6

Adjustment from current cost to LIFO cost basis
(8.5
)
 
29.4

Inventory valuation reserves
(51.4
)
 
(84.3
)
Progress payments
(66.0
)
 
(47.6
)
Total inventories, net
$
1,406.5

 
$
1,322.1