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Inventory (Details) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Components of inventories
Raw materials	$ 110,100,000	$ 101,800,000
Work in process	347,200,000	230,500,000
Finished goods	113,100,000	115,100,000
Total inventory	570,390,000	447,373,000
Inventory, Various Programs, Gross	$ 76,300,000

Carrying amount, net of reserves and adjustments, as of the balance sheet date of merchandise or goods which are partially completed. This inventory is generally comprised of raw materials, labor and factory overhead costs, which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.

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