Inventory (Details) (USD $)	Sep. 30, 2012	Dec. 31, 2011
Components of inventories
Raw materials	$ 101,900,000	$ 83,800,000
Work in process	183,600,000	169,400,000
Finished goods	107,400,000	73,600,000
Total inventory	392,936,000	326,843,000
Inventory, Various Programs, Gross	$ 13,800,000