Inventory (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Summary Of Inventories [Abstract]
Raw materials	$ 240.2	$ 250.3
Work-in-process	1,057.8	1,033.6
Finished goods	43.7	35.9
Product inventory	1,341.7	1,319.8
Capitalized pre-production (2)	486.2	524.6	553.2
Deferred production	1,661.2	1,173.8	813.2
Forward loss provision	(1,646.5)	(607.4)
Total inventory, net	1,842.6	2,410.8
Deferred Production, Reclassified from Work-In-Process		1,173.8
Other Inventory, Capitalized Costs, Gross, reclassified	$ 17.9