Inventory (Details) - USD ($) $ in Millions	Oct. 01, 2015	Dec. 31, 2014
Summary Of Inventories [Abstract]
Raw materials	$ 257.9	$ 254.5
Work-in-process	863.5	885.7
Finished goods	68.4	46.7
Product inventory	1,189.8	1,186.9
Capitalized pre-production	187.7	223.4
Deferred Production Costs	1,308.7	1,244.3
Forward loss provision	(894.7)	(901.6)
Total inventory, net	$ 1,791.5	$ 1,753.0