Inventory (Details 1) - USD ($) $ in Millions	9 Months Ended
	Sep. 29, 2016	Sep. 28, 2017	Dec. 31, 2016
Capitalized Preproduction Costs Included In Inventory [Abstract]
Capitalized pre-production		$ 85.4	$ 103.5
Deferred Production Costs		657.6	717.4
Forward loss provision		(488.9)	(409.1)
Total inventory, net		1,363.2	1,515.3
Contract Liability		275.9
Reduction In Previously Reported Forward-Loss	$ (121.9)
B787 [Member]
Capitalized Preproduction Costs Included In Inventory [Abstract]
Forward loss provision		(76.9)
Airbus Three Hundred Fifty XWB [Member]
Capitalized Preproduction Costs Included In Inventory [Abstract]
Capitalized pre-production		73.6	83.7
Deferred Production Costs		629.1	657.2
Forward loss provision		(263.1)	(255.8)
Rolls-Royce
Capitalized Preproduction Costs Included In Inventory [Abstract]
Capitalized pre-production		7.9	15.2
Deferred Production Costs		126.3	114.6
Forward loss provision		$ (139.4)	$ (140.8)