Inventory (Details 1) - USD ($) $ in Millions	9 Months Ended
	Sep. 28, 2017	Sep. 27, 2018	Dec. 31, 2017
Capitalized Preproduction Costs Included In Inventory [Abstract]
Capitalized pre-production		$ 39.8	$ 78.9
Deferred Production Costs		0.0	640.3
Forward loss provision		(147.3)	0.0
Total inventory, net		$ 931.0	1,449.9
Reduction In Previously Reported Forward-Loss	$ (359.6)
Airbus Three Hundred Fifty XWB [Member]
Capitalized Preproduction Costs Included In Inventory [Abstract]
Deferred Production Costs			632.8
Rolls-Royce
Capitalized Preproduction Costs Included In Inventory [Abstract]
Deferred Production Costs			$ 129.3