Boeing MOU (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 28, 2017	Sep. 28, 2017	Sep. 29, 2016
Subsequent Event [Line Items]
Increase (Decrease) in Customer Advances		$ (154.7)	$ (101.8)
Current Period Forward Loss Recorded		(359.6)
Inventory Type B787 [Member]
Subsequent Event [Line Items]
Increase (Decrease) in Customer Advances		$ (235.0)
Current Period Forward Loss Recorded	$ 352.8