Restructuring Charges (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Oct. 01, 2020	Sep. 30, 2021	Oct. 01, 2020
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 800,000	$ 19,500,000	$ 8,100,000	$ 68,400,000
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		11,100,000		47,500,000
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs		8,400,000		20,900,000
Fuselage Systems [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	200,000	6,600,000	2,900,000	39,100,000
Propulsion Systems [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	0.0	3,800,000	(200,000)	14,200,000
Wing Systems [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 600,000	$ 9,100,000	$ 5,400,000	$ 15,100,000