Restructuring Charges (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jul. 01, 2021	Jul. 02, 2020	Jul. 01, 2021	Jul. 02, 2020
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 5,200,000	$ 6,300,000	$ 7,300,000	$ 48,900,000
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		4,900,000		36,400,000
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs		1,400,000		12,500,000
Fuselage Systems [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	900,000	2,400,000	2,700,000	32,500,000
Propulsion Systems [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	0.0	1,600,000	(200,000)	10,400,000
Wing Systems [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 4,300,000	$ 2,300,000	$ 4,800,000	$ 6,000,000.0