Debt - Narrative (Details) - USD ($) $ in Thousands	1 Months Ended		12 Months Ended
	Dec. 31, 2025	Aug. 31, 2025	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Line of credit facility, expiration period			5 years
Debt repayments			$ 3,621,000	$ 8,673,000	$ 5,216,000
Interest costs incurred			2,956,000	2,874,000	2,560,000
Interest paid, including capitalized interest, operating and investing activities			2,630,000	2,440,000	2,408,000
Interest paid, capitalized, investing activities			185,000	$ 149,000	$ 101,000
Spirit AeroSystems Holdings, Inc.
Debt Instrument [Line Items]
Business combination, recognized identifiable assets acquired and liabilities assumed, long-term debt	$ 3,608,000		$ 3,608,000
Debt repayments	$ 2,260,000
Spirit AeroSystems Holdings, Inc. | Boeing Common Stock
Debt Instrument [Line Items]
Business combination, initial exchange rate	6.7067		6.7067
Debt instrument, initial exchange rate, per principal amount	$ 1		$ 1
Spirit AeroSystems Holdings, Inc. | Exchangeable Notes Due 2028
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	3.25%		3.25%
Senior Notes | Spirit AeroSystems Holdings, Inc. | Senior Notes Due 2026
Debt Instrument [Line Items]
Business combination, recognized identifiable assets acquired and liabilities assumed, long-term debt, remaining	$ 300,000		$ 300,000
Debt instrument, interest rate, stated percentage	3.85%		3.85%
Senior Notes | Spirit AeroSystems Holdings, Inc. | Senior Notes Due 2028
Debt Instrument [Line Items]
Business combination, recognized identifiable assets acquired and liabilities assumed, long-term debt, remaining	$ 700,000		$ 700,000
Debt instrument, interest rate, stated percentage	4.60%		4.60%
Exchangeable Notes | Spirit AeroSystems Holdings, Inc. | Exchangeable Notes Due 2028
Debt Instrument [Line Items]
Business combination, recognized identifiable assets acquired and liabilities assumed, long-term debt, remaining	$ 230,000		$ 230,000
Three Hundred and Sixty Four Day Revolving Credit Facility - Expiring August 2026 | Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 3,000,000
Line of credit facility, expiration period		364 days
Three Year Credit Facility - Termination August 2025 | Line of Credit
Debt Instrument [Line Items]
Line of credit facility, expiration period		3 years
Three Year Credit Facility - Termination August 2025 | Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 3,000,000
Three Hundred and Sixty Four Day Revolving Credit Facility - Expiring August 2027 | Line of Credit
Debt Instrument [Line Items]
Line of credit facility, expiration period		364 days
One Year Credit Facility - Expiring August 2027 | Line of Credit
Debt Instrument [Line Items]
Line of credit facility, term out period		1 year
Five Year Credit Facility Expiring - August 2028 | Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 3,000,000
Line of credit facility, expiration period		5 years
Five Year Credit Facility Expiring - May 2029 | Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 4,000,000
Line of credit facility, expiration period		5 years
Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 10,000,000		$ 10,000,000