Spirit Acquisition - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions			12 Months Ended
	Dec. 08, 2025	Dec. 04, 2025	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Business Combination [Line Items]
Goodwill			$ 17,275	$ 8,084	$ 8,093
Spirit AeroSystems Holdings, Inc.
Business Combination [Line Items]
Fair value of total consideration	$ 8,371
Business acquisition, exchange ratio	19.55%
Business acquisition, share price (in dollars per share)		$ 37.25
Business combination, volume weighted average, price per share (in dollars per share)		$ 190.493
Business acquisition, trading day		15 days
Business combination, acquisition-related cost, expense			$ 53
Goodwill	$ 9,997
Business combination, recognized liability assumed, accrued liability	$ 1,065
Business combination, finalized purchase price allocation, duration	1 year
Business combination, goodwill and intangible asset, expected tax deductible, amount	$ 30
Spirit AeroSystems Holdings, Inc. | Settlement of loans, advances and other payments to Spirit
Business Combination [Line Items]
Business combination, consideration transferred, liabilities incurred	$ 2,571
Spirit AeroSystems Holdings, Inc. | Customer base
Business Combination [Line Items]
Acquired finite-lived intangible assets, weighted average useful life	5 years
Spirit AeroSystems Holdings, Inc. | Spirit Common Stock
Business Combination [Line Items]
Business combination, consideration transferred, equity interest, share exchanged, number of shares (in shares)	117,500,000
Spirit AeroSystems Holdings, Inc. | Boeing Common Stock
Business Combination [Line Items]
Business acquisition, equity interest issued or issuable, number of shares (in shares)	22,977,008