Spirit Acquisition - Schedule of Business Combination (Details) - Spirit AeroSystems Holdings, Inc. $ in Millions	Dec. 08, 2025 USD ($)
Business Combination [Line Items]
Fair value of total consideration	$ 8,389
Settlement of loans, advances and other payments to Spirit
Business Combination [Line Items]
Business combination, consideration transferred, liabilities incurred	2,589
Debt repaid on Spirit’s behalf
Business Combination [Line Items]
Business combination, consideration transferred, liabilities incurred	948
Boeing common stock exchanged for Spirit common stock
Business Combination [Line Items]
Business combination, consideration transferred, equity interest	4,704
Premium on assumed Spirit Exchangeable Notes
Business Combination [Line Items]
Business combination, consideration transferred, equity interest	109
Exchange of Spirit share-based awards
Business Combination [Line Items]
Business combination, consideration transferred, equity interest	$ 39