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Acquisitions and Dispositions (Details) - USD ($) $ in Millions				3 Months Ended	9 Months Ended
	Jul. 21, 2025	Jun. 30, 2025	Mar. 29, 2024	Mar. 31, 2024	Sep. 30, 2025	Sep. 30, 2024
Business Combination [Line Items]
Pre-tax gain on sale of business					$ 0	$ 415
Actuation and Flight Control Business | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Collins
Business Combination [Line Items]
Proceeds from sale of business	$ 1,800
Cash received from sale of business, net of cash transferred, that is attributable to continuing service agreements	1,600
Pre-tax gain on sale of business	$ 100
Simmonds Precision Products Business | Disposal Group, Not Discontinued Operations | Collins
Business Combination [Line Items]
Expected proceeds from sale of business		$ 800
Cybersecurity, Intelligence and Services Business | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Raytheon
Business Combination [Line Items]
Pre-tax gain on sale of business			$ 400	$ 400
Cash proceeds from sale of business			1,300
After-tax gain on sale of business			$ 200

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