Goodwill and Intangible Assets (Goodwill) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2025 USD ($)
Goodwill [Roll Forward]
Beginning Balance	$ 52,789
Acquisitions and Divestitures	0
Foreign Currency Translation and Other	256
Ending Balance	53,045
Operating segments
Goodwill [Roll Forward]
Beginning Balance	52,772
Acquisitions and Divestitures	0
Foreign Currency Translation and Other	256
Ending Balance	53,028
Eliminations and other
Goodwill [Roll Forward]
Beginning Balance	17
Acquisitions and Divestitures	0
Foreign Currency Translation and Other	0
Ending Balance	17
Collins Aerospace | Operating segments
Goodwill [Roll Forward]
Beginning Balance	32,223
Acquisitions and Divestitures	0
Foreign Currency Translation and Other	256
Ending Balance	32,479
Pratt & Whitney | Operating segments
Goodwill [Roll Forward]
Beginning Balance	1,563
Acquisitions and Divestitures	0
Foreign Currency Translation and Other	0
Ending Balance	1,563
Raytheon | Operating segments
Goodwill [Roll Forward]
Beginning Balance	18,986
Acquisitions and Divestitures	0
Foreign Currency Translation and Other	0
Ending Balance	$ 18,986