Acquisition, Dispositions, Goodwill and Intangible Assets (Goodwill) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Goodwill [Line Items]
Goodwill - Beginning Balance			$ 54,285
Goodwill Resulting from Business Combinations			82
Goodwill - Foreign Currency Translation and Other			27
Goodwill - Ending Balance	$ 54,394		54,394
Goodwill Impairment Loss	0	$ 3,183	0	$ 3,183
Collins Aerospace Systems [Member]
Goodwill [Line Items]
Goodwill - Beginning Balance			31,571
Goodwill Resulting from Business Combinations			0
Goodwill - Foreign Currency Translation and Other			26
Goodwill - Ending Balance	31,597		31,597
Goodwill Impairment Loss		$ 3,200
Pratt & Whitney [Member]
Goodwill [Line Items]
Goodwill - Beginning Balance			1,563
Goodwill Resulting from Business Combinations			0
Goodwill - Foreign Currency Translation and Other			0
Goodwill - Ending Balance	1,563		1,563
Raytheon Intelligence & Space [Member]
Goodwill [Line Items]
Goodwill - Beginning Balance			9,522
Goodwill Resulting from Business Combinations			30
Goodwill - Foreign Currency Translation and Other			5
Goodwill - Ending Balance	9,557		9,557
Goodwill, Transfers			282
Raytheon Missiles & Defense
Goodwill [Line Items]
Goodwill - Beginning Balance			11,608
Goodwill Resulting from Business Combinations			52
Goodwill - Foreign Currency Translation and Other			0
Goodwill - Ending Balance	11,660		11,660
Goodwill, Transfers			(282)
Total Segments [Member]
Goodwill [Line Items]
Goodwill - Beginning Balance			54,264
Goodwill Resulting from Business Combinations			82
Goodwill - Foreign Currency Translation and Other			31
Goodwill - Ending Balance	54,377		54,377
Eliminations and other [Member]
Goodwill [Line Items]
Goodwill - Beginning Balance			21
Goodwill Resulting from Business Combinations			0
Goodwill - Foreign Currency Translation and Other			(4)
Goodwill - Ending Balance	$ 17		$ 17