Acquisition, Dispositions, Goodwill and Other Intangible Assets (Goodwill) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Goodwill [Line Items]
Goodwill - Beginning Balance			$ 36,609
Goodwill Resulting from Business Combinations			19,983
Goodwill - Foreign Currency Translation and Other			(140)
Goodwill - Ending Balance	$ 53,269		53,269
Goodwill impairment	(3,183)	$ 0	(3,183)	$ 0
Collins Aerospace Systems [Member]
Goodwill [Line Items]
Goodwill - Beginning Balance			35,025
Goodwill Resulting from Business Combinations			(886)
Goodwill - Foreign Currency Translation and Other			(120)
Goodwill - Ending Balance	30,836		30,836
Fair Value in Excess of Net Book Value, Amount	$ 1,400		$ 1,400
Fair Value in Excess of Net Book Value, Percent	19.00%		19.00%
Goodwill impairment			$ (3,183)
Goodwill impairment impact of 25bps increase in discount rate	$ 1,200		1,200
Goodwill impairment impact of 25bps decrease in discount rate	1,300		1,300
Goodwill impairment impact of 10% increase in cash flows	2,500		2,500
Goodwill impairment impact of 10% decrease in cash flows	2,100		2,100
Collins Aerospace Systems [Member] | Trade Names [Member]
Goodwill [Line Items]
Impairment of Intangible Asset, Tradename	17		57
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
Goodwill impairment			0
Raytheon Intelligence & Space [Member]
Goodwill [Line Items]
Goodwill - Beginning Balance			0
Goodwill Resulting from Business Combinations			8,422
Goodwill - Foreign Currency Translation and Other			2
Goodwill - Ending Balance	8,424		8,424
Goodwill impairment			0
Raytheon Missiles & Defense
Goodwill [Line Items]
Goodwill - Beginning Balance			0
Goodwill Resulting from Business Combinations			11,067
Goodwill - Foreign Currency Translation and Other			0
Goodwill - Ending Balance	11,067		11,067
Goodwill impairment			0
Total Segments [Member]
Goodwill [Line Items]
Goodwill - Beginning Balance			36,588
Goodwill Resulting from Business Combinations			18,603
Goodwill - Foreign Currency Translation and Other			(118)
Goodwill - Ending Balance	51,890		51,890
Goodwill impairment			(3,183)
Eliminations and other [Member]
Goodwill [Line Items]
Goodwill - Beginning Balance			21
Goodwill Resulting from Business Combinations			1,380
Goodwill - Foreign Currency Translation and Other			(22)
Goodwill - Ending Balance	$ 1,379		1,379
Goodwill impairment			$ 0