INFORMATION ON BUSINESS SEGMENTS - Summary of Operating Results For Each Business Segment (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 28, 2020	Jun. 30, 2019	Jun. 28, 2020	Jun. 30, 2019
Net sales
Total net sales	$ 16,220	$ 14,427	$ 31,871	$ 28,763
Operating profit
Total operating profit	2,086	2,008	4,208	4,291
Unallocated items
Equity method investment impairment	128		128	0
Equity method investment impairment, after tax	$ 96		$ 96
Equity method investment impairment (in USD per share)	$ 0.34		$ 0.34
Aeronautics
Net sales
Total net sales	$ 6,503	5,550	$ 12,872	11,134
Missiles and Fire Control
Net sales
Total net sales	2,801	2,411	5,420	4,761
Rotary and Mission Systems
Net sales
Total net sales	4,039	3,768	7,785	7,530
Space
Net sales
Total net sales	2,877	2,698	5,794	5,338
Business segments
Net sales
Total net sales	16,220	14,427	31,871	28,763
Operating profit
Total operating profit	1,790	1,554	3,515	3,269
Business segments | Aeronautics
Net sales
Total net sales	6,503	5,550	12,872	11,134
Operating profit
Total operating profit	739	592	1,411	1,177
Business segments | Missiles and Fire Control
Net sales
Total net sales	2,801	2,411	5,420	4,761
Operating profit
Total operating profit	370	327	766	744
Business segments | Rotary and Mission Systems
Net sales
Total net sales	4,039	3,768	7,785	7,530
Operating profit
Total operating profit	429	347	805	726
Business segments | Space
Net sales
Total net sales	2,877	2,698	5,794	5,338
Operating profit
Total operating profit	252	288	533	622
Segment reconciling items
Unallocated items
FAS/CAS operating adjustment	469	512	938	1,024
Stock-based compensation	(73)	(67)	(115)	(104)
Other, net	(100)	9	(130)	102
Total unallocated items	296	454	693	1,022
Intersegment sales
Net sales
Total net sales	808	737	1,609	1,467
Intersegment sales | Aeronautics
Net sales
Total net sales	61	47	120	89
Intersegment sales | Missiles and Fire Control
Net sales
Total net sales	140	144	276	265
Intersegment sales | Rotary and Mission Systems
Net sales
Total net sales	502	461	1,000	960
Intersegment sales | Space
Net sales
Total net sales	$ 105	$ 85	$ 213	$ 153