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. 30, 2019	Jun. 24, 2018	Jun. 30, 2019	Jun. 24, 2018
Net sales
Total net sales	$ 14,427	$ 13,398	$ 28,763	$ 25,033
Operating profit
Total operating profit	2,008	1,795	4,291	3,520
Unallocated items
Severance and restructuring charges	0	96	0	96
Aeronautics
Net sales
Total net sales	5,550	5,321	11,134	9,719
Missiles and Fire Control
Net sales
Total net sales	2,411	2,085	4,761	3,762
Rotary and Mission Systems
Net sales
Total net sales	3,768	3,566	7,530	6,789
Unallocated items
Severance and restructuring charges		96
Severance and restructuring charges, net of tax		$ 76
Severance and restructuring charges (in dollars per share)		$ 0.26
Space
Net sales
Total net sales	2,698	$ 2,426	5,338	4,763
Business segments
Net sales
Total net sales	14,427	13,398	28,763	25,033
Operating profit
Total operating profit	1,554	1,466	3,269	2,776
Business segments | Aeronautics
Net sales
Total net sales	5,550	5,321	11,134	9,719
Operating profit
Total operating profit	592	572	1,177	1,046
Business segments | Missiles and Fire Control
Net sales
Total net sales	2,411	2,085	4,761	3,762
Operating profit
Total operating profit	327	279	744	540
Business segments | Rotary and Mission Systems
Net sales
Total net sales	3,768	3,566	7,530	6,789
Operating profit
Total operating profit	347	341	726	652
Business segments | Space
Net sales
Total net sales	2,698	2,426	5,338	4,763
Operating profit
Total operating profit	288	274	622	538
Segment reconciling items
Unallocated items
FAS/CAS operating adjustment	512	451	1,024	902
Stock-based compensation	(67)	(60)	(104)	(98)
Severance and restructuring charges	0	(96)	0	(96)
Other, net	9	34	102	36
Total unallocated items	454	329	1,022	744
Intersegment sales
Net sales
Total net sales	814	692	1,625	1,318
Intersegment sales | Aeronautics
Net sales
Total net sales	47	27	89	52
Intersegment sales | Missiles and Fire Control
Net sales
Total net sales	144	113	265	208
Intersegment sales | Rotary and Mission Systems
Net sales
Total net sales	538	504	1,118	965
Intersegment sales | Space
Net sales
Total net sales	$ 85	$ 48	$ 153	$ 93