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. 24, 2018	Jun. 25, 2017	Jun. 24, 2018	Jun. 25, 2017
Net sales
Total net sales	$ 13,398	$ 12,563	$ 25,033	$ 23,775
Operating profit
Total operating profit	1,795	1,716	3,520	3,118
Unallocated items
Severance and restructuring charges	96	0	96	0
Severance and restructuring charges	96	0	96	0
Aeronautics
Net sales
Total net sales	5,321	4,922	9,719	9,042
Missiles and Fire Control
Net sales
Total net sales	2,085	1,784	3,762	3,333
Rotary and Mission Systems
Net sales
Total net sales	3,566	3,414	6,789	6,541
Unallocated items
Severance and restructuring charges	96		96
Severance and restructuring charges	96		96
Restructuring charges, net of tax	$ 76		$ 76
Restructuring charges (in dollars per share)	$ 0.26		$ 0.26
Space
Net sales
Total net sales	$ 2,426	2,443	$ 4,763	4,859
Business segments
Net sales
Total net sales	13,398	12,563	25,033	23,775
Operating profit
Total operating profit	1,466	1,347	2,776	2,438
Business segments | Aeronautics
Net sales
Total net sales	5,321	4,922	9,719	9,042
Operating profit
Total operating profit	572	567	1,046	1,006
Business segments | Missiles and Fire Control
Net sales
Total net sales	2,085	1,784	3,762	3,333
Operating profit
Total operating profit	279	253	540	487
Business segments | Rotary and Mission Systems
Net sales
Total net sales	3,566	3,414	6,789	6,541
Operating profit
Total operating profit	341	271	652	399
Business segments | Space
Net sales
Total net sales	2,426	2,443	4,763	4,859
Operating profit
Total operating profit	274	256	538	546
Segment reconciling items
Unallocated items
FAS/CAS operating adjustment	451	404	902	807
Stock-based compensation	(60)	(57)	(98)	(101)
Severance and restructuring charges	(96)	0	(96)	0
Other, net	34	22	36	(26)
Total unallocated items	329	369	744	680
Severance and restructuring charges	(96)	0	(96)	0
Intersegment sales
Net sales
Total net sales	692	673	1,318	1,242
Intersegment sales | Aeronautics
Net sales
Total net sales	27	40	52	65
Intersegment sales | Missiles and Fire Control
Net sales
Total net sales	113	66	208	139
Intersegment sales | Rotary and Mission Systems
Net sales
Total net sales	504	548	965	993
Intersegment sales | Space
Net sales
Total net sales	$ 48	$ 19	$ 93	45
Advanced Military Maintenance, Repair and Overhaul Center
Unallocated items
Equity method investee impairment				64
Equity method investee impairment, after tax				$ 40
Equity method investee impairment (in dollars per share)				$ 0.14