INFORMATION ON BUSINESS SEGMENTS - Summary of Operating Results For Each Business Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 29, 2020	Mar. 31, 2019
Net sales
Total net sales	$ 15,651	$ 14,336
Operating profit
Total operating profit	2,122	2,283
Aeronautics
Net sales
Total net sales	6,369	5,584
Missiles and Fire Control
Net sales
Total net sales	2,619	2,350
Rotary and Mission Systems
Net sales
Total net sales	3,746	3,762
Space
Net sales
Total net sales	2,917	2,640
Business segments
Net sales
Total net sales	15,651	14,336
Operating profit
Total operating profit	1,725	1,715
Business segments | Aeronautics
Net sales
Total net sales	6,369	5,584
Operating profit
Total operating profit	672	585
Business segments | Missiles and Fire Control
Net sales
Total net sales	2,619	2,350
Operating profit
Total operating profit	396	417
Business segments | Rotary and Mission Systems
Net sales
Total net sales	3,746	3,762
Operating profit
Total operating profit	376	379
Business segments | Space
Net sales
Total net sales	2,917	2,640
Operating profit
Total operating profit	281	334
Segment reconciling items
Unallocated items
FAS/CAS operating adjustment	469	512
Stock-based compensation	(42)	(37)
Other, net	(30)	93
Total unallocated items	397	568
Intersegment sales
Net sales
Total net sales	802	730
Intersegment sales | Aeronautics
Net sales
Total net sales	59	42
Intersegment sales | Missiles and Fire Control
Net sales
Total net sales	136	121
Intersegment sales | Rotary and Mission Systems
Net sales
Total net sales	499	499
Intersegment sales | Space
Net sales
Total net sales	$ 108	$ 68