INFORMATION ON BUSINESS SEGMENTS - Summary of Operating Results For Each Business Segment (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2018	Jun. 24, 2018	Sep. 24, 2017	Mar. 26, 2017	Sep. 30, 2018	Sep. 24, 2017
Net sales
Total net sales	$ 14,318		$ 12,341		$ 39,351	$ 36,116
Operating profit
Total operating profit	1,963		1,677		5,483	4,795
Unallocated items
Severance and restructuring charges	0		0		96	0
Severance and restructuring charges	0		0		96	0
Aeronautics
Net sales
Total net sales	5,642		4,716		15,361	13,758
Missiles and Fire Control
Net sales
Total net sales	2,273		1,957		6,035	5,290
Rotary and Mission Systems
Net sales
Total net sales	3,848		3,363		10,637	9,904
Unallocated items
Severance and restructuring charges		$ 96
Severance and restructuring charges		96
Restructuring charges, net of tax		$ 76
Restructuring charges (in dollars per share)		$ 0.26
Space
Net sales
Total net sales	2,555		2,305		7,318	7,164
Business segments
Net sales
Total net sales	14,318		12,341		39,351	36,116
Operating profit
Total operating profit	1,586		1,287		4,362	3,725
Business segments | Aeronautics
Net sales
Total net sales	5,642		4,716		15,361	13,758
Operating profit
Total operating profit	600		513		1,646	1,519
Business segments | Missiles and Fire Control
Net sales
Total net sales	2,273		1,957		6,035	5,290
Operating profit
Total operating profit	332		298		872	785
Business segments | Rotary and Mission Systems
Net sales
Total net sales	3,848		3,363		10,637	9,904
Operating profit
Total operating profit	361		257		1,013	656
Business segments | Space
Net sales
Total net sales	2,555		2,305		7,318	7,164
Operating profit
Total operating profit	293		219		831	765
Segment reconciling items
Unallocated items
FAS/CAS operating adjustment	451		403		1,353	1,210
Stock-based compensation	(50)		(32)		(148)	(133)
Severance and restructuring charges	0		0		(96)	0
Other, net	(24)		19		12	(7)
Total unallocated items	377		390		1,121	1,070
Severance and restructuring charges	0		0		(96)	0
Intersegment sales
Net sales
Total net sales	764		621		2,082	1,863
Intersegment sales | Aeronautics
Net sales
Total net sales	35		33		87	98
Intersegment sales | Missiles and Fire Control
Net sales
Total net sales	122		104		330	243
Intersegment sales | Rotary and Mission Systems
Net sales
Total net sales	544		453		1,509	1,446
Intersegment sales | Space
Net sales
Total net sales	$ 63		$ 31		$ 156	$ 76
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