INFORMATION ON BUSINESS SEGMENTS - Summary of Operating Results For Each Business Segment (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 25, 2018	Mar. 26, 2017
Net sales
Total net sales	$ 11,635	$ 11,212
Operating profit
Total operating profit	1,725	1,402
Unallocated items
Additional charge for performance matter on EADGE-T, gross		120
Additional charge for performance matter on EADGE-T, after tax		$ 74
Additional charge for performance matter on EADGE-T, after tax (in dollars per share)		$ 0.25
Aeronautics
Net sales
Total net sales	4,398	$ 4,120
Missiles and Fire Control
Net sales
Total net sales	1,677	1,549
Rotary and Mission Systems
Net sales
Total net sales	3,223	3,127
Space
Net sales
Total net sales	2,337	2,416
Business segments
Operating profit
Total operating profit	1,310	1,091
Business segments | Aeronautics
Operating profit
Total operating profit	474	439
Business segments | Missiles and Fire Control
Operating profit
Total operating profit	261	234
Business segments | Rotary and Mission Systems
Operating profit
Total operating profit	311	128
Business segments | Space
Operating profit
Total operating profit	264	290
Segment reconciling items
Unallocated items
FAS/CAS operating adjustment	451	403
Stock-based compensation	(38)	(44)
Other, net	2	(48)
Total unallocated items	415	311
Intersegment sales
Net sales
Total net sales	626	569
Intersegment sales | Aeronautics
Net sales
Total net sales	25	25
Intersegment sales | Missiles and Fire Control
Net sales
Total net sales	95	73
Intersegment sales | Rotary and Mission Systems
Net sales
Total net sales	461	445
Intersegment sales | Space
Net sales
Total net sales	$ 45	26
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