INFORMATION ON BUSINESS SEGMENTS - Summary Operating Results For Each Business Segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 28, 2025	Sep. 29, 2024	Sep. 28, 2025	Sep. 29, 2024
Sales
Total sales	$ 18,609	$ 17,104	$ 54,727	$ 52,421
Operating costs and expenses
Total operating costs and expenses	16,369	14,987	49,430	46,181
Operating profit
Total operating profit	2,280	2,140	5,400	6,317
Unallocated items
Impairment and other charges	0	0	(66)	(87)
Business Segments
Sales
Total sales	18,609	17,104	54,727	52,421
Operating costs and expenses
Total operating costs and expenses	16,579	15,236	50,102	46,825
Operating profit
Total operating profit	2,029	1,870	4,685	5,657
Unallocated items
Unallocated items
FAS/CAS pension operating adjustment	380	406	1,138	1,218
Impairment and other charges	0	0	(66)	(87)
Intangible asset amortization expense	(70)	(61)	(197)	(183)
Other, net	(59)	(75)	(160)	(288)
Total unallocated items	251	270	715	660
Intersegment sales
Sales
Total sales	(960)	(998)	(2,909)	(2,907)
Aeronautics
Sales
Total sales	7,256	6,487	21,733	20,609
Aeronautics | Business Segments
Sales
Total sales	7,256	6,487	21,733	20,609
Operating costs and expenses
Total operating costs and expenses	6,571	5,835	20,425	18,531
Operating profit
Total operating profit	682	659	1,304	2,089
Aeronautics | Intersegment sales
Sales
Total sales	(85)	(125)	(271)	(262)
Missiles and Fire Control
Sales
Total sales	3,624	3,175	10,430	9,270
Missiles and Fire Control | Business Segments
Sales
Total sales	3,624	3,175	10,430	9,270
Operating costs and expenses
Total operating costs and expenses	3,114	2,718	8,977	8,057
Operating profit
Total operating profit	510	456	1,454	1,217
Missiles and Fire Control | Intersegment sales
Sales
Total sales	(218)	(210)	(616)	(616)
Rotary and Mission Systems
Sales
Total sales	4,373	4,367	12,696	13,003
Rotary and Mission Systems | Business Segments
Sales
Total sales	4,373	4,367	12,696	13,003
Operating costs and expenses
Total operating costs and expenses	3,868	3,879	11,896	11,605
Operating profit
Total operating profit	506	483	855	1,408
Rotary and Mission Systems | Intersegment sales
Sales
Total sales	(580)	(569)	(1,778)	(1,729)
Space
Sales
Total sales	3,356	3,075	9,868	9,539
Space | Business Segments
Sales
Total sales	3,356	3,075	9,868	9,539
Operating costs and expenses
Total operating costs and expenses	3,026	2,804	8,804	8,632
Operating profit
Total operating profit	331	272	1,072	943
Space | Intersegment sales
Sales
Total sales	$ (77)	$ (94)	$ (244)	$ (300)