BUSINESS SEGMENTS - Revenues and Income From Continuing Operations by Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2023	Dec. 30, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Revenue	$ 19,419	$ 17,062	$ 17,814
Operating income	1,426	1,127	2,109
FAS pension service cost	(35)	(46)
Pension Plan
Segment Reporting Information [Line Items]
FAS pension service cost	(33)	(44)	(66)
Non-service FAS pension income	(282)	(422)	(430)
Plans Under US Government Contracts | Pension Plan
Segment Reporting Information [Line Items]
FAS pension service cost	(35)	(46)	(68)
Less: CAS pension cost	(145)	(141)	(191)
FAS/CAS operating adjustment	110	95	123
Non-service FAS pension income	310	441	445
FAS/CAS pension adjustment, net	420	536	568
Corporate non-segment
Segment Reporting Information [Line Items]
Revenue	(189)	(165)	(204)
Operating income	(1,140)	(699)	(665)
Operating segments
Segment Reporting Information [Line Items]
Operating income	2,566	1,826	2,774
Operating segments | SAS
Segment Reporting Information [Line Items]
Revenue	6,856	6,384	6,315
Operating income	756	665	782
Operating segments | IMS
Segment Reporting Information [Line Items]
Revenue	6,630	6,626	6,733
Operating income	459	494	845
Operating segments | CS
Segment Reporting Information [Line Items]
Revenue	5,070	4,217	4,287
Operating income	1,229	667	1,043
Operating segments | AR
Segment Reporting Information [Line Items]
Revenue	1,052	0	0
Operating income	122
Operating segments | Other non-reportable businesses
Segment Reporting Information [Line Items]
Revenue	0	0	683
Operating income	$ 0	$ 0	$ 104