BUSINESS SEGMENT INFORMATION - Revenues and Income From Continuing Operations by Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 03, 2026	Mar. 28, 2025
Segment Reporting Information [Line Items]
Revenue	$ 5,744	$ 5,132
Cost of revenue	(4,342)	(3,782)
Segment operating income	652	525
Non-service FAS pension income and other, net	75	90
Interest expense, net	(136)	(150)
Income before income taxes	589	459
Operating segments
Segment Reporting Information [Line Items]
Revenue	5,744	4,986
Cost of revenue	(4,318)	(3,687)
Segment operating income	902	777
Operating segments | SMS
Segment Reporting Information [Line Items]
Revenue	2,990	2,411
Cost of revenue	(2,439)	(1,948)
Segment operating income	313	238
Operating segments | CSD
Segment Reporting Information [Line Items]
Revenue	1,855	1,809
Cost of revenue	(1,163)	(1,157)
Segment operating income	465	443
Operating segments | MSL
Segment Reporting Information [Line Items]
Revenue	990	840
Cost of revenue	(807)	(656)
Segment operating income	124	96
Intersegment
Segment Reporting Information [Line Items]
Revenue	(91)	(74)
Cost of revenue	91	74
Intersegment | SMS
Segment Reporting Information [Line Items]
Revenue	(23)	(26)
Intersegment | CSD
Segment Reporting Information [Line Items]
Revenue	(57)	(29)
Intersegment | MSL
Segment Reporting Information [Line Items]
Revenue	(11)	(18)
Other
Segment Reporting Information [Line Items]
Revenue	0	146
Cost of revenue	(24)	(95)
Corporate
Segment Reporting Information [Line Items]
Segment operating income	$ (250)	$ (252)