SIGNIFICANT ACCOUNTING POLICIES - FAS/CAS Operating Adjustments (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 02, 2026	Jan. 03, 2025	Dec. 29, 2023
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
FAS pension service cost	$ (26)	$ (36)
Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
FAS pension service cost	(25)	(34)	$ (33)
Plans Under US Government Contracts | Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
FAS pension service cost	(26)	(36)	(35)
Less: CAS pension cost	(36)	(64)	(145)
FAS/CAS operating adjustment	$ 10	$ 28	$ 110