RETIREMENT BENEFITS - Pre-tax Amounts Recorded in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	Jan. 02, 2026	Jan. 03, 2025
Defined Benefit Plan Disclosure [Line Items]
Actuarial gain	$ (362)	$ (331)
Net prior service (credit) cost	(109)	(142)
Total recognized in accumulated other comprehensive income (loss), pre-tax	(471)	(473)
Pension
Defined Benefit Plan Disclosure [Line Items]
Actuarial gain	(273)	(245)
Net prior service (credit) cost	(110)	(144)
Total recognized in accumulated other comprehensive income (loss), pre-tax	(383)	(389)
Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Actuarial gain	(89)	(86)
Net prior service (credit) cost	1	2
Total recognized in accumulated other comprehensive income (loss), pre-tax	$ (88)	$ (84)