POSTRETIREMENT BENEFIT PLANS - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 25, 2023	Jun. 30, 2024	Jun. 25, 2023
Defined Benefit Plan Disclosure [Line Items]
Credit (cost) recognition of previously deferred postretirement benefit plan amounts, before tax	$ 24,000,000	$ (47,000,000)	$ 48,000,000	$ (94,000,000)
Amortization of actuarial gains (losses), net of tax	19,000,000	(37,000,000)	38,000,000	(74,000,000)
Material contributions to qualified defined benefit pension plans	0	0	0	0
Retiree medical and life insurance plans
Defined Benefit Plan Disclosure [Line Items]
Credit (cost) recognition of previously deferred postretirement benefit plan amounts, before tax	$ 4,000,000	$ 4,000,000	$ 8,000,000	$ 7,000,000