POSTRETIREMENT BENEFIT PLANS - Schedule of Pretax Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 26, 2023
Qualified defined benefit pension plans
Operating:
Service cost	$ (15)	$ (16)
Non-operating:
Interest cost	(349)	(365)
Expected return on plan assets	393	430
Amortization of actuarial losses	(65)	(42)
Amortization of prior service credits	37	87
Non-service FAS pension income	16	110
Total FAS pension income	1	94
Retiree medical and life insurance plans
Operating:
Service cost	(1)	(1)
Non-operating:
Interest cost	(16)	(17)
Expected return on plan assets	27	26
Amortization of actuarial losses	9	8
Amortization of prior service credits	(1)	(3)
Non-service FAS pension income	19	14
Total FAS pension income	$ 18	$ 13