POSTRETIREMENT BENEFIT PLANS - Schedule of Pretax Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 25, 2023	Jun. 26, 2022	Jun. 25, 2023	Jun. 26, 2022
Non-operating:
Pension settlement charge			$ 0	$ (1,470)
Qualified defined benefit pension plans
Operating:
Service cost	$ (16)	$ (24)	(32)	(48)
Non-operating:
Interest cost	(365)	(303)	(730)	(605)
Expected return on plan assets	431	503	861	1,005
Amortization of actuarial losses	(42)	(151)	(84)	(301)
Amortization of prior service credits	87	90	174	180
Pension settlement charge	0	(1,470)	0	(1,470)
Non-service FAS pension income (expense)	111	(1,331)	221	(1,191)
Total FAS pension income (expense)	95	(1,355)	189	(1,239)
Retiree medical and life insurance plans
Operating:
Service cost	(2)	(2)	(3)	(4)
Non-operating:
Interest cost	(17)	(12)	(34)	(24)
Expected return on plan assets	26	34	52	68
Amortization of actuarial losses	8	12	16	23
Amortization of prior service credits	(2)	(7)	(5)	(14)
Non-service FAS pension income (expense)	15	27	29	53
Total FAS pension income (expense)	$ 13	$ 25	$ 26	$ 49