POSTRETIREMENT BENEFIT PLANS - Schedule of Pretax Net Periodic Benefit Cost (Details) - Qualified defined benefit pension plans - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 29, 2025	Jun. 30, 2024	Jun. 29, 2025	Jun. 30, 2024
Operating:
Service cost	$ (13)	$ (15)	$ (26)	$ (30)
Non-operating:
Interest cost	(368)	(350)	(736)	(699)
Expected return on plan assets	360	393	720	786
Amortization of actuarial losses	(79)	(65)	(157)	(130)
Amortization of prior service (costs) credits	(12)	37	(24)	74
Non-service FAS pension/retiree medical and life income	(99)	15	(197)	31
Total FAS pension (expense) income	$ (112)	$ 0	$ (223)	$ 1