POSTRETIREMENT BENEFIT PLANS - Schedule of Pretax Net Periodic Benefit Cost (Details) - Qualified defined benefit pension plans - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 28, 2025	Sep. 29, 2024	Sep. 28, 2025	Sep. 29, 2024
Operating:
Service cost	$ (12)	$ (15)	$ (38)	$ (45)
Non-operating:
Interest cost	(368)	(349)	(1,104)	(1,048)
Expected return on plan assets	359	393	1,079	1,179
Amortization of actuarial losses	(78)	(64)	(235)	(194)
Amortization of prior service (costs) credits	(12)	36	(36)	110
Non-service FAS pension (expense) income	(99)	16	(296)	47
Total FAS pension (expense) income	$ (111)	$ 1	$ (334)	$ 2