POSTRETIREMENT BENEFIT PLANS - Schedule of Pretax Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 27, 2022	Mar. 28, 2021
Qualified defined benefit pension plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ (24)	$ (27)
Interest cost	(302)	(311)
Expected return on plan assets	502	569
Recognized net actuarial losses	(150)	(252)
Amortization of prior service credits	90	87
Non-service FAS retiree medical and life income	140	93
Total FAS retiree medical and life income	116	66
Retiree medical and life insurance plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	(2)	(3)
Interest cost	(12)	(13)
Expected return on plan assets	34	35
Recognized net actuarial losses	11	0
Amortization of prior service credits	(7)	(9)
Non-service FAS retiree medical and life income	26	13
Total FAS retiree medical and life income	$ 24	$ 10