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POSTRETIREMENT BENEFIT PLANS - Schedule of Pretax Net Periodic Benefit Cost (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 25, 2022
Sep. 26, 2021
Sep. 25, 2022
Sep. 26, 2021
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Pension settlement charge     $ (1,470) $ (1,665)
Qualified defined benefit pension plans        
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Service cost $ (20) $ (26) (68) (80)
Interest cost (342) (302) (947) (923)
Expected return on plan assets 425 517 1,430 1,655
Recognized net actuarial losses (62) (210) (363) (714)
Amortization of prior service credits 90 88 270 262
Pension settlement charge 0 (1,665) (1,470) (1,665)
Non-service FAS pension income (expense) 111 (1,572) (1,080) (1,385)
Total FAS pension income (expense) 91 (1,598) (1,148) (1,465)
Retiree medical and life insurance plans        
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Service cost (3) (3) (7) (10)
Interest cost (12) (13) (36) (39)
Expected return on plan assets 34 35 102 105
Recognized net actuarial losses 12 0 35 0
Amortization of prior service credits (7) (9) (21) (27)
Non-service FAS pension income (expense) 27 13 80 39
Total FAS pension income (expense) $ 24 $ 10 $ 73 $ 29