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POSTRETIREMENT BENEFIT PLANS (Tables)
9 Months Ended
Sep. 25, 2022
Retirement Benefits [Abstract]  
Schedule of Pretax Net Periodic Benefit Cost The pretax FAS income (expense) related to our qualified defined benefit pension plans and retiree medical and life insurance plans consisted of the following (in millions):
 Quarters EndedNine Months Ended
 September 25,
2022
September 26,
2021
September 25,
2022
September 26,
2021
Qualified defined benefit pension plans
Operating:
Service cost$(20)$(26)$(68)$(80)
Non-operating:
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 (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)$(1,465)
Retiree medical and life insurance plans
Operating:
Service cost$(3)$(3)$(7)$(10)
Non-operating:
Interest cost (12)(13)(36)(39)
Expected return on plan assets 34 35 102 105 
Recognized net actuarial gains12 — 35 — 
Amortization of prior service costs (7)(9)(21)(27)
Non-service FAS retiree medical and life
   income
27 13 80 39 
Total FAS retiree medical and life income$24 $10 $73 $29