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POSTRETIREMENT BENEFIT PLANS - Narrative (Details) | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 25, 2022 USD ($) | Sep. 26, 2021 USD ($) | Sep. 25, 2022 USD ($) | Sep. 26, 2021 USD ($) | Dec. 31, 2022 USD ($) | Jun. 24, 2022 USD ($) satellite | Dec. 31, 2021 | Aug. 03, 2021 USD ($)
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |
Recognition of previously deferred postretirement benefit plan amounts, before tax | $ (3,000,000) | $ 137,000,000 | $ 120,000,000 | $ 492,000,000 |  |  |  |
Recognition of previously deferred postretirement benefit plan amounts, net of tax | (2,000,000) | 107,000,000 | 93,000,000 | 387,000,000 |  |  |  |
Outstanding pension benefit obligations and related plan assets |  |  |  |  |  | $ 4,300,000,000 |  | $ 4,900,000,000
Non-cash, non-operating pension settlement charge | 1,500,000,000 |  | 1,500,000,000 | 1,700,000,000 |  |  |  |
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) |  |  | 5,700,000,000 |  |  |  |  |
Other comprehensive income (loss) before reclassifications (a) |  |  | 1,606,000,000 | 2,203,000,000 |  |  |  |
Material contributions to qualified defined benefit pension plans | 0 | 0 | 0 | 0 |  |  |  |
Postretirement Benefit Plans |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |
Other comprehensive income (loss) before reclassifications (a) |  |  | 1,860,000,000 | 2,258,000,000 |  |  |  |
Retiree medical and life insurance plans |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |
Recognition of previously deferred postretirement benefit plan amounts, before tax | 30,000,000 | 6,000,000 | 41,000,000 | 13,000,000 |  |  |  |
FAS pension expense (income) | (27,000,000) | (13,000,000) | (80,000,000) | (39,000,000) |  |  |  |
Qualified defined benefit pension plans |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |
FAS pension expense (income) | $ (111,000,000) | $ 1,572,000,000 | 1,080,000,000 | $ 1,385,000,000 |  |  |  |
Qualified defined benefit pension plans | Postretirement Benefit Plans |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |
Other comprehensive income (loss) before reclassifications (a) |  |  | 1,700,000,000 |  |  |  |  |
Qualified defined benefit pension plans | Forecast |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |
FAS pension expense (income) |  |  |  |  | $ 1,100,000,000 |  |  |
FAS pension expense (income), pretax |  |  |  |  | $ 1,500,000,000 |  |  |
Qualified defined benefit pension plans | Qualified Plan |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |
Outstanding pension benefit obligations and related plan assets |  |  |  |  |  | $ 4,300,000,000 |  | $ 4,900,000,000
Number of retirees and beneficiaries | satellite |  |  |  |  |  | 13,600 |  |
Decrease in defined benefit plan, remeasurements |  |  | 2,200,000,000 |  |  |  |  |
Change in benefit obligation due to remeasurement |  |  | $ 7,900,000,000 |  |  |  |  |
Benefit obligation, discount rate | 4.75% |  | 4.75% |  |  |  | 2.875% |

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