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STOCKHOLDERS' EQUITY - Schedule of Changes in the Balance of AOCL, Net of Tax (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 28, 2025 | Sep. 29, 2024 | Sep. 28, 2025 | Sep. 29, 2024
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Beginning Balance | $ 5,334 | $ 6,175 | $ 6,333 | $ 6,835
Other comprehensive income before reclassifications |  |  | 116 | 23
Amounts reclassified from AOCL |  |  |  |
Total reclassified from AOCL |  |  | 234 | 87
Other comprehensive income, net of tax | 55 | 76 | 350 | 110
Ending Balance | 6,181 | 7,200 | 6,181 | 7,200
AOCL |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Beginning Balance | (8,157) | (8,769) | (8,452) | (8,803)
Amounts reclassified from AOCL |  |  |  |
Other comprehensive income, net of tax | 55 | 76 | 350 | 110
Ending Balance | (8,102) | (8,693) | (8,102) | (8,693)
Postretirement Benefit Plans |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Beginning Balance |  |  | (8,288) | (8,704)
Other comprehensive income before reclassifications |  |  | 0 | 0
Amounts reclassified from AOCL |  |  |  |
Total reclassified from AOCL |  |  | 193 | 57
Other comprehensive income, net of tax |  |  | 193 | 57
Ending Balance | (8,095) | (8,647) | (8,095) | (8,647)
Total reclassified from AOCL | 65 | 19 |  |
Amortization of net actuarial losses |  |  |  |
Amounts reclassified from AOCL |  |  |  |
Total reclassified from AOCL |  |  | 165 | 141
Total reclassified from AOCL | 55 | 47 |  |
Amortization of net prior service credits |  |  |  |
Amounts reclassified from AOCL |  |  |  |
Total reclassified from AOCL |  |  | 28 | (84)
Total reclassified from AOCL | 10 | (28) |  |
Other, net |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Beginning Balance |  |  | (164) | (99)
Other comprehensive income before reclassifications |  |  | 116 | 23
Amounts reclassified from AOCL |  |  |  |
Total reclassified from AOCL |  |  | 41 | 30
Other comprehensive income, net of tax |  |  | 157 | 53
Ending Balance | $ (7) | $ (46) | (7) | (46)
Other |  |  |  |
Amounts reclassified from AOCL |  |  |  |
Total reclassified from AOCL |  |  | $ 41 | $ 30

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