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ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Accumulated other comprehensive loss | $ (299) | $ (388) | $ (262) | $ (494)
AOCI Tax, Attributable to Parent | 97 | 122 | 83 | 160
Reclassification from AOCI, Current Period, Tax | (7) | (4) | (6) |
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax | 25 | 8 | 21 |
Other Comprehensive Income (Loss), Tax | (18) | 43 | (71) |
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax | 64 | (134) | 211 |
AOCI - Marketable Securities [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
AOCI before Tax, Attributable to Parent | (46) | (104) | (5) | 30
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent | 13 | 9 | (6) |
Other Comprehensive Income (Loss), before Reclassifications, before Tax | 45 | (108) | (29) |
AOCI - Employee Benefit Plan [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
AOCI before Tax, Attributable to Parent | (358) | (421) | (332) | (659)
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent | 19 | 3 | 33 |
Other Comprehensive Income (Loss), before Reclassifications, before Tax | 44 | (92) | 294 |
AOCI - Interest Rate Derivatives [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
AOCI before Tax, Attributable to Parent | 8 | 15 | (8) | $ (25)
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent | 0 | 0 | 0 |
Other Comprehensive Income (Loss), before Reclassifications, before Tax | $ (7) | $ 23 | $ 17 |

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