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ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
AOCI Attributable to Parent, Net of Tax |  |  |
Beginning balance, tax effect | $ 782 | $ 1,184 | $ 1,764
Beginning balance | 6,582 | 3,887 | 1,534
Changes in value, tax effect | 71 | (330) | (484)
Changes in value (net of tax effect) | (233) | 1,089 | 1,593
Reclassifications into earnings, tax effect | (57) | (72) | (96)
Reclassification into earnings (net of tax effect) | 189 | 240 | 315
Ending balance, tax effect | 796 | 782 | 1,184
Ending balance | 11,105 | 6,582 | 3,887
Deferred income tax expense in AOCI that will not be recognized until obligation is fully extinguished | 755 | 755 | 755
Accumulated Other Comprehensive Loss |  |  |
AOCI Attributable to Parent, Net of Tax |  |  |
Beginning balance | (5,801) | (7,130) | (9,038)
Ending balance | (5,845) | (5,801) | (7,130)
Pension and Other Benefits Liabilities |  |  |
AOCI Attributable to Parent, Net of Tax |  |  |
Beginning balance, AOCI before tax | (6,624) | (8,355) | (10,843)
Changes in value | (303) | 1,419 | 2,077
Reclassifications into earnings | 246 | 312 | 411
Ending balance, AOCI before tax | (6,681) | (6,624) | (8,355)
Other |  |  |
AOCI Attributable to Parent, Net of Tax |  |  |
Beginning balance, AOCI before tax | 41 | 41 | 41
Changes in value | (1) | 0 | 0
Reclassifications into earnings | 0 | 0 | 0
Ending balance, AOCI before tax | $ 40 | $ 41 | $ 41

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