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STOCKHOLDERS' EQUITY - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning balance | $ 2,219 | $ 1,864 | $ 1,688
Total recorded in accumulated other comprehensive income, before tax | 76 | 71 | 85
Income tax (provision) benefit | (1) | 3 | (4)
Ending balance | 3,538 | 2,219 | 1,864
Accumulated Other Comprehensive Income |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning balance | 74 | 81 | 72
Ending balance | 75 | 74 | 81
Actuarial gain (loss) associated with pension and postretirement |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Reclassification from AOCI, before tax | 4 | (2) | 18
Prior service credit |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Reclassification from AOCI, before tax | 3 | 0 | 0
Recognition of prior service credit due to curtailment |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Reclassification from AOCI, before tax | 0 | (3) | 0
Recognition of net actuarial gain due to curtailment |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Reclassification from AOCI, before tax | (4) | 0 | 0
Recognition of net actuarial loss due to special termination benefits |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Reclassification from AOCI, before tax | 4 | 0 | 0
Amortization of prior service credit |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Reclassification from AOCI, before tax | (5) | (5) | (5)
Other comprehensive income (loss) |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Reclassification from AOCI, before tax | $ 2 | $ (10) | $ 13

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