PENSION AND OTHER POSTRETIREMENT BENEFITS - Schedule of Amounts Recognized in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
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| Pension Benefits | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Net actuarial (loss) gain | $ 29 | $ (1,448) |
| Net prior service cost | 0 | (1) |
| Net amount recognized in accumulated other comprehensive income (loss) before tax | 29 | (1,449) |
| Deferred income taxes | (7) | 390 |
| Net amount recognized in accumulated other comprehensive income (loss) | 22 | (1,059) |
| Postretirement Benefits | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Net actuarial (loss) gain | (1) | 147 |
| Net prior service cost | 0 | 0 |
| Net amount recognized in accumulated other comprehensive income (loss) before tax | (1) | 147 |
| Deferred income taxes | 0 | (14) |
| Net amount recognized in accumulated other comprehensive income (loss) | $ (1) | $ 133 |
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- Definition Deferred income taxes relating to amounts recorded in accumulated other comprehensive income associated with pension and postretirement benefit plans. No definition available.
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- Definition Amount, after tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, before tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, before tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, before tax, of accumulated other comprehensive (income) loss for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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