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PENSION AND OTHER POSTRETIREMENT BENEFITS - Schedule of Fair Value of Pension Plan Assets (Details) - Pension Benefits - USD ($) $ in Millions | Dec. 31, 2025 | Aug. 07, 2025 | Aug. 06, 2025 | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | --- | --- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | $ 2,542 | $ 2,454 | $ 2,369 | $ 2,352 | $ 2,507
Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 1,551 |  |  | 1,668 |
Cash and cash equivalents | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 79 |  |  | (60) |
U.S. treasury securities | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 88 |  |  | 140 |
Government-related securities | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 118 |  |  | 117 |
Corporate bonds | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 988 |  |  | 1,138 |
Mortgage-backed and asset-backed securities | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 81 |  |  | 156 |
Exchange Traded Fund (ETF) | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 4 |  |  |  |
U.S. large capitalization | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 54 |  |  | 43 |
U.S. small capitalization | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 61 |  |  | 67 |
Non-U.S. large capitalization | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 36 |  |  | 25 |
Non-U.S. small capitalization | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value |  |  |  | 2 |
Exchange Traded Fund (ETF) | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 32 |  |  | 32 |
Other | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 10 |  |  | 8 |
Level 1 | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 340 |  |  | 309 |
Level 1 | Cash and cash equivalents | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 65 |  |  | 0 |
Level 1 | U.S. treasury securities | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 88 |  |  | 140 |
Level 1 | Government-related securities | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 0 |  |  | 0 |
Level 1 | Corporate bonds | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 0 |  |  | 0 |
Level 1 | Mortgage-backed and asset-backed securities | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 0 |  |  | 0 |
Level 1 | Exchange Traded Fund (ETF) | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 4 |  |  |  |
Level 1 | U.S. large capitalization | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 54 |  |  | 43 |
Level 1 | U.S. small capitalization | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 61 |  |  | 67 |
Level 1 | Non-U.S. large capitalization | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 36 |  |  | 25 |
Level 1 | Non-U.S. small capitalization | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value |  |  |  | 2 |
Level 1 | Exchange Traded Fund (ETF) | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 32 |  |  | 32 |
Level 1 | Other | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 0 |  |  | 0 |
Level 2 | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 1,211 |  |  | 1,359 |
Level 2 | Cash and cash equivalents | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 14 |  |  | (60) |
Level 2 | U.S. treasury securities | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 0 |  |  | 0 |
Level 2 | Government-related securities | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 118 |  |  | 117 |
Level 2 | Corporate bonds | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 988 |  |  | 1,138 |
Level 2 | Mortgage-backed and asset-backed securities | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 81 |  |  | 156 |
Level 2 | Exchange Traded Fund (ETF) | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 0 |  |  |  |
Level 2 | U.S. large capitalization | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 0 |  |  | 0 |
Level 2 | U.S. small capitalization | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 0 |  |  | 0 |
Level 2 | Non-U.S. large capitalization | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 0 |  |  | 0 |
Level 2 | Non-U.S. small capitalization | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value |  |  |  | 0 |
Level 2 | Exchange Traded Fund (ETF) | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 0 |  |  | 0 |
Level 2 | Other | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 10 |  |  | 8 |
Net Asset Value | Common collective funds | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 772 |  |  | 626 |
Net Asset Value | Limited partnerships | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 5 |  |  | 11 |
Net Asset Value | Mutual funds | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | 214 |  |  | 47 |
Level 3 | Fair Value, Recurring |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Investments, at fair value | $ 0 |  |  | $ 0 |

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