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DERIVATIVE FINANCIAL INSTRUMENTS - Cash Flow (Details) MMBTU in Millions, $ in Millions | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
May 31, 2024 USD ($) | Dec. 31, 2022 USD ($) | Sep. 30, 2022 USD ($) | Jun. 30, 2025 USD ($) MMBTU | Jun. 30, 2024 USD ($) | Jun. 30, 2025 USD ($) MMBTU | Jun. 30, 2024 USD ($) | Dec. 31, 2020 USD ($)
Derivative [Line Items] |  |  |  |  |  |  |  |
Recognized gain |  |  |  |  |  | $ 1 |  |
Unrecognized gain included in AOCI |  |  |  |  |  | $ 28 |  |
5.700% senior notes, net of discount and financing fees, due 2034 |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Long-term debt, percentage rate | 5.70% |  |  | 5.70% |  | 5.70% |  |
Energy Related Derivative | Cash Flow Hedging |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Derivative, nonmonetary notional amount | MMBTU |  |  |  | 6 |  | 6 |  |
Loss reclassified from AOCI |  |  |  |  |  | $ 1 |  |
Amount of gain recognized in earnings |  |  |  | $ 7 | $ (6) | 5 | $ (12) |
Unrealized Gain (Loss) on Derivatives |  |  |  |  |  | $ (1) |  |
Treasury interest rate lock |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Derivative, notional amount |  |  |  |  |  |  |  | $ 175
Term of derivatives (in years) |  |  |  |  |  | 10 years |  |
Derivative, fixed interest rate |  |  |  |  |  |  |  | 0.994%
Amount of gain recognized in earnings |  |  | $ 6 |  |  |  |  |
Cash received upon settlement |  | $ 37 |  |  |  |  |  |
Amortized portion part of interest expense for future issuance of debt | $ 31 | $ 31 |  |  |  |  |  |
Euro Member Countries, Euro | Foreign exchange forward contracts |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Derivative, notional amount |  |  |  | 119 |  | $ 119 |  |
U.S. | Foreign exchange forward contracts |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Derivative, notional amount |  |  |  | $ 147 |  | $ 147 |  |

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