FAIR VALUE MEASUREMENTS (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023
Black Butte Coal Company
Fair value of assets and liabilities
Impairment of equity method investment		$ 29
Land
Fair value of assets and liabilities
Impairment and related charges	$ 334	$ 180

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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