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INVESTMENTS AND RELATED PARTY TRANSACTIONS - Changes Investments in Unconsolidated Subsidiaries (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Equity Method Investments [Roll Forward]
Equity Method Investments, Beginning Balance		$ 19
Income (loss) from investment in unconsolidated subsidiary		(10)	$ (9)	$ (1)
Equity Method Investments, Ending Balance	$ 86	86	19
Midway Sunset Cogeneration Company
Equity Method Investments [Roll Forward]
Income (loss) from investment in unconsolidated subsidiary	2
Distributions	(2)
Equity Method Investments, Ending Balance	59	59
Carbon TerraVault JV
Equity Method Investments [Roll Forward]
Equity Method Investments, Beginning Balance		19	13
Income (loss) from investment in unconsolidated subsidiary		(12)	(9)
Contributions		20	15
Equity Method Investments, Ending Balance	$ 27	$ 27	$ 19	$ 13

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