INVESTMENTS AND RELATED PARTY TRANSACTIONS - Schedule of Changes Investments in Unconsolidated Subsidiaries (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Equity Method Investments [Roll Forward]
Beginning balance			$ 86
Net (loss) income	$ (2)	$ (2)	(3)	$ (9)
Ending balance	102		102
Carbon TerraVault JV
Equity Method Investments [Roll Forward]
Beginning balance			27
Net (loss) income	(2)	$ (3)	(4)	$ (10)
Contributions			26
Ending balance	49		49
Midway Sunset Cogeneration Company
Equity Method Investments [Roll Forward]
Beginning balance			59
Adjustment to the preliminary purchase price allocation in the Aera Merger			(7)
Net (loss) income			1
Ending balance	$ 53		$ 53