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Equity Method Investment, Reimbursement Amount

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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Amount of income (loss) for proportionate share of equity method investee's income (loss).

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Amount of distribution received from equity method investee for return of investment, classified as investing activities. Excludes distribution for return on investment, classified as operating activities.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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INVESTMENT IN UNCONSOLIDATED SUBSIDIARIES AND RELATED PARTY TRANSACTIONS - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025	Dec. 31, 2024	Jul. 01, 2024	Aug. 31, 2022
Schedule of Equity Method Investments [Line Items]
Investment in unconsolidated subsidiary	$ 98		$ 98		$ 111
Other long-term liabilities	299		299		312
Total operating revenues	1,297	$ 978	1,416	$ 1,890
Equity loss from unconsolidated subsidiaries	2	0	4	1
Distribution from unconsolidated subsidiary	0	0	10	0
Carbon TerraVault JV
Schedule of Equity Method Investments [Line Items]
Total operating revenues	1		1
Carbon TerraVault JV
Schedule of Equity Method Investments [Line Items]
Investment in unconsolidated subsidiary	55	40	55	40	57	$ 27
Interest in joint venture								51.00%
Equity loss from unconsolidated subsidiaries	2	1	3	2
Reimbursement for abandonment work	0	6	0	8
Carbon TerraVault JV \| Related Party
Schedule of Equity Method Investments [Line Items]
Other long-term liabilities	123		123		117
Carbon TerraVault JV \| Brookfield
Schedule of Equity Method Investments [Line Items]
Interest in joint venture								49.00%
Contribution from noncontrolling interest	92		92
Midway Sunset Cogeneration Company
Schedule of Equity Method Investments [Line Items]
Investment in unconsolidated subsidiary	$ 43	$ 53	43	53	$ 54	$ 59
Interest in joint venture							50.00%
Equity loss from unconsolidated subsidiaries			1	$ (1)
Distribution from unconsolidated subsidiary			$ 10
Midway Sunset Cogeneration Company \| Middle River Power, LLC (MRP)
Schedule of Equity Method Investments [Line Items]
Interest in joint venture							50.00%