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Variable Interest Entities (VIEs) - Additional information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Variable Interest Entity [Line Items]
Operating Revenues	$ 3,226	$ 2,642	$ 9,253	$ 7,825
Operation and Maintenance	927	808	2,700	2,415
Long Island ServCo [Member]
Variable Interest Entity [Line Items]
Operating Revenues	167	157	474	449
Operation and Maintenance	$ 167	$ 157	$ 474	$ 449

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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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