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Variable Interest Entities (VIEs) - Additional information (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Variable Interest Entity [Line Items] |  |  |  |
Operating Revenues | $ 2,805 | $ 2,423 | $ 6,027 | $ 5,183
Operation and Maintenance | 854 | 824 | 1,773 | 1,607
Long Island ServCo [Member] |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
Operating Revenues | 155 | 142 | 307 | 292
Operation and Maintenance | $ 155 | $ 142 | $ 307 | $ 292

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