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Variable Interest Entities (VIEs) - Additional information (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Variable Interest Entity [Line Items]      
Operating Revenues $ 10,290 $ 11,237 $ 9,800
Operation and Maintenance 3,356 3,150 3,178
Long Island ServCo [Member]      
Variable Interest Entity [Line Items]      
Operating Revenues 592 533 516
Operation and Maintenance $ 592 $ 533 $ 516