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Related Party Transactions (Schedule of related Party Transactions) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Sep. 30, 2024 | Jun. 30, 2024 | Jun. 30, 2024 | Sep. 30, 2024 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Interest Expense | $ 379 | $ 389 | $ 746 | $ 1,125 | $ 1,485 | $ 1,319 | $ 1,117
Affiliated Entity |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Interest income, Related Party [Domain] |  |  |  |  | 12 | 9 | 10
Affiliated Entity | Related Party |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Interest Expense |  |  |  |  | 26 | 36 | 95
Other income |  |  |  |  | 23 | 28 | 17
Electricity, Generation [Member] | Affiliated Entity |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Cost of Sales—Non-Regulated |  |  |  |  | 143 | 576 | 352
Revenue, Related Party, Type [Extensible Enumeration] |  |  |  |  | 746 | 1,055 | 1,093
Electricity | Affiliated Entity |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Cost of Sales—Non-Regulated |  |  |  |  | $ 34 | $ 39 | $ 39

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