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Nuclear Decommissioning - Noncurrent Related Party Liabilities (Details) - USD ($) $ in Millions | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Asset Retirement Obligations [Line Items] |  |
Payables related to Regulatory Agreement Units | $ 4,828 | $ 3,688
Affiliated Entities | ComEd |  |
Asset Retirement Obligations [Line Items] |  |
Payables related to Regulatory Agreement Units | 3,983 | 2,955
Affiliated Entities | PECO |  |
Asset Retirement Obligations [Line Items] |  |
Payables related to Regulatory Agreement Units | 338 | 278
Affiliated Entities | CenterPoint |  |
Asset Retirement Obligations [Line Items] |  |
Payables related to Regulatory Agreement Units | 375 | 338
Affiliated Entities | AEP Texas |  |
Asset Retirement Obligations [Line Items] |  |
Payables related to Regulatory Agreement Units | $ 132 | $ 117

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