Nuclear Decommissioning - Noncurrent Related Party Liabilities (Details) - USD ($) $ in Millions |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Asset Retirement Obligations [Line Items] | ||
| Payables related to Regulatory Agreement Units | $ 4,939 | $ 4,518 |
| Affiliated Entities | ComEd | ||
| Asset Retirement Obligations [Line Items] | ||
| Payables related to Regulatory Agreement Units | 4,032 | 3,780 |
| Affiliated Entities | PECO | ||
| Asset Retirement Obligations [Line Items] | ||
| Payables related to Regulatory Agreement Units | 379 | 247 |
| Affiliated Entities | CenterPoint | ||
| Asset Retirement Obligations [Line Items] | ||
| Payables related to Regulatory Agreement Units | 392 | 365 |
| Affiliated Entities | AEP Texas | ||
| Asset Retirement Obligations [Line Items] | ||
| Payables related to Regulatory Agreement Units | $ 136 | $ 126 |