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Regulatory Matters (Narrative) (Detail 2) - North Carolina Regulation - USD ($) $ in Millions | 1 Months Ended
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Feb. 27, 2025 | Oct. 31, 2024 | Mar. 31, 2024
Rider DSM |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |
Application date |  |  | 2024-03
Increase (Decrease) in customer usage tracker |  |  | $ 31
Virginia Power Base Rate Case |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |
Increase (decrease) in gas cost |  | $ 37 | $ 57
Percentage of earned return |  |  | 5.01%
Authorized return percentage |  | 9.95% | 9.75%
Percentage of proposed earned return |  |  | 10.60%
Virginia Power Base Rate Case | Subsequent Event |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |
Public utilities CCR expenses | $ 6 |  |
Virginia Power Fuel Filing |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |
Increase (Decrease) In fuel component of electric rates |  | $ 107 |

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