Regulatory Matters (Narrative) (Detail 2) - North Carolina Regulation - USD ($) $ in Millions	1 Months Ended
	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