Regulatory Matters - GAS Virginia Natural Gas (Details) - Virginia Natural Gas - USD ($) $ in Millions	Jun. 07, 2023	Jan. 01, 2023
Public Utilities, General Disclosures [Line Items]
Approved rate increase (decrease)	$ 48
Public utilities, approved return on equity percentage	9.70%
Public utilities, approved equity capital structure percentage	49.06%
Requested rate increase (decrease) amount		$ 69