Variable Interest Entities and Noncontrolling Interests - EEGH (Details) - USD ($) $ in Millions	1 Months Ended				12 Months Ended
	Jul. 31, 2021	Jul. 31, 2020	Dec. 31, 2019	Nov. 30, 2019	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
EEGH | Cove Point LNG, LP
Schedule of Equity Method Investments [Line Items]
Noncontrolling interest distributed		25.00%
EEGH | General Partner | Primary Beneficiary | Cove Point LNG, LP
Schedule of Equity Method Investments [Line Items]
Variable interest entity, ownership percentage					100.00%
EEGH | Limited Partner | Primary Beneficiary | Cove Point LNG, LP
Schedule of Equity Method Investments [Line Items]
Variable interest entity, ownership percentage					25.00%
EEGH | Disposed of by means other than sale | GT&S Transaction | Cove Point LNG, LP
Schedule of Equity Method Investments [Line Items]
Noncontrolling interest distributed	50.00%
EEGH | Cove Point LNG, LP | Dominion Energy, Inc.
Schedule of Equity Method Investments [Line Items]
Ownership interest				75.00%
EEGH | Cove Point LNG, LP | Disposed of by means other than sale | GT&S Transaction
Schedule of Equity Method Investments [Line Items]
Noncontrolling interest distributed	50.00%
EEGH | Carolina Gas Services, Inc. | Not Primary Beneficiary
Schedule of Equity Method Investments [Line Items]
Due to related parties					$ 1	$ 7
EEGH | Carolina Gas Services, Inc. | Shared Services | Not Primary Beneficiary
Schedule of Equity Method Investments [Line Items]
Related party amounts of transaction					$ 12	$ 12	$ 12
EEGH | Questar Pipeline Services | Shared Services | Not Primary Beneficiary
Schedule of Equity Method Investments [Line Items]
Related party amounts of transaction							23
EEGH | DES | Shared Services | Not Primary Beneficiary
Schedule of Equity Method Investments [Line Items]
Related party amounts of transaction							$ 90
Dominion Energy, Inc. | Cove Point LNG, LP
Schedule of Equity Method Investments [Line Items]
Ownership interest					50.00%		50.00%
Dominion Energy, Inc. | Cove Point LNG, LP
Schedule of Equity Method Investments [Line Items]
Sold noncontrolling partner interest			25.00%
Brookfield Super-Core Infrastructure Partners | Cove Point LNG, LP
Schedule of Equity Method Investments [Line Items]
Ownership interest					25.00%