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Face (par) amount of debt instrument at time of issuance.

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Weighted average interest rate of debt outstanding.

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For an unclassified balance sheet, amount of receivables due from an entity that is affiliated with the reporting entity by means of direct or indirect ownership.

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Amount of payable due to an entity that is affiliated with the reporting entity by means of direct or indirect ownership.

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Portion of the carrying amount as of the balance sheet date of obligations due all related parties that is payable after one year or beyond the normal operating cycle if longer.

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Aggregate amount of interest expense on all borrowings.

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Amount of interest income earned from interest-bearing assets owed to the entity by related party.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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For an unclassified balance sheet, amounts due from parties associated with the reporting entity as evidenced by a written promise to pay.

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The distributions of earnings to an entity that is affiliated with the reporting entity by means of direct or indirect ownership.

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The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

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Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

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Related Party Transactions - EEGH - Narrative (Details) - USD ($)	1 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Feb. 28, 2021
Related Party Transaction [Line Items]
Credit facilities		$ 11,281,000,000	$ 11,030,000,000
Par value		49,746,000,000
EEGH
Related Party Transaction [Line Items]
Distributions		0	4,323,000,000	$ 457,000,000
Par value		3,934,000,000
Affiliated entity \| EEGH
Related Party Transaction [Line Items]
Related party revenue		32,000,000	4,000,000
Interest income, related party			3,000,000
Affiliated entity \| EEGH \| Other Assets Due From Affiliates
Related Party Transaction [Line Items]
Receivables from affiliates		3,000,000	7,000,000
Affiliated entity \| EEGH \| Natural Gas Imbalance \| Other current liabilities
Related Party Transaction [Line Items]
Due to affiliate		5,000,000
Affiliated entity \| Northeast Midstream \| Northeast Midstream Promissory Note
Related Party Transaction [Line Items]
Interest charges				10,000,000
Atlantic Coast Pipeline \| Affiliated entity \| EGTS
Related Party Transaction [Line Items]
Related party revenue			46,000,000	103,000,000
East Ohio and Eastern Gathering and Processing, Inc. \| Affiliated entity \| EEGH
Related Party Transaction [Line Items]
Interest income, related party				14,000,000
Dominion Energy, Inc. \| Affiliated entity \| EEGH
Related Party Transaction [Line Items]
Notes receivable, related parties				1,800,000,000
Distributions			4,300,000,000	603,000,000
Dominion Energy, Inc. \| Affiliated entity \| EEGH \| Notes Receivable
Related Party Transaction [Line Items]
Interest income, related party			32,000,000	5,000,000
Dominion Energy, Inc. \| Affiliated entity \| EEGH \| Eastern Energy and DEI Intercompany Revolving Credit Agreement
Related Party Transaction [Line Items]
Interest charges			3,000,000	3,000,000
Dominion Energy, Inc. \| Affiliated entity \| Cove Point LNG, LP
Related Party Transaction [Line Items]
Interest income, related party				82,000,000
Dominion Energy, Inc. \| Affiliated entity \| Cove Point LNG, LP \| Cove Point Term Loan
Related Party Transaction [Line Items]
Repayments of long-term lines of credit	$ 3,000,000,000
Dominion Energy, Inc. \| Affiliated entity \| CPMLP Holdings Company, LLC
Related Party Transaction [Line Items]
Interest charges				94,000,000
East Ohio \| Affiliated entity \| EEGH
Related Party Transaction [Line Items]
Notes receivable, related parties				1,700,000,000
East Ohio \| Affiliated entity \| EEGH \| Notes Receivable
Related Party Transaction [Line Items]
Interest income, related party			33,000,000	72,000,000
Dominion Energy Services, Inc. \| Affiliated entity \| CPMLP Holdings Company, LLC
Related Party Transaction [Line Items]
Interest charges			3,000,000	$ 3,000,000
BHE \| Affiliated entity \| EEGH
Related Party Transaction [Line Items]
Cash (received from) paid to BHE for federal and state income taxes		47,000,000	76,000,000
BHE \| Affiliated entity \| EEGH \| Tax Receivable
Related Party Transaction [Line Items]
Receivables from affiliates		8,000,000	20,000,000
EEGH \| Affiliated entity \| BHE GT&S, LLC \| BHE GT&S and Eastern Energy Intercompany Revolving Credit Agreement
Related Party Transaction [Line Items]
Line of credit, amount drawn		8,000,000	124,000,000
Par value		400,000,000			$ 200,000,000
BHE GT&S, LLC \| Affiliated entity \| EEGH \| Intercompany Revolving Credit Agreement With BHE GT&S
Related Party Transaction [Line Items]
Credit facilities		400,000,000
BHE GT&S, LLC \| Affiliated entity \| EEGH \| Intercompany Revolving Credit Agreement With BHE GT&S \| Line of credit
Related Party Transaction [Line Items]
Line of credit, amount drawn		0	$ 9,000,000
Weighted average interest rate			0.55%
MidAmerican Energy \| Affiliated entity \| EEGH \| Shared Benefit Plan
Related Party Transaction [Line Items]
Due to related parties, noncurrent		$ 95,000,000	$ 115,000,000