Business Acquisitions and Dispositions	12 Months Ended
Business Acquisitions and Dispositions	Dec. 31, 2022
EEGH
Business Acquisition [Line Items]
Business Acquisitions and Dispositions	Business Acquisitions and Dispositions Acquisition of Eastern Energy Gas by BHE In July 2020, DEI entered into an agreement to sell substantially all of its natural gas transmission and storage operations, including Eastern Energy Gas and a 25% limited partnership interest in Cove Point, to BHE. Approval of the transaction under the Hart-Scott-Rodino Act was not obtained within 75 days and DEI and BHE mutually agreed to a dual-phase closing consisting of two separate disposal groups identified as the GT&S Transaction and the proposed sale of Dominion Energy Questar Pipeline, LLC and related entities ("the Questar Pipeline Group") by DEI to BHE pursuant to a purchase and sale agreement entered into on October 5, 2020 ("Q-Pipe Transaction"). In July 2021, Dominion Energy Questar Corporation ("Dominion Questar") and DEI delivered a written notice to BHE stating that BHE and Dominion Questar mutually elected to terminate the Q-Pipe Transaction. Prior to the completion of the GT&S Transaction, Eastern Energy Gas finalized a restructuring whereby Eastern Energy Gas distributed the Questar Pipeline Group and a 50% noncontrolling interest in Cove Point to DEI. This restructuring was accounted for by Eastern Energy Gas as a reorganization of entities under common control and the disposition was reflected as an equity transaction. The disposition was not reported as a discontinued operation as the disposal did not represent a strategic shift in the way management had intended to run the business. In November 2020, the GT&S Transaction was completed and Eastern Energy Gas, with the exception of the Questar Pipeline Group as discussed above, became an indirect wholly-owned subsidiary of BHE. DEI retained a 50% noncontrolling interest in Cove Point as well as the assets and obligations of the pension and other postretirement employee benefit plans associated with the operations sold and relating to services provided before closing. The GT&S Transaction was treated as a deemed asset sale for federal and state income tax purposes and all deferred taxes at Eastern Energy Gas were reset to reflect financial and tax basis differences as of November 1, 2020. See Notes 9 and 16 for more information on the GT&S Transaction. Eastern Energy Gas recorded a distribution of net assets of $699 million, including goodwill of $185 million and $41 million of cash, for the distribution of the Questar Pipeline Group to DEI and recorded an approximately $2.8 billion increase in noncontrolling interests for DEI's retained 50% noncontrolling interest in Cove Point. Additionally, in accordance with the terms of the GT&S Transaction, DEI retained certain assets and liabilities associated with Eastern Energy Gas and settled all affiliated balances. As a result, Eastern Energy Gas recorded a contribution for the reset of deferred taxes of $1.3 billion, net of distributions of $895 million related to the pension and other postretirement employee benefit plans retained by DEI and $107 million related to the settlement of affiliated balances.
EGTS
Business Acquisition [Line Items]
Business Acquisitions and Dispositions	Business Acquisitions and Dispositions Acquisition of EGTS by BHE In July 2020, DEI entered into an agreement to sell substantially all of its natural gas transmission and storage operations, including EGTS, to BHE. In November 2020, the GT&S Transaction was completed and EGTS became an indirect wholly-owned subsidiary of BHE. DEI retained the assets and obligations of the pension and other postretirement employee benefit plans associated with the operations sold and relating to services provided before closing. The GT&S Transaction was treated as a deemed asset sale for federal and state income tax purposes and all deferred taxes at EGTS were reset to reflect financial and tax basis differences as of November 1, 2020. See Notes 10 and 11 for more information on the GT&S Transaction. In accordance with the terms of the GT&S Transaction, DEI retained certain assets and liabilities associated with EGTS and settled all affiliated balances. As a result, EGTS recorded a contribution for the reset of deferred taxes of $1.0 billion and $34 million for retained tax liabilities payable to EGTS by DEI, net of distributions of $904 million related to the pension and other postretirement employee benefit plans retained by DEI and $107 million of other pension related amounts. In addition, EGTS decided to forgo recovery of $18 million of certain property, plant and equipment as a result of the GT&S Transaction, included in disallowance and abandonment of utility plant on the Consolidated Statement of Operations.