Income Taxes - EEGH (Details) - USD ($)	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory income tax rate	21.00%	21.00%
State income tax, net of federal income tax benefit	(21.00%)	0.00%
Equity interest	15.00%	(1.00%)
Absence of noncontrolling interest	(9.00%)	0.00%
Other, net	1.00%	(1.00%)
Effective income tax rate	(217.00%)	36.00%
Eastern Energy Gas Holdings, LLC [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory income tax rate	21.00%	21.00%
State income tax, net of federal income tax benefit	3.00%	3.00%
Equity interest	2.00%	1.00%
Effects of ratemaking	(1.00%)	(1.00%)
Absence of noncontrolling interest	(11.00%)	(3.00%)
Other, net	(1.00%)	1.00%
Effective income tax rate	13.00%	22.00%
Eastern Energy Gas Holdings, LLC [Member] \| BHE [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Related party transaction, cash paid for income taxes, net	$ 0
Eastern Energy Gas Holdings, LLC [Member] \| Cove Point LNG, LP [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Ownership interest	75.00%	25.00%

Effective Income Tax Rate Reconciliation, Effects Of Ratemaking, Percent

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Schedule of Effective Income Tax Rate Reconciliation [Line Items]

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to equity in earnings (loss) of unconsolidated subsidiaries exempt from income taxes.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to noncontrolling interest income (loss) exempt from income taxes.

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Percentage investment held by members or limited partners of limited liability company (LLC) or limited partnership (LP).

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