Income Taxes - EEGH (Details)	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory income tax rate	21.00%	21.00%	21.00%	21.00%
State income tax, net of federal income tax impacts	(1.00%)	4.00%	0.00%	2.00%
Equity interest	(1.00%)	0.00%	(1.00%)	(2.00%)
Noncontrolling interest	(1.00%)	(1.00%)	(2.00%)	(2.00%)
Other	1.00%	0.00%	0.00%	1.00%
Effective income tax rate	5.00%	12.00%	(13.00%)	(8.00%)
EEGH
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory income tax rate	21.00%	21.00%	21.00%	21.00%
State income tax, net of federal income tax impacts	3.00%	2.00%	4.00%	3.00%
Equity interest	1.00%	1.00%	1.00%	1.00%
Effects of ratemaking	0.00%	(1.00%)	(2.00%)	(1.00%)
Noncontrolling interest	(10.00%)	(12.00%)	(10.00%)	(11.00%)
Other	0.00%	2.00%	0.00%	0.00%
Effective income tax rate	15.00%	13.00%	14.00%	13.00%
EEGH \| Cove Point LNG, LP
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Ownership interest			75.00%

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 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 applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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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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