Organization and Operations - EEGH (Details) - EEGH	12 Months Ended
	Dec. 31, 2021 mi
Iroquois Gas Transmission System, L.P.
Variable Interest Entity [Line Items]
Variable interest entity, ownership percentage	50.00%
Primary Beneficiary | General Partner | Cove Point LNG, LP
Variable Interest Entity [Line Items]
Variable interest entity, ownership percentage	100.00%
Primary Beneficiary | Limited Partner | Cove Point LNG, LP
Variable Interest Entity [Line Items]
Variable interest entity, ownership percentage	25.00%
Primary Beneficiary | FERC | Iroquois Gas Transmission System, L.P.
Variable Interest Entity [Line Items]
Miles of interstate natural gas transportation pipeline	416