Investments and Restricted Cash and Cash Equivalents and Investments - EEGH - Narrative (Details) - EEGH - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Investments And Restricted Cash And Investments [Line Items]
Investment exceeded share of equity in net assets	$ 130		$ 130
Distributions received from investments	$ 26	$ 11
Iroquois Gas Transmission System, L.P.
Investments And Restricted Cash And Investments [Line Items]
Equity method investment, ownership percentage	50.00%

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No definition available.

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