Investments and Restricted Cash and Cash Equivalents and Investments - EEGH - Components (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Investments:
Equity method investments	$ 5,597	$ 5,711
Total investments and restricted cash and cash equivalents and investments	10,570	10,763
Reflected as:
Other current assets	1,265	1,253
Noncurrent assets	9,305	9,510
EEGH
Investments:
Investments	16	19
Total investments	285	281
Restricted cash and cash equivalents	25	31
Total investments and restricted cash and cash equivalents and investments	310	312
Reflected as:
Other current assets	25	31
Noncurrent assets	285	281
EEGH \| Customer deposits
Investments:
Restricted cash and cash equivalents	25	31
Iroquois Gas Transmission System, L.P.
Investments:
Equity method investments	605	599
Iroquois Gas Transmission System, L.P. \| EEGH
Investments:
Equity method investments	$ 269	$ 262

Investments, Including Equity Method And Restricted Cash and Investments Classification

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Carrying amount of all investments in debt and equity securities categorized as available-for-sale securities, reported at fair value. Includes restricted cash and investments primarily related to (a) funds held in trust for nuclear decommissioning and (b) debt service requirements that are restricted by certain project debt agreements to be used only for the related project. Includes equity method investments. Includes Rabbi trusts that hold corporate-owned life insurance on certain key executives and directors and represents the cash surrender value, net of any amounts borrowed against the cash surrender value.

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Carrying amount of investments in debt and equity securities categorized as available-for-sale securities, reported at fair value and expected to be used in operations within one year or the normal operating cycle, if longer. Includes restricted cash and investments primarily related to (a) funds held in trust for nuclear decommissioning and (b) debt service requirements that are restricted by certain project debt agreements to be used only for the related project. Includes equity method investments. Includes Rabbi trusts that hold corporate-owned life insurance on certain key executives and directors and represents the cash surrender value, net of any amounts borrowed against the cash surrender value.

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Carrying amount of investments in debt and equity securities categorized as available-for-sale securities, reported at fair value and not expected to be used in operations within one year or the normal operating cycle, if longer. Includes restricted cash and investments primarily related to (a) funds held in trust for nuclear decommissioning and (b) debt service requirements that are restricted by certain project debt agreements to be used only for the related project. Includes equity method investments. Includes Rabbi trusts that hold corporate-owned life insurance on certain key executives and directors and represents the cash surrender value, net of any amounts borrowed against the cash surrender value.

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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Amount of cash and cash equivalents restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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