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Summary of Significant Accounting Policies and Other Matters - Narrative (Details) $ in Millions | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Jun. 30, 2024 USD ($) project mi | Jun. 30, 2024 USD ($) project shares | Jun. 30, 2024 USD ($) project shares | Mar. 01, 2023 project
Schedule of Equity Method Investments [Line Items] |  |  |  |
Antidilutive shares (in shares) | shares |  | 0 | 0 |
Disposal Group, Held-for-sale, Not Discontinued Operations | Clean Energy Businesses |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Tax equity projects | project | 3 | 3 | 3 | 2
Mountain Valley Pipeline LLC | CET Electric |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Ownership interest (in percent) | 6.70% | 6.70% | 6.70% |
Mountain Valley Pipeline LLC | Con Edison Gas Pipeline and Storage, LLC |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Number of miles in pipeline construction | mi | 303 |  |  |
Aggregate project cost | $ | $ 7,900 | $ 7,900 | $ 7,900 |
Equity method investments | $ | $ 156 | $ 156 | 156 |
Cash contributions for equity method investments | $ |  |  | $ 530 |
Broken Bow II | Clean Energy Businesses | Electric Energy (MWh) |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Deferred projects | project | 1 | 1 | 1 | 1
Broken Bow II | Clean Energy Businesses | Disposal Group, Held-for-sale, Not Discontinued Operations | Clean Energy Businesses |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Number of projects | project |  |  |  | 3

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