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Variable Interest Entities - HLVB Method of Accounting (Details) - Variable Interest Entity, Primary Beneficiary - Clean Energy Businesses - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2022
CED Nevada Virginia | Tax Equity Investors |  |
Variable Interest Entity [Line Items] |  |
Income (loss) before tax |  | $ (42)
Net income (loss) |  | (32)
CED Nevada Virginia | Con Edison Development |  |
Variable Interest Entity [Line Items] |  |
Income (loss) before tax |  | 39
Net income (loss) |  | 29
Tax Equity Projects | Tax Equity Investors |  |
Variable Interest Entity [Line Items] |  |
Income (loss) before tax | $ (1) | (7)
Net income (loss) | (1) | (5)
Tax Equity Projects | Con Edison Development |  |
Variable Interest Entity [Line Items] |  |
Income (loss) before tax | 18 | 28
Net income (loss) | $ 13 | $ 21

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