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Variable Interest Entities - Additional Information (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Jun. 30, 2021
Variable Interest Entity [Line Items] |  |  |
Noncontrolling interest | $ 299 | $ 218 |
Clean Energy Businesses |  |  |
Variable Interest Entity [Line Items] |  |  |
Equity method investment |  |  | $ 11
Loss from the project, pre-tax | 11 |  |
Loss from the project, after-tax | 8 |  |
Tax Equity Investors |  |  |
Variable Interest Entity [Line Items] |  |  |
Noncontrolling interest | 95 |  |
Tax Equity Projects | Variable Interest Entity, Primary Beneficiary |  |  |
Variable Interest Entity [Line Items] |  |  |
Income (loss) | (30) | (6) |
Income (loss), after tax | (24) | (4) |
Tax Equity Projects | Tax Equity Investors | Variable Interest Entity, Primary Beneficiary |  |  |
Variable Interest Entity [Line Items] |  |  |
Income (loss) | 6 | 43 |
Income (loss), after tax | 4 | $ 32 |
CED Nevada Virginia | Con Edison Development |  |  |
Variable Interest Entity [Line Items] |  |  |
Loss from the project, pre-tax | 155 |  |
Loss from the project, after-tax | 117 |  |
CED Nevada Virginia | Tax Equity Investors |  |  |
Variable Interest Entity [Line Items] |  |  |
Loss from the project, pre-tax | 158 |  |
Loss from the project, after-tax | $ 119 |  |

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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109237563&loc=d3e33749-111570 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8813-108599 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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