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v3.22.2

Variable Interest Entities (VIEs) (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
Variable Interest Entity [Line Items] |  |  |  |  |
Operating Revenues | $ 2,076 | $ 1,874 | $ 4,389 | $ 4,763 |
Operation and Maintenance | 751 | 783 | 1,545 | 1,561 |
Long Island ServCo [Member] |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Operating Revenues | 129 | 129 | 252 | 252 |
Operation and Maintenance | 129 | $ 129 | 252 | $ 252 |
Ocean Wind JV Holdco |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount | 165 |  | 165 |  | $ 111
Ocean Wind JV Holdco | Anticipated Spend |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount | $ 100 |  | $ 100 |  |

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