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REVENUE - Narrative (Details) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 USD ($) | Dec. 31, 2022 USD ($) company MW | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Disaggregation of Revenue [Line Items] |  |  |  |  |
Utility customer payment period |  |  | 30 days |  |
Total revenues | [1] |  | $ 12,459,000,000 | $ 11,132,000,000 | $ 10,790,000,000
Concentration of risk of accounts receivable |  |  | $ 0 | $ 0 |
Accounts receivable, allowance for credit loss, period increase (Decrease) |  | $ 25,000,000 |  |  | $ (121,000,000)
LateFeeIncomeServicingFinancialAssetStatementOfIncomeOrComprehensiveIncomeExtensibleEnumerationNotDisclosedFlag |  |  | late payment charges | late payment charges | late payment charges
Deferred Regulatory Assets |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Accounts receivable, allowance for credit loss, period increase (Decrease) |  | $ 15,000,000 |  |  |
Other Non-Customer Revenue | Derivative Revenue |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues |  |  | $ 15,000,000 | $ 11,000,000 | $ 14,000,000
Other Non-Customer Revenue | Other revenue unrelated to contracts with customers |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Late payment charges |  |  | $ 38,000,000 | $ 36,000,000 | $ 31,000,000
Utilities and Transmission Companies |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Number of existing utility operating companies | company |  |  | 10 |  |
Plant generation capacity (in MW's) | MW |  |  | 3,580 |  |
[1] | Includes excise and gross receipts tax collections of $406 million, $374 million and $362 million in 2022, 2021 and 2020, respectively.

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