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v3.22.4

Revenue Customer Type (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2022 USD ($) Units | Dec. 31, 2021 USD ($) | Sep. 30, 2023 USD ($)
Revenue, Major Customer [Line Items] |  |  |
MLGW's % of operating revenues | 800.00% |  |
NES's % of operating revenues | 800.00% |  |
Sales of Electricity | $ 2,963 | $ 2,538 |
Electric revenue | 2,959 | 2,537 |
Off System Sales of Electricity | 4 |  |
Other revenue | 52 | 45 |
Revenues | 3,015 | 2,583 |
Bill credits for LTA | $ (48) | (43) |
Number of LPCs signed LTA | Units | 147 |  |
Number of LPCs signed Flexibility Agreement | Units | 81 |  |
Percent of sales of electricity to LPCs | 91.00% |  |
Pandemic Relief Credit | $ (53) | (50) |
Forecast |  |  |
Revenue, Major Customer [Line Items] |  |  |
Pandemic Relief Credit |  |  | $ 230
lpcs [Domain] |  |  |
Revenue, Major Customer [Line Items] |  |  |
Electric revenue | 2,706 | 2,306 |
industries directly served [Domain] |  |  |
Revenue, Major Customer [Line Items] |  |  |
Electric revenue | 225 | 205 |
federal agencies and other [Domain] |  |  |
Revenue, Major Customer [Line Items] |  |  |
Electric revenue | 32 | 27 |
ALABAMA |  |  |
Revenue, Major Customer [Line Items] |  |  |
Electric revenue | 428 | 371 |
GEORGIA |  |  |
Revenue, Major Customer [Line Items] |  |  |
Electric revenue | 76 | 64 |
KENTUCKY |  |  |
Revenue, Major Customer [Line Items] |  |  |
Electric revenue | 198 | 171 |
MISSISSIPPI |  |  |
Revenue, Major Customer [Line Items] |  |  |
Electric revenue | 278 | 241 |
NORTH CAROLINA |  |  |
Revenue, Major Customer [Line Items] |  |  |
Electric revenue | 25 | 20 |
TENNESSEE |  |  |
Revenue, Major Customer [Line Items] |  |  |
Electric revenue | 1,941 | 1,659 |
VIRGINIA |  |  |
Revenue, Major Customer [Line Items] |  |  |
Electric revenue | $ 13 | $ 11 |

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