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v3.25.0.1

Revenue Customer Type (Details) $ in Millions | 3 Months Ended
--- | ---
Dec. 31, 2024 USD ($) Units | Dec. 31, 2023 USD ($)
Revenue, Major Customer [Line Items] |  |
MLGW's % of operating revenues | 800.00% | 800.00%
NES's % of operating revenues | 800.00% | 800.00%
Off System Sales of Electricity | $ 1 | $ 2
Bill credits for LTA | $ (50) | $ (47)
Number of LPCs signed LTA | Units | 148 |
Number of LPCs signed Flexibility Agreement | Units | 102 |
Percent of sales of electricity to LPCs | 91.00% | 91.00%
Pre-commercial Ops - capitalized revenue | $ 0 | $ 3
Regulated Operating Revenue | 2,876 | 2,731
Unregulated Operating Revenue | 44 | 34
Regulated and Unregulated Operating Revenue | 2,920 | 2,765
lpcs [Domain] |  |
Revenue, Major Customer [Line Items] |  |
Regulated Operating Revenue | 2,616 | 2,487
industries directly served [Domain] |  |
Revenue, Major Customer [Line Items] |  |
Regulated Operating Revenue | 230 | 217
federal agencies and other [Domain] |  |
Revenue, Major Customer [Line Items] |  |
Regulated Operating Revenue | 30 | 30
ALABAMA |  |
Revenue, Major Customer [Line Items] |  |
Regulated Operating Revenue | 431 | 408
GEORGIA |  |
Revenue, Major Customer [Line Items] |  |
Regulated Operating Revenue | 74 | 69
KENTUCKY |  |
Revenue, Major Customer [Line Items] |  |
Regulated Operating Revenue | 182 | 177
MISSISSIPPI |  |
Revenue, Major Customer [Line Items] |  |
Regulated Operating Revenue | 269 | 255
NORTH CAROLINA |  |
Revenue, Major Customer [Line Items] |  |
Regulated Operating Revenue | 21 | 23
TENNESSEE |  |
Revenue, Major Customer [Line Items] |  |
Regulated Operating Revenue | 1,886 | 1,789
VIRGINIA |  |
Revenue, Major Customer [Line Items] |  |
Regulated Operating Revenue | $ 12 | $ 11

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- Definition NES's % of operating revenues + References No definition available. + Details
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