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v3.25.1

Revenue (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Mar. 31, 2025 | Mar. 31, 2024
Disaggregation of Revenue [Line Items] |  |  |  |
Regulated Operating Revenue | $ 3,476 | $ 3,093 | $ 6,352 | $ 5,824
Electric revenue | (3,477) | (3,091) | (6,352) | (5,823)
Off System Sales of Electricity | 1 | 2 | 2 | 4
Pre-commercial Ops - capitalized revenue | 2 | 0 | 2 | (3)
Unregulated Operating Revenue | 56 | 61 | 100 | 95
Regulated and Unregulated Operating Revenue | $ 3,532 | 3,154 | $ 6,452 | $ 5,919
Total long duration contract revenue recognition | 3,199 |  | 5,815 |
Percent of wholesale Credit offered |  |  | 310.00% |
Percent of Generation Flexibility Credit |  |  | 5.00% |
NES's % of operating revenues |  |  | 800.00% | 800.00%
Percent of Generation Flexibility Credit |  |  | 5.00% |
MLGW's % of operating revenues |  |  | 700.00% | 700.00%
ALABAMA |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Regulated Operating Revenue | $ 520 | 457 | $ 951 | $ 865
GEORGIA |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Regulated Operating Revenue | 94 | 80 | 168 | 149
KENTUCKY |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Regulated Operating Revenue | 214 | 201 | 396 | 378
MISSISSIPPI |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Regulated Operating Revenue | 307 | 284 | 576 | 539
NORTH CAROLINA |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Regulated Operating Revenue | 28 | 28 | 49 | 51
TENNESSEE |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Regulated Operating Revenue | 2,298 | 2,027 | 4,184 | 3,816
VIRGINIA |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Regulated Operating Revenue | $ 16 | $ 14 | $ 28 | $ 25

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