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Revenue Local Power Company Contracts (Details) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2024 USD ($) Units | Jun. 30, 2024 USD ($) Units
Long-term Contract for Purchase of Electric Power [Line Items] |  |
Total long-duration contracts revenue recognition | $ | 2,596 | 7,925
Total percentage of operating revenues | 90.20% | 90.10%
Number of LPCs signed LTA | 147 | 147
Total Number of LPCs | 153 | 153
5-year Termination Notice [Member] |  |
Long-term Contract for Purchase of Electric Power [Line Items] |  |
Revenues | $ | $ 369 | $ 1,060
Percentage of total operating revenues | 12.80% | 12.10%
Number of LPCs signed LTA | 6 | 6
20-year Termination Notice [Member] |  |
Long-term Contract for Purchase of Electric Power [Line Items] |  |
Revenues | $ | $ 2,227 | $ 6,865
Percentage of total operating revenues | 77.40% | 78.00%
Number of LPCs signed LTA | 147 | 147

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