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Revenue Local Power Company Contracts (Details) $ in Millions | 3 Months Ended
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Dec. 31, 2024 USD ($) Units
Long-term Contract for Purchase of Electric Power [Line Items] |
Total long-duration contracts revenue recognition | $ | 2,616
Total percentage of operating revenues | 89.60%
Number of LPCs signed LTA | 148
Total Number of LPCs | 153
5-year Termination Notice [Member] |
Long-term Contract for Purchase of Electric Power [Line Items] |
Revenues | $ | $ 344
Percentage of total operating revenues | 11.80%
Number of LPCs signed LTA | 5
20-year Termination Notice [Member] |
Long-term Contract for Purchase of Electric Power [Line Items] |
Revenues | $ | $ 2,272
Percentage of total operating revenues | 77.80%
Number of LPCs signed LTA | 148

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