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v3.25.3

Related Parties Related Parties (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2023
Related Parties |  |  |
Other income | $ 189 | $ 191 | $ 166
Long-term Investments | 5,573 | 4,968 |
Return on power program appropriation investment | (8) | (7) | (6)
Related Party Transactions |  |  |
Related Parties |  |  |
Revenue from sales of electricity | 132 | 118 | 120
Other income | 309 | 273 | 282
Operating expenses | 264 | 241 | 234
Additions to property, plant, and equipment | 13 | 12 | 8
Cash and cash equivalents | 31 | 31 | 31
Receivables from Customers | 89 | 81 | 87
Long-term Investments | 534 | 495 | 391
Receivables, Long-term Contracts or Programs | 43 | 35 | 38
Accounts payable and accrued liabilities | 41 | 45 | 42
Long-term power bonds, net | 4 | 3 | 1
Return on power program appropriation investment | $ (8) | $ (7) | $ (6)

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