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v3.25.3

Related Parties Related Parties (Tables) | 12 Months Ended
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Sep. 30, 2025
Related Party Transactions [Abstract] |
Related Party Transactions | Transactions with agencies of the federal government were as follows:
Related Party Transactions At or for the years ended September 30 (in millions)
| 2025 |  | 2024 |  | 2023
Revenue from sales of electricity | $ | 132 |  |  | $ | 118 |  |  | $ | 120 |
Other income | 309 |  |  | 273 |  |  | 282 |
Expenditures |  |  |  |  |
Operating expenses | 264 |  |  | 241 |  |  | 234 |
Additions to property, plant, and equipment | 13 |  |  | 12 |  |  | 8 |
Cash and cash equivalents | 31 |  |  | 31 |  |  | 31 |
Accounts receivable, net | 89 |  |  | 81 |  |  | 87 |
Investment funds | 534 |  |  | 495 |  |  | 391 |
Long-term accounts receivable | 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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- Definition Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 850 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483326/850-10-50-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 850 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483326/850-10-50-1 + Details
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