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Related Parties Related Parties (Tables) | 12 Months Ended
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Sep. 30, 2018
Related Party Transactions [Abstract] |
Related Party Transactions | Transactions with agencies of the federal government were as follows:
Related Party Transactions For the years ended, or at, September 30
| 2018 |  | 2017 |  | 2016
Revenue from sales of electricity | $ | 122 |  |  | $ | 126 |  |  | $ | 126 |
Other income | 240 |  |  | 136 |  |  | 161 |
Expenditures |  |  |  |  |  |  |  |
Operating expenses | 220 |  |  | 216 |  |  | 216 |
Additions to property, plant, and equipment | 8 |  |  | 16 |  |  | 32 |
Cash and cash equivalents | 46 |  |  | 46 |  |  | 54 |
Accounts receivable, net | 60 |  |  | 84 |  |  | 68 |
Long-term accounts receivable | 46 |  |  | 35 |  |  | 61 |
Accounts payable and accrued liabilities | 69 |  |  | 71 |  |  | 77 |
Long-term power bonds, net | — |  |  | 1 |  |  | 4 |
Return on Power Program Appropriation Investment | 5 |  |  | 5 |  |  | 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 No definition available. + Details
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