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Related Parties Related Parties (Tables) | 12 Months Ended
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Sep. 30, 2015
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
| 2015 |  | 2014 |  | 2013
Revenue from sales of electricity | $ | 130 |  |  | $ | 128 |  |  | $ | 120 |
Other income | 115 |  |  | 120 |  |  | 84 |
Judgment settlement | 52 |  |  | 17 |  |  | 18 |
Expenditures |  |  |  |  |  |  |  |
Operating expenses | 227 |  |  | 267 |  |  | 299 |
Additions to property, plant, and equipment | 37 |  |  | 19 |  |  | 15 |
Cash and cash equivalents | 45 |  |  | 35 |  |  | 38 |
Accounts receivable, net | 106 |  |  | 85 |  |  | 58 |
Accounts payable and accrued liabilities | 98 |  |  | 146 |  |  | 133 |
Long-term power bonds, net | 5 |  |  | 3 |  |  | — |
Return on Power Program Appropriation Investment | 5 |  |  | 4 |  |  | 7 |
Return of Power Program Appropriation Investment | — |  |  | 10 |  |  | 20 |

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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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