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Related Parties Related Parties (Tables) | 12 Months Ended
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Sep. 30, 2016
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
| 2016 |  | 2015 |  | 2014
Revenue from sales of electricity | $ | 126 |  |  | $ | 130 |  |  | $ | 128 |
Other income | 161 |  |  | 167 |  |  | 137 |
Expenditures |  |  |  |  |  |  |  |
Operating expenses | 216 |  |  | 227 |  |  | 267 |
Additions to property, plant, and equipment | 32 |  |  | 37 |  |  | 19 |
Cash and cash equivalents | 54 |  |  | 45 |  |  | 35 |
Accounts receivable, net | 129 |  |  | 106 |  |  | 85 |
Accounts payable and accrued liabilities | 77 |  |  | 98 |  |  | 146 |
Long-term power bonds, net | 4 |  |  | 5 |  |  | 3 |
Return on Power Program Appropriation Investment | 6 |  |  | 5 |  |  | 4 |
Return of Power Program Appropriation Investment | — |  |  | — |  |  | 10 |

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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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