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Other Long-Term Liabilities Other Long-Term Liabilities (Tables) | 12 Months Ended
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Sep. 30, 2018
Other Liabilities, Noncurrent [Abstract] |
Other Long-Term Liabilities | The table below summarizes the types and amounts of Other long-term liabilities:
Other Long-Term Liabilities At September 30
| 2018 |  | 2017
Interest rate swap liabilities | $ | 1,122 |  |  | $ | 1,418 |
Gallatin coal combustion residual facilities liability | 862 |  |  | 880 |
Capital lease obligations | 178 |  |  | 182 |
Currency swap liabilities | 81 |  |  | 92 |
EnergyRight® financing obligation | 102 |  |  | 115 |
Environmental agreements liability | 11 |  |  | 13 |
Membership interests of VIE subject to mandatory redemption | 28 |  |  | 30 |
Commodity contract derivative liabilities | 8 |  |  | 9 |
Other | 323 |  |  | 316 |
Total other long-term liabilities | $ | 2,715 |  |  | $ | 3,055 |

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