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Other Long-Term Liabilities Other Long-Term Liabilities (Details) - USD ($) $ in Millions | Sep. 30, 2018 | Sep. 30, 2017
--- | --- | ---
Other Long-Term Liabilities |  |  |  |
Interest rate swap liabilities | $ 1,199 |  | $ 1,511 |
Capital lease obligations | 263 |  | 302 |
Currency swap liabilities | 94 | [1] | 103 | [2]
EnergyRight financing obligation | 143 |  | 161 |
Non-current regulatory liabilities | 104 |  | 25 |
Total other long-term liabilities | 2,715 |  | 3,055 |
Interest Rate Swap |  |  |  |
Other Long-Term Liabilities |  |  |  |
EnergyRight financing obligation | 77 |  | 93 |
Other long-term liabilities |  |  |  |
Other Long-Term Liabilities |  |  |  |
Interest rate swap liabilities | 1,122 |  | 1,418 |
Gallatin coal combustion residual facilities | 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 |
Accounts payable and accrued liabilities |  |  |  |
Other Long-Term Liabilities |  |  |  |
Gallatin coal combustion residual facilities | 30 |  |  |
EnergyRight financing obligation | $ 25 |  | $ 29 |
[1] | TVA records currency swaps net of cash collateral received from or paid to the counterparty, to the extent such amount is not recorded in Accounts payable and accrued liabilities. See Note 15 — Offsetting of Derivative Assets and Liabilities.
[2] | Due to the right of setoff and method of settlement, TVA elects to record commodity derivatives under the FTP based on its net commodity position with the counterparty or FCM. Deposits are made to TVA's margin cash accounts held with each FCM to offset any net liability positions in full for derivatives that are transacted with FCMs. TVA records currency swaps net of any cash collateral received from or paid to the counterparty, to the extent such amount is not recorded in Accounts payable and accrued liabilities. See Note 15 — Offsetting of Derivative Assets and Liabilities.

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