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Other Long-Term Liabilities Other Long-Term Liabilities (Details) (USD $) In Millions, unless otherwise specified |  |  |  | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Aug. 09, 2013 | Sep. 30, 2014 Energy Right Program | Sep. 30, 2014 Other long-term liabilities | Sep. 30, 2013 Other long-term liabilities | Sep. 30, 2014 Accounts payable and accrued liabilities | Sep. 30, 2013 Accounts payable and accrued liabilities
Other Long-Term Liabilities |  |  |  |  |  |  |  |
Number of days in default |  |  |  | 180 days |  |  |  |
Interest rate swap liabilities | $ 1,348 | $ 1,199 |  |  | $ 1,348 | $ 1,199 |  |
Environmental agreements liability |  |  |  |  | 108 | 190 |  |
EnergyRight financing obligation | 215 | 222 |  |  | 152 | 149 | 38 | 37
Membership interests of VIE subject to mandatory redemption |  |  |  |  | 37 | 38 |  |
Commodity contract derivative liabilities |  |  |  |  | 17 | 35 |  |
Commodity swap derivative liabilities |  |  |  |  | 14 | 36 |  |
Currency swap liabilities | 15 | 15 |  |  | 15 | 15 |  |
Other |  |  |  |  | 271 | 199 |  |
Total other long-term liabilities | 1,962 | 1,861 |  |  |  |  |  |
Percentage of membership interests issued |  |  | 100.00% |  |  |  |  |
Membership interests of VIE subject to mandatory redemption | 50 | 50 | 40 |  |  |  |  |
SCCG balloon payment |  |  | 4 |  |  |  |  |
Membership interests of VIE subject to mandatory redemption, interest rate, stated percentage |  |  | 7.00% |  |  |  |  |
Membership interests of VIE subject to mandatory redemption, amount, current | $ 2 | $ 2 |  |  |  |  |  |

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- Definition Carrying amount as of the balance sheet date of the liability arising from commodity contracts such as futures contracts tied to the movement of a particular commodity, which are expected to be converted into cash or otherwise disposed of after a year or beyond the normal operating cycle, if longer. + References No definition available. + Details
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