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Other Long-Term Liabilities Other Long-Term Liabilities (Details) (USD $) In Millions, unless otherwise specified | Sep. 30, 2013 | Aug. 09, 2013 | Sep. 30, 2012
--- | --- | --- | ---
Other Long-Term Liabilities |  |  |
Interest rate swap liabilities | $ 1,199 |  | $ 1,723
Environmental agreements liability | 190 |  | 237
EnergyRight® financing obligation | 149 |  | 148
Membership interests of VIE subject to mandatory redemption, amount, noncurrent | 38 |  | 0
Coal contract derivative liabilities | 35 |  | 205
Commodity swap derivative liabilities | 36 |  | 59
Currency swap liabilities | 15 |  | 54
Other | 199 |  | 254
Total other long-term liabilities | 1,861 |  | 2,680
Percentage of membership interests issued |  | 100.00% |
Membership interests of VIE subject to mandatory redemption | 40 | 40 | 0
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 |  |
Energy Right Program |  |  |
Other Long-Term Liabilities |  |  |
Number of days in default | 180 days |  |
Energy Right Solutions program obligation | 186 |  | 185
Accounts payable and accrued liabilities | Energy Right Program |  |  |
Other Long-Term Liabilities |  |  |
Energy Right Solutions program obligation | $ 37 |  | $ 37

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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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