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Other Long-Term Liabilities | 12 Months Ended
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Sep. 30, 2011
Other Liabilities Disclosure [Abstract] |
Other Long-Term Liabilities | Other Long-Term Liabilities Other long-term liabilities consist primarily of liabilities related to certain derivative agreements as well as liabilities under the Environmental Agreements (see Note 20 — Legal Proceedings — Environmental Agreements). The table below summarizes the types and amounts of liabilities:
Other Long-Term Liabilities At September 30
| 2011 |  | 2010
Currency swap liabilities | $ | 131 |  |  | $ | 81 |
Swaption liability | 1,077 |  |  | 804 |
Interest rate swap liabilities | 463 |  |  | 371 |
Coal contract derivative liabilities | 119 |  |  | 2 |
Commodity swap derivative liabilities | 78 |  |  | 118 |
Environmental agreements liability | 346 |  |  | — |
Other long-term liabilities | 191 |  |  | 150 |
Total other long-term liabilities | $ | 2,405 |  |  | $ | 1,526 |
The swaption and interest rate swap liabilities increased during 2011 due primarily to a decrease in interest rates. See Note 13 — Derivatives Not Receiving Hedge Accounting Treatment for a discussion related to changes affecting coal contract derivative liabilities.

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- Definition The entire disclosure for other liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 24 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20,24) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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