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Debt and Other Obligations (Tables) | 6 Months Ended
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Mar. 31, 2013
Debt and Other Obligations [Abstract] |
Debt Outstanding | Total debt outstanding at March 31, 2013, and September 30, 2012, consisted of the following:
Debt Outstanding
| At March 31, 2013 |  | At September 30, 2012
Short-term debt |  |  |
Short-term debt, net | $ | 2,045 |  |  | $ | 1,507 |
Current maturities of long-term debt of variable interest entities | 13 |  |  | 13 |
Current maturities of power bonds | 1,242 |  |  | 2,308 |
Total current debt outstanding, net | 3,300 |  |  | 3,828 |
Long-term debt |  |  |  |  |
Long-term debt of variable interest entities | 975 |  |  | 981 |
Long-term power bonds | 21,042 |  |  | 20,330 |
Unamortized discounts, premiums and other | (83 | ) |  | (61 | )
Total long-term debt, net | 21,934 |  |  | 21,250 |
Total outstanding debt | $ | 25,234 |  |  | $ | 25,078 |
Debt Securities Activity | The table below summarizes the long-term debt securities activity for the period from October 1, 2012, to March 31, 2013.
Debt Securities Activity
| Date |  | Amount |  | Interest Rate
Issues |  |  |  |  |
2012 Series B(1) | December 2012 |  | $ | 1,000 |  |  | 3.50 | %
electronotes® | Second Quarter 2013 |  | 92 |  |  | 3.21 | %
Discount on debt issues |  |  | (25 | ) |  |
Total long-term debt issuances |  |  | $ | 1,067 |  |  |
Redemptions/Maturities(2) |  |  |  |  |
2009 Series A | November 2012 |  | $ | 2 |  |  | 2.25 | %
2009 Series B | December 2012 |  | 1 |  |  | 3.77 | %
1998 Series C | March 2013 |  | 1,359 |  |  | 6.00 | %
electronotes® | First Quarter 2013 |  | 8 |  |  | 4.91 | %
electronotes® | Second Quarter 2013 |  | 17 |  |  | 4.98 | %
Total redemptions/maturities |  |  | $ | 1,387 |  |  |
Notes (1) The 2012 Series B bonds were issued at 97.49 percent of par. (2) All redemptions were at 100 percent of par.

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- Definition Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21521-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(e),(f)) -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21538-112644 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644 + Details
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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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