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Unaudited Quarterly Financial Information | 12 Months Ended
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Sep. 30, 2011
Quarterly Financial Information Disclosure [Abstract] |
Unaudited Quarterly Financial Information | Unaudited Quarterly Financial Information A summary of the unaudited quarterly results of operations for the years 2011 and 2010 follows. This summary should be read in conjunction with the audited financial statements appearing herein. Results for interim periods may fluctuate as a result of seasonal weather conditions, changes in rates, and other factors.
Unaudited Quarterly Financial Information 2011
| First |  | Second |  | Third |  | Fourth |  | Total
Operating revenues | $ | 2,828 |  |  | $ | 2,968 |  |  | $ | 2,657 |  |  | $ | 3,388 |  |  | $ | 11,841 |
Operating expenses | 2,558 |  |  | 2,401 |  |  | 2,575 |  |  | 2,870 |  |  | 10,404 |
Operating income | 270 |  |  | 567 |  |  | 82 |  |  | 518 |  |  | 1,437 |
Net income (loss) | (48 | ) |  | 253 |  |  | (240 | ) |  | 197 |  |  | 162 |
2010
| First |  | Second |  | Third |  | Fourth |  | Total
Operating revenues | $ | 2,349 |  |  | $ | 2,622 |  |  | $ | 2,587 |  |  | $ | 3,316 |  |  | $ | 10,874 |
Operating expenses | 1,878 |  |  | 1,875 |  |  | 2,073 |  |  | 2,806 |  |  | 8,632 |
Operating income | 471 |  |  | 747 |  |  | 514 |  |  | 510 |  |  | 2,242 |
Net income (loss) | 150 |  |  | 430 |  |  | 199 |  |  | 193 |  |  | 972 |
TVA experienced an increase in pension and post-retirement expense, higher operating and maintenance expenses, and an increase in expenses related to outages at nuclear and coal-fired plants which negatively affected the results of the first three quarters of 2011. The majority of the change in quarterly net income during 2011 occurred during the third quarter. This change is primarily due to an increase in expenses related to the repair of significant damage and purchase of replacement power necessitated by the series of storms on April 27, 2011, and April 28, 2011.

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- Definition The entire disclosure for the quarterly financial data in the annual financial statements. The disclosure may include a tabular presentation of financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income or loss before extraordinary items and earnings per share data. It also includes an indication if the information in the note is unaudited, comments on the aggregate effect of year-end adjustments, and an explanation of matters or transactions that affect comparability or are pertinent to an understanding of the information furnished. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section G -Subsection 1 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6372559&loc=d3e725-108305 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 28 -Paragraph 23, 24 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6372559&loc=d3e765-108305 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 28 -Paragraph 30 -Subparagraph a-j -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 302 -Paragraph a Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=6952194&loc=d3e1280-108306 + Details
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