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Leaseback Obligations	6 Months Ended
	Mar. 31, 2013
Leaseback Obligations [Abstract]
Leaseback Obligations	Leaseback Obligations Prior to 2004, TVA received approximately $945 million in proceeds by entering into leaseback transactions for 24 new peaking combustion turbine units ("CTs"). TVA also received approximately $389 million in proceeds by entering into a leaseback transaction for qualified technological equipment and software ("QTE") in 2003. Due to TVA's continuing involvement in the operation and maintenance of the leased units and equipment and its control over the distribution of power produced by the combustion turbine facilities during the leaseback term, TVA accounted for the lease proceeds as financing obligations. At March 31, 2013, and September 30, 2012, the outstanding leaseback obligations, related to CTs and QTE, were $780 million and $825 million, respectively. Seven States Power Corporation ("Seven States"), through its subsidiary, Seven States Southaven, LLC ("SSSL"), exercised its option to purchase from TVA an undivided 90 percent interest in a combined-cycle combustion turbine facility in Southaven, Mississippi.  As part of interim joint-ownership arrangements, Seven States has the right at any time during the interim period, and for any reason, to require TVA to buy back SSSL's interest in the facility.  The interim period under the joint-ownership arrangements was to expire on April 23, 2013.  On April 18, 2013, TVA and Seven States, through SSSL, agreed to extend the expiration date of the interim joint ownership arrangements to September 5, 2013.  The other material terms and conditions of the arrangements were not changed and remain in full force and effect.  TVA intends to re-acquire SSSL's interest in the facility and the related assets either on or prior to the extended expiration date of September 5, 2013.  The carrying amount of the Southaven obligation on TVA's consolidated balance sheets was approximately $370 million at March 31, 2013, and $378 million at September 30, 2012.  On March 31, 2013, this obligation was recorded in Current portion of leaseback obligations on the Consolidated Balance Sheets.

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- Definition

The entire disclosure for collaborative arrangements in which the entity is a participant, including a) information about the nature and purpose of such arrangements; b) its rights and obligations thereunder; c) the accounting policy for collaborative arrangements; and d) the income statement classification and amounts attributable to transactions arising from the collaborative arrangement between participants.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 808

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6931272&loc=SL5834143-161434



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Emerging Issues Task Force (EITF)

-Number 07-1

-Paragraph 21

-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.

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