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Impact of New Accounting Standards and Interpretations
 3 Months Ended
Dec. 31, 2012
Accounting Changes and Error Corrections [Abstract]  
Impact of New Accounting Standards and Interpretations
Impact of New Accounting Standards and Interpretations

Comprehensive Income.  In June 2011, the Financial Accounting Standards Board ("FASB") issued guidance that requires adjustments to the presentation of TVA's financial information.  The guidance eliminated the option to report comprehensive income and its components in the statement of changes in proprietary capital. The guidance required the presentation of net income and other comprehensive income in either one continuous statement or in two separate but consecutive statements. TVA chose the two statement approach. These changes became effective for TVA on October 1, 2012. The adoption of this guidance did not have an impact on TVA's financial condition, results of operations, or cash flows.

The following accounting standard has been issued, but as of December 31, 2012, was not effective and had not been adopted by TVA.

Balance Sheet. In December 2011, FASB issued guidance that requires additional disclosures relating to the rights of offset or other netting arrangements of assets and liabilities that are presented on a net or gross basis in the consolidated balance sheets. The guidance applies to derivative and other financial instruments and requires the disclosure of the gross amounts subject to offset, actual amounts offset in accordance with GAAP, and the related net exposure. These changes will become effective for TVA on October 1, 2013, and will be applied on a retrospective basis. Since this guidance relates solely to enhanced disclosures in the notes to the consolidated financial statements, it will not have an impact on TVA's financial condition, results of operations, or cash flows.