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Subsequent Events	9 Months Ended
	Jun. 30, 2012
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Bond Redemption On July 15, 2012, TVA redeemed all of its 2009 4.88 percent electronotes® due July 15, 2024, CUSIP number 88059TES6. The notes were redeemed at 100 percent of par value for a total of $28 million.

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The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

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