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Subsequent Events	6 Months Ended
	Mar. 31, 2012
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Bond Redemptions On April 15, 2012,  TVA redeemed all of its 2010 4.10 percent electronotes® due April 15, 2020, CUSIP number 88059TFA4. The notes were redeemed at 100 percent of par value for a total of $39 million. On April 15, 2012, TVA redeemed $1.0 billion of the 1992 Series D Bonds. See Note 11 — Power Bonds for additional details of this transaction. Swaption Exercise On April 15, 2012, the counterparty to TVA’s swaption exercised its option to enter into a swap with TVA. See Note 13 — Derivatives Not Receiving Hedge Accounting Treatment for additional details of this transaction.

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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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