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Subsequent Events Subsequent Events (Notes) | 12 Months Ended
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Sep. 30, 2019
Subsequent Events [Abstract] |
Subsequent Events [Text Block] | 25. Subsequent Events Redemption of Debt On October 15, 2019, TVA provided notice of its intent to redeem on November 15, 2019, the following electronotes identified by their respective CUSIP numbers and maturity dates. The notes will be redeemed at 100 percent of par value.
Year Issued |  | CUSIP |  | Coupon Rate |  | Maturity Date |  | Principal Outstanding
2012 |  | 88059TFH9 |  | 3.250% |  | 2/15/2032 |  | $ | 34 |
2012 |  | 88059TFJ5 |  | 3.625% |  | 3/15/2042 |  | 27 |
2012 |  | 88059TFK2 |  | 3.375% |  | 4/15/2032 |  | 24 |
2012 |  | 88059TFL0 |  | 3.550% |  | 5/15/2042 |  | 35 |
2013 |  | 88059TFM8 |  | 3.625% |  | 2/15/2043 |  | 48 |
2013 |  | 88059TFN6 |  | 2.375% |  | 2/15/2025 |  | 9 |
2013 |  | 88059TFP1 |  | 2.375% |  | 2/15/2025 |  | 12 |
2013 |  | 88059TFQ9 |  | 3.000% |  | 3/15/2029 |  | 16 |
2013 |  | 88059TFR7 |  | 3.150% |  | 4/15/2033 |  | 12 |
|  |  |  |  |  |  |  | $ | 217 |
TDEC Regulations In October 2019, TDEC released amendments to its regulations which govern solid waste disposal facilities, including TVA’s active CCR facilities covered by a solid waste disposal permit and those which closed pursuant to a TDEC approved closure plan. Such facilities are generally subject to a 30-year post-closure care period during which the owner or operator must undertake certain activities, including monitoring and maintaining the facility. The amendments will, among other things, substantially increase the post-closure care period, require resubmittal of closure plans every 10 years, and require TVA to submit recommendations as to what activities must be performed during the extended closure period to protect human health and the environment. TVA is currently evaluating the amendments to determine their potential impact on TVA and anticipates that the costs of complying with the amendments could be material.

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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 855 -URI http://asc.fasb.org/topic&trid=2122774 + Details
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