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Risk Management Activities and Derivative Transactions | 6 Months Ended
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Mar. 31, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Risk Management Activities and Derivative Transactions | Risk Management Activities and Derivative Transactions TVA is exposed to various risks. These include risks related to commodity prices, investment prices, interest rates, currency exchange rates, inflation, and counterparty credit and performance risks. To help manage certain of these risks, TVA has entered into various derivative transactions, principally commodity option contracts, forward contracts, swaps, swaptions, futures, and options on futures. Other than certain derivative instruments in investment funds, it is TVA's policy to enter into these derivative transactions solely for hedging purposes and not for speculative purposes. Overview of Accounting Treatment TVA recognizes certain of its derivative instruments as either assets or liabilities on its consolidated balance sheets at fair value. The accounting for changes in the fair value of these instruments depends on (1) whether TVA uses regulatory accounting to defer the derivative gains and losses, (2) whether the derivative instrument has been designated and qualifies for hedge accounting treatment, and (3) if so, the type of hedge relationship (for example, cash flow hedge). The following tables summarize the accounting treatment that certain of TVA's financial derivative transactions receive.
Summary of Derivative Instruments That Receive Hedge Accounting Treatment (part 1)
|  |  |  |  |  | Amount of Mark-to-Market(1) Gain (Loss) Recognized in Other Comprehensive Income (Loss)(2) Three Months Ended March 31 |  | Amount of Mark-to-Market Gain (Loss) Recognized in Other Comprehensive Income (Loss) Six Months Ended March 31
Derivatives in Cash Flow Hedging Relationship |  | Objective of Hedge Transaction |  | Accounting for Derivative Hedging Instrument |  | 2013 |  | 2012 |  | 2013 |  | 2012
Currency swaps |  | To protect against changes in cash flows caused by changes in foreign currency exchange rates (exchange rate risk) |  | Cumulative unrealized gains and losses are recorded in OCI and reclassified to interest expense to the extent they are offset by cumulative gains and losses on the hedged transaction |  | $ | (49 | ) |  | $ | 21 |  |  | $ | (16 | ) |  | $ | 64 |
Notes (1) Mark-to-Market ("MtM") (2) Other Comprehensive Income (Loss) ("OCI")
Summary of Derivative Instruments That Receive Hedge Accounting Treatment (part 2)
|  | Amount of Gain (Loss) Reclassified from OCI to Interest Expense Three Months Ended March 31 |  | Amount of Gain (Loss) Reclassified from OCI to Interest Expense Six Months Ended March 31
Derivatives in Cash Flow Hedging Relationship |  | 2013 |  | 2012 |  | 2013 |  | 2012
Currency swaps |  | $ | 63 |  |  | $ | (28 | ) |  | $ | 58 |  |  | $ | (26 | )
Note There were no ineffective portions or amounts excluded from effectiveness testing for any of the periods presented.
Summary of Derivative Instruments That Do Not Receive Hedge Accounting Treatment
|  |  |  |  |  | Amount of Gain (Loss) Recognized in Income on Derivatives Three Months Ended March 31(1) |  | Amount of Gain (Loss) Recognized in Income on Derivatives Six Months Ended March 31(1)
Derivative Type |  | Objective of Derivative |  | Accounting for Derivative Instrument |  | 2013 |  | 2012 |  | 2013 |  | 2012
Interest rate swaps |  | To fix short-term debt variable rate to a fixed rate (interest rate risk) |  | MtM gains and losses are recorded as regulatory assets or liabilities until settlement, at which time the gains/losses are recognized in gain/loss on derivative contracts. |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Commodity contract derivatives |  | To protect against fluctuations in market prices of purchased coal or natural gas (price risk) |  | MtM gains and losses are recorded as regulatory assets or liabilities. Realized gains and losses due to contract settlements are recognized in fuel expense as incurred. |  | — |  |  | (3 | ) |  | — |  |  | (16 | )
Commodity derivatives under financial trading program ("FTP") |  | To protect against fluctuations in market prices of purchased commodities (price risk) |  | MtM gains and losses are recorded as regulatory assets or liabilities. Realized gains and losses are recognized in fuel expense or purchased power expense when the related commodity is used in production. |  | (32 | ) |  | (88 | ) |  | (77 | ) |  | (144 | )
Note (1) All of TVA's derivative instruments that do not receive hedge accounting treatment have unrealized gains (losses) that would otherwise be recognized in income but instead are deferred as regulatory assets and liabilities. As such, there was no related gain (loss) recognized in income for these unrealized gains (losses) for the three and six months ended March 31, 2013, and 2012.
Mark-to-Market Values of TVA Derivatives
| At March 31, 2013 |  | At September 30, 2012
Derivatives that Receive Hedge Accounting Treatment:
| Balance |  | Balance Sheet Presentation |  | Balance |  | Balance Sheet Presentation
Currency swaps |  |  |  |  |  |  |
£200 million Sterling | $ | (37 | ) |  | Other long-term liabilities |  | $ | (23 | ) |  | Other long-term liabilities
£250 million Sterling | 14 |  |  | Other long-term assets |  | 21 |  |  | Other long-term assets
£150 million Sterling | (26 | ) |  | Other long-term liabilities |  | (31 | ) |  | Other long-term liabilities
Derivatives that Do Not Receive Hedge Accounting Treatment:
| Balance |  | Balance Sheet Presentation |  | Balance |  | Balance Sheet Presentation
Interest rate swaps |  |  |  |  |  |  |
$1.0 billion notional | (1,101 | ) |  | Other long-term liabilities |  | (1,247 | ) |  | Other long-term liabilities
$476 million notional | (393 | ) |  | Other long-term liabilities |  | (458 | ) |  | Other long-term liabilities
$42 million notional | (16 | ) |  | Other long-term liabilities |  | (18 | ) |  | Other long-term liabilities
Commodity contract derivatives | (148 | ) |  | Other long-term assets $2; Other current assets $5; Other long-term liabilities $(52); Accounts payable and accrued liabilities $(103) |  | (267 | ) |  | Other long-term assets $107; Other current assets $12; Other long-term liabilities $(205); Accounts payable and accrued liabilities $(181)
FTP |  |  |  |  |  |  |
Margin cash account(1) | 19 |  |  | Other current assets |  | 43 |  |  | Other current assets
Derivatives under FTP | (161 | ) |  | Other long-term assets $1; Other current assets $(82); Other long-term liabilities $(41); Accounts payable and accrued liabilities $(39) |  | (229 | ) |  | Other long-term assets $2; Other current assets $(104); Other long-term liabilities $(60); Accounts payable and accrued liabilities $(67)
Note (1) In accordance with certain credit terms, TVA uses leverage to trade financial instruments under the FTP. Therefore, the margin cash account balance does not represent 100 percent of the net market value of the derivative positions outstanding as shown in the Derivatives Under Financial Trading Program table. Cash Flow Hedging Strategy for Currency Swaps To protect against exchange rate risk related to three British pound sterling denominated Bond transactions, TVA entered into foreign currency hedges at the time the Bond transactions occurred. TVA had the following currency swaps outstanding as of March 31, 2013:
Currency Swaps Outstanding At March 31, 2013
Effective Date of Currency Swap Contract |  | Associated TVA Bond Issues Currency Exposure |  | Expiration Date of Swap |  | Overall Effective Cost to TVA
1999 |  | £200 million |  | 2021 |  | 5.81%
2001 |  | £250 million |  | 2032 |  | 6.59%
2003 |  | £150 million |  | 2043 |  | 4.96%
When the dollar strengthens against the British pound sterling, the transaction gain on the Bond liability is offset by a currency exchange loss on the swap contract. Conversely, when the dollar weakens against the British pound sterling, the transaction loss on the Bond liability is offset by an exchange gain on the swap contract. All such exchange gains or losses on the Bond liability are included in Long-term debt, net. The offsetting exchange losses or gains on the swap contracts are recognized in Accumulated other comprehensive income (loss). If any gain (loss) were to be incurred as a result of the early termination of the foreign currency swap contract, the resulting income (expense) would be amortized over the remaining life of the associated Bond as a component of Interest expense. Derivatives Not Receiving Hedge Accounting Treatment Interest Rate Derivatives. In March 2012, the counterparty to TVA's only outstanding swaption agreement exercised its option to enter into an interest rate swap with TVA, effective April 15, 2012, requiring TVA to make fixed-rate payments to the counterparty of 8.25 percent and the counterparty to make floating rate payments to TVA based on LIBOR until April 15, 2042. These payments are based on a notional principal amount of $1.0 billion and began on July 15, 2012. TVA uses regulatory accounting treatment to defer the MtM gains and losses on the interest rate swaps. The net deferred unrealized gains and losses are classified as regulatory assets or liabilities on TVA's consolidated balance sheets and are included in the ratemaking formula when the transactions settle. The values of these derivatives are included in Other long-term assets or Other long-term liabilities on the consolidated balance sheets, and realized gains and losses, if any, are included in TVA's consolidated statements of operations. For the three and six months ended March 31, 2013, the changes in market value of the interest rate swaps resulted in deferred unrealized gains of $99 million and $213 million, respectively. Commodity Derivatives. TVA enters into certain derivative contracts for coal and natural gas that require physical delivery of the contracted quantity of the commodity. TVA marks to market all such contracts. At March 31, 2013, and September 30, 2012, TVA's coal contract derivatives had net market values of $(148) million and $(267) million, respectively, which TVA deferred as regulatory assets or liabilities on a gross basis. At March 31, 2013, TVA's coal contract derivatives had terms of up to five years. At March 31, 2013, and September 30, 2012, TVA's natural gas derivative contracts had total market values of less than $1 million. At March 31, 2013, these natural gas derivative contracts had terms of up to two years.
Commodity Contract Derivatives
| At March 31, 2013 |  | At September 30, 2012
| Number of Contracts |  | Notional Amount |  | Fair Value (MtM) |  | Number of Contracts |  | Notional Amount |  | Fair Value (MtM)
Coal contract derivatives | 21 |  | 43 million tons |  | $ | (148 | ) |  | 23 |  | 46 million tons |  | $ | (267 | )
Natural gas contract derivatives | 14 |  | 45 million mmBtu |  | $ | — |  |  | 25 |  | 51 million mmBtu |  | $ | — |
Derivatives Under FTP. TVA has an FTP under which it purchases and sells futures, swaps, options, and combinations of these instruments (as long as they are standard in the industry) to hedge TVA’s exposure to (1) the price of natural gas, fuel oil, electricity, coal, emission allowances, nuclear fuel, and other commodities included in TVA’s fuel cost adjustment calculation, (2) the price of construction materials, and (3) contracts for goods priced in or indexed to foreign currencies. The combined transaction limit for the fuel cost adjustment and construction material transactions is $130 million (based on one-day value at risk). In addition, the maximum hedge volume for the construction material transactions is 75 percent of the underlying net notional volume of the material that TVA anticipates using in approved TVA projects, and the market value of all outstanding hedging transactions involving construction materials is limited to $100 million at the execution of any new transaction. The portfolio value at risk limit for the foreign currency transactions is $5 million and is separate and distinct from the $130 million transaction limit discussed above. TVA's policy prohibits trading financial instruments under the FTP for speculative purposes. At March 31, 2013, the risks hedged under the FTP were the economic risks associated with the prices of natural gas, fuel oil and crude oil. All futures contracts and option contracts under the FTP have expired. Swap contracts under the FTP had remaining terms of five years or less.
Derivatives Under Financial Trading Program
| At March 31, 2013 |  | At September 30, 2012
| Notional Amount |  | Fair Value (MtM) (in millions) |  | Notional Amount |  | Fair Value (MtM) (in millions)
Natural gas (in mmBtu) |  |  |  |  |  |  |
Futures contracts | — |  |  | $ | — |  |  | — |  |  | $ | — |
Swap contracts | 195,127,500 |  |  | (164 | ) |  | 294,462,500 |  |  | (232 | )
Option contracts | — |  |  | — |  |  | — |  |  | — |
Natural gas financial positions | 195,127,500 |  |  | $ | (164 | ) |  | 294,462,500 |  |  | $ | (232 | )
Fuel oil/crude oil (in barrels) |  |  |  |  |  |  |  |  |
Futures contracts | — |  |  | $ | — |  |  | — |  |  | $ | — |
Swap contracts | 1,184,000 |  |  | 3 |  |  | 1,390,000 |  |  | 4 |
Option contracts | — |  |  | — |  |  | — |  |  | — |
Fuel oil/crude oil financial positions | 1,184,000 |  |  | $ | 3 |  |  | 1,390,000 |  |  | $ | 4 |
Coal (in tons) |  |  |  |  |  |  |  |  |  |  |
Futures contracts | — |  |  | $ | — |  |  | — |  |  | $ | — |
Swap contracts | — |  |  | — |  |  | — |  |  | — |
Option contracts | — |  |  | — |  |  | — |  |  | — |
Coal financial positions | — |  |  | $ | — |  |  | — |  |  | $ | — |
Note Due to the right of setoff and method of settlement, TVA elects to record commodity derivatives under the FTP based on its net commodity position with the broker or other counterparty. Notional amounts disclosed represent the net absolute value of contractual amounts. TVA defers all FTP unrealized gains (losses) as regulatory liabilities (assets) and records only realized gains or losses to match the delivery period of the underlying commodity. In addition to the open commodity derivatives disclosed above, TVA had closed derivative contracts with market values of $(6) million at March 31, 2013, and $(21) million at September 30, 2012. TVA experienced the following unrealized and realized gains and losses related to the FTP at the dates and during the periods, as applicable, set forth in the tables below:
FTP Unrealized Gains (Losses)
FTP unrealized gains (losses) deferred as regulatory liabilities (assets) |  | At March 31, 2013 |  | At September 30, 2012
Natural gas |  | $ | (164 | ) |  | $ | (232 | )
Fuel oil/crude oil |  | 3 |  |  | 4 |
FTP Realized Gains (Losses)
|  | For the Three Months Ended March 31 |  | For the Six Months Ended March 31
(Increase) decrease in fuel expense |  | 2013 |  | 2012 |  | 2013 |  | 2012
Natural gas |  | $ | (20 | ) |  | $ | (16 | ) |  | $ | (48 | ) |  | $ | (16 | )
Fuel oil/crude oil |  | — |  |  | 2 |  |  | 2 |  |  | 7 |
Coal |  | — |  |  | — |  |  | (1 | ) |  | 1 |
FTP Realized Gains (Losses)
|  | For the Three Months Ended March 31 |  | For the Six Months Ended March 31
(Increase) decrease in purchased power expense |  | 2013 |  | 2012 |  | 2013 |  | 2012
Natural gas |  | $ | (13 | ) |  | $ | (74 | ) |  | $ | (32 | ) |  | $ | (136 | )
Other Derivative Instruments Investment Fund Derivatives. Investment funds consist primarily of funds held in the Nuclear Decommissioning Trust ("NDT"), Asset Retirement Trust ("ART"), and Supplemental Executive Retirement Plan ("SERP"). All securities in the trusts are classified as trading. See Note 14 — Investments for a discussion of the trusts' objectives and the types of investments included in the various trusts. These trusts may invest in derivative instruments which may include swaps, futures, options, forwards, and other instruments. At March 31, 2013, and September 30, 2012, the fair value of derivative instruments in these trusts was not material to TVA's consolidated financial statements. Collateral. TVA's interest rate swaps and currency swaps contain contract provisions that require a party to post collateral (in a form such as cash or a letter of credit) when the party's liability balance under the agreement exceeds a certain threshold. At March 31, 2013, the aggregate fair value of all derivative instruments with credit-risk related contingent features that were in a liability position was $1.6 billion. TVA's collateral obligations at March 31, 2013, under these arrangements was $1.1 billion, for which TVA had posted $1.1 billion in letters of credit. These letters of credit reduce the available balance under the related credit facilities. TVA's assessment of the risk of its nonperformance includes a reduction in its exposure under the contract as a result of this posted collateral. For all of its derivative instruments with credit-risk related contingent features:
• | If TVA remains a majority-owned U.S. government entity but Standard & Poor's ("S&P") or Moody's Investors Service ("Moody's") downgrades TVA's credit rating to AA or Aa2, respectively, TVA's collateral obligations would likely increase by $22 million; and
• | If TVA ceases to be majority-owned by the U.S. government, TVA's credit rating would likely be downgraded and TVA would be required to post additional collateral.
Counterparty Credit Risk Credit risk is the exposure to economic loss that would occur as a result of a counterparty's nonperformance of its contractual obligations. Where exposed to counterparty credit risk, TVA analyzes the counterparty's financial condition prior to entering into an agreement, establishes credit limits, monitors the appropriateness of those limits, as well as any changes in the creditworthiness of the counterparty on an ongoing basis, and employs credit mitigation measures, such as collateral or prepayment arrangements and master purchase and sale agreements, to mitigate credit risk. Credit of Customers. The majority of TVA's counterparty credit risk is associated with trade accounts receivable from delivered power sales to municipal and cooperative distributor customers, all located in the Tennessee Valley region. To a lesser extent, TVA is exposed to credit risk from industries and federal agencies directly served and from exchange power arrangements with a small number of investor-owned regional utilities related to either delivered power or the replacement of open positions of longer-term purchased power or fuel agreements. TVA had concentrations of accounts receivable from two municipal and cooperative customers that represented 18 percent of total outstanding accounts receivable at March 31, 2013. TVA had concentrations of accounts receivable from three municipal and cooperative customers that represented 26 percent of total outstanding accounts receivable at September 30, 2012. Power sales to TVA's largest directly served industrial customer represented five percent of TVA's total operating revenues for the six months ended March 31, 2013. This customer's senior unsecured credit ratings are currently rated below investment grade by both S&P and Moody's. As a result of its credit ratings, this customer has provided credit assurance to TVA under the terms of its power contract. Credit of Derivative Counterparties. TVA has entered into derivative contracts for hedging purposes, and TVA's NDT fund and defined benefit pension plan have entered into derivative contracts for investment purposes. If a counterparty to one of TVA's hedging transactions defaults, TVA might incur substantial costs in connection with entering into a replacement hedging transaction. If a counterparty to the derivative contracts into which the NDT fund and the pension plan have entered for investment purposes defaults, the value of the investment could decline significantly or perhaps become worthless. TVA has concentrations of credit risk from the banking and coal industries because multiple companies in these industries serve as counterparties to TVA in various derivative transactions. At March 31, 2013, all of TVA's currency swaps, interest rate swaps, and commodity derivatives under the FTP were with counterparties whose Moody's credit rating was Baa1 or higher. At March 31, 2013, all of TVA's coal contract derivatives were with counterparties whose Moody's credit rating, or TVA's internal analysis when such information was unavailable, was B3 or higher. See Derivatives Not Receiving Hedge Accounting Treatment. TVA currently utilizes two active futures commission merchants ("FCMs") to clear commodity contracts, including futures, options and similar financial derivatives. These transactions are executed under the FTP by the FCMs on exchanges on behalf of TVA. TVA maintains margin cash accounts with the FCMs. See notes to the Mark-to-Market Values of TVA Derivatives table. Credit of Suppliers. If one of TVA's fuel or purchased power suppliers fails to perform under the terms of its contract with TVA, TVA might lose the money that it paid to the supplier under the contract and have to purchase replacement fuel or power on the spot market, perhaps at a significantly higher price than TVA was entitled to pay under the contract. In addition, TVA might not be able to acquire replacement fuel or power in a timely manner and thus might be unable to satisfy its own obligations to deliver power. To help ensure a reliable supply of coal, TVA had coal contracts with 11 different suppliers at March 31, 2013. The contracted supply of coal is sourced from multiple geographic regions of the United States and is to be delivered via various transportation methods (for example, barge, rail, and truck). TVA purchases all of its natural gas requirements from a variety of suppliers under short-term contracts. TVA has a power purchase agreement that expires on March 31, 2032, with a supplier of electricity for 440 megawatts ("MW") of summer net capability from a lignite-fired generating plant. TVA has determined that the supplier has the equivalent of a non-investment grade credit rating; therefore, the supplier has provided credit assurance to TVA under the terms of the agreement. The senior unsecured credit ratings of TVA's largest supplier of uranium enrichment services, which is also TVA's largest industrial customer directly served, are currently rated below investment grade by both S&P and Moody's. Any nonperformance by this company could result in TVA incurring additional costs.

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- Definition The entire disclosure for the entity's entire derivative instruments and hedging activities. Describes an entity's risk management strategies, derivatives in hedging activities and non-hedging derivative instruments, the assets, obligations, liabilities, revenues and expenses arising therefrom, and the amounts of and methodologies and assumptions used in determining the amounts of such items. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7668309&loc=d3e80784-113994 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4E -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624181-113959 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4K -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5708775-113959 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5579245-113959 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(n)) -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=7476318&loc=d3e41641-113959 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5579240-113959 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6441202&loc=d3e80720-113993 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=7476318&loc=d3e41638-113959 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7476318&loc=d3e41635-113959 Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. 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