XML 38 R61.htm IDEA: XBRL DOCUMENT v3.2.0.727
Risk Management Activities and Derivative Transactions Derivative Instruments That Do Not Receive Hedge Accounting Treatment (Details)
 3 Months Ended 9 Months Ended
Jun. 30, 2015
USD ($)
Jun. 30, 2014
USD ($)
Jun. 30, 2015
USD ($)
Jun. 30, 2014
USD ($)
Sep. 30, 2014
USD ($)
Derivative          
Change in Unrealized gains (losses) on Interest Rate Derivatives $ 278,000,000 $ (65,000,000) $ (71,000,000) $ (90,000,000)  
Amount of gain (loss) recognized in income on derivatives 0   0    
Unrealized gain (loss) on derivatives 0 0 0 0  
Interest Rate Swap          
Derivative          
Amount of gain (loss) recognized in income on derivatives [1] 0 0 0 0  
Commodity Contract Derivatives          
Derivative          
Amount of gain (loss) recognized in income on derivatives 0 0 [1] 0 0 [1]  
Fair value (125,000,000)   (125,000,000)   $ (96,000,000)
Commodity derivatives under the financial trading program          
Derivative          
Amount of gain (loss) recognized in income on derivatives (30,000,000) $ (6,000,000) [1] (69,000,000) $ (29,000,000) [1]  
Fair value [2] $ (125,000,000)   $ (125,000,000)   $ (103,000,000)
Coal Contract Derivatives          
Derivative          
Number of contracts 13   13   24
Notional amount 22,000,000   22,000,000   31,000,000
Fair value $ (128,000,000)   $ (128,000,000)   $ (86,000,000)
Natural Gas          
Derivative          
Number of contracts 36   36   46
Notional amount 146,000,000   146,000,000   62,000,000
Fair value $ 3,000,000   $ 3,000,000   $ (10,000,000)
Maximum | Coal Contract Derivatives          
Derivative          
Derivative, Term of Contract     3 years    
Maximum | Natural Gas          
Derivative          
Derivative, Term of Contract     3 years    
Natural Gas          
Derivative          
Fair value (125,000,000)   $ (125,000,000)   (103,000,000)
Letter of Credit          
Derivative          
Amount of letters of credit outstanding $ 1,100,000,000   $ 1,100,000,000   $ 1,000,000,000
[1] All of TVA's derivative instruments that do not receive hedge accounting treatment have unrealized gains (losses) that would otherwise be recognized in incomebut 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 nine months ended June 30, 2015 and 2014.
[2] Fair values of certain derivatives under the FTP that were in net liability positions totaling $91 million and $69 million at June 30, 2015 and September 30, 2014, respectively, are recorded in TVA's margin cash accounts in Other current assets. These derivatives are transacted with futures commission merchants, and cash deposits have been posted to the margin cash accounts held with each futures commission merchant to offset the net liability positions in full.