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Commodity And Other Derivative Contractual Assets And Liabilities (Tables)
 9 Months Ended
Sep. 30, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Offsetting Assets and Liabilities [Table Text Block]
The following tables reconcile our derivative assets and liabilities as presented in the consolidated balance sheet to net amounts after taking into consideration netting arrangements with counterparties and financial collateral:
September 30, 2013
 
 
Amounts Presented in Balance Sheet
 
Offsetting Financial Instruments (a)
 
Financial Collateral (Received) Pledged (b)
 
Net Amounts (c)
Derivative assets:
 
 
 
 
 
 
 
 
Commodity contracts
 
$
1,131

 
$
(613
)
 
$
(351
)
 
$
167

Interest rate swaps
 
1

 
(1
)
 
—

 
—

Total derivative assets
 
1,132

 
(614
)
 
(351
)
 
167

Derivative liabilities:
 
 
 
 
 
 
 
 
Commodity contracts
 
(209
)
 
180

 
11

 
(18
)
Interest rate swaps
 
(1,167
)
 
434

 
—

 
(733
)
Total derivative liabilities
 
(1,376
)
 
614

 
11

 
(751
)
Net amounts
 
$
(244
)
 
$
—

 
$
(340
)
 
$
(584
)

December 31, 2012
 
 
Amounts Presented in Balance Sheet
 
Offsetting Financial Instruments (a)
 
Financial Collateral (Received) Pledged (b)
 
Net Amounts
Derivative assets:
 
 
 
 
 
 
 
 
Commodity contracts
 
$
2,047

 
$
(1,263
)
 
$
(597
)
 
$
187

Interest rate swaps
 
2

 
(2
)
 
—

 
—

Total derivative assets
 
2,049

 
(1,265
)
 
(597
)
 
187

Derivative liabilities:
 
 
 
 
 
 
 
 
Commodity contracts
 
(383
)
 
319

 
29

 
(35
)
Interest rate swaps
 
(2,067
)
 
946

 
—

 
(1,121
)
Total derivative liabilities
 
(2,450
)
 
1,265

 
29

 
(1,156
)
Net amounts
 
$
(401
)
 
$
—

 
$
(568
)
 
$
(969
)
____________
(a)
Offsetting financial instruments with respect to commodity contracts include amounts related to interest rate swaps and vice versa. Amounts exclude trade accounts receivable and payable related to settled financial instruments.
(b)
Financial collateral consists entirely of cash margin deposits.
(c)
Includes net liability positions totaling approximately $1.2 billion (before nonperformance risk adjustment) related to counterparties with positions that are secured by a first-lien interest in the same assets of TCEH (on a pari passu basis) with the TCEH Senior Secured Facilities and the TCEH Senior Secured Notes.
Schedule of Commodity and Other Derivative Contractual Assets and Liabilities as Reported in the Balance Sheets
The following tables provide detail of commodity and other derivative contractual assets and liabilities (with the column totals representing the net positions of the contracts) as reported in the balance sheets at September 30, 2013 and December 31, 2012:
September 30, 2013
 
Derivative assets
 
Derivative liabilities
 
 
 
Commodity contracts
 
Interest rate swaps
 
Commodity contracts
 
Interest rate swaps
 
Total
Current assets
$
972

 
$
1

 
$
—

 
$
—

 
$
973

Noncurrent assets
159

 
—

 
—

 
—

 
159

Current liabilities
(2
)
 
—

 
(204
)
 
(388
)
 
(594
)
Noncurrent liabilities
—

 
—

 
(3
)
 
(779
)
 
(782
)
Net assets (liabilities)
$
1,129

 
$
1

 
$
(207
)
 
$
(1,167
)
 
$
(244
)

December 31, 2012
 
Derivative assets
 
Derivative liabilities
 
 
 
Commodity contracts
 
Interest rate swaps
 
Commodity contracts
 
Interest rate swaps
 
Total
Current assets
$
1,461

 
$
2

 
$
—

 
$
—

 
$
1,463

Noncurrent assets
586

 
—

 
—

 
—

 
586

Current liabilities
—

 
—

 
(366
)
 
(528
)
 
(894
)
Noncurrent liabilities
—

 
—

 
(17
)
 
(1,539
)
 
(1,556
)
Net assets (liabilities)
$
2,047

 
$
2

 
$
(383
)
 
$
(2,067
)
 
$
(401
)
Schedule of Pre-tax Effect on Net Income of Derivatives Not Under Hedge Accounting, Including Realized and Unrealized Effects
The following table presents the pretax effect of derivatives on net income (gains (losses)), including realized and unrealized effects:
 
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
Derivative (income statement presentation)
 
2013
 
2012
 
2013
 
2012
Commodity contracts (Net gain (loss) from commodity hedging and trading activities) (a)
 
$
98

 
$
(95
)
 
$
54

 
$
130

Interest rate swaps (Interest expense and related charges) (b)
 
253

 
(188
)
 
433

 
(521
)
Net gain (loss)
 
$
351

 
$
(283
)
 
$
487

 
$
(391
)
_______________
(a)
Amount represents changes in fair value of positions in the derivative portfolio during the period, as realized amounts related to positions settled are assumed to equal reversals of previously recorded unrealized amounts.
(b)
Includes unrealized mark-to-market net gain (loss) as well as the net realized effect on interest paid/accrued, both reported in "Interest Expense and Related Charges" (see Note 12).
Schedule of Pre-tax Effect on Net Income and Other Comprehensive Income (OCI) of Derivative Instruments Previously Accounted for as Cash Flow Hedges
The following table presents the pretax effect (all losses) on net income and other comprehensive income (OCI) of derivative instruments previously accounted for as cash flow hedges. There were no amounts recognized in OCI for the three and nine months ended September 30, 2013 and 2012.
 
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
Derivative (income statement presentation)
 
2013
 
2012
 
2013
 
2012
Interest rate swaps (Interest expense and related charges)
 
$
(1
)
 
$
(1
)
 
$
(6
)
 
$
(6
)
Interest rate swaps (Depreciation and amortization)
 
(1
)
 
(1
)
 
(2
)
 
(2
)
Total
 
$
(2
)
 
$
(2
)
 
$
(8
)
 
$
(8
)
Schedule of Gross Notional Amounts of Derivative Volumes
The following table presents the gross notional amounts of derivative volumes at September 30, 2013 and December 31, 2012:
 
 
 
 
 
 
 
 
 
September 30, 2013
 
December 31, 2012
 
 
Derivative type
 
Notional Volume
 
Unit of Measure
Interest rate swaps:
 
 
 
 
 
 
Floating/fixed (a)
 
$
30,740

 
$
31,060

 
Million US dollars
Basis
 
$
11,967

 
$
11,967

 
Million US dollars
Natural gas:
 

 

 

Natural gas forward sales and purchases (b)
 
452

 
875

 
Million MMBtu
Locational basis swaps
 
337

 
495

 
Million MMBtu
All other
 
2,021

 
1,549

 
Million MMBtu
Electricity
 
21,663

 
76,767

 
GWh
Congestion Revenue Rights (c)
 
82,156

 
111,185

 
GWh
Coal
 
11

 
14

 
Million US tons
Fuel oil
 
28

 
47

 
Million gallons
Uranium
 
575

 
441

 
Thousand pounds
_______________
(a)
Includes notional amount of interest rate swaps with maturity dates through October 2014 as well as notional amount of swaps effective from October 2014 with maturity dates through October 2017 (see Note 5).
(b)
Represents gross notional forward sales, purchases and options transactions in the natural gas hedging program. The net amount of these transactions was approximately 210 million MMBtu and 360 million MMBtu at September 30, 2013 and December 31, 2012, respectively.
(c)
Represents gross forward purchases associated with instruments used to hedge electricity price differences between settlement points within ERCOT.