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Derivative Instruments (Tables) | 9 Months Ended
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Sep. 30, 2016
Derivative Instruments and Hedging Activities Disclosures [Line Items] |
Fair Value of Derivative Liabilities Instruments | The following table summarizes the gross and net fair values of SCE's commodity derivative instruments:
|  | September 30, 2016 |  |
|  | Derivative Assets |  | Derivative Liabilities |  | Net Liability
(in millions) |  | Short-Term |  | Long-Term |  | Subtotal |  | Short-Term |  | Long-Term |  | Subtotal |
Commodity derivative contracts |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross amounts recognized |  | $ | 62 |  |  | $ | 67 |  |  | $ | 129 |  |  | $ | 226 |  |  | $ | 1,069 |  |  | $ | 1,295 |  |  | $ | 1,166 |
Gross amounts offset in the consolidated balance sheets |  | (2 | ) |  | — |  |  | (2 | ) |  | (2 | ) |  | — |  |  | (2 | ) |  | — |
Cash collateral posted1 |  | — |  |  | — |  |  | — |  |  | (1 | ) |  | — |  |  | (1 | ) |  | (1 | )
Net amounts presented in the consolidated balance sheets |  | $ | 60 |  |  | $ | 67 |  |  | $ | 127 |  |  | $ | 223 |  |  | $ | 1,069 |  |  | $ | 1,292 |  |  | $ | 1,165 |
|  | December 31, 2015 |  |
|  | Derivative Assets |  | Derivative Liabilities |  | Net Liability
(in millions) |  | Short-Term |  | Long-Term |  | Subtotal |  | Short-Term |  | Long-Term |  | Subtotal |
Commodity derivative contracts |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross amounts recognized |  | $ | 81 |  |  | $ | 84 |  |  | $ | 165 |  |  | $ | 235 |  |  | $ | 1,100 |  |  | $ | 1,335 |  |  | $ | 1,170 |
Gross amounts offset in the consolidated balance sheets |  | (2 | ) |  | — |  |  | (2 | ) |  | (2 | ) |  | — |  |  | (2 | ) |  | — |
Cash collateral posted1 |  | — |  |  | — |  |  | — |  |  | (15 | ) |  | — |  |  | (15 | ) |  | (15 | )
Net amounts presented in the consolidated balance sheets |  | $ | 79 |  |  | $ | 84 |  |  | $ | 163 |  |  | $ | 218 |  |  | $ | 1,100 |  |  | $ | 1,318 |  |  | $ | 1,155 |
1 | In addition, at September 30, 2016 and December 31, 2015, SCE had posted $4 million and $31 million, respectively, of cash collateral that is not offset against derivative liabilities and is reflected in "Other current assets" on the consolidated balance sheets.
Southern California Edison |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |
Fair Value of Derivative Asset Instruments | The following table summarizes the gross and net fair values of SCE's commodity derivative instruments:
|  | September 30, 2016 |  |
|  | Derivative Assets |  | Derivative Liabilities |  | Net Liability
(in millions) |  | Short-Term |  | Long-Term |  | Subtotal |  | Short-Term |  | Long-Term |  | Subtotal |
Commodity derivative contracts |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross amounts recognized |  | $ | 62 |  |  | $ | 67 |  |  | $ | 129 |  |  | $ | 226 |  |  | $ | 1,069 |  |  | $ | 1,295 |  |  | $ | 1,166 |
Gross amounts offset in the consolidated balance sheets |  | (2 | ) |  | — |  |  | (2 | ) |  | (2 | ) |  | — |  |  | (2 | ) |  | — |
Cash collateral posted1 |  | — |  |  | — |  |  | — |  |  | (1 | ) |  | — |  |  | (1 | ) |  | (1 | )
Net amounts presented in the consolidated balance sheets |  | $ | 60 |  |  | $ | 67 |  |  | $ | 127 |  |  | $ | 223 |  |  | $ | 1,069 |  |  | $ | 1,292 |  |  | $ | 1,165 |
|  | December 31, 2015 |  |
|  | Derivative Assets |  | Derivative Liabilities |  | Net Liability
(in millions) |  | Short-Term |  | Long-Term |  | Subtotal |  | Short-Term |  | Long-Term |  | Subtotal |
Commodity derivative contracts |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross amounts recognized |  | $ | 81 |  |  | $ | 84 |  |  | $ | 165 |  |  | $ | 235 |  |  | $ | 1,100 |  |  | $ | 1,335 |  |  | $ | 1,170 |
Gross amounts offset in the consolidated balance sheets |  | (2 | ) |  | — |  |  | (2 | ) |  | (2 | ) |  | — |  |  | (2 | ) |  | — |
Cash collateral posted1 |  | — |  |  | — |  |  | — |  |  | (15 | ) |  | — |  |  | (15 | ) |  | (15 | )
Net amounts presented in the consolidated balance sheets |  | $ | 79 |  |  | $ | 84 |  |  | $ | 163 |  |  | $ | 218 |  |  | $ | 1,100 |  |  | $ | 1,318 |  |  | $ | 1,155 |
1 | In addition, at September 30, 2016 and December 31, 2015, SCE had posted $4 million and $31 million, respectively, of cash collateral that is not offset against derivative liabilities and is reflected in "Other current assets" on the consolidated balance sheets.
Summarization of Economic Hedging Activities | The following table summarizes the components of SCE's economic hedging activity:
|  | Three months ended September 30, |  | Nine months ended September 30,
(in millions) |  | 2016 |  | 2015 |  | 2016 |  | 2015
Realized losses |  | $ | (1 | ) |  | $ | (28 | ) |  | $ | (53 | ) |  | $ | (103 | )
Unrealized (losses) gains |  | (2 | ) |  | (67 | ) |  | 6 |  |  | (152 | )
Notional Volumes of Derivative Instruments | The following table summarizes the notional volumes of derivatives used for SCE hedging activities:
|  |  |  | Economic Hedges
Commodity |  | Unit of Measure |  | September 30, 2016 |  | December 31, 2015
Electricity options, swaps and forwards |  | GWh |  | 1,872 |  |  | 6,221
Natural gas options, swaps and forwards |  | Bcf |  | 13 |  |  | 32
Congestion revenue rights |  | GWh |  | 85,430 |  |  | 109,740
Tolling arrangements |  | GWh |  | 63,654 |  |  | 70,663

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