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Derivative Instruments (Balance Sheet Disclosures) (Details) - Southern California Edison Company - Commodity derivative contracts - USD ($) $ in Millions | Sep. 30, 2016 | Dec. 31, 2015
--- | --- | ---
Electric Utility |  |
Derivative Assets |  |
Gross amounts recognized | $ 129 | $ 165
Gross amounts offset in the consolidated balance sheets | (2) | (2)
Cash collateral posted | 0 | 0
Net amounts presented in the consolidated balance sheets | 127 | 163
Derivative Liabilities |  |
Gross amounts recognized | 1,295 | 1,335
Gross amounts offset in the consolidated balance sheets | (2) | (2)
Cash collateral posted | (1) | (15)
Net amounts presented in the consolidated balance sheets | 1,292 | 1,318
Net Liability |  |
Gross amounts recognized | 1,166 | 1,170
Gross amounts offset in the consolidated balance sheets | 0 | 0
Cash collateral posted | (1) | (15)
Net amounts presented in the consolidated balance sheets | 1,165 | 1,155
Other Current Assets [Member] |  |
Net Liability |  |
Cash collateral | 4 | 31
Derivative Assets, Long-Term | Electric Utility |  |
Derivative Assets |  |
Gross amounts recognized | 67 | 84
Gross amounts offset in the consolidated balance sheets | 0 | 0
Cash collateral posted | 0 | 0
Net amounts presented in the consolidated balance sheets | 67 | 84
Derivative Liability, Short-Term | Electric Utility |  |
Derivative Liabilities |  |
Gross amounts recognized | 226 | 235
Gross amounts offset in the consolidated balance sheets | (2) | (2)
Cash collateral posted | (1) | (15)
Net amounts presented in the consolidated balance sheets | 223 | 218
Derivative Liability, Long-Term | Electric Utility |  |
Derivative Liabilities |  |
Gross amounts recognized | 1,069 | 1,100
Gross amounts offset in the consolidated balance sheets | 0 | 0
Cash collateral posted | 0 | 0
Net amounts presented in the consolidated balance sheets | 1,069 | 1,100
Derivative Assets, Short-Term | Electric Utility |  |
Derivative Assets |  |
Gross amounts recognized | 62 | 81
Gross amounts offset in the consolidated balance sheets | (2) | (2)
Cash collateral posted | 0 | 0
Net amounts presented in the consolidated balance sheets | $ 60 | $ 79

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