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Derivative Instruments (Balance Sheet Disclosures) (Details) - Southern California Edison Company - Electric Utility - USD ($) $ in Millions | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Economic Hedges |  |
Net Assets |  |
Cash collateral not offset against derivative liabilities | $ 11 |
Commodity derivative contracts |  |
Derivative Assets |  |
Gross amounts recognized | 112 | $ 173
Gross amounts offset in the consolidated balance sheets | (1) | 0
Cash collateral posted | 0 | 0
Net amounts presented in the consolidated balance sheets | 111 | 173
Derivative Liabilities |  |
Gross amounts recognized | 2 | 13
Gross amounts offset in the consolidated balance sheets | (1) | 0
Cash collateral posted | 0 | (7)
Net amounts presented in the consolidated balance sheets | 1 | 6
Net Assets |  |
Gross amounts recognized | 110 | 160
Gross amounts offset in the consolidated balance sheets | 0 | 0
Cash collateral posted | 0 | 7
Net amounts presented in the consolidated balance sheets | 110 | 167
Commodity derivative contracts | Derivative Assets, Short-Term |  |
Derivative Assets |  |
Gross amounts recognized | 102 | 171
Gross amounts offset in the consolidated balance sheets | (1) | 0
Cash collateral posted | 0 | 0
Net amounts presented in the consolidated balance sheets | 101 | 171
Commodity derivative contracts | Derivative Assets, Long-Term |  |
Derivative Assets |  |
Gross amounts recognized | 10 | 2
Gross amounts offset in the consolidated balance sheets | 0 | 0
Cash collateral posted | 0 | 0
Net amounts presented in the consolidated balance sheets | 10 | 2
Commodity derivative contracts | Derivative Liability, Short-Term |  |
Derivative Liabilities |  |
Gross amounts recognized | 2 | 13
Gross amounts offset in the consolidated balance sheets | (1) | 0
Cash collateral posted | 0 | (7)
Net amounts presented in the consolidated balance sheets | 1 | 6
Commodity derivative contracts | Derivative Liability, Long-Term |  |
Derivative Liabilities |  |
Gross amounts recognized | 0 | 0
Gross amounts offset in the consolidated balance sheets | 0 | 0
Cash collateral posted | 0 | 0
Net amounts presented in the consolidated balance sheets | $ 0 | $ 0

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