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Leases (Supplemental Balance Sheet Information) (Details) - USD ($) $ in Millions | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Operating leases: |  |
Operating lease right-of-use assets | $ 933 | $ 0
Current portion of operating lease liabilities | 157 | 0
Operating lease liabilities | 776 | 0
Southern California Edison |  |
Operating leases: |  |
Operating lease right-of-use assets | 928 | 0
Current portion of operating lease liabilities | 156 | 0
Operating lease liabilities | 772 | $ 0
Total operating lease liabilities | 928 |
Finance leases included in: |  |
Utility property, plant and equipment, gross | 14 |
Accumulated depreciation | (4) |
Utility property, plant and equipment, net | 10 |
Other current liabilities | 1 |
Other long-term liabilities | 9 |
Total finance lease liabilities | $ 10 |

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