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Balance Sheet Components Electric Utility Plant, Net (Details) - USD ($) $ in Millions | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Property, Plant and Equipment [Line Items] |  |
Electric utility plant | $ 11,163 | $ 10,928
Construction work-in-progress | 376 | 328
Total cost | 11,539 | 11,256
Less: accumulated depreciation and amortization | (4,238) | (4,095)
Electric utility plant, net | $ 7,301 | $ 7,161

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