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Commitments and Contingencies (Southern California Wildfires) (Details) - Southern California Edison a in Thousands, $ in Millions | 5 Months Ended | 6 Months Ended | 7 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
May 31, 2019 USD ($) | Jun. 30, 2018 USD ($) | Dec. 30, 2018 USD ($) | Dec. 31, 2017 USD ($) a fatality structure | May 31, 2018 USD ($)
Loss Contingencies [Line Items] |  |  |  |  |
Wildfire-specific insurance coverage |  |  |  | $ 1,000 |
Self-insured retention per wildfire occurrence |  |  |  | $ 10 | $ 10
Coverage for future periods |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Wildfire-specific insurance coverage | $ 940 |  | $ 1,000 |  |
December 2017 Wildfires |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Acres burned | a |  |  |  | 280 |
Structures destroyed | structure |  |  |  | 1,063 |
Structures damaged | structure |  |  |  | 280 |
Fatalities | fatality |  |  |  | 1 |
Capital expenditures |  | $ 77 |  |  |

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- Definition Acres Burned + References No definition available. + Details
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- Definition Fatalities + References No definition available. + Details
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- Definition This element represents the increase in self insurance retention per wildfire occurrence. + References No definition available. + Details
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- Definition Structures Damaged + References No definition available. + Details
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- Definition Structures Destroyed + References No definition available. + Details
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- Definition Wildfire Insurance Coverage + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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- Details
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- Details
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