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Commitments and Contingencies (Contingencies) (Details) a in Thousands | 12 Months Ended | 13 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2018 USD ($) | Dec. 31, 2018 USD ($) | May 31, 2019 USD ($) | Jan. 31, 2019 claims | Nov. 30, 2018 a structure fatality | Sep. 30, 2018 claims | Jan. 01, 2018 structure fatality | Dec. 31, 2017 USD ($) a structure fatality
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Charge for wildfire-related claims | $ 4,669,000,000 | $ 4,669,000,000 |  |  |  |  |  | $ 0
SCE |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
High fire risk service area, percent | 35.00% |  |  |  |  |  |  |
Charge for wildfire-related claims | $ 4,669,000,000 | 4,669,000,000 |  |  |  |  |  | $ 0
Wildfire insurance coverage | 1,000,000,000 | 300,000,000 |  |  |  |  |  |
Self insurance | 10,000,000 | 10,000,000 | $ 10,000,000 |  |  |  |  |
Other general liability insurance coverage | 450,000,000 | 450,000,000 |  |  |  |  |  |
SCE | December 2017 Wildfires |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Acres burned | a |  |  |  |  |  |  |  | 280
Structures destroyed | structure |  |  |  |  |  |  |  | 1,063
Structures damaged | structure |  |  |  |  |  |  |  | 280
Fatalities | fatality |  |  |  |  |  |  |  | 2
SCE | Montecito Mudslides |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Structures destroyed | structure |  |  |  |  |  |  | 135 |
Structures damaged | structure |  |  |  |  |  |  | 324 |
Fatalities | fatality |  |  |  |  |  |  | 21 |
Additional fatalities presumed | fatality |  |  |  |  |  |  | 2 |
SCE | November 2018 Wildfires |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Acres burned | a |  |  |  |  | 100 |  |  |
Structures destroyed | structure |  |  |  |  | 1,643 |  |  |
Structures damaged | structure |  |  |  |  | 364 |  |  |
Fatalities | fatality |  |  |  |  | 3 |  |  |
Capital expenditures related to restoration of service | 82,000,000 | 82,000,000 |  |  |  |  |  |
Wildfire insurance coverage | 1,000,000,000 |  |  |  |  |  |  |
Self insurance | 10,000,000 | 10,000,000 |  |  |  |  |  |
SCE | December 2017 Wildfires and Montecito Mudslides |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Capital expenditures related to restoration of service | 89,000,000 | 89,000,000 |  |  |  |  |  |
SCE | 2017/2018 Wildfire/Mudslide Events |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Charge for wildfire-related claims | 4,669,000,000 | 4,669,000,000 |  |  |  |  |  |
Expected insurance recoveries | (2,000,000,000) | (2,000,000,000) |  |  |  |  |  |
Expected revenue from FERC customers | 135,000,000 | $ 135,000,000 |  |  |  |  |  |
Total after-tax charge | $ 1,825,000,000 |  |  |  |  |  |  |
December 2017 Wildfires and Montecito Mudslides |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Lawsuits | claims |  |  |  |  |  | 2 |  |
San Onofre OII | Subsequent event |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Lawsuits | claims |  |  |  | 2 |  |  |  |

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