Commitments and Contingencies (Current Wildfire Insurance Coverage) (Details) - USD ($)	12 Months Ended			13 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Nov. 30, 2018	Jun. 30, 2020	Jun. 30, 2019	Feb. 28, 2019
Loss Contingencies [Line Items]
Regulatory assets		$ 5,380,000,000			$ 5,469,000,000
Southern California Edison
Loss Contingencies [Line Items]
Wildfire-specific insurance coverage		1,000,000,000	$ 300,000,000
Self-insured retention		10,000,000
Net Regulatory Assets					107,000,000
Regulatory assets		$ 5,380,000,000			5,469,000,000
Southern California Edison | Wildfire insurance costs
Loss Contingencies [Line Items]
Regulatory assets					$ 193,000,000
Southern California Edison | Wildfire liability insurance recovery | Regulatory balancing accounts
Loss Contingencies [Line Items]
Net Regulatory Assets						$ 107,000,000
Southern California Edison | Forecast
Loss Contingencies [Line Items]
Wildfire-specific insurance coverage				$ 1,200,000,000
Co-Insurance per wildfire occurrence				115,000,000
Self-insured retention				50,000,000
Wildfire-specific insurance coverage, net				$ 1,000,000,000
Wildfire insurance expense	$ 400,000,000