Commitments and Contingencies (Current Wildfire Insurance Coverage) (Details) - USD ($)	1 Months Ended	4 Months Ended	11 Months Ended	12 Months Ended			13 Months Ended
	Apr. 30, 2019	May 31, 2019	May 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Nov. 30, 2018	Jun. 30, 2020	Mar. 31, 2019	Feb. 28, 2019
Loss Contingencies [Line Items]
Regulatory assets					$ 5,380,000,000			$ 5,268,000,000
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			5,268,000,000
Southern California Edison | Wildfire insurance costs
Loss Contingencies [Line Items]
Regulatory assets								$ 148,000,000
Southern California Edison | Forecast
Loss Contingencies [Line Items]
Wildfire-specific insurance coverage		$ 735,000,000	$ 1,000,000,000				$ 1,200,000,000
Self-insured retention		35,000,000	10,000,000				50,000,000
Co-Insurance per wildfire occurrence		15,000,000	$ 15,000,000				115,000,000
Wildfire-specific insurance coverage, net		$ 685,000,000					1,000,000,000
Expected wildfire-specific insurance coverage							$ 10,000,000
Wildfire insurance expense				$ 399,000,000
Wildfire liability insurance recovery | Regulatory balancing accounts | Southern California Edison
Loss Contingencies [Line Items]
Net Regulatory Assets									$ 107,000,000
FERC | Subsequent event | Southern California Edison | Forecast
Loss Contingencies [Line Items]
Additional ROE	6.00%