Commitments and Contingencies (Recovery of Wildfire-Related Costs) (Details) - USD ($) $ in Millions			1 Months Ended
	Jan. 01, 2020	Jul. 12, 2019	Apr. 30, 2019
Southern California Edison | CPUC
Loss Contingencies [Line Items]
Additional ROE			6.00%
Southern California Edison | FERC
Loss Contingencies [Line Items]
Additional ROE			6.00%
Subsequent event | Southern California Edison
Loss Contingencies [Line Items]
Initial contribution		$ 2,400
Annual contribution		95
Subsequent event | SCE, SDG&E and PG&E
Loss Contingencies [Line Items]
Annual contribution		3,000
Subsequent event | SCE and SDG&E
Loss Contingencies [Line Items]
Initial contribution		2,700
Annual contribution		$ 1,000
Forecast
Loss Contingencies [Line Items]
Anticipated raise from issuance of equity	$ 1,200
Forecast | Southern California Edison
Loss Contingencies [Line Items]
Anticipated issuance of long-term debt	$ 1,200
Forecast | Subsequent event | Southern California Edison
Loss Contingencies [Line Items]
Maximum aggregate requirement to reimburse the insurance fund percent		20.00%
Initial Liability Cap		$ 2,500
Excluded wildfire risk mitigation capital expenditures		$ 1,600