Commitments and Contingencies - Environmental Remediation (Details) $ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($) site	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Commitments and Contingencies
Environmental loss contingency, statement of financial position flag	Other deferred credits and other long-term liabilities
SCE
Commitments and Contingencies
Recorded estimated minimum liability	$ 235
Environmental remediation regulatory assets	222
Expected recovery from incentive mechanism	$ 35
Expected recovery from incentive mechanism (percent)	90.00%
Recovery through customer rates	$ 187
Recovery through customer rates (percent)	100.00%
Clean up (period)	35 years
Expected remediation costs, low end of range	$ 9
Expected remediation costs, high end of range	21
Environmental remediation expense	$ 17	$ 11	$ 7
Material sites | SCE
Commitments and Contingencies
Identified remediation sites (number) | site	21
Minimum estimated liability	$ 1
Recorded estimated minimum liability	232
Cost may exceed liability	118
Material sites | SCE | San Onofre
Commitments and Contingencies
Recorded estimated minimum liability	$ 154
Immaterial sites | SCE
Commitments and Contingencies
Identified remediation sites (number) | site	19
Recorded estimated minimum liability	$ 3
Cost may exceed liability	$ 2