SAN ONOFRE NUCLEAR GENERATING STATION - NARRATIVE (Details) - San Diego Gas and Electric Company $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($)
Jointly Owned Utility Plant Interests [Line Items]
Period of environmental exit	10 years
Percentage of environmental exit costs incurred	20.00%
San Onofre Nuclear Generating Station (SONGS)
Jointly Owned Utility Plant Interests [Line Items]
Ownership percentage	20.00%
SONGS Units 2 and 3 Decommissioning
Jointly Owned Utility Plant Interests [Line Items]
Nuclear decommissioning trust authorized withdrawal amount	$ 81