SIGNIFICANT ACCOUNTING POLICIES AND OTHER FINANCIAL DATA - CAPITALIZED FINANCING COSTS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Capitalized Financing Costs Disclosure [Line Items]
Total capitalized financing costs	$ 255	$ 217	$ 202
San Diego Gas and Electric Company
Capitalized Financing Costs Disclosure [Line Items]
Total capitalized financing costs	116	106	104
SoCalGas
Capitalized Financing Costs Disclosure [Line Items]
Total capitalized financing costs	$ 73	$ 64	$ 55