DEBT AND CREDIT FACILITIES - UNCOMMITTED LETTERS OF CREDIT (Details) $ in Millions	Sep. 30, 2023 USD ($)
Line of Credit Facility [Line Items]
Uncommitted letters of credit outstanding	$ 508
Letters of credit outstanding
Line of Credit Facility [Line Items]
Uncommitted letters of credit outstanding	508
Letters of credit outstanding | San Diego Gas and Electric Company
Line of Credit Facility [Line Items]
Uncommitted letters of credit outstanding	15
Letters of credit outstanding | Southern California Gas Company
Line of Credit Facility [Line Items]
Uncommitted letters of credit outstanding	20
Letters of credit outstanding | Sempra Infrastructure
Line of Credit Facility [Line Items]
Uncommitted letters of credit outstanding	307
Letters of credit outstanding | Parent and Other
Line of Credit Facility [Line Items]
Uncommitted letters of credit outstanding	$ 166