DEBT AND CREDIT FACILITIES - UNCOMMITTED LETTERS OF CREDIT (Details) $ in Millions	Sep. 30, 2024 USD ($)
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 9,900
SDG&E
Line of Credit Facility [Line Items]
Maximum borrowing capacity	1,500
SoCalGas
Line of Credit Facility [Line Items]
Maximum borrowing capacity	1,200
Uncommitted Letters of Credit Outstanding
Line of Credit Facility [Line Items]
Letters of credit outstanding	491
Uncommitted Letters of Credit Outstanding | SDG&E
Line of Credit Facility [Line Items]
Letters of credit outstanding	26
Uncommitted Letters of Credit Outstanding | SoCalGas
Line of Credit Facility [Line Items]
Letters of credit outstanding	20
Uncommitted Letters of Credit Outstanding | Other Sempra
Line of Credit Facility [Line Items]
Letters of credit outstanding	$ 445