COMMITMENTS AND CONTINGENCIES - LEASE INFORMATION NARRATIVE (Details) $ in Millions	6 Months Ended
	Jun. 30, 2023 USD ($) agreement
San Diego Gas and Electric Company
Lessee, Lease, Description [Line Items]
Right-of-use asset and lease liability	$ 101
Undiscounted lease payments due remainder of the year	9
Undiscounted lease payments due year one	13
Undiscounted lease payments due year two	13
Undiscounted lease payments due year three	13
Undiscounted lease payments due year four	13
Undiscounted lease payments due thereafter	$ 66
Number of energy storage agreements | agreement	4
Lease not yet commenced, remainder of year	$ 1
Lease not yet commenced, year one	32
Lease not yet commenced, year two	41
Lease not yet commenced, year three	41
Lease not yet commenced, year four	40
Lease not yet commenced, thereafter	377
Southern California Gas Company
Lessee, Lease, Description [Line Items]
Finance lease not yet commenced, year one	1
Finance lease not yet commenced, year two	1
Finance lease not yet commenced, year three	1
Finance lease not yet commenced, year four	1
Finance lease not yet commenced, year thereafter	$ 6