COMMITMENTS AND CONTINGENCIES - LEASE INFORMATION NARRATIVE (Details) - San Diego Gas and Electric Company $ in Millions	9 Months Ended
	Sep. 30, 2023 USD ($) agreement
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 two	13
Undiscounted lease payments due year three	13
Undiscounted lease payments due year one	13
Undiscounted lease payments due year four	13
Undiscounted lease payments due thereafter	$ 66
Purchased-Power Contracts
Lessee, Lease, Description [Line Items]
Number of purchased-power contracts | agreement	7
Lease not yet commenced, year one	$ 32
Lease not yet commenced, year two	61
Lease not yet commenced, year three	82
Lease not yet commenced, year four	83
Lease not yet commenced, thereafter	$ 919