COMMITMENTS AND CONTINGENCIES - LEASE INFORMATION (Details) $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($) agreement	Mar. 31, 2022 USD ($)
Lessee, Lease, Description [Line Items]
Interest income	$ 2	$ 2
Total revenues from sales-type leases(1)	2	2
Fixed lease payments	80	70
Variable lease payments	2	1
Total revenues from operating leases	82	71
Depreciation expense	$ 15	$ 13
San Diego Gas and Electric Company
Lessee, Lease, Description [Line Items]
Number of energy storage agreements | agreement	5
Lease not yet commenced, remainder of year	$ 11
Lease not yet commenced, year one	45
Lease not yet commenced, year two	54
Lease not yet commenced, year three	54
Lease not yet commenced, year four	54
Lease not yet commenced, thereafter	447
Southern California Gas Company
Lessee, Lease, Description [Line Items]
Finance lease not yet commenced, remainder of fiscal year	1
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