COMMITMENTS AND CONTINGENCIES - LEASE INFORMATION (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Lessee, Lease, Description [Line Items]
Interest income	$ 2	$ 0	$ 4	$ 0
Total revenues from sales-type leases	2	0	4	0
Fixed lease payments	70	59	140	112
Variable lease payments	3	1	4	1
Total revenues from operating leases	73	60	144	113
Depreciation expense	$ 14	$ 12	27	$ 22
San Diego Gas and Electric Company
Lessee, Lease, Description [Line Items]
Lease not yet commenced, remainder of year			7
Lease not yet commenced, year one			18
Lease not yet commenced, year two			18
Lease not yet commenced, year three			18
Lease not yet commenced, year four			18
Lease not yet commenced, thereafter			101
Southern California Gas Company
Lessee, Lease, Description [Line Items]
Finance lease not yet commenced, year one			2
Finance lease not yet commenced, year two			2
Finance lease not yet commenced, year three			2
Finance lease not yet commenced, year four			2
Finance lease not yet commenced, year thereafter			$ 10