SIGNIFICANT ACCOUNTING POLICIES AND OTHER FINANCIAL DATA - INVENTORIES (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Inventory [Line Items]
Natural gas	$ 106	$ 164
LNG	62	27
Materials and supplies	235	198
Total	403	389
San Diego Gas and Electric Company
Inventory [Line Items]
Natural gas	1	0
LNG	0	0
Materials and supplies	133	123
Total	134	123
SoCalGas
Inventory [Line Items]
Natural gas	74	114
LNG	0	0
Materials and supplies	85	58
Total	$ 159	$ 172