GENERAL INFORMATION AND OTHER FINANCIAL DATA - INVENTORIES (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Inventory [Line Items]
Natural gas	$ 41	$ 106
LNG	7	62
Materials and supplies	267	235
Total	315	403	[1]
San Diego Gas and Electric Company
Inventory [Line Items]
Natural gas	1	1
LNG	0	0
Materials and supplies	142	133
Total	143	134	[1]
Southern California Gas Company
Inventory [Line Items]
Natural gas	24	74
LNG	0	0
Materials and supplies	106	85
Total	$ 130	$ 159	[1]

[1] Derived from audited financial statements.