GENERAL INFORMATION AND OTHER FINANCIAL DATA - INVENTORIES (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Inventory [Line Items]
Natural gas	$ 249	$ 164
LNG	32	27
Materials and supplies	225	198
Total	506	389	[1]
San Diego Gas and Electric Company
Inventory [Line Items]
Natural gas	1	0
LNG	0	0
Materials and supplies	128	123
Total	129	123	[1]
Southern California Gas Company
Inventory [Line Items]
Natural gas	214	114
LNG	0	0
Materials and supplies	79	58
Total	$ 293	$ 172	[1]

[1] Derived from audited financial statements.