GENERAL INFORMATION AND OTHER FINANCIAL DATA - INVENTORIES (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Inventory [Line Items]
Natural gas	$ 166	$ 174
LNG	13	9
Materials and supplies	340	299
Total	519	482	[1]
SDG&E
Inventory [Line Items]
Natural gas	1	1
LNG	0	0
Materials and supplies	181	152
Total	182	153	[1]
SoCalGas
Inventory [Line Items]
Natural gas	153	155
LNG	0	0
Materials and supplies	130	122
Total	$ 283	$ 277	[1]

[1] Derived from audited financial statements.