GENERAL INFORMATION AND OTHER FINANCIAL DATA - INVENTORIES (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Inventory [Line Items]
Natural gas	$ 105	$ 163
LNG	12	27
Materials and supplies	451	369
Total	568	559	[1]
SDG&E
Inventory [Line Items]
Natural gas	1	1
LNG	0	0
Materials and supplies	231	201
Total	232	202	[2]
SoCalGas
Inventory [Line Items]
Natural gas	95	148
LNG	0	0
Materials and supplies	143	139
Total	$ 238	$ 287	[1]

[1] Derived from audited financial statements.

[2] Derived from audited financial statements.