GENERAL INFORMATION AND OTHER FINANCIAL DATA - INVENTORIES (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Inventory [Line Items]
Natural gas	$ 138	$ 164
LNG	31	27
Materials and supplies	208	198
Total	377	389	[1]
San Diego Gas and Electric Company
Inventory [Line Items]
Natural gas	0	0
LNG	0	0
Materials and supplies	124	123
Total	124	123	[1]
Southern California Gas Company
Inventory [Line Items]
Natural gas	102	114
LNG	0	0
Materials and supplies	67	58
Total	$ 169	$ 172	[1]

[1] Derived from audited financial statements.