GENERAL INFORMATION AND OTHER FINANCIAL DATA - TRANSACTIONS WITH AFFILIATES (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Related Party Transaction [Line Items]
Due from unconsolidated affiliates - current	$ 74	$ 54	[1]
Due to unconsolidated affiliates - noncurrent	(278)	(301)	[1]
Due to unconsolidated affiliates, current	(41)	0	[1]
Maximum borrowing capacity	9,900
Tax Sharing Arrangement
Related Party Transaction [Line Items]
Due from unconsolidated affiliates - current	57	41
Various affiliates
Related Party Transaction [Line Items]
Due from unconsolidated affiliates - current	17	13
TAG Pipeline Norte
Related Party Transaction [Line Items]
Due to unconsolidated affiliates, current	(41)	0
San Diego Gas and Electric Company
Related Party Transaction [Line Items]
Due to unconsolidated affiliates, current	(143)	(135)	[1]
Maximum borrowing capacity	1,500
San Diego Gas and Electric Company | Various affiliates
Related Party Transaction [Line Items]
Due to unconsolidated affiliates, current	(16)	(14)
San Diego Gas and Electric Company | Due to/from Sempra Energy
Related Party Transaction [Line Items]
Due to unconsolidated affiliates, current	(52)	(49)
Income taxes due from Sempra Energy	(8)	10
San Diego Gas and Electric Company | Due to/from SoCalGas
Related Party Transaction [Line Items]
Due to unconsolidated affiliates, current	(75)	(72)
Southern California Gas Company
Related Party Transaction [Line Items]
Due from unconsolidated affiliates - current	76	77	[1]
Due to unconsolidated affiliates, current	(36)	(36)	[1]
Maximum borrowing capacity	1,200
Southern California Gas Company | Various affiliates
Related Party Transaction [Line Items]
Due from unconsolidated affiliates - current	1	5
Southern California Gas Company | Due to/from Sempra Energy
Related Party Transaction [Line Items]
Due to unconsolidated affiliates, current	(36)	(36)
Income taxes due from Sempra Energy	(25)	(16)
Southern California Gas Company | Due to/from SDG&E
Related Party Transaction [Line Items]
Due from unconsolidated affiliates - current	75	72
Sempra Infrastructure
Related Party Transaction [Line Items]
Due to unconsolidated affiliates - noncurrent	$ (278)	(301)
Five Point Five Percent Note Due January 2024 | Sempra Infrastructure | TAG Pipeline Norte
Related Party Transaction [Line Items]
Stated rate of debt (as a percent)	5.50%
Due to unconsolidated affiliates - noncurrent	$ 0	(40)
Five Point Five Percent Note Due January 2025 | Sempra Infrastructure | TAG Pipeline Norte
Related Party Transaction [Line Items]
Stated rate of debt (as a percent)	5.50%
Due to unconsolidated affiliates - noncurrent	$ (23)	(23)
Five Point Five Percent Notes Due July 2025 | Sempra Infrastructure | TAG Pipeline Norte
Related Party Transaction [Line Items]
Stated rate of debt (as a percent)	5.50%
Due to unconsolidated affiliates - noncurrent	$ (21)	(21)
Five Point Five Percent Note due January 2026 | Sempra Infrastructure | TAG Pipeline Norte
Related Party Transaction [Line Items]
Stated rate of debt (as a percent)	5.50%
Due to unconsolidated affiliates - noncurrent	$ (19)	(19)
Five Point Five Percent Note due July 2026 | Sempra Infrastructure | TAG Pipeline Norte
Related Party Transaction [Line Items]
Stated rate of debt (as a percent)	5.50%
Due to unconsolidated affiliates - noncurrent	$ (11)	(11)
Five Point Five Percent Note due January 2027 | Sempra Infrastructure | TAG Pipeline Norte
Related Party Transaction [Line Items]
Stated rate of debt (as a percent)	5.50%
Due to unconsolidated affiliates - noncurrent	$ (14)	0
Five Point Seven Four Percent Note December 2029 | Sempra Infrastructure | TAG
Related Party Transaction [Line Items]
Stated rate of debt (as a percent)	5.74%
Due to unconsolidated affiliates - noncurrent	$ (190)	$ (187)

[1] Derived from audited financial statements.