SEGMENT INFORMATION (Details) $ in Millions	3 Months Ended
	Mar. 31, 2022 USD ($) segment	Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment	4
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	$ 3,820	$ 3,259
DEPRECIATION AND AMORTIZATION	493	442
INTEREST INCOME	25	19
INTEREST EXPENSE	243	259
Income Tax Expense (Benefit)	334	158
Equity earnings, before income tax:	143	135
Equity earnings, net of income tax:	183	183
Equity earnings	326	318
EARNINGS (LOSSES) ATTRIBUTABLE TO COMMON SHARES	612	874
Segment Reporting Information, Additional Information [Abstract]
EXPENDITURES FOR PROPERTY, PLANT & EQUIPMENT	1,204	1,181
ASSETS	74,922		$ 72,045	[1]
EQUITY METHOD AND OTHER INVESTMENTS	14,790		14,472
Operating Segments | SDG&E
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	1,445	1,337
DEPRECIATION AND AMORTIZATION	239	213
INTEREST INCOME	0	1
INTEREST EXPENSE	106	102
Income Tax Expense (Benefit)	64	45
EARNINGS (LOSSES) ATTRIBUTABLE TO COMMON SHARES	234	212
Segment Reporting Information, Additional Information [Abstract]
EXPENDITURES FOR PROPERTY, PLANT & EQUIPMENT	552	555
ASSETS	24,835		24,058
Operating Segments | SoCalGas
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	1,993	1,508
DEPRECIATION AND AMORTIZATION	187	173
INTEREST EXPENSE	40	39
Income Tax Expense (Benefit)	84	94
EARNINGS (LOSSES) ATTRIBUTABLE TO COMMON SHARES	334	407
Segment Reporting Information, Additional Information [Abstract]
EXPENDITURES FOR PROPERTY, PLANT & EQUIPMENT	468	459
ASSETS	21,205		20,324
Operating Segments | Sempra Infrastructure
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	424	449
DEPRECIATION AND AMORTIZATION	65	54
INTEREST INCOME	21	21
INTEREST EXPENSE	27	41
Income Tax Expense (Benefit)	91	57
Equity earnings, before income tax:	141	134
Equity earnings, net of income tax:	21	47
EARNINGS (LOSSES) ATTRIBUTABLE TO COMMON SHARES	95	202
Segment Reporting Information, Additional Information [Abstract]
EXPENDITURES FOR PROPERTY, PLANT & EQUIPMENT	182	166
ASSETS	14,435		14,408
EQUITY METHOD AND OTHER INVESTMENTS	1,572		1,425
Operating Segments | Sempra Texas Utilities
Segment Reporting Information, Profit (Loss) [Abstract]
Equity earnings, before income tax:	2	1
Equity earnings, net of income tax:	162	136
EARNINGS (LOSSES) ATTRIBUTABLE TO COMMON SHARES	162	135
Segment Reporting Information, Additional Information [Abstract]
ASSETS	13,218		13,047
EQUITY METHOD AND OTHER INVESTMENTS	13,218		13,047
All other
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	0	1
DEPRECIATION AND AMORTIZATION	2	2
INTEREST INCOME	4	0
INTEREST EXPENSE	70	83
Income Tax Expense (Benefit)	95	(38)
EARNINGS (LOSSES) ATTRIBUTABLE TO COMMON SHARES	(213)	(82)
Segment Reporting Information, Additional Information [Abstract]
EXPENDITURES FOR PROPERTY, PLANT & EQUIPMENT	2	1
ASSETS	2,430		1,399
Adjustments and eliminations
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	2	0
Intercompany eliminations
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	(44)	(36)
INTEREST INCOME	0	(3)
INTEREST EXPENSE	0	(6)
Segment Reporting Information, Additional Information [Abstract]
ASSETS	(1,201)		$ (1,191)
Intercompany eliminations | SDG&E
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	4	2
Intercompany eliminations | SoCalGas
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	26	25
Intercompany eliminations | Sempra Infrastructure
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	$ 14	$ 9
Oncor Electric Delivery Company LLC Additional Acquisition | Sempra Texas Utilities
Segment Reporting Information [Line Items]
Acquired percentage interest	80.25%
Sharyland Holdings, LP | Sempra Texas Utilities
Segment Reporting Information [Line Items]
Acquired percentage interest	50.00%
SI Partners | Sempra Infrastructure
Segment Reporting Information [Line Items]
Ownership interest (as a percent)	80.00%
Sempra LNG Holding, LP | Sempra Infrastructure
Segment Reporting Information [Line Items]
Ownership interest (as a percent)	100.00%
IEnova | Sempra Infrastructure
Segment Reporting Information [Line Items]
Ownership interest (as a percent)	99.90%

[1] Derived from audited financial statements.