SEGMENT INFORMATION (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) segment	Sep. 30, 2021 USD ($)	Jun. 01, 2022	Dec. 31, 2021 USD ($)		Aug. 31, 2021	May 31, 2021	Apr. 30, 2021
Segment Reporting Information [Line Items]
Number of reportable segments | segment			4
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	$ 3,617	$ 3,013	$ 10,984	$ 9,013
DEPRECIATION AND AMORTIZATION	506	471	1,500	1,376
INTEREST INCOME	18	16	58	50
INTEREST EXPENSE	282	259	796	776
INCOME TAX EXPENSE (BENEFIT)	21	(342)	435	(45)
Equity earnings, before income tax:	134	137	436	457
Equity earnings, net of income tax:	283	254	682	565
Equity earnings	417	391	1,118	1,022
EARNINGS (LOSSES) ATTRIBUTABLE TO COMMON SHARES	485	(648)	1,656	650
Segment Reporting Information, Additional Information [Abstract]
EXPENDITURES FOR PROPERTY, PLANT & EQUIPMENT			3,540	3,606
ASSETS	75,563		75,563			$ 72,045	[1]
EQUITY METHOD AND OTHER INVESTMENTS	15,434		15,434			14,472
Operating Segments | SDG&E
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	1,569	1,464	4,413	4,119
DEPRECIATION AND AMORTIZATION	247	226	730	659
INTEREST INCOME	2	0	3	1
INTEREST EXPENSE	113	104	333	307
INCOME TAX EXPENSE (BENEFIT)	35	90	141	168
EARNINGS (LOSSES) ATTRIBUTABLE TO COMMON SHARES	271	205	681	603
Segment Reporting Information, Additional Information [Abstract]
EXPENDITURES FOR PROPERTY, PLANT & EQUIPMENT			1,651	1,560
ASSETS	25,759		25,759			24,058
Operating Segments | SoCalGas
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	1,385	1,106	4,879	3,738
DEPRECIATION AND AMORTIZATION	190	180	565	533
INTEREST INCOME	3	0	4	0
INTEREST EXPENSE	50	39	135	118
INCOME TAX EXPENSE (BENEFIT)	(28)	(437)	75	(335)
EARNINGS (LOSSES) ATTRIBUTABLE TO COMMON SHARES	(82)	(1,126)	339	(625)
Segment Reporting Information, Additional Information [Abstract]
EXPENDITURES FOR PROPERTY, PLANT & EQUIPMENT			1,394	1,417
ASSETS	21,325		21,325			20,324
Operating Segments | Sempra Texas Utilities
Segment Reporting Information, Profit (Loss) [Abstract]
INCOME TAX EXPENSE (BENEFIT)	1	0	1	0
Equity earnings, before income tax:	1	0	6	3
Equity earnings, net of income tax:	257	207	603	480
EARNINGS (LOSSES) ATTRIBUTABLE TO COMMON SHARES	256	206	604	479
Segment Reporting Information, Additional Information [Abstract]
ASSETS	13,664		13,664			13,047
EQUITY METHOD AND OTHER INVESTMENTS	13,664		13,664			13,047
Operating Segments | Sempra Infrastructure
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	697	479	1,810	1,269
DEPRECIATION AND AMORTIZATION	67	63	199	176
INTEREST INCOME	7	18	37	59
INTEREST EXPENSE	39	45	98	131
INCOME TAX EXPENSE (BENEFIT)	58	13	219	164
Equity earnings, before income tax:	133	137	430	404
Equity earnings, net of income tax:	26	47	79	85
EARNINGS (LOSSES) ATTRIBUTABLE TO COMMON SHARES	114	164	392	419
Segment Reporting Information, Additional Information [Abstract]
EXPENDITURES FOR PROPERTY, PLANT & EQUIPMENT			489	622
ASSETS	14,490		14,490			14,408
EQUITY METHOD AND OTHER INVESTMENTS	1,770		1,770			1,425
All other
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	1	2	1	4
DEPRECIATION AND AMORTIZATION	2	2	6	8
INTEREST INCOME	6	0	14	1
INTEREST EXPENSE	81	78	232	240
INCOME TAX EXPENSE (BENEFIT)	(45)	(8)	(1)	(42)
Equity earnings, before income tax:	0	0	0	50
EARNINGS (LOSSES) ATTRIBUTABLE TO COMMON SHARES	(74)	(97)	(360)	(226)
Segment Reporting Information, Additional Information [Abstract]
EXPENDITURES FOR PROPERTY, PLANT & EQUIPMENT			6	7
ASSETS	1,363		1,363			1,399
Adjustments and eliminations
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	0	0	0	(1)
Intercompany eliminations
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	(35)	(38)	(119)	(116)
INTEREST INCOME	0	(2)	0	(11)
INTEREST EXPENSE	(1)	(7)	(2)	(20)
Segment Reporting Information, Additional Information [Abstract]
ASSETS	(1,038)		(1,038)			$ (1,191)
Intercompany eliminations | SDG&E
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	(4)	(3)	(11)	(7)
Intercompany eliminations | SoCalGas
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	(24)	(24)	(73)	(72)
Intercompany eliminations | Sempra Infrastructure
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	$ (7)	$ (11)	$ (35)	$ (37)
Oncor Electric Delivery Company LLC Additional Acquisition | Sempra Texas Utilities
Segment Reporting Information [Line Items]
Acquired percentage interest	80.25%		80.25%
Sharyland Holdings, LP | Sempra Texas Utilities
Segment Reporting Information [Line Items]
Acquired percentage interest	50.00%		50.00%
SI Partners | Sempra Infrastructure
Segment Reporting Information [Line Items]
Ownership interest (as a percent)	70.00%		70.00%
Sempra LNG Holding, LP | Sempra Infrastructure
Segment Reporting Information [Line Items]
Ownership interest (as a percent)	100.00%		100.00%
IEnova
Segment Reporting Information [Line Items]
Ownership interest (as a percent)		99.90%		99.90%	99.90%			96.40%	96.40%	70.20%
IEnova | Sempra Infrastructure
Segment Reporting Information [Line Items]
Ownership interest (as a percent)	99.90%		99.90%

[1] Derived from audited financial statements.