SEGMENT INFORMATION (Details) $ in Millions	12 Months Ended			21 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2020 USD ($) segment	Oct. 01, 2021	Sep. 30, 2021	May 31, 2021	Apr. 30, 2021	May 16, 2019
Segment Reporting Information [Line Items]
Number of reportable segments | segment				4
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	$ 12,857	$ 11,370	$ 10,829
DEPRECIATION AND AMORTIZATION	1,855	1,666	1,569
INTEREST INCOME	69	96	87
INTEREST EXPENSE	1,198	1,081	1,077
Income tax expense (benefit)	99	249	315
Earnings (losses) attributable to common shares	1,254	3,764	2,055
Earnings from discontinued operations attributable to common shares	0	1,840	328
Segment Reporting Information, Additional Information [Abstract]
EXPENDITURES FOR PROPERTY, PLANT & EQUIPMENT	5,015	4,676	3,708
ASSETS	72,045	66,623	65,665	$ 66,623
Long-lived assets	58,366	53,831	50,074	53,831
United States
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	11,154	10,205	9,574
Segment Reporting Information, Additional Information [Abstract]
Long-lived assets	50,657	46,902	43,719	46,902
Mexico
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	1,703	1,165	1,255
Segment Reporting Information, Additional Information [Abstract]
Long-lived assets	7,708	6,929	6,355	6,929
Asia
Segment Reporting Information, Additional Information [Abstract]
Long-lived assets	1	0	0	0
Operating Segments | SDG&E
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	5,504	5,313	4,925
DEPRECIATION AND AMORTIZATION	889	801	760
INTEREST INCOME	1	2	4
INTEREST EXPENSE	412	413	411
Income tax expense (benefit)	201	190	171
Earnings (losses) attributable to common shares	819	824	767
Segment Reporting Information, Additional Information [Abstract]
EXPENDITURES FOR PROPERTY, PLANT & EQUIPMENT	2,220	1,942	1,522
ASSETS	24,058	22,311	20,560	22,311
Operating Segments | SoCalGas
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	5,515	4,748	4,525
DEPRECIATION AND AMORTIZATION	716	654	602
INTEREST INCOME	1	2	2
INTEREST EXPENSE	157	158	141
Income tax expense (benefit)	(310)	96	120
Earnings (losses) attributable to common shares	(427)	504	641
Segment Reporting Information, Additional Information [Abstract]
EXPENDITURES FOR PROPERTY, PLANT & EQUIPMENT	1,984	1,843	1,439
ASSETS	20,324	18,460	17,077	18,460
Operating Segments | Sempra Texas Utilities
Segment Reporting Information, Profit (Loss) [Abstract]
Income tax expense (benefit)	0	1	0
Earnings (losses) attributable to common shares	616	579	528
Segment Reporting Information, Additional Information [Abstract]
ASSETS	13,047	12,542	11,619	12,542
Operating Segments | Sempra Renewables
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	0	0	10
INTEREST INCOME	0	0	11
INTEREST EXPENSE	0	0	3
Income tax expense (benefit)	0	0	4
Earnings (losses) attributable to common shares	0	0	59
Segment Reporting Information, Additional Information [Abstract]
EXPENDITURES FOR PROPERTY, PLANT & EQUIPMENT	0	0	2
Operating Segments | Sempra Infrastructure
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	1,997	1,400	1,454
DEPRECIATION AND AMORTIZATION	239	198	193
INTEREST INCOME	75	141	139
INTEREST EXPENSE	205	174	155
Income tax expense (benefit)	238	149	222
Earnings (losses) attributable to common shares	682	580	247
Segment Reporting Information, Additional Information [Abstract]
EXPENDITURES FOR PROPERTY, PLANT & EQUIPMENT	802	879	736
ASSETS	14,408	12,772	13,660	12,772
Adjustment and Elimination [Member]
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	(1)	(3)	(3)
Earnings from discontinued operations attributable to common shares	0	1,840	328
Segment Reporting Information, Additional Information [Abstract]
Assets, discontinued operations	0	0	3,958	0
Intersegment Eliminations [Member]
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	(163)	(90)	(85)
INTEREST INCOME	(11)	(56)	(73)
INTEREST EXPENSE	(20)	(54)	(83)
Segment Reporting Information, Additional Information [Abstract]
ASSETS	(1,191)	(677)	(1,972)	(677)
Intersegment Eliminations [Member] | SDG&E
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	10	5	5
Intersegment Eliminations [Member] | SoCalGas
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	98	88	69
Intersegment Eliminations [Member] | Sempra Infrastructure
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	55	(3)	11
All Other [Member]
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	5	2	3
DEPRECIATION AND AMORTIZATION	11	13	14
INTEREST INCOME	3	7	4
INTEREST EXPENSE	444	390	450
Income tax expense (benefit)	(30)	(187)	(202)
Earnings (losses) attributable to common shares	(436)	(563)	(515)
Segment Reporting Information, Additional Information [Abstract]
EXPENDITURES FOR PROPERTY, PLANT & EQUIPMENT	9	12	9
ASSETS	$ 1,399	$ 1,215	$ 763	$ 1,215
Sempra LNG Holding, LP | Sempra Infrastructure
Segment Reporting Information [Line Items]
Ownership interest (as a percent)	100.00%
IEnova
Segment Reporting Information [Line Items]
Ownership interest (as a percent)					99.90%	99.90%	96.40%	70.20%
IEnova | Sempra Infrastructure
Segment Reporting Information [Line Items]
Ownership interest (as a percent)	99.90%
SI Partners | Sempra Infrastructure
Segment Reporting Information [Line Items]
Ownership interest (as a percent)	80.00%
Oncor Holdings | Oncor Electric Delivery Company LLC | Sempra Texas Utilities
Segment Reporting Information [Line Items]
Ownership interest (as a percent)	80.25%
Sharyland Holdings, LP
Segment Reporting Information [Line Items]
Acquired percentage interest									50.00%
Sharyland Holdings, LP | Sempra Texas Utilities
Segment Reporting Information [Line Items]
Acquired percentage interest									50.00%