SEGMENT INFORMATION (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) segment	Jun. 30, 2021 USD ($)	Jun. 01, 2022	Dec. 31, 2021 USD ($)		May 31, 2021	Apr. 30, 2021
Segment Reporting Information [Line Items]
Number of reportable segments | segment			4
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	$ 3,547	$ 2,741	$ 7,367	$ 6,000
DEPRECIATION AND AMORTIZATION	501	463	994	905
INTEREST INCOME	15	15	40	34
INTEREST EXPENSE	271	258	514	517
INCOME TAX EXPENSE (BENEFIT)	80	139	414	297
Equity earnings, before income tax:	159	185	302	320
Equity earnings (losses), net of income tax:	216	128	399	311
Equity earnings	375	313	701	631
EARNINGS (LOSSES) ATTRIBUTABLE TO COMMON SHARES	559	424	1,171	1,298
Segment Reporting Information, Additional Information [Abstract]
EXPENDITURES FOR PROPERTY, PLANT & EQUIPMENT			2,361	2,424
ASSETS	75,582		75,582			$ 72,045	[1]
EQUITY METHOD AND OTHER INVESTMENTS	15,093		15,093			14,472
Operating Segments | SDG&E
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	1,399	1,318	2,844	2,655
DEPRECIATION AND AMORTIZATION	244	220	483	433
INTEREST INCOME	1	0	1	1
INTEREST EXPENSE	114	101	220	203
INCOME TAX EXPENSE (BENEFIT)	42	33	106	78
EARNINGS (LOSSES) ATTRIBUTABLE TO COMMON SHARES	176	186	410	398
Segment Reporting Information, Additional Information [Abstract]
EXPENDITURES FOR PROPERTY, PLANT & EQUIPMENT			1,090	1,072
ASSETS	25,075		25,075			24,058
Operating Segments | SoCalGas
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	1,501	1,124	3,494	2,632
DEPRECIATION AND AMORTIZATION	188	180	375	353
INTEREST INCOME	1	0	1	0
INTEREST EXPENSE	45	40	85	79
INCOME TAX EXPENSE (BENEFIT)	19	8	103	102
EARNINGS (LOSSES) ATTRIBUTABLE TO COMMON SHARES	87	94	421	501
Segment Reporting Information, Additional Information [Abstract]
EXPENDITURES FOR PROPERTY, PLANT & EQUIPMENT			931	936
ASSETS	21,354		21,354			20,324
Operating Segments | Sempra Infrastructure
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	689	341	1,113	790
DEPRECIATION AND AMORTIZATION	67	59	132	113
INTEREST INCOME	9	20	30	41
INTEREST EXPENSE	32	45	59	86
INCOME TAX EXPENSE (BENEFIT)	70	94	161	151
Equity earnings, before income tax:	156	133	297	267
Equity earnings (losses), net of income tax:	32	(9)	53	38
EARNINGS (LOSSES) ATTRIBUTABLE TO COMMON SHARES	183	53	278	255
Segment Reporting Information, Additional Information [Abstract]
EXPENDITURES FOR PROPERTY, PLANT & EQUIPMENT			336	415
ASSETS	14,958		14,958			14,408
EQUITY METHOD AND OTHER INVESTMENTS	1,687		1,687			1,425
Operating Segments | Sempra Texas Utilities
Segment Reporting Information, Profit (Loss) [Abstract]
Equity earnings, before income tax:	3	2	5	3
Equity earnings (losses), net of income tax:	184	137	346	273
EARNINGS (LOSSES) ATTRIBUTABLE TO COMMON SHARES	186	138	348	273
Segment Reporting Information, Additional Information [Abstract]
ASSETS	13,406		13,406			13,047
EQUITY METHOD AND OTHER INVESTMENTS	13,406		13,406			13,047
All other
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	0	1	0	2
DEPRECIATION AND AMORTIZATION	2	4	4	6
INTEREST INCOME	4	1	8	1
INTEREST EXPENSE	81	79	151	162
INCOME TAX EXPENSE (BENEFIT)	(51)	4	44	(34)
Equity earnings, before income tax:	0	50	0	50
EARNINGS (LOSSES) ATTRIBUTABLE TO COMMON SHARES	(73)	(47)	(286)	(129)
Segment Reporting Information, Additional Information [Abstract]
EXPENDITURES FOR PROPERTY, PLANT & EQUIPMENT			4	1
ASSETS	1,984		1,984			1,399
Adjustments and eliminations
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	(2)	(1)	0	(1)
Intercompany eliminations
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	(40)	(42)	(84)	(78)
INTEREST INCOME	0	(6)	0	(9)
INTEREST EXPENSE	(1)	(7)	(1)	(13)
Segment Reporting Information, Additional Information [Abstract]
ASSETS	(1,195)		(1,195)			$ (1,191)
Intercompany eliminations | SDG&E
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	(3)	(2)	(7)	(4)
Intercompany eliminations | SoCalGas
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	(23)	(23)	(49)	(48)
Intercompany eliminations | Sempra Infrastructure
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	$ (14)	$ (17)	$ (28)	$ (26)
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%			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.