SEGMENT INFORMATION - SCHEDULE (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	$ 3,335	$ 3,547	$ 9,895	$ 7,367
DEPRECIATION AND AMORTIZATION	549	501	1,088	994
INTEREST INCOME	17	15	41	40
INTEREST EXPENSE	317	271	683	514
INCOME TAX EXPENSE (BENEFIT)	175	80	551	414
Equity earnings, before income tax:	153	159	285	302
Equity earnings, net of income tax:	235	216	322	399
Equity earnings	388	375	607	701
EARNINGS (LOSSES) ATTRIBUTABLE TO COMMON SHARES	603	559	1,572	1,171
Segment Reporting Information, Additional Information [Abstract]
EXPENDITURES FOR PROPERTY, PLANT & EQUIPMENT			4,282	2,361
ASSETS	82,727		82,727		$ 78,574	[1]
EQUITY METHOD INVESTMENTS	16,015		16,015		15,677
Operating Segments | SDG&E
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	1,262	1,399	2,915	2,844
DEPRECIATION AND AMORTIZATION	268	244	530	483
INTEREST INCOME	4	1	5	1
INTEREST EXPENSE	123	114	241	220
INCOME TAX EXPENSE (BENEFIT)	4	42	11	106
EARNINGS (LOSSES) ATTRIBUTABLE TO COMMON SHARES	184	176	442	410
Segment Reporting Information, Additional Information [Abstract]
EXPENDITURES FOR PROPERTY, PLANT & EQUIPMENT			1,239	1,090
ASSETS	27,786		27,786		26,422
Operating Segments | SoCalGas
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	1,467	1,501	5,261	3,494
DEPRECIATION AND AMORTIZATION	208	188	414	375
INTEREST INCOME	1	1	5	1
INTEREST EXPENSE	71	45	140	85
INCOME TAX EXPENSE (BENEFIT)	(21)	19	73	103
EARNINGS (LOSSES) ATTRIBUTABLE TO COMMON SHARES	155	87	515	421
Segment Reporting Information, Additional Information [Abstract]
EXPENDITURES FOR PROPERTY, PLANT & EQUIPMENT			961	931
ASSETS	22,591		22,591		22,346
Operating Segments | Sempra Texas Utilities
Segment Reporting Information, Profit (Loss) [Abstract]
Equity earnings, before income tax:	2	3	3	5
Equity earnings, net of income tax:	160	184	243	346
EARNINGS (LOSSES) ATTRIBUTABLE TO COMMON SHARES	160	186	243	348
Segment Reporting Information, Additional Information [Abstract]
ASSETS	13,988		13,988		13,781
EQUITY METHOD INVESTMENTS	13,979		13,979		13,772
Operating Segments | Sempra Infrastructure
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	660	689	1,856	1,113
DEPRECIATION AND AMORTIZATION	70	67	139	132
INTEREST INCOME	6	9	21	30
INTEREST EXPENSE	25	32	120	59
INCOME TAX EXPENSE (BENEFIT)	201	70	531	161
Equity earnings, before income tax:	151	156	282	297
Equity earnings, net of income tax:	75	32	79	53
EARNINGS (LOSSES) ATTRIBUTABLE TO COMMON SHARES	208	183	523	278
Segment Reporting Information, Additional Information [Abstract]
EXPENDITURES FOR PROPERTY, PLANT & EQUIPMENT			2,078	336
ASSETS	17,610		17,610		15,760
EQUITY METHOD INVESTMENTS	2,036		2,036		1,905
Adjustments and eliminations
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	(2)	(2)	(1)	0
All other
Segment Reporting Information, Profit (Loss) [Abstract]
DEPRECIATION AND AMORTIZATION	3	2	5	4
INTEREST INCOME	6	4	10	8
INTEREST EXPENSE	99	81	183	151
INCOME TAX EXPENSE (BENEFIT)	(9)	(51)	(64)	44
EARNINGS (LOSSES) ATTRIBUTABLE TO COMMON SHARES	(104)	(73)	(151)	(286)
Segment Reporting Information, Additional Information [Abstract]
EXPENDITURES FOR PROPERTY, PLANT & EQUIPMENT			4	4
ASSETS	1,773		1,773		1,376
Intersegment revenues and eliminations
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	(52)	(40)	(136)	(84)
INTEREST EXPENSE	(1)	(1)	(1)	(1)
Segment Reporting Information, Additional Information [Abstract]
ASSETS	(1,021)		(1,021)		$ (1,111)
Intersegment revenues and eliminations | SDG&E
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	(5)	(3)	(9)	(7)
Intersegment revenues and eliminations | SoCalGas
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	(28)	(23)	(62)	(49)
Intersegment revenues and eliminations | Sempra Infrastructure
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	$ (19)	$ (14)	$ (65)	$ (28)

[1] Derived from audited financial statements.