SEGMENT INFORMATION - SCHEDULE (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	$ 3,334	$ 3,617	$ 13,229	$ 10,984
DEPRECIATION AND AMORTIZATION	563	506	1,651	1,500
INTEREST INCOME	19	18	60	58
INTEREST EXPENSE	312	282	995	796
INCOME TAX (BENEFIT) EXPENSE	(52)	21	499	435
Equity earnings, before income tax:	133	134	418	436
Equity earnings, net of income tax:	346	283	668	682
Equity earnings	479	417	1,086	1,118
EARNINGS (LOSSES) ATTRIBUTABLE TO COMMON SHARES	721	485	2,293	1,656
Segment Reporting Information, Additional Information [Abstract]
EXPENDITURES FOR PROPERTY, PLANT & EQUIPMENT			6,074	3,540
ASSETS	85,735		85,735		$ 78,574	[1]
EQUITY METHOD INVESTMENTS	16,356		16,356		15,677
Operating Segments | SDG&E
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	1,442	1,569	4,357	4,413
DEPRECIATION AND AMORTIZATION	280	247	810	730
INTEREST INCOME	7	2	12	3
INTEREST EXPENSE	126	113	367	333
INCOME TAX (BENEFIT) EXPENSE	(15)	35	(4)	141
EARNINGS (LOSSES) ATTRIBUTABLE TO COMMON SHARES	274	271	716	681
Segment Reporting Information, Additional Information [Abstract]
EXPENDITURES FOR PROPERTY, PLANT & EQUIPMENT			1,893	1,651
ASSETS	28,502		28,502		26,422
Operating Segments | SoCalGas
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	1,313	1,385	6,574	4,879
DEPRECIATION AND AMORTIZATION	211	190	625	565
INTEREST INCOME	2	3	7	4
INTEREST EXPENSE	70	50	210	135
INCOME TAX (BENEFIT) EXPENSE	(5)	(28)	68	75
EARNINGS (LOSSES) ATTRIBUTABLE TO COMMON SHARES	16	(82)	531	339
Segment Reporting Information, Additional Information [Abstract]
EXPENDITURES FOR PROPERTY, PLANT & EQUIPMENT			1,451	1,394
ASSETS	23,069		23,069		22,346
Operating Segments | Sempra Texas Utilities
Segment Reporting Information, Profit (Loss) [Abstract]
INCOME TAX (BENEFIT) EXPENSE	0	1	0	1
Equity earnings, before income tax:	2	1	5	6
Equity earnings, net of income tax:	305	257	548	603
EARNINGS (LOSSES) ATTRIBUTABLE TO COMMON SHARES	305	256	548	604
Segment Reporting Information, Additional Information [Abstract]
ASSETS	14,269		14,269		13,781
EQUITY METHOD INVESTMENTS	14,260		14,260		13,772
Operating Segments | Sempra Infrastructure
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	629	697	2,485	1,810
DEPRECIATION AND AMORTIZATION	71	67	210	199
INTEREST INCOME	4	7	25	37
INTEREST EXPENSE	7	39	127	98
INCOME TAX (BENEFIT) EXPENSE	24	58	555	219
Equity earnings, before income tax:	131	133	413	430
Equity earnings, net of income tax:	41	26	120	79
EARNINGS (LOSSES) ATTRIBUTABLE TO COMMON SHARES	223	114	746	392
Segment Reporting Information, Additional Information [Abstract]
EXPENDITURES FOR PROPERTY, PLANT & EQUIPMENT			2,725	489
ASSETS	19,722		19,722		15,760
EQUITY METHOD INVESTMENTS	2,096		2,096		1,905
All other
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	0	1	0	1
DEPRECIATION AND AMORTIZATION	1	2	6	6
INTEREST INCOME	7	6	17	14
INTEREST EXPENSE	109	81	292	232
INCOME TAX (BENEFIT) EXPENSE	(56)	(45)	(120)	(1)
EARNINGS (LOSSES) ATTRIBUTABLE TO COMMON SHARES	(97)	(74)	(248)	(360)
Segment Reporting Information, Additional Information [Abstract]
EXPENDITURES FOR PROPERTY, PLANT & EQUIPMENT			5	6
ASSETS	1,205		1,205		1,376
Adjustments and eliminations
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	0	0	(1)	0
Intersegment revenues and eliminations
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	(50)	(35)	(186)	(119)
INTEREST INCOME	(1)	0	(1)	0
INTEREST EXPENSE	0	(1)	(1)	(2)
Segment Reporting Information, Additional Information [Abstract]
ASSETS	(1,032)		(1,032)		$ (1,111)
Intersegment revenues and eliminations | SDG&E
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	(5)	(4)	(14)	(11)
Intersegment revenues and eliminations | SoCalGas
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	(29)	(24)	(91)	(73)
Intersegment revenues and eliminations | Sempra Infrastructure
Segment Reporting Information, Profit (Loss) [Abstract]
REVENUES	$ (16)	$ (7)	$ (81)	$ (35)

[1] Derived from audited financial statements.