SEMPRA - EQUITY AND EARNINGS PER COMMON SHARE - NONCONTROLLING INTERESTS NARATIVE (Details) $ / shares in Units, $ / shares in Units, $ in Millions, $ in Billions			1 Months Ended							12 Months Ended
	Jun. 01, 2022 USD ($)	Oct. 01, 2021 USD ($)	Sep. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Oct. 31, 2021 USD ($)	Sep. 30, 2021 USD ($) $ / shares shares	Sep. 30, 2021 MXN ($) $ / shares shares	Jul. 31, 2021 USD ($)	May 31, 2021 USD ($) shares	Dec. 31, 2023 USD ($) shares	Dec. 31, 2022 USD ($) shares	Dec. 31, 2021 USD ($) shares	Feb. 20, 2024 shares	Dec. 21, 2021 USD ($)	Oct. 15, 2021 $ / shares	Aug. 31, 2021	Apr. 30, 2021
Noncontrolling Interest [Line Items]
Increase in the noncontrolling interest balance from the sale of noncontrolling interest										$ 1,234	$ 1,419	$ 2,712
Payments to noncontrolling interests										0	0	224
Contributions										$ 1,625	$ 31	$ 4
Shares issued in IEnova exchange offer | shares									24,613,554	0	0	24,613,554
Net income, income tax expense (benefit), attributable to parent										$ 490	$ 556	$ 99
IEnova
Noncontrolling Interest [Line Items]
Common stock acquired (in shares) | shares						51,014,545	51,014,545		381,015,194
Common stock exchange ratio									0.0646
Increase in shareholders' equity						$ 72
Common stock acquired						$ 202	$ 4.0
Share price (in dollars per share) | (per share)						$ 3.95	$ 78.97
ICM Ventures Holdings B.V. | Sempra Infrastructure
Noncontrolling Interest [Line Items]
Ownership percentage held by noncontrolling owners								17.50%
Payments to acquire minority interest								$ 7
IEnova
Noncontrolling Interest [Line Items]
Ownership interest (as a percent)									96.40%	99.90%						96.40%	70.20%
Decrease in equity held by NCI						$ 188			$ 1,400
Increase in shareholders' equity						17			1,400
Purchase of noncontrolling interest, transaction costs						$ 4			$ 12
Share price (in pesos per share) | $ / shares															$ 78.97
Noncontrolling interest, remaining shares of noncontrolling interest | shares										1,212,981
IEnova | Subsequent Event
Noncontrolling Interest [Line Items]
Noncontrolling interest, remaining shares of noncontrolling interest | shares													894,092
SI Partners | Abu Dhabi Investment Authority
Noncontrolling Interest [Line Items]
Sale of noncontrolling interest (as a percent)														10.00%
Sale of noncontrolling interest, purchase price														$ 1,700
SI Partners | KKR
Noncontrolling Interest [Line Items]
Sale of noncontrolling interest (as a percent)					20.00%
Net income, income tax expense (benefit), attributable to parent					$ 72
SI Partners | Sempra Infrastructure
Noncontrolling Interest [Line Items]
Sale of noncontrolling interest, purchase price		$ 3,400
Increase in the noncontrolling interest balance from the sale of noncontrolling interest	$ 709	1,300
Sale of noncontrolling interest, change in equity	710	1,400
Sale of noncontrolling interest, transaction costs	12	173
Sale of noncontrolling interest, deferred income tax liability	300	490
Sale of noncontrolling interest, transaction costs reimbursed	$ 10	$ 149
Ownership percentage held by noncontrolling owners		20.00%
Ownership interest (as a percent)										70.00%
Port Arthur LNG | SI Partners | KKR Denali
Noncontrolling Interest [Line Items]
Ownership percentage held by noncontrolling owners			42.00%
Port Arthur LNG | Indirect Subsidiary Of SI Partners
Noncontrolling Interest [Line Items]
Ownership percentage held by noncontrolling owners				30.00%
Noncontrolling interest, funding commitment, percentage				110.00%
Noncontrolling interest, guaranteed funding commitment, percentage				70.00%
SI Partners Subsidiary | Indirect Subsidiary Of SI Partners | KKR Denali
Noncontrolling Interest [Line Items]
Ownership percentage held by noncontrolling owners			60.00%
Port Arthur LNG
Noncontrolling Interest [Line Items]
Contributions				$ 234
Port Arthur LNG | KKR Denali
Noncontrolling Interest [Line Items]
Increase in the noncontrolling interest balance from the sale of noncontrolling interest			$ 61
Contributions			1,000
Noncontrolling interest, increase from sale of parent equity interest, net of transaction costs			11
Noncontrolling interest, increase from sale of parent equity interest, tax expense (benefit)			(23)
Port Arthur LNG | SI Partners | KKR Denali
Noncontrolling Interest [Line Items]
Sale of noncontrolling interest, cash consideration, minimum interest transferred			$ 976
Port Arthur LNG | Indirect Subsidiary Of SI Partners
Noncontrolling Interest [Line Items]
Increase in the noncontrolling interest balance from the sale of noncontrolling interest				12
Noncontrolling interest, funding commitment				9,000
Noncontrolling interest, increase from sale of parent equity interest, net of transaction costs				3
Noncontrolling interest, increase from sale of parent equity interest, tax expense (benefit)				5
Proceeds from divestiture of interest in joint venture				$ 254
SI Partners
Noncontrolling Interest [Line Items]
Increase in the noncontrolling interest balance from the sale of noncontrolling interest										$ 200
Sale of noncontrolling interest, change in equity										145
SI Partners | KKR
Noncontrolling Interest [Line Items]
Noncontrolling interest, funding commitment		$ 200
Payments to noncontrolling interests										$ 200