GENERAL INFORMATION AND OTHER FINANCIAL DATA - SHAREHOLDER'S EQUITY AND NONCONTROLLING INTEREST (Details) $ / shares in Units, $ / shares in Units, $ in Millions, $ in Billions				1 Months Ended				3 Months Ended	9 Months Ended
	Jun. 01, 2022 USD ($)	Apr. 06, 2022 USD ($) $ / shares shares	Jan. 11, 2022 USD ($) $ / shares shares	Sep. 30, 2021 USD ($) $ / shares shares	Sep. 30, 2021 MXN ($) $ / shares shares	Jul. 31, 2021 USD ($)	May 31, 2021 USD ($) shares	Sep. 30, 2022 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Oct. 31, 2022 shares	Dec. 21, 2021 USD ($)	Oct. 15, 2021 $ / shares shares	Aug. 31, 2021	Jul. 15, 2021 shares	Apr. 30, 2021	Jan. 15, 2021 shares
Subsidiary, Sale of Stock [Line Items]
Sale								$ 1	$ 1,419	$ 5
Shares issued (in shares) | shares							12,306,777
Contributions from noncontrolling interests									$ 15	$ 0
Series A Preferred Stock
Subsidiary, Sale of Stock [Line Items]
Shares converted | shares																	17,250,000
Preferred stock, conversion ratio																	0.7989
Common stock
Subsidiary, Sale of Stock [Line Items]
Shares converted | shares																	13,781,025
Accelerated share repurchase program, prepaid amount		$ 250	$ 200
Share repurchase program, number of shares repurchased (in shares) | shares		1,471,957	1,472,756
Common stock repurchased, average price (in dollars per share) | $ / shares		$ 169.84	$ 135.80
Series B Preferred Stock
Subsidiary, Sale of Stock [Line Items]
Shares converted | shares															5,750,000
Convertible Preferred Stock Series B
Subsidiary, Sale of Stock [Line Items]
Shares converted | shares															4,256,720
Preferred stock, conversion ratio															0.7403
Infraestructura Energética Nova
Subsidiary, Sale of Stock [Line Items]
Common stock acquired (in shares) | shares				51,014,545	51,014,545		381,015,194
Common stock exchange ratio							0.0323
Increase in stockholders' equity				$ 84
Value of shares acquired				$ 202	$ 4.0
Shares repurchased, share price (in dollars per share) | (per share)				$ 3.95	$ 78.97
SI Partners | Sempra Infrastructure
Subsidiary, Sale of Stock [Line Items]
Sale	$ 709
Sale of noncontrolling interest, change in equity	710
Sale of noncontrolling interest, transaction costs	12
Sale of noncontrolling interest, deferred income tax liability	300
Sale of noncontrolling interest, transaction costs reimbursed	$ 10
SI Partners | Abu Dhabi Investment Authority
Subsidiary, Sale of Stock [Line Items]
Sale of noncontrolling interest (as a percent)												10.00%
Sale of noncontrolling interest, aggregate purchase price												$ 1,700
SI Partners | Sempra Energy
Subsidiary, Sale of Stock [Line Items]
Ownership percentage												70.00%
SI Partners | KKR
Subsidiary, Sale of Stock [Line Items]
Ownership percentage												20.00%
SI Partners | Abu Dhabi Investment Authority
Subsidiary, Sale of Stock [Line Items]
Ownership percentage												10.00%
IEnova
Subsidiary, Sale of Stock [Line Items]
Ownership interest (as a percent)	99.90%			99.90%	99.90%		96.40%			99.90%				96.40%		70.20%
Decrease in equity				$ 188			$ 1,400
Increase in stockholders' equity							1,400
Transaction costs				1			$ 12
Contributions from noncontrolling interests				$ 14
Amount held in trust for purchasing shares (in shares) | shares													1,212,981
Share price (in pesos per share) | $ / shares													$ 78.97
IEnova | Subsequent Event
Subsidiary, Sale of Stock [Line Items]
Amount held in trust for purchasing shares (in shares) | shares											861,439
Infraestructura Energética Nova | KKR
Subsidiary, Sale of Stock [Line Items]
Noncontrolling interest, percent of funding	20.00%
Infraestructura Energética Nova | Abu Dhabi Investment Authority
Subsidiary, Sale of Stock [Line Items]
Noncontrolling interest, percent of funding	10.00%
ICM Ventures Holdings B.V. [Member] | Sempra Infrastructure
Subsidiary, Sale of Stock [Line Items]
Ownership percentage						17.50%
Payment to acquire remaining interest						$ 7