COMMITMENTS AND CONTINGENCIES - LEGAL PROCEEDINGS (Details)		1 Months Ended	3 Months Ended		9 Months Ended
	Oct. 31, 2022 USD ($) numberOfPlaintiffs	Sep. 30, 2021 USD ($) plaintiff lawsuit	Sep. 30, 2022 USD ($) lawsuit	Sep. 30, 2021 USD ($) lawsuit	Sep. 30, 2022 USD ($) lawsuit	Sep. 30, 2021 USD ($) lawsuit	Jan. 31, 2021 lawsuit
Loss Contingencies [Line Items]
Liability for legal proceedings			$ 245,000,000		$ 245,000,000
Aliso Canyon litigation and regulatory matters			122,000,000	$ 1,571,000,000	259,000,000	$ 1,571,000,000
Aliso Canyon Natural Gas Storage Facility Gas Leak
Loss Contingencies [Line Items]
Liability for legal proceedings			145,000,000		145,000,000
Southern California Gas Company
Loss Contingencies [Line Items]
Liability for legal proceedings			171,000,000		171,000,000
Insurance settlements receivable			1,279,000,000		1,279,000,000
Aliso Canyon litigation and regulatory matters			122,000,000	$ 1,571,000,000	259,000,000	$ 1,571,000,000
Insurance proceeds					1,269,000,000
Southern California Gas Company | Aliso Canyon Natural Gas Storage Facility Gas Leak
Loss Contingencies [Line Items]
Liability for legal proceedings			145,000,000		145,000,000
Number of lawsuits | lawsuit		390		390		390
Number of plaintiffs | plaintiff		36,000
Estimate of costs			3,485,000,000		3,485,000,000
Net book value of Aliso Canyon facility			923,000,000		923,000,000
Insurance settlements receivable			10,000,000		10,000,000
Reserve for Aliso Canyon costs			145,000,000		145,000,000
Aliso Canyon litigation and regulatory matters			122,000,000		259,000,000	$ 1,570,000,000
Aliso Canyon litigation and regulatory matters, net of tax			$ 101,000,000		$ 199,000,000	1,130,000,000
Southern California Gas Company | Shareholder Derivative Complaint
Loss Contingencies [Line Items]
Number of lawsuits | lawsuit			4		4		3
Southern California Gas Company | Individual Plaintiff Litigation | Aliso Canyon Natural Gas Storage Facility Gas Leak
Loss Contingencies [Line Items]
Estimate of costs		$ 1,800,000,000		$ 1,800,000,000		1,800,000,000
Southern California Gas Company | Property Class Action | Aliso Canyon Natural Gas Storage Facility Gas Leak
Loss Contingencies [Line Items]
Estimate of costs		$ 40,000,000		$ 40,000,000		$ 40,000,000
Sempra Infrastructure | Guaymas-El Oro Segment, Sonora Pipeline
Loss Contingencies [Line Items]
Net book value of pipeline			$ 423,000,000		$ 423,000,000
Sempra Infrastructure | Regulatory Actions by the Mexican Government
Loss Contingencies [Line Items]
Number of solar facilities affected			2		2
Other intangible assets, net			$ 13,000,000		$ 13,000,000
Subsequent Event | Southern California Gas Company | Individual Plaintiff Litigation | Aliso Canyon Natural Gas Storage Facility Gas Leak
Loss Contingencies [Line Items]
Percentage of plaintiffs not located or failed to respond	86.00%
Percentage of plaintiffs agreeing to participate and submit releases	99.00%
Payment for loss	$ 1,790,000,000
Number of plaintiffs not contacted | numberOfPlaintiffs	345
Deferred Credits and Other | Southern California Gas Company | Aliso Canyon Natural Gas Storage Facility Gas Leak
Loss Contingencies [Line Items]
Reserve for Aliso Canyon costs			$ 4,000,000		$ 4,000,000