DEBT AND CREDIT FACILITIES - LINES OF CREDIT (Details)	1 Months Ended	9 Months Ended
	Oct. 31, 2022 USD ($) lender	Sep. 30, 2022 USD ($) customer	Mar. 31, 2022 USD ($)	Feb. 28, 2022 USD ($)
Line of Credit [Line Items]
Maximum borrowing capacity		$ 9,535,000,000
Primary committed lines of credit | customer		7
Amount outstanding		$ (295,000,000)
Available unused credit		8,652,000,000
Uncommitted letters of credit outstanding		623,000,000
Line of Credit | Credit Facility Expiring October 2027 | Subsequent Event
Line of Credit [Line Items]
Number of lenders | lender	23
Lenders, percent of facility	6.00%
Commercial Paper
Line of Credit [Line Items]
Commercial paper outstanding		(588,000,000)
Letter of Credit
Line of Credit [Line Items]
Uncommitted letters of credit outstanding		623,000,000
Sempra Energy | Subsequent Event
Line of Credit [Line Items]
Maximum borrowing capacity	$ 3,190,000,000
Sempra Energy | Sempra Energy Line of Credit Facility 1 Due May 2024
Line of Credit [Line Items]
Maximum borrowing capacity		3,185,000,000
Amount outstanding		0
Available unused credit		3,024,000,000
Sempra Energy | Sempra Energy Line Of Credit Facility 2 Due May 2024
Line of Credit [Line Items]
Maximum borrowing capacity		1,250,000,000
Amount outstanding		0
Available unused credit		1,250,000,000
Sempra Energy | Sempra Energy Line Of Credit Facility 2 Due May 2024 | Subsequent Event
Line of Credit [Line Items]
Maximum borrowing capacity	1,250,000,000
Sempra Energy | Line of Credit | Credit Facility Expiring October 2027 | Subsequent Event
Line of Credit [Line Items]
Maximum borrowing capacity	$ 4,000,000,000
Term of debt instrument	5 years
Committed lines of credit, capacity for issuance of letters of credit	$ 200,000,000
Line of credit, increase limit	$ 500,000,000
Maximum ratio of indebtedness to total capitalization (as a percent)	65.00%
Sempra Energy | Commercial Paper | Sempra Energy Line of Credit Facility 1 Due May 2024
Line of Credit [Line Items]
Commercial paper outstanding		(161,000,000)
Sempra Energy | Commercial Paper | Sempra Energy Line Of Credit Facility 2 Due May 2024
Line of Credit [Line Items]
Commercial paper outstanding		0
San Diego Gas and Electric Company
Line of Credit [Line Items]
Maximum borrowing capacity		1,500,000,000
Amount outstanding		0
Available unused credit		1,500,000,000
San Diego Gas and Electric Company | Subsequent Event
Line of Credit [Line Items]
Maximum borrowing capacity	$ 1,500,000,000
San Diego Gas and Electric Company | Line of Credit | Credit Facility Expiring October 2027 | Subsequent Event
Line of Credit [Line Items]
Maximum borrowing capacity	$ 1,500,000,000
Term of debt instrument	5 years
Committed lines of credit, capacity for issuance of letters of credit	$ 100,000,000
Line of credit, increase limit	$ 250,000,000
Maximum ratio of indebtedness to total capitalization (as a percent)	65.00%
San Diego Gas and Electric Company | Commercial Paper
Line of Credit [Line Items]
Commercial paper outstanding		0
San Diego Gas and Electric Company | Letter of Credit
Line of Credit [Line Items]
Uncommitted letters of credit outstanding		15,000,000
Southern California Gas Company
Line of Credit [Line Items]
Maximum borrowing capacity		750,000,000
Amount outstanding		0
Available unused credit		323,000,000
Southern California Gas Company | Subsequent Event
Line of Credit [Line Items]
Maximum borrowing capacity	$ 750,000,000
Southern California Gas Company | Line of Credit | Credit Facility Expiring October 2027 | Subsequent Event
Line of Credit [Line Items]
Maximum borrowing capacity	$ 1,200,000,000
Term of debt instrument	5 years
Committed lines of credit, capacity for issuance of letters of credit	$ 150,000,000
Line of credit, increase limit	$ 250,000,000
Maximum ratio of indebtedness to total capitalization (as a percent)	65.00%
Southern California Gas Company | Commercial Paper
Line of Credit [Line Items]
Commercial paper outstanding		(427,000,000)
Southern California Gas Company | Letter of Credit
Line of Credit [Line Items]
Uncommitted letters of credit outstanding		20,000,000
SI Partners
Line of Credit [Line Items]
Maximum borrowing capacity		1,000,000,000
Amount outstanding		0
Available unused credit		$ 1,000,000,000
Debt covenant, ratio of adjusted net indebtedness to earnings		5.25
SI Partners | Commercial Paper
Line of Credit [Line Items]
Commercial paper outstanding		$ 0
IEnova | IEnova Committed Line Of Credit Due 2023
Line of Credit [Line Items]
Maximum borrowing capacity		350,000,000
Amount outstanding		(295,000,000)
Available unused credit		55,000,000
IEnova | IEnova Committed Line Of Credit Due 2024
Line of Credit [Line Items]
Maximum borrowing capacity		1,500,000,000
Amount outstanding		0
Available unused credit		1,500,000,000
IEnova | Commercial Paper | IEnova Committed Line Of Credit Due 2023
Line of Credit [Line Items]
Commercial paper outstanding		0
IEnova | Commercial Paper | IEnova Committed Line Of Credit Due 2024
Line of Credit [Line Items]
Commercial paper outstanding		0
Sempra Infrastructure | Foreign Unsecured Line of Credit
Line of Credit [Line Items]
Maximum borrowing capacity		320,000,000
Amount outstanding		(67,000,000)
Available unused credit		253,000,000
Sempra Infrastructure | Foreign Line of Credit | Foreign Uncommitted Revolving Credit Facility Due October 2023
Line of Credit [Line Items]
Maximum borrowing capacity		100,000,000
Amount outstanding		(50,000,000)
Available unused credit		50,000,000
Sempra Infrastructure | Foreign Line of Credit | Foreign Uncommitted Revolving Credit Facility Due October 2023-2
Line of Credit [Line Items]
Maximum borrowing capacity		20,000,000
Amount outstanding		0
Available unused credit		20,000,000
Sempra Infrastructure | Letter of Credit
Line of Credit [Line Items]
Uncommitted letters of credit outstanding		402,000,000
Sempra LNG | Foreign Line of Credit | Foreign Uncommitted Revolving Credit Facility Due August 2023
Line of Credit [Line Items]
Maximum borrowing capacity		200,000,000	$ 200,000,000	$ 100,000,000
Amount outstanding		(17,000,000)
Available unused credit		183,000,000
Parent and Other | Letter of Credit
Line of Credit [Line Items]
Uncommitted letters of credit outstanding		$ 186,000,000