DEBT AND CREDIT FACILITIES - COMMITTED LINES OF CREDIT (Details) $ in Millions	1 Months Ended	3 Months Ended
	Mar. 31, 2023 USD ($) lender	Mar. 31, 2023 USD ($) lineOfCredit
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 9,900	$ 9,900
Primary committed lines of credit | lineOfCredit		8
Line of credit outstanding	(1,284)	$ (1,284)
Available unused credit	7,686	7,686
Commercial paper
Line of Credit Facility [Line Items]
Line of credit outstanding	(930)	(930)
Sempra Energy
Line of Credit Facility [Line Items]
Maximum borrowing capacity	4,000	4,000
Line of credit outstanding	0	0
Available unused credit	3,293	3,293
Sempra Energy | Commercial paper
Line of Credit Facility [Line Items]
Line of credit outstanding	(707)	(707)
San Diego Gas and Electric Company
Line of Credit Facility [Line Items]
Maximum borrowing capacity	1,500	1,500
Line of credit outstanding	0	0
Available unused credit	1,500	1,500
San Diego Gas and Electric Company | Commercial paper
Line of Credit Facility [Line Items]
Line of credit outstanding	0	0
Southern California Gas Company
Line of Credit Facility [Line Items]
Maximum borrowing capacity	1,200	1,200
Line of credit outstanding	0	0
Available unused credit	977	977
Southern California Gas Company | Commercial paper
Line of Credit Facility [Line Items]
Line of credit outstanding	(223)	(223)
SI Partners
Line of Credit Facility [Line Items]
Maximum borrowing capacity	1,000	1,000
Line of credit outstanding	0	0
Available unused credit	$ 1,000	$ 1,000
Maximum adjustment EBITDA allowed	5.25	5.25
SI Partners | Commercial paper
Line of Credit Facility [Line Items]
Line of credit outstanding	$ 0	$ 0
IEnova And SI Partners | IEnova Committed Line Of Credit Due September 2023
Line of Credit Facility [Line Items]
Maximum borrowing capacity	350	350
Line of credit outstanding	(350)	(350)
Available unused credit	0	0
IEnova And SI Partners | IEnova Committed Line Of Credit Due December 2023
Line of Credit Facility [Line Items]
Maximum borrowing capacity	150	150
Line of credit outstanding	(8)	(8)
Available unused credit	142	142
IEnova And SI Partners | IEnova Committed Line Of Credit Due 2024
Line of Credit Facility [Line Items]
Maximum borrowing capacity	1,500	1,500
Line of credit outstanding	(926)	(926)
Available unused credit	574	574
IEnova And SI Partners | Commercial paper | IEnova Committed Line Of Credit Due September 2023
Line of Credit Facility [Line Items]
Line of credit outstanding	0	0
IEnova And SI Partners | Commercial paper | IEnova Committed Line Of Credit Due December 2023
Line of Credit Facility [Line Items]
Line of credit outstanding	0	0
IEnova And SI Partners | Commercial paper | IEnova Committed Line Of Credit Due 2024
Line of Credit Facility [Line Items]
Line of credit outstanding	0	0
Port Arthur LNG | Port Arthur LNG Committed Line Of Credit Due 2030
Line of Credit Facility [Line Items]
Maximum borrowing capacity	200	200
Line of credit outstanding	0	0
Available unused credit	200	200
Port Arthur LNG | Commercial paper | Port Arthur LNG Committed Line Of Credit Due 2030
Line of Credit Facility [Line Items]
Line of credit outstanding	0	0
Port Arthur LNG | Line of Credit | Port Arthur LNG Committed Line Of Credit Due 2030
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 200	$ 200
Term of debt instrument	7 years
Number of lenders | lender	4
Sempra U.S.
Line of Credit Facility [Line Items]
Maximum ratio of indebtedness to total capitalization (as a percent)	65.00%	65.00%