DEBT AND CREDIT FACILITIES - COMMITTED LINES OF CREDIT NARRATIVE (Details)	1 Months Ended	12 Months Ended
	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($) lender lineOfCredit line_of_credit
Line of Credit Facility [Line Items]
Total facility		$ 9,900,000,000
Primary committed lines of credit | lineOfCredit		7
Number of lenders | lender		23
Lenders, percent of facility		6.00%
Line of credit, increase limit		$ 500,000,000
Maximum ratio of indebtedness to total capitalization (as a percent)		65.00%
Sempra
Line of Credit Facility [Line Items]
Total facility		$ 4,000,000,000
SDG&E
Line of Credit Facility [Line Items]
Total facility		1,500,000,000
Committed lines of credit, capacity for issuance of letters of credit		100,000,000
Line of credit, increase limit		250,000,000
SoCalGas
Line of Credit Facility [Line Items]
Total facility		1,200,000,000
Committed lines of credit, capacity for issuance of letters of credit		150,000,000
Line of credit, increase limit		$ 250,000,000
SI Partners and IEnova
Line of Credit Facility [Line Items]
Number of lines of credit | line_of_credit		3
SI Partners and IEnova | IEnova And SI Partners Committed Line Of Credit Due September 2025
Line of Credit Facility [Line Items]
Total facility		$ 500,000,000
SI Partners and IEnova | IEnova And SI Partners Committed Line Of Credit Due September 2025 | Secured Overnight Financing Rate (SOFR)
Line of Credit Facility [Line Items]
Variable percentage rate		0.80%
SI Partners and IEnova | IEnova And SI Partners Committed Line Of Credit Due August 2026 [Member]
Line of Credit Facility [Line Items]
Total facility		$ 1,000,000,000
SI Partners and IEnova | IEnova And SI Partners Committed Line Of Credit Due August 2026 [Member] | Secured Overnight Financing Rate (SOFR)
Line of Credit Facility [Line Items]
Variable percentage rate		0.10%
SI Partners and IEnova | IEnova And SI Partners Committed Line Of Credit Due August 2028
Line of Credit Facility [Line Items]
Total facility		$ 1,500,000,000
SI Partners and IEnova | IEnova And SI Partners Committed Line Of Credit Due August 2028 | Secured Overnight Financing Rate (SOFR)
Line of Credit Facility [Line Items]
Variable percentage rate		0.90%
Port Arthur LNG | Port Arthur LNG Committed Line Of Credit Due March 2030
Line of Credit Facility [Line Items]
Total facility		$ 200,000,000
Port Arthur LNG | Port Arthur LNG Committed Line Of Credit Due March 2030 | Line of Credit
Line of Credit Facility [Line Items]
Total facility	$ 200,000,000
Term of contract (in years)	7 years	7 years
Sempra Energy
Line of Credit Facility [Line Items]
Committed lines of credit, capacity for issuance of letters of credit		$ 200,000,000
Line of credit, increase limit		500,000,000
SI Partners
Line of Credit Facility [Line Items]
Committed lines of credit, capacity for issuance of letters of credit		$ 200,000,000
Maximum adjustment EBITDA allowed		5.25
SI Partners | Swingline Sub-Limit
Line of Credit Facility [Line Items]
Line of credit outstanding		$ 100,000,000
SI Partners | IEnova And SI Partners Committed Line Of Credit Due August 2026 [Member]
Line of Credit Facility [Line Items]
Total facility		$ 1,000,000,000
Number of lenders | lender		12
SI Partners | IEnova And SI Partners Committed Line Of Credit Due August 2028
Line of Credit Facility [Line Items]
Number of lenders | lender		12
IEnova | IEnova And SI Partners Committed Line Of Credit Due August 2026 [Member]
Line of Credit Facility [Line Items]
Total facility		$ 910,000,000
Number of lenders | lender		11
IEnova | IEnova And SI Partners Committed Line Of Credit Due August 2028
Line of Credit Facility [Line Items]
Total facility		$ 1,365,000,000
Number of lenders | lender		11