DEBT AND CREDIT FACILITIES - COMMITTED LINES OF CREDIT (Details) $ in Millions	Dec. 31, 2023 USD ($)
Debt Instrument [Line Items]
Total facility	$ 9,900
Available unused credit	7,591
Letters of credit outstanding
Debt Instrument [Line Items]
Line of credit outstanding	(25)
Commercial paper outstanding
Debt Instrument [Line Items]
Line of credit outstanding	(1,313)
Amounts outstanding
Debt Instrument [Line Items]
Line of credit outstanding	(971)
Sempra
Debt Instrument [Line Items]
Total facility	4,000
Available unused credit	3,634
Sempra | Letters of credit outstanding
Debt Instrument [Line Items]
Line of credit outstanding	0
Sempra | Commercial paper outstanding
Debt Instrument [Line Items]
Line of credit outstanding	(366)
Sempra | Amounts outstanding
Debt Instrument [Line Items]
Line of credit outstanding	0
SDG&E
Debt Instrument [Line Items]
Total facility	1,500
Available unused credit	1,500
SDG&E | Letters of credit outstanding
Debt Instrument [Line Items]
Line of credit outstanding	0
SDG&E | Commercial paper outstanding
Debt Instrument [Line Items]
Line of credit outstanding	0
SDG&E | Amounts outstanding
Debt Instrument [Line Items]
Line of credit outstanding	0
SoCalGas
Debt Instrument [Line Items]
Total facility	1,200
Available unused credit	253
SoCalGas | Letters of credit outstanding
Debt Instrument [Line Items]
Line of credit outstanding	0
SoCalGas | Commercial paper outstanding
Debt Instrument [Line Items]
Line of credit outstanding	(947)
SoCalGas | Amounts outstanding
Debt Instrument [Line Items]
Line of credit outstanding	0
SI Partners and IEnova | IEnova And SI Partners Committed Line Of Credit Due September 2025
Debt Instrument [Line Items]
Total facility	500
Available unused credit	75
SI Partners and IEnova | IEnova And SI Partners Committed Line Of Credit Due September 2025 | Letters of credit outstanding
Debt Instrument [Line Items]
Line of credit outstanding	0
SI Partners and IEnova | IEnova Committed Line Of Credit Due August 2026
Debt Instrument [Line Items]
Total facility	1,000
Available unused credit	1,000
SI Partners and IEnova | IEnova Committed Line Of Credit Due August 2026 | Letters of credit outstanding
Debt Instrument [Line Items]
Line of credit outstanding	0
SI Partners and IEnova | IEnova Committed Line Of Credit Due August 2028
Debt Instrument [Line Items]
Total facility	1,500
Available unused credit	954
SI Partners and IEnova | IEnova Committed Line Of Credit Due August 2028 | Letters of credit outstanding
Debt Instrument [Line Items]
Line of credit outstanding	0
SI Partners and IEnova | Commercial paper outstanding | IEnova And SI Partners Committed Line Of Credit Due September 2025
Debt Instrument [Line Items]
Line of credit outstanding	0
SI Partners and IEnova | Commercial paper outstanding | IEnova Committed Line Of Credit Due August 2026
Debt Instrument [Line Items]
Line of credit outstanding	0
SI Partners and IEnova | Commercial paper outstanding | IEnova Committed Line Of Credit Due August 2028
Debt Instrument [Line Items]
Line of credit outstanding	0
SI Partners and IEnova | Amounts outstanding | IEnova And SI Partners Committed Line Of Credit Due September 2025
Debt Instrument [Line Items]
Line of credit outstanding	(425)
SI Partners and IEnova | Amounts outstanding | IEnova Committed Line Of Credit Due August 2026
Debt Instrument [Line Items]
Line of credit outstanding	0
SI Partners and IEnova | Amounts outstanding | IEnova Committed Line Of Credit Due August 2028
Debt Instrument [Line Items]
Line of credit outstanding	(546)
Port Arthur LNG | Port Arthur LNG Committed Line Of Credit Due March 2030
Debt Instrument [Line Items]
Total facility	200
Available unused credit	175
Port Arthur LNG | Port Arthur LNG Committed Line Of Credit Due March 2030 | Letters of credit outstanding
Debt Instrument [Line Items]
Line of credit outstanding	(25)
Port Arthur LNG | Commercial paper outstanding | Port Arthur LNG Committed Line Of Credit Due March 2030
Debt Instrument [Line Items]
Line of credit outstanding	0
Port Arthur LNG | Amounts outstanding | Port Arthur LNG Committed Line Of Credit Due March 2030
Debt Instrument [Line Items]
Line of credit outstanding	$ 0