DEBT AND CREDIT FACILITIES - COMMITTED LINES OF CREDIT (Details)	Dec. 31, 2024 USD ($)
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 9,900,000,000
Available unused credit	8,528,000,000
Letters of Credit
Debt Instrument [Line Items]
Line of credit outstanding	(64,000,000)
Commercial Paper
Debt Instrument [Line Items]
Line of credit outstanding	(754,000,000)
Amounts Outstanding
Debt Instrument [Line Items]
Line of credit outstanding	(554,000,000)
Sempra
Debt Instrument [Line Items]
Maximum borrowing capacity	4,000,000,000
Available unused credit	4,000,000,000
Sempra | Letters of Credit
Debt Instrument [Line Items]
Line of credit outstanding	0
Sempra | Commercial Paper
Debt Instrument [Line Items]
Line of credit outstanding	0
Sempra | Amounts Outstanding
Debt Instrument [Line Items]
Line of credit outstanding	0
SDG&E
Debt Instrument [Line Items]
Maximum borrowing capacity	1,500,000,000
Available unused credit	1,083,000,000
SDG&E | Letters of Credit
Debt Instrument [Line Items]
Line of credit outstanding	0
SDG&E | Commercial Paper
Debt Instrument [Line Items]
Line of credit outstanding	(417,000,000)
SDG&E | Amounts Outstanding
Debt Instrument [Line Items]
Line of credit outstanding	0
SoCalGas
Debt Instrument [Line Items]
Maximum borrowing capacity	1,200,000,000
Available unused credit	863,000,000
SoCalGas | Letters of Credit
Debt Instrument [Line Items]
Line of credit outstanding	0
SoCalGas | Commercial Paper
Debt Instrument [Line Items]
Line of credit outstanding	(337,000,000)
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]
Maximum borrowing capacity	500,000,000
Available unused credit	132,000,000
SI Partners and IEnova | IEnova And SI Partners Committed Line Of Credit Due September 2025 | Letters of Credit
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]
Maximum borrowing capacity	1,000,000,000
Available unused credit	1,000,000,000
SI Partners and IEnova | IEnova Committed Line Of Credit Due August 2026 | Letters of Credit
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]
Maximum borrowing capacity	1,500,000,000
Available unused credit	1,314,000,000
SI Partners and IEnova | IEnova Committed Line Of Credit Due August 2028 | Letters of Credit
Debt Instrument [Line Items]
Line of credit outstanding	0
SI Partners and IEnova | Commercial Paper | 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 | IEnova Committed Line Of Credit Due August 2026
Debt Instrument [Line Items]
Line of credit outstanding	0
SI Partners and IEnova | Commercial Paper | 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	(368,000,000)
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	(186,000,000)
Port Arthur LNG | Port Arthur LNG Committed Line Of Credit Due March 2030
Debt Instrument [Line Items]
Maximum borrowing capacity	200,000,000
Available unused credit	136,000,000
Port Arthur LNG | Port Arthur LNG Committed Line Of Credit Due March 2030 | Letters of Credit
Debt Instrument [Line Items]
Line of credit outstanding	(64,000,000)
Port Arthur LNG | Commercial Paper | 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