DEBT AND CREDIT FACILITIES - COMMITTED LINES OF CREDIT (Details) $ in Millions	Sep. 30, 2024 USD ($)
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 9,900
Available unused credit	8,161
Committed Letters of Credit Outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	(64)
Commercial paper outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	(734)
Amounts outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	(941)
Sempra
Line of Credit Facility [Line Items]
Maximum borrowing capacity	4,000
Available unused credit	3,650
Sempra | Committed Letters of Credit Outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	0
Sempra | Commercial paper outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	(350)
Sempra | Amounts outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	0
SDG&E
Line of Credit Facility [Line Items]
Maximum borrowing capacity	1,500
Available unused credit	1,116
SDG&E | Committed Letters of Credit Outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	0
SDG&E | Commercial paper outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	(384)
SDG&E | Amounts outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	0
SoCalGas
Line of Credit Facility [Line Items]
Maximum borrowing capacity	1,200
Available unused credit	1,200
SoCalGas | Committed Letters of Credit Outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	0
SoCalGas | Commercial paper outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	0
SoCalGas | Amounts outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	0
SI Partners and IEnova | IEnova and SI Partners Committed Line Of Credit Due September 2025
Line of Credit Facility [Line Items]
Maximum borrowing capacity	500
Available unused credit	110
SI Partners and IEnova | IEnova and SI Partners Committed Line Of Credit Due September 2025 | Committed Letters of Credit Outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	0
SI Partners and IEnova | IEnova and SI Partners Committed Line Of Credit Due August 2026
Line of Credit Facility [Line Items]
Maximum borrowing capacity	1,000
Available unused credit	1,000
SI Partners and IEnova | IEnova and SI Partners Committed Line Of Credit Due August 2026 | Committed Letters of Credit Outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	0
SI Partners and IEnova | IEnova and SI Partners Committed Line Of Credit Due August 2028
Line of Credit Facility [Line Items]
Maximum borrowing capacity	1,500
Available unused credit	949
SI Partners and IEnova | IEnova and SI Partners Committed Line Of Credit Due August 2028 | Committed Letters of Credit Outstanding
Line of Credit Facility [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
Line of Credit Facility [Line Items]
Line of credit outstanding	0
SI Partners and IEnova | Commercial paper outstanding | IEnova and SI Partners Committed Line Of Credit Due August 2026
Line of Credit Facility [Line Items]
Line of credit outstanding	0
SI Partners and IEnova | Commercial paper outstanding | IEnova and SI Partners Committed Line Of Credit Due August 2028
Line of Credit Facility [Line Items]
Line of credit outstanding	0
SI Partners and IEnova | Amounts outstanding | IEnova and SI Partners Committed Line Of Credit Due September 2025
Line of Credit Facility [Line Items]
Line of credit outstanding	(390)
SI Partners and IEnova | Amounts outstanding | IEnova and SI Partners Committed Line Of Credit Due August 2026
Line of Credit Facility [Line Items]
Line of credit outstanding	0
SI Partners and IEnova | Amounts outstanding | IEnova and SI Partners Committed Line Of Credit Due August 2028
Line of Credit Facility [Line Items]
Line of credit outstanding	(551)
Port Arthur LNG | Port Arthur LNG Committed Line Of Credit Due 2030
Line of Credit Facility [Line Items]
Maximum borrowing capacity	200
Available unused credit	136
Port Arthur LNG | Port Arthur LNG Committed Line Of Credit Due 2030 | Committed Letters of Credit Outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	(64)
Port Arthur LNG | Commercial paper outstanding | Port Arthur LNG Committed Line Of Credit Due 2030
Line of Credit Facility [Line Items]
Line of credit outstanding	0
Port Arthur LNG | Amounts outstanding | Port Arthur LNG Committed Line Of Credit Due 2030
Line of Credit Facility [Line Items]
Line of credit outstanding	$ 0