DEBT AND CREDIT FACILITIES - LINES OF CREDIT (Details) $ in Millions	Jun. 30, 2025 USD ($)
Line of Credit Facility [Line Items]
Total facility	$ 9,900
Available unused credit	7,532
Commercial paper outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	(1,439)
Line of Credit
Line of Credit Facility [Line Items]
Line of credit outstanding	(842)
Letters of credit outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	(87)
Other Sempra
Line of Credit Facility [Line Items]
Total facility	4,000
Available unused credit	2,772
Other Sempra \| Commercial paper outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	(1,228)
Other Sempra \| Line of Credit
Line of Credit Facility [Line Items]
Line of credit outstanding	0
Other Sempra \| Letters of credit outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	0
SDG&E
Line of Credit Facility [Line Items]
Total facility	1,500
Available unused credit	1,500
SDG&E \| Commercial paper outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	0
SDG&E \| Line of Credit
Line of Credit Facility [Line Items]
Line of credit outstanding	0
SDG&E \| Letters of credit outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	0
SoCalGas
Line of Credit Facility [Line Items]
Total facility	1,200
Available unused credit	989
SoCalGas \| Commercial paper outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	(211)
SoCalGas \| Line of Credit
Line of Credit Facility [Line Items]
Line of credit outstanding	0
SoCalGas \| 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 September 2025
Line of Credit Facility [Line Items]
Total facility	500
Available unused credit	214
SI Partners and IEnova \| IEnova and SI Partners Committed Line Of Credit Due September 2025 \| Commercial paper 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
Line of Credit Facility [Line Items]
Line of credit outstanding	(286)
SI Partners and IEnova \| IEnova and SI Partners Committed Line Of Credit Due August 2026
Line of Credit Facility [Line Items]
Total facility	1,000
Available unused credit	1,000
SI Partners and IEnova \| IEnova and SI Partners Committed Line Of Credit Due August 2026 \| Commercial paper 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
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]
Total facility	1,500
Available unused credit	944
SI Partners and IEnova \| IEnova and SI Partners Committed Line Of Credit Due August 2028 \| Commercial paper 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
Line of Credit Facility [Line Items]
Line of credit outstanding	(556)
SI Partners and IEnova \| Letters of credit 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 \| Letters of credit 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 \| Letters of credit outstanding \| IEnova and SI Partners Committed Line Of Credit Due August 2028
Line of Credit Facility [Line Items]
Line of credit outstanding	0
Port Arthur LNG \| Port Arthur LNG Committed Line Of Credit Due 2030
Line of Credit Facility [Line Items]
Total facility	200
Available unused credit	113
Port Arthur LNG \| Port Arthur LNG Committed Line Of Credit Due 2030 \| Commercial paper outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	0
Port Arthur LNG \| Port Arthur LNG Committed Line Of Credit Due 2030 \| Line of Credit
Line of Credit Facility [Line Items]
Line of credit outstanding	0
Port Arthur LNG \| Letters of credit outstanding \| Port Arthur LNG Committed Line Of Credit Due 2030
Line of Credit Facility [Line Items]
Line of credit outstanding	$ (87)