DEBT AND CREDIT FACILITIES - COMMITTED LINES OF CREDIT (Details) $ in Millions	3 Months Ended
	Mar. 31, 2025 USD ($)
Line of Credit Facility [Line Items]
Total facility	$ 9,900
Available unused credit	8,405
Committed Letters of Credit Outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	(87)
Commercial paper outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	(684)
Amounts outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	(724)
Uncommitted Line of Credit
Line of Credit Facility [Line Items]
Total facility	100
Line of credit, amount outstanding	5
SDG&E
Line of Credit Facility [Line Items]
Total facility	1,500
Available unused credit	1,363
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	(137)
SDG&E | Amounts 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	1,053
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	(147)
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]
Total facility	500
Available unused credit	142
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 2028
Line of Credit Facility [Line Items]
Total facility	1,500
Available unused credit	1,134
SI Partners and IEnova | Committed 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 | Committed 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 | Committed 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
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	(358)
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	(366)
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 | Committed Letters of Credit Outstanding | Port Arthur LNG Committed Line Of Credit Due 2030
Line of Credit Facility [Line Items]
Line of credit outstanding	(87)
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
ECA LNG Phase 1 | Interbank Equilibrium Interest Rate
Line of Credit Facility [Line Items]
Variable percentage rate (in percent)	1.54%
ECA LNG Phase 1 | Secured Overnight Financing Rate (SOFR)
Line of Credit Facility [Line Items]
Variable percentage rate (in percent)	1.64%
ECA LNG Phase 1 | Line of Credit
Line of Credit Facility [Line Items]
Variable percentage rate (in percent)	0.10%
Other Sempra
Line of Credit Facility [Line Items]
Total facility	$ 4,000
Available unused credit	3,600
Other Sempra | Committed Letters of Credit Outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	0
Other Sempra | Commercial paper outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	(400)
Other Sempra | Amounts outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	$ 0