DEBT AND CREDIT FACILITIES - LINES OF CREDIT (Details) $ in Millions	Jun. 30, 2026 USD ($)
Line of Credit Facility [Line Items]
Total facility	$ 10,200
Available unused credit	8,154
Commercial paper outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	(1,418)
Line of Credit
Line of Credit Facility [Line Items]
Line of credit outstanding	(365)
Letters of credit outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	(263)
Other Sempra
Line of Credit Facility [Line Items]
Total facility	4,000
Available unused credit	2,684
Other Sempra \| Commercial paper outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	(1,316)
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	1,498
SDG&E \| Commercial paper outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	(2)
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	1,100
SoCalGas \| Commercial paper outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	(100)
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 \| SI Partners and IEnova Committed Line Of Credit Due September 2026
Line of Credit Facility [Line Items]
Total facility	500
Available unused credit	345
SI Partners and IEnova \| SI Partners and IEnova Committed Line Of Credit Due September 2026 \| Commercial paper outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	0
SI Partners and IEnova \| SI Partners and IEnova Committed Line Of Credit Due September 2026 \| Line of Credit
Line of Credit Facility [Line Items]
Line of credit outstanding	(155)
SI Partners and IEnova \| SI Partners and IEnova Committed Line Of Credit Due August 2028
Line of Credit Facility [Line Items]
Total facility	1,500
Available unused credit	1,290
SI Partners and IEnova \| SI Partners and IEnova 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 \| SI Partners and IEnova Committed Line Of Credit Due August 2028 \| Line of Credit
Line of Credit Facility [Line Items]
Line of credit outstanding	(210)
SI Partners and IEnova \| SI Partners and IEnova Committed Line Of Credit Due December 2028
Line of Credit Facility [Line Items]
Total facility	1,000
Available unused credit	1,000
SI Partners and IEnova \| SI Partners and IEnova Committed Line Of Credit Due December 2028 \| Commercial paper outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	0
SI Partners and IEnova \| SI Partners and IEnova Committed Line Of Credit Due December 2028 \| Line of Credit
Line of Credit Facility [Line Items]
Line of credit outstanding	0
SI Partners and IEnova \| Letters of credit outstanding \| SI Partners and IEnova Committed Line Of Credit Due September 2026
Line of Credit Facility [Line Items]
Line of credit outstanding	0
SI Partners and IEnova \| Letters of credit outstanding \| SI Partners and IEnova Committed Line Of Credit Due August 2028
Line of Credit Facility [Line Items]
Line of credit outstanding	0
SI Partners and IEnova \| Letters of credit outstanding \| SI Partners and IEnova Committed Line Of Credit Due December 2028
Line of Credit Facility [Line Items]
Line of credit outstanding	0
Port Arthur LNG I \| Port Arthur LNG I Committed Line Of Credit Due March 2030
Line of Credit Facility [Line Items]
Total facility	200
Available unused credit	113
Port Arthur LNG I \| Port Arthur LNG I Committed Line Of Credit Due March 2030 \| Commercial paper outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	0
Port Arthur LNG I \| Port Arthur LNG I Committed Line Of Credit Due March 2030 \| Line of Credit
Line of Credit Facility [Line Items]
Line of credit outstanding	0
Port Arthur LNG I \| Letters of credit outstanding \| Port Arthur LNG I Committed Line Of Credit Due March 2030
Line of Credit Facility [Line Items]
Line of credit outstanding	(87)
Port Arthur LNG II \| Port Arthur LNG II Committed Line Of Credit Due September 2030
Line of Credit Facility [Line Items]
Total facility	300
Available unused credit	124
Port Arthur LNG II \| Port Arthur LNG II Committed Line Of Credit Due September 2030 \| Commercial paper outstanding
Line of Credit Facility [Line Items]
Line of credit outstanding	0
Port Arthur LNG II \| Port Arthur LNG II Committed Line Of Credit Due September 2030 \| Line of Credit
Line of Credit Facility [Line Items]
Line of credit outstanding	0
Port Arthur LNG II \| Letters of credit outstanding \| Port Arthur LNG II Committed Line Of Credit Due September 2030
Line of Credit Facility [Line Items]
Line of credit outstanding	$ (176)