DERIVATIVE FINANCIAL INSTRUMENTS - DERIVATIVE COMMODITY VOLUMES (Details)	9 Months Ended	12 Months Ended
Sep. 30, 2025 MMBTU MWh	Dec. 31, 2024 MMBTU MWh
Natural gas
Derivative [Line Items]
Derivative, nonmonetary notional amount	1,405	637
Congestion revenue rights
Derivative [Line Items]
Derivative, nonmonetary notional amount \| MWh	20	27
SDG&E \| Natural gas
Derivative [Line Items]
Derivative, nonmonetary notional amount	17	16
SDG&E \| Congestion revenue rights
Derivative [Line Items]
Derivative, nonmonetary notional amount \| MWh	20	27
SoCalGas \| Natural gas
Derivative [Line Items]
Derivative, nonmonetary notional amount	415	347

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 20
-Name Accounting Standards Codification
-Section 25
-Paragraph 6A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480682/815-20-25-6A

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480237/815-40-50-5

Name:	us-gaap_DerivativeLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration