DERIVATIVE FINANCIAL INSTRUMENTS - DERIVATIVE COMMODITY VOLUMES (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2026 MWh MMBTU	Dec. 31, 2025 MMBTU MWh
Disposal Group Held-for-sale | SI Partners
Derivative [Line Items]
Disposal group, notional amount, energy measure	1,329,000,000	1,016,000,000
Natural gas
Derivative [Line Items]
Derivative, nonmonetary notional amount	438	336
Congestion revenue rights
Derivative [Line Items]
Derivative, nonmonetary notional amount | MWh	16	18
SDG&E | Natural gas
Derivative [Line Items]
Derivative, nonmonetary notional amount	14	14
SDG&E | Congestion revenue rights
Derivative [Line Items]
Derivative, nonmonetary notional amount | MWh	16	18
SoCalGas | Natural gas
Derivative [Line Items]
Derivative, nonmonetary notional amount	424	322