DERIVATIVE FINANCIAL INSTRUMENTS - DERIVATIVE INSTRUMENTS ON THE CONDENSED BALANCE SHEET (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Current assets: Fixed-price contracts and other derivatives
Derivatives, Fair Value [Line Items]
Derivative asset, Net amounts presented on the balance sheet	$ 5	$ 21
Derivative asset, Additional cash collateral for commodity contracts subject to rate recovery	25	23
Derivative assets, Total	30	44
Assets held for sale
Derivatives, Fair Value [Line Items]
Derivative asset, Net amounts presented on the balance sheet	407	271
Derivative asset, Additional cash collateral for commodity contracts not subject to rate recovery	60	38
Derivative assets, Total	467	309
Other long-term assets
Derivatives, Fair Value [Line Items]
Derivative asset, Net amounts presented on the balance sheet	9	9
Derivative asset, Additional cash collateral for commodity contracts subject to rate recovery	0	0
Derivative assets, Total	9	9
Other current liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, Net amounts presented on the balance sheet	(13)	(62)
Derivative liability, Additional cash collateral for commodity contracts subject to rate recovery	0	0
Derivative liabilities, Total	(13)	(62)
Liabilities held for sale
Derivatives, Fair Value [Line Items]
Derivative liability, Net amounts presented on the balance sheet	(228)	(69)
Derivative liability, Additional cash collateral for commodity contracts not subject to rate recovery	0	0
Derivative liabilities, Total	(228)	(69)
Deferred credits and other
Derivatives, Fair Value [Line Items]
Derivative liability, Net amounts presented on the balance sheet	(8)	(4)
Derivative liability, Additional cash collateral for commodity contracts subject to rate recovery	0	0
Derivative liabilities, Total	(8)	(4)
Derivatives designated as hedging instruments: | Assets held for sale | Interest rate instruments
Derivatives, Fair Value [Line Items]
Derivative asset, subject to master netting arrangement, before offset	25	25
Derivatives designated as hedging instruments: | Assets held for sale | Foreign exchange instruments
Derivatives, Fair Value [Line Items]
Derivative asset, subject to master netting arrangement, before offset	0	0
Derivatives designated as hedging instruments: | Liabilities held for sale | Interest rate instruments
Derivatives, Fair Value [Line Items]
Derivative liability, subject to master netting arrangement, before offset	0	0
Derivatives designated as hedging instruments: | Liabilities held for sale | Foreign exchange instruments
Derivatives, Fair Value [Line Items]
Derivative liability, subject to master netting arrangement, before offset	(6)	(8)
Derivatives not designated as hedging instruments: | Current assets: Fixed-price contracts and other derivatives | Commodity contracts subject to rate recovery
Derivatives, Fair Value [Line Items]
Derivative asset, subject to master netting arrangement, before offset	7	25
Derivative asset, subject to master netting arrangement, liability offset	(2)	(4)
Associated offsetting cash collateral	0	0
Derivatives not designated as hedging instruments: | Assets held for sale | Interest rate instruments
Derivatives, Fair Value [Line Items]
Derivative asset, subject to master netting arrangement, before offset	153	242
Derivatives not designated as hedging instruments: | Assets held for sale | Foreign exchange instruments
Derivatives, Fair Value [Line Items]
Derivative asset, subject to master netting arrangement, before offset	12
Derivatives not designated as hedging instruments: | Assets held for sale | Commodity contracts not subject to rate recovery
Derivatives, Fair Value [Line Items]
Derivative asset, subject to master netting arrangement, before offset	226	9
Derivative asset, subject to master netting arrangement, liability offset	(9)	(5)
Derivatives not designated as hedging instruments: | Other long-term assets | Commodity contracts subject to rate recovery
Derivatives, Fair Value [Line Items]
Derivative asset, subject to master netting arrangement, before offset	14	11
Derivative asset, subject to master netting arrangement, liability offset	(5)	(2)
Associated offsetting cash collateral	0	0
Derivatives not designated as hedging instruments: | Other current liabilities | Foreign exchange instruments
Derivatives, Fair Value [Line Items]
Derivative liability, subject to master netting arrangement, before offset	(3)
Derivatives not designated as hedging instruments: | Other current liabilities | Commodity contracts not subject to rate recovery
Derivatives, Fair Value [Line Items]
Derivative liability, subject to master netting arrangement, before offset	0
Derivative liability, subject to master netting arrangement, asset offset	0
Derivatives not designated as hedging instruments: | Other current liabilities | Commodity contracts subject to rate recovery
Derivatives, Fair Value [Line Items]
Derivative liability, subject to master netting arrangement, before offset	(24)	(134)
Derivative liability, subject to master netting arrangement, asset offset	2	4
Associated offsetting cash collateral	12	68
Derivatives not designated as hedging instruments: | Liabilities held for sale | Interest rate instruments
Derivatives, Fair Value [Line Items]
Derivative liability, subject to master netting arrangement, before offset	0	0
Derivatives not designated as hedging instruments: | Liabilities held for sale | Foreign exchange instruments
Derivatives, Fair Value [Line Items]
Derivative asset, subject to master netting arrangement, before offset	0
Derivatives not designated as hedging instruments: | Liabilities held for sale | Commodity contracts not subject to rate recovery
Derivatives, Fair Value [Line Items]
Derivative liability, subject to master netting arrangement, before offset	(231)	(66)
Derivative liability, subject to master netting arrangement, asset offset	9	5
Derivatives not designated as hedging instruments: | Deferred credits and other | Commodity contracts subject to rate recovery
Derivatives, Fair Value [Line Items]
Derivative liability, subject to master netting arrangement, before offset	(17)	(10)
Derivative liability, subject to master netting arrangement, asset offset	5	2
Associated offsetting cash collateral	4	4
SDG&E | Commodity contracts subject to rate recovery
Derivatives, Fair Value [Line Items]
Derivative assets, Total	31	24
Derivative liabilities, Total	0	0
SDG&E | Current assets: Fixed-price contracts and other derivatives
Derivatives, Fair Value [Line Items]
Derivative asset, Net amounts presented on the balance sheet	4	4
Derivative asset, Additional cash collateral for commodity contracts subject to rate recovery	20	13
Derivative assets, Total	24	17
SDG&E | Other long-term assets
Derivatives, Fair Value [Line Items]
Derivative asset, Net amounts presented on the balance sheet	7	7
Derivative asset, Additional cash collateral for commodity contracts subject to rate recovery	0	0
Derivative assets, Total	7	7
SDG&E | Other current liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, Net amounts presented on the balance sheet	0	0
Derivative liability, Additional cash collateral for commodity contracts subject to rate recovery	0	0
Derivative liabilities, Total	0	0
SDG&E | Deferred credits and other
Derivatives, Fair Value [Line Items]
Derivative liability, Net amounts presented on the balance sheet	0	0
Derivative liability, Additional cash collateral for commodity contracts subject to rate recovery	0	0
Derivative liabilities, Total	0	0
SDG&E | Derivatives not designated as hedging instruments: | Current assets: Fixed-price contracts and other derivatives | Commodity contracts subject to rate recovery
Derivatives, Fair Value [Line Items]
Derivative asset, subject to master netting arrangement, before offset	4	4
Derivative asset, subject to master netting arrangement, liability offset	0	0
Associated offsetting cash collateral	0	0
SDG&E | Derivatives not designated as hedging instruments: | Other long-term assets | Commodity contracts subject to rate recovery
Derivatives, Fair Value [Line Items]
Derivative asset, subject to master netting arrangement, before offset	8	8
Derivative asset, subject to master netting arrangement, liability offset	(1)	(1)
Associated offsetting cash collateral	0	0
SDG&E | Derivatives not designated as hedging instruments: | Other current liabilities | Commodity contracts subject to rate recovery
Derivatives, Fair Value [Line Items]
Derivative liability, subject to master netting arrangement, before offset	(12)	(12)
Derivative liability, subject to master netting arrangement, asset offset	0	0
Associated offsetting cash collateral	12	12
SDG&E | Derivatives not designated as hedging instruments: | Deferred credits and other | Commodity contracts subject to rate recovery
Derivatives, Fair Value [Line Items]
Derivative liability, subject to master netting arrangement, before offset	(5)	(5)
Derivative liability, subject to master netting arrangement, asset offset	1	1
Associated offsetting cash collateral	4	4
SoCalGas | Commodity contracts subject to rate recovery
Derivatives, Fair Value [Line Items]
Derivative assets, Total	8	29
Derivative liabilities, Total	(18)	(66)
SoCalGas | Current assets: Fixed-price contracts and other derivatives
Derivatives, Fair Value [Line Items]
Derivative asset, Net amounts presented on the balance sheet	1	17
Derivative asset, Additional cash collateral for commodity contracts subject to rate recovery	5	10
Derivative assets, Total	6	27
SoCalGas | Other long-term assets
Derivatives, Fair Value [Line Items]
Derivative asset, Net amounts presented on the balance sheet	2	2
Derivative asset, Additional cash collateral for commodity contracts subject to rate recovery	0	0
Derivative assets, Total	2	2
SoCalGas | Other current liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, Net amounts presented on the balance sheet	(10)	(62)
Derivative liability, Additional cash collateral for commodity contracts subject to rate recovery	0	0
Derivative liabilities, Total	(10)	(62)
SoCalGas | Deferred credits and other
Derivatives, Fair Value [Line Items]
Derivative liability, Net amounts presented on the balance sheet	(8)	(4)
Derivative liability, Additional cash collateral for commodity contracts subject to rate recovery	0	0
Derivative liabilities, Total	(8)	(4)
SoCalGas | Derivatives not designated as hedging instruments: | Current assets: Fixed-price contracts and other derivatives | Commodity contracts subject to rate recovery
Derivatives, Fair Value [Line Items]
Derivative asset, subject to master netting arrangement, before offset	3	21
Derivative asset, subject to master netting arrangement, liability offset	(2)	(4)
Associated offsetting cash collateral		0
SoCalGas | Derivatives not designated as hedging instruments: | Other long-term assets | Commodity contracts subject to rate recovery
Derivatives, Fair Value [Line Items]
Derivative asset, subject to master netting arrangement, before offset	6	3
Derivative asset, subject to master netting arrangement, liability offset	(4)	(1)
Associated offsetting cash collateral		0
SoCalGas | Derivatives not designated as hedging instruments: | Other current liabilities | Commodity contracts subject to rate recovery
Derivatives, Fair Value [Line Items]
Derivative liability, subject to master netting arrangement, before offset	(12)	(122)
Derivative liability, subject to master netting arrangement, asset offset	2	4
Associated offsetting cash collateral		56
SoCalGas | Derivatives not designated as hedging instruments: | Deferred credits and other | Commodity contracts subject to rate recovery
Derivatives, Fair Value [Line Items]
Derivative liability, subject to master netting arrangement, before offset	(12)	(5)
Derivative liability, subject to master netting arrangement, asset offset	$ 4	1
Associated offsetting cash collateral		$ 0