DERIVATIVE FINANCIAL INSTRUMENTS - DERIVATIVE INSTRUMENTS ON THE CONDENSED BALANCE SHEET (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Current assets: Fixed-price contracts and other derivatives
Derivatives, Fair Value [Line Items]
Derivative asset, Net amounts presented on the balance sheet	$ 3	$ 26
Derivative asset, Additional cash collateral for commodity contracts not subject to rate recovery	0	40
Derivative asset, Additional cash collateral for commodity contracts subject to rate recovery	32	25
Derivative assets, Total	35	91
Assets held for sale
Derivatives, Fair Value [Line Items]
Derivative asset, Net amounts presented on the balance sheet	233
Derivative asset, Additional cash collateral for commodity contracts not subject to rate recovery	60
Derivative assets, Total	293
Other long-term assets
Derivatives, Fair Value [Line Items]
Derivative asset, Net amounts presented on the balance sheet	7	277
Derivative asset, Additional cash collateral for commodity contracts not subject to rate recovery	0	0
Derivative asset, Additional cash collateral for commodity contracts subject to rate recovery	0	0
Derivative assets, Total	7	277
Other current liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, Net amounts presented on the balance sheet	(72)	(46)
Derivative liability, Additional cash collateral for commodity contracts not subject to rate recovery	0	0
Derivative liability, Additional cash collateral for commodity contracts subject to rate recovery	0	0
Derivative liabilities, Total	(72)	(46)
Liabilities held for sale
Derivatives, Fair Value [Line Items]
Derivative liability, Net amounts presented on the balance sheet	(63)
Derivative liability, Additional cash collateral for commodity contracts not subject to rate recovery	0
Derivative liabilities, Total	(63)
Deferred credits and other
Derivatives, Fair Value [Line Items]
Derivative liability, Net amounts presented on the balance sheet	(6)	(24)
Derivative liability, Additional cash collateral for commodity contracts not subject to rate recovery	0	0
Derivative liability, Additional cash collateral for commodity contracts subject to rate recovery	0	0
Derivative liabilities, Total	(6)	(24)
Derivatives designated as hedging instruments: | Current assets: Fixed-price contracts and other derivatives | Interest rate instruments
Derivatives, Fair Value [Line Items]
Derivative asset, subject to master netting arrangement, before offset		7
Derivatives designated as hedging instruments: | Current assets: Fixed-price contracts and other derivatives | Foreign exchange instruments
Derivatives, Fair Value [Line Items]
Derivative asset, subject to master netting arrangement, before offset		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
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
Derivatives designated as hedging instruments: | Other long-term assets | Interest rate instruments
Derivatives, Fair Value [Line Items]
Derivative asset, subject to master netting arrangement, before offset		28
Derivatives designated as hedging instruments: | Other long-term assets | Foreign exchange instruments
Derivatives, Fair Value [Line Items]
Derivative asset, subject to master netting arrangement, before offset		1
Derivatives designated as hedging instruments: | Other current liabilities | Interest rate instruments
Derivatives, Fair Value [Line Items]
Derivative liability, subject to master netting arrangement, before offset		0
Derivatives designated as hedging instruments: | Other current liabilities | Foreign exchange instruments
Derivatives, Fair Value [Line Items]
Derivative liability, subject to master netting arrangement, before offset		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
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	(5)
Derivatives designated as hedging instruments: | Deferred credits and other | Interest rate instruments
Derivatives, Fair Value [Line Items]
Derivative liability, subject to master netting arrangement, before offset		0
Derivatives designated as hedging instruments: | Deferred credits and other | Foreign exchange instruments
Derivatives, Fair Value [Line Items]
Derivative liability, subject to master netting arrangement, before offset		0
Derivatives not designated as hedging instruments: | Current assets: Fixed-price contracts and other derivatives | Interest rate instruments
Derivatives, Fair Value [Line Items]
Derivative asset, subject to master netting arrangement, before offset		12
Derivatives not designated as hedging instruments: | Current assets: Fixed-price contracts and other derivatives | Commodity contracts not subject to rate recovery
Derivatives, Fair Value [Line Items]
Derivative asset, subject to master netting arrangement, before offset		16
Derivative asset, subject to master netting arrangement, liability offset		(15)
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	6	7
Derivative asset, subject to master netting arrangement, liability offset	(3)	(5)
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	189
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	24
Derivative asset, subject to master netting arrangement, liability offset	(5)
Derivatives not designated as hedging instruments: | Other long-term assets | Interest rate instruments
Derivatives, Fair Value [Line Items]
Derivative asset, subject to master netting arrangement, before offset		246
Derivatives not designated as hedging instruments: | Other long-term assets | Commodity contracts not subject to rate recovery
Derivatives, Fair Value [Line Items]
Derivative asset, subject to master netting arrangement, before offset		23
Derivative asset, subject to master netting arrangement, liability offset		(23)
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	11	4
Derivative asset, subject to master netting arrangement, liability offset	(4)	(2)
Associated offsetting cash collateral	0	0
Derivatives not designated as hedging instruments: | Other current liabilities | Interest rate instruments
Derivatives, Fair Value [Line Items]
Derivative liability, subject to master netting arrangement, before offset		0
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		(21)
Derivative liability, subject to master netting arrangement, asset offset		15
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	(127)	(55)
Derivative liability, subject to master netting arrangement, asset offset	3	5
Associated offsetting cash collateral	52	10
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
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	(63)
Derivative liability, subject to master netting arrangement, asset offset	5
Derivatives not designated as hedging instruments: | Deferred credits and other | Interest rate instruments
Derivatives, Fair Value [Line Items]
Derivative liability, subject to master netting arrangement, before offset		0
Derivatives not designated as hedging instruments: | Deferred credits and other | Commodity contracts not subject to rate recovery
Derivatives, Fair Value [Line Items]
Derivative liability, subject to master netting arrangement, before offset		(43)
Derivative liability, subject to master netting arrangement, asset offset		23
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	(13)	(10)
Derivative liability, subject to master netting arrangement, asset offset	4	2
Associated offsetting cash collateral	3	4
SDG&E | Current assets: Fixed-price contracts and other derivatives
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	24	21
Derivative assets, Total	26	23
SDG&E | Other long-term assets
Derivatives, Fair Value [Line Items]
Derivative asset, Net amounts presented on the balance sheet	5	2
Derivative asset, Additional cash collateral for commodity contracts subject to rate recovery	0	0
Derivative assets, Total	5	2
SDG&E | Other current liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, Net amounts presented on the balance sheet	0	(1)
Derivative liability, Additional cash collateral for commodity contracts subject to rate recovery	0	0
Derivative liabilities, Total	0	(1)
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	2	4
Derivative asset, subject to master netting arrangement, liability offset	0	(2)
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	7	4
Derivative asset, subject to master netting arrangement, liability offset	(2)	(2)
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	(9)	(13)
Derivative liability, subject to master netting arrangement, asset offset	0	2
Associated offsetting cash collateral	9	10
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)	(6)
Derivative liability, subject to master netting arrangement, asset offset	2	2
Associated offsetting cash collateral	3	4
SoCalGas | Current assets: Fixed-price contracts and other derivatives
Derivatives, Fair Value [Line Items]
Derivative asset, Net amounts presented on the balance sheet	1	0
Derivative asset, Additional cash collateral for commodity contracts subject to rate recovery	8	4
Derivative assets, Total	9	4
SoCalGas | Other long-term assets
Derivatives, Fair Value [Line Items]
Derivative asset, Net amounts presented on the balance sheet	2	0
Derivative asset, Additional cash collateral for commodity contracts subject to rate recovery	0	0
Derivative assets, Total	2	0
SoCalGas | Other current liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, Net amounts presented on the balance sheet	(72)	(39)
Derivative liability, Additional cash collateral for commodity contracts subject to rate recovery	0	0
Derivative liabilities, Total	(72)	(39)
SoCalGas | Deferred credits and other
Derivatives, Fair Value [Line Items]
Derivative liability, Net amounts presented on the balance sheet	(6)	(4)
Derivative liability, Additional cash collateral for commodity contracts subject to rate recovery	0	0
Derivative liabilities, Total	(6)	(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	4	3
Derivative asset, subject to master netting arrangement, liability offset	(3)	(3)
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	4	0
Derivative asset, subject to master netting arrangement, liability offset	(2)	0
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	(118)	(42)
Derivative liability, subject to master netting arrangement, asset offset	3	3
Associated offsetting cash collateral	43
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	(8)	(4)
Derivative liability, subject to master netting arrangement, asset offset	2	$ 0
Associated offsetting cash collateral	$ 0