DERIVATIVE FINANCIAL INSTRUMENTS - BALANCE SHEET (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Other Current Assets [Member]
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract]
Net amount presented on balance sheet	$ 333,000,000	$ 74,000,000
Additional margin posted for commodity contracts not subject to rate recovery	451,000,000	58,000,000
Additional margin posted for commodity contracts subject to rate recovery	18,000,000	46,000,000
Total	802,000,000	178,000,000
Other long-term assets(3)
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract]
Net amount presented on balance sheet	152,000,000	62,000,000
Additional margin posted for commodity contracts not subject to rate recovery	0	0
Additional margin posted for commodity contracts subject to rate recovery	0	0
Total	152,000,000	62,000,000
Other current liabilities
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract]
Net amount presented on balance sheet	(280,000,000)	(87,000,000)
Additional margin posted for commodity contracts not subject to rate recovery	0	0
Additional margin posted for commodity contracts subject to rate recovery	0	0
Total	(280,000,000)	(87,000,000)
Deferred credits and other
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract]
Net amount presented on balance sheet	(94,000,000)	(134,000,000)
Additional margin posted for commodity contracts not subject to rate recovery	0	0
Additional margin posted for commodity contracts subject to rate recovery	0	0
Total	(94,000,000)	(134,000,000)
Derivatives designated as hedging instruments: | Other Current Assets [Member]
Derivative Instruments in Hedges, at Fair Value, Net [Abstract]
Interest rate instruments	10,000,000	0
Foreign exchange instruments	0	1,000,000
Interest rate and foreign exchange instruments	0	0
Derivatives designated as hedging instruments: | Other long-term assets(3)
Derivative Instruments in Hedges, at Fair Value, Net [Abstract]
Interest rate instruments	33,000,000	6,000,000
Foreign exchange instruments	0	1,000,000
Interest rate and foreign exchange instruments	0	0
Derivatives designated as hedging instruments: | Other current liabilities
Derivative Instruments in Hedges, at Fair Value, Net [Abstract]
Interest rate instruments	0	(6,000,000)
Foreign exchange instruments	(7,000,000)	(1,000,000)
Interest rate and foreign exchange instruments	(105,000,000)	(1,000,000)
Derivatives designated as hedging instruments: | Deferred credits and other
Derivative Instruments in Hedges, at Fair Value, Net [Abstract]
Interest rate instruments	0	(2,000,000)
Foreign exchange instruments	(1,000,000)	0
Interest rate and foreign exchange instruments	0	(130,000,000)
Derivatives not designated as hedging instruments: | Other Current Assets [Member]
Derivative Instruments in Hedges, at Fair Value, Net [Abstract]
Interest rate instruments	33,000,000
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract]
Commodity contracts not subject to rate recovery	480,000,000	136,000,000
Associated offsetting commodity contracts not subject to rate recovery	(301,000,000)	(93,000,000)
Commodity contracts subject to rate recovery	138,000,000	38,000,000
Associated offsetting commodity contracts subject to rate recovery	(27,000,000)	(8,000,000)
Derivatives not designated as hedging instruments: | Other long-term assets(3)
Derivative Instruments in Hedges, at Fair Value, Net [Abstract]
Interest rate instruments	0
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract]
Commodity contracts not subject to rate recovery	133,000,000	11,000,000
Associated offsetting commodity contracts not subject to rate recovery	(39,000,000)	(8,000,000)
Commodity contracts subject to rate recovery	27,000,000	52,000,000
Associated offsetting commodity contracts subject to rate recovery	(2,000,000)	0
Derivatives not designated as hedging instruments: | Other current liabilities
Derivative Instruments in Hedges, at Fair Value, Net [Abstract]
Interest rate instruments	0
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract]
Commodity contracts not subject to rate recovery	(399,000,000)	(122,000,000)
Associated offsetting commodity contracts not subject to rate recovery	301,000,000	93,000,000
Commodity contracts subject to rate recovery	(97,000,000)	(58,000,000)
Associated offsetting commodity contracts subject to rate recovery	27,000,000	8,000,000
Derivatives not designated as hedging instruments: | Deferred credits and other
Derivative Instruments in Hedges, at Fair Value, Net [Abstract]
Interest rate instruments	0
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract]
Commodity contracts not subject to rate recovery	(132,000,000)	(10,000,000)
Associated offsetting commodity contracts not subject to rate recovery	39,000,000	8,000,000
Commodity contracts subject to rate recovery	(2,000,000)	0
Associated offsetting commodity contracts subject to rate recovery	2,000,000	0
San Diego Gas and Electric Company | Other Current Assets [Member]
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract]
Net amount presented on balance sheet	95,000,000	29,000,000
Additional margin posted for commodity contracts subject to rate recovery	17,000,000	28,000,000
Total	112,000,000	57,000,000
San Diego Gas and Electric Company | Other long-term assets(3)
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract]
Net amount presented on balance sheet	25,000,000	52,000,000
Additional margin posted for commodity contracts subject to rate recovery	0	0
Total	25,000,000	52,000,000
San Diego Gas and Electric Company | Other current liabilities
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract]
Net amount presented on balance sheet	(1,000,000)	(15,000,000)
Additional margin posted for commodity contracts subject to rate recovery	0	0
Total	(1,000,000)	(15,000,000)
San Diego Gas and Electric Company | Deferred credits and other
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract]
Net amount presented on balance sheet	0	0
Additional margin posted for commodity contracts subject to rate recovery	0	0
Total	0	0
San Diego Gas and Electric Company | Derivatives not designated as hedging instruments: | Other Current Assets [Member]
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract]
Commodity contracts subject to rate recovery	107,000,000	34,000,000
Associated offsetting commodity contracts subject to rate recovery	(12,000,000)	(5,000,000)
San Diego Gas and Electric Company | Derivatives not designated as hedging instruments: | Other long-term assets(3)
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract]
Commodity contracts subject to rate recovery	27,000,000	52,000,000
Associated offsetting commodity contracts subject to rate recovery	(2,000,000)	0
San Diego Gas and Electric Company | Derivatives not designated as hedging instruments: | Other current liabilities
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract]
Commodity contracts subject to rate recovery	(13,000,000)	(20,000,000)
Associated offsetting commodity contracts subject to rate recovery	12,000,000	5,000,000
San Diego Gas and Electric Company | Derivatives not designated as hedging instruments: | Deferred credits and other
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract]
Commodity contracts subject to rate recovery	(2,000,000)	0
Associated offsetting commodity contracts subject to rate recovery	2,000,000	0
SoCalGas | Other Current Assets [Member]
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract]
Net amount presented on balance sheet	16,000,000	1,000,000
Additional margin posted for commodity contracts subject to rate recovery	1,000,000	18,000,000
Total	17,000,000	19,000,000
SoCalGas | Other long-term assets(3)
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract]
Net amount presented on balance sheet	0	0
Additional margin posted for commodity contracts subject to rate recovery	0	0
Total	0	0
SoCalGas | Other current liabilities
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract]
Net amount presented on balance sheet	(69,000,000)	(35,000,000)
Additional margin posted for commodity contracts subject to rate recovery	0	0
Total	(69,000,000)	(35,000,000)
SoCalGas | Deferred credits and other
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract]
Net amount presented on balance sheet	0	0
Additional margin posted for commodity contracts subject to rate recovery	0	0
Total	0	0
SoCalGas | Derivatives not designated as hedging instruments: | Other Current Assets [Member]
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract]
Commodity contracts subject to rate recovery	31,000,000	4,000,000
Associated offsetting commodity contracts subject to rate recovery	(15,000,000)	(3,000,000)
SoCalGas | Derivatives not designated as hedging instruments: | Other long-term assets(3)
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract]
Commodity contracts subject to rate recovery	0	0
Associated offsetting commodity contracts subject to rate recovery	0	0
SoCalGas | Derivatives not designated as hedging instruments: | Other current liabilities
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract]
Commodity contracts subject to rate recovery	(84,000,000)	(38,000,000)
Associated offsetting commodity contracts subject to rate recovery	15,000,000	3,000,000
SoCalGas | Derivatives not designated as hedging instruments: | Deferred credits and other
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract]
Commodity contracts subject to rate recovery	0	0
Associated offsetting commodity contracts subject to rate recovery	$ 0	$ 0