DERIVATIVE FINANCIAL INSTRUMENTS - DERIVATIVE INSTRUMENTS ON THE CONDENSED BALANCE SHEET (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Other current assets
Derivatives not designated as hedging instruments:
Net amounts presented on the balance sheet	$ 47	$ 333
Additional cash collateral for commodity contracts not subject to rate recovery	317	451
Additional cash collateral for commodity contracts subject to rate recovery	95	18
Total	459	802
Other long-term assets
Derivatives not designated as hedging instruments:
Net amounts presented on the balance sheet	52	152
Additional cash collateral for commodity contracts not subject to rate recovery	0	0
Additional cash collateral for commodity contracts subject to rate recovery	0	0
Total	52	152
Other Current Liabilities
Derivatives not designated as hedging instruments:
Net amounts presented on the balance sheet	(55)	(280)
Additional cash collateral for commodity contracts not subject to rate recovery	0	0
Additional cash collateral for commodity contracts subject to rate recovery	0	0
Total	(55)	(280)
Deferred credits and other
Derivatives not designated as hedging instruments:
Net amounts presented on the balance sheet	(87)	(94)
Additional cash collateral for commodity contracts not subject to rate recovery	0	0
Additional cash collateral for commodity contracts subject to rate recovery	0	0
Total	(87)	(94)
Derivatives designated as hedging instruments | Other current assets
Derivatives designated as hedging instruments:
Interest rate instruments	10	10
Foreign exchange instruments	0	0
Interest rate and foreign exchange instruments		0
Derivatives designated as hedging instruments | Other long-term assets
Derivatives designated as hedging instruments:
Interest rate instruments	29	33
Foreign exchange instruments	0	0
Interest rate and foreign exchange instruments		0
Derivatives designated as hedging instruments | Other Current Liabilities
Derivatives designated as hedging instruments:
Interest rate instruments	0	0
Foreign exchange instruments	(13)	(7)
Interest rate and foreign exchange instruments		(105)
Derivatives designated as hedging instruments | Deferred credits and other
Derivatives designated as hedging instruments:
Interest rate instruments	(73)	0
Foreign exchange instruments	0	(1)
Interest rate and foreign exchange instruments		0
Derivatives not designated as hedging instruments | Other current assets
Derivatives designated as hedging instruments:
Interest rate instruments		33
Derivatives not designated as hedging instruments:
Commodity contracts not subject to rate recovery	217	480
Associated offsetting commodity contracts	(197)	(301)
Commodity contracts subject to rate recovery	38	138
Associated offsetting commodity contracts	(21)	(27)
Derivatives not designated as hedging instruments | Other long-term assets
Derivatives designated as hedging instruments:
Interest rate instruments		0
Derivatives not designated as hedging instruments:
Commodity contracts not subject to rate recovery	23	133
Associated offsetting commodity contracts	(23)	(39)
Commodity contracts subject to rate recovery	26	27
Associated offsetting commodity contracts	(3)	(2)
Derivatives not designated as hedging instruments | Other Current Liabilities
Derivatives designated as hedging instruments:
Interest rate instruments		0
Derivatives not designated as hedging instruments:
Commodity contracts not subject to rate recovery	(208)	(399)
Associated offsetting commodity contracts	197	301
Commodity contracts subject to rate recovery	(52)	(97)
Associated offsetting commodity contracts	21	27
Derivatives not designated as hedging instruments | Deferred credits and other
Derivatives designated as hedging instruments:
Interest rate instruments		0
Derivatives not designated as hedging instruments:
Commodity contracts not subject to rate recovery	(28)	(132)
Associated offsetting commodity contracts	23	39
Commodity contracts subject to rate recovery	(12)	(2)
Associated offsetting commodity contracts	3	2
San Diego Gas and Electric Company | Other current assets
Derivatives not designated as hedging instruments:
Net amounts presented on the balance sheet	16	95
Additional cash collateral for commodity contracts subject to rate recovery	84	17
Total	100	112
San Diego Gas and Electric Company | Other long-term assets
Derivatives not designated as hedging instruments:
Net amounts presented on the balance sheet	23	25
Additional cash collateral for commodity contracts subject to rate recovery	0	0
Total	23	25
San Diego Gas and Electric Company | Other Current Liabilities
Derivatives not designated as hedging instruments:
Net amounts presented on the balance sheet	(2)	(1)
Additional cash collateral for commodity contracts subject to rate recovery	0	0
Total	(2)	(1)
San Diego Gas and Electric Company | Deferred credits and other
Derivatives not designated as hedging instruments:
Net amounts presented on the balance sheet	0	0
Additional cash collateral 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
Derivatives not designated as hedging instruments:
Commodity contracts subject to rate recovery	35	107
Associated offsetting commodity contracts	(19)	(12)
San Diego Gas and Electric Company | Derivatives not designated as hedging instruments | Other long-term assets
Derivatives not designated as hedging instruments:
Commodity contracts subject to rate recovery	26	27
Associated offsetting commodity contracts	(3)	(2)
San Diego Gas and Electric Company | Derivatives not designated as hedging instruments | Other Current Liabilities
Derivatives not designated as hedging instruments:
Commodity contracts subject to rate recovery	(21)	(13)
Associated offsetting commodity contracts	19	12
San Diego Gas and Electric Company | Derivatives not designated as hedging instruments | Deferred credits and other
Derivatives not designated as hedging instruments:
Commodity contracts subject to rate recovery	(3)	(2)
Associated offsetting commodity contracts	3	2
Southern California Gas Company | Other current assets
Derivatives not designated as hedging instruments:
Net amounts presented on the balance sheet	1	16
Additional cash collateral for commodity contracts subject to rate recovery	11	1
Total	12	17
Southern California Gas Company | Other long-term assets
Derivatives not designated as hedging instruments:
Net amounts presented on the balance sheet	0	0
Additional cash collateral for commodity contracts subject to rate recovery	0	0
Total	0	0
Southern California Gas Company | Other Current Liabilities
Derivatives not designated as hedging instruments:
Net amounts presented on the balance sheet	(29)	(69)
Additional cash collateral for commodity contracts subject to rate recovery	0	0
Total	(29)	(69)
Southern California Gas Company | Deferred credits and other
Derivatives not designated as hedging instruments:
Net amounts presented on the balance sheet	(9)	0
Additional cash collateral for commodity contracts subject to rate recovery	0	0
Total	(9)	0
Southern California Gas Company | Derivatives not designated as hedging instruments | Other current assets
Derivatives not designated as hedging instruments:
Commodity contracts subject to rate recovery	3	31
Associated offsetting commodity contracts	(2)	(15)
Southern California Gas Company | Derivatives not designated as hedging instruments | Other long-term assets
Derivatives not designated as hedging instruments:
Commodity contracts subject to rate recovery	0	0
Associated offsetting commodity contracts	0	0
Southern California Gas Company | Derivatives not designated as hedging instruments | Other Current Liabilities
Derivatives not designated as hedging instruments:
Commodity contracts subject to rate recovery	(31)	(84)
Associated offsetting commodity contracts	2	15
Southern California Gas Company | Derivatives not designated as hedging instruments | Deferred credits and other
Derivatives not designated as hedging instruments:
Commodity contracts subject to rate recovery	(9)	0
Associated offsetting commodity contracts	$ 0	$ 0