DERIVATIVE FINANCIAL INSTRUMENTS - DERIVATIVE IMPACT ON INCOME (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Derivative [Line Items]
Pretax (loss) gain reclassified from AOCI into earnings	$ 66	$ 29	$ 227	$ 118
Pretax (loss) gain on derivatives recognized in earnings	(3)	(3)	2	(26)
Derivatives designated as hedging instruments | Cash Flow Hedging
Derivative [Line Items]
Pretax gain (loss) recognized in OCI	75	15	262	91
Pretax (loss) gain reclassified from AOCI into earnings	(6)	(23)	(23)	(63)
Derivatives designated as hedging instruments | Interest Expense | Cash Flow Hedging | Interest Rate Contract
Derivative [Line Items]
Pretax gain (loss) recognized in OCI	4	7	39	27
Pretax (loss) gain reclassified from AOCI into earnings	(2)	1	(1)	0
Derivatives designated as hedging instruments | Interest Expense | Cash Flow Hedging | Interest Rate Contract | Southern California Gas Company
Derivative [Line Items]
Pretax gain (loss) recognized in OCI			0	0
Pretax (loss) gain reclassified from AOCI into earnings			(1)	0
Derivatives designated as hedging instruments | Interest Expense | Cash Flow Hedging | Interest rate and foreign exchange instruments
Derivative [Line Items]
Pretax gain (loss) recognized in OCI	0	(3)
Pretax (loss) gain reclassified from AOCI into earnings			1	0
Derivatives designated as hedging instruments | Equity Earnings | Cash Flow Hedging | Interest Rate Contract
Derivative [Line Items]
Pretax gain (loss) recognized in OCI	68	3	212	54
Pretax (loss) gain reclassified from AOCI into earnings	(1)	(19)	(28)	(57)
Derivatives designated as hedging instruments | Equity Earnings | Cash Flow Hedging | Foreign Exchange Instruments
Derivative [Line Items]
Pretax gain (loss) recognized in OCI	1	3	(1)	5
Pretax (loss) gain reclassified from AOCI into earnings	0	0	1	(1)
Derivatives designated as hedging instruments | Revenues: Energy- Related Businesses | Cash Flow Hedging | Foreign Exchange Instruments
Derivative [Line Items]
Pretax gain (loss) recognized in OCI	2	5	(1)	7
Pretax (loss) gain reclassified from AOCI into earnings	0	0	2	(1)
Derivatives designated as hedging instruments | Other (Expense) Income, Net | Cash Flow Hedging | Foreign Exchange Instruments
Derivative [Line Items]
Pretax (loss) gain reclassified from AOCI into earnings			(1)	0
Derivatives designated as hedging instruments | Other (Expense) Income, Net | Cash Flow Hedging | Interest rate and foreign exchange instruments
Derivative [Line Items]
Pretax gain (loss) recognized in OCI			13	(2)
Pretax (loss) gain reclassified from AOCI into earnings	(3)	(5)	3	(4)
Derivatives not designated as hedging instruments
Derivative [Line Items]
Pretax (loss) gain on derivatives recognized in earnings	(222)	(170)	(460)	(339)
Derivatives not designated as hedging instruments | Foreign Exchange Instruments
Derivative [Line Items]
Pretax (loss) gain on derivatives recognized in earnings	0	2	0	(22)
Derivatives not designated as hedging instruments | Commodity contracts not subject to rate recovery
Derivative [Line Items]
Pretax (loss) gain on derivatives recognized in earnings	(227)	(154)	(455)	(344)
Derivatives not designated as hedging instruments | Commodity contracts subject to rate recovery | Southern California Gas Company
Derivative [Line Items]
Pretax (loss) gain on derivatives recognized in earnings	(11)	(26)	(15)	(24)
Derivatives not designated as hedging instruments | Commodity contracts subject to rate recovery | San Diego Gas and Electric Company
Derivative [Line Items]
Pretax (loss) gain on derivatives recognized in earnings	16	8	10	51
Derivatives not designated as hedging instruments | Cost of Electric Fuel and Purchased Power | Commodity contracts subject to rate recovery
Derivative [Line Items]
Pretax (loss) gain on derivatives recognized in earnings	16	8	10	51
Derivatives not designated as hedging instruments | Cost of Natural Gas | Commodity contracts subject to rate recovery
Derivative [Line Items]
Pretax (loss) gain on derivatives recognized in earnings	$ (11)	$ (26)	$ (15)	$ (24)