DERIVATIVE FINANCIAL INSTRUMENTS - DERIVATIVE IMPACT ON INCOME (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Derivative [Line Items]
Pretax gain (loss) reclassified from AOCI into earnings	$ 315	$ 66	$ 321	$ 227
Pretax gain (loss) on derivatives recognized in earnings	1	(3)	5	2
Derivatives designated as hedging instruments: | Cash Flow Hedging
Derivative [Line Items]
Pretax gain (loss) recognized in OCI	367	75	401	262
Pretax gain (loss) reclassified from AOCI into earnings	13	(6)	37	(23)
Derivatives designated as hedging instruments: | Interest Expense | Cash Flow Hedging | Interest rate instruments
Derivative [Line Items]
Pretax gain (loss) recognized in OCI	320	4	337	39
Pretax gain (loss) reclassified from AOCI into earnings	(1)	(2)	(1)	(1)
Derivatives designated as hedging instruments: | Interest Expense | Cash Flow Hedging | Interest rate instruments | Southern California Gas Company
Derivative [Line Items]
Pretax gain (loss) recognized in OCI			0	0
Pretax gain (loss) reclassified from AOCI into earnings			(1)	(1)
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			7	13
Pretax gain (loss) reclassified from AOCI into earnings			1	1
Derivatives designated as hedging instruments: | Equity Earnings | Cash Flow Hedging | Interest rate instruments
Derivative [Line Items]
Pretax gain (loss) recognized in OCI	32	68	56	212
Pretax gain (loss) reclassified from AOCI into earnings	12	(1)	33	(28)
Derivatives designated as hedging instruments: | Equity Earnings | Cash Flow Hedging | Foreign exchange instruments
Derivative [Line Items]
Pretax gain (loss) recognized in OCI	7	1	1	(1)
Pretax gain (loss) reclassified from AOCI into earnings	1	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	8	2	0	(1)
Pretax gain (loss) reclassified from AOCI into earnings	0	0	0	2
Derivatives designated as hedging instruments: | Other Income (Expense), Net | Cash Flow Hedging | Foreign exchange instruments
Derivative [Line Items]
Pretax gain (loss) reclassified from AOCI into earnings	1	0	(1)	(1)
Derivatives designated as hedging instruments: | Other Income (Expense), Net | Cash Flow Hedging | Interest rate and foreign exchange instruments
Derivative [Line Items]
Pretax gain (loss) recognized in OCI	0	0
Pretax gain (loss) reclassified from AOCI into earnings	0	(3)	6	3
Derivatives not designated as hedging instruments:
Derivative [Line Items]
Pretax gain (loss) on derivatives recognized in earnings	(19)	(222)	571	(460)
Derivatives not designated as hedging instruments: | Commodity contracts not subject to rate recovery
Derivative [Line Items]
Pretax gain (loss) on derivatives recognized in earnings	83	(227)	785	(455)
Derivatives not designated as hedging instruments: | Commodity contracts subject to rate recovery | Southern California Gas Company
Derivative [Line Items]
Pretax gain (loss) on derivatives recognized in earnings	(125)	(11)	(172)	(15)
Derivatives not designated as hedging instruments: | Commodity contracts subject to rate recovery | San Diego Gas and Electric Company
Derivative [Line Items]
Pretax gain (loss) on derivatives recognized in earnings	23	16	5	10
Derivatives not designated as hedging instruments: | Contingent Interest Rate Derivative
Derivative [Line Items]
Pretax gain (loss) on derivatives recognized in earnings	0	0	(47)	0
Derivatives not designated as hedging instruments: | Cost of Electric Fuel and Purchased Power | Commodity contracts subject to rate recovery
Derivative [Line Items]
Pretax gain (loss) on derivatives recognized in earnings	23	16	5	10
Derivatives not designated as hedging instruments: | Cost of Natural Gas | Commodity contracts subject to rate recovery
Derivative [Line Items]
Pretax gain (loss) on derivatives recognized in earnings	$ (125)	$ (11)	$ (172)	$ (15)