DERIVATIVE FINANCIAL INSTRUMENTS - DERIVATIVE IMPACT ON INCOME (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Derivative [Line Items]
Pretax gain (loss) reclassified from AOCI into earnings	$ 101	$ 63	$ 6	$ 161
Pretax gain (loss) on derivatives recognized in earnings	(1)	(1)	$ 4	$ 5
Natural gas
Derivative [Line Items]
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]			Cost of Goods and Services Sold	Cost of Goods and Services Sold
Electric fuel and purchased power
Derivative [Line Items]
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]			Cost of Goods and Services Sold	Cost of Goods and Services Sold
Commodity contracts not subject to rate recovery
Derivative [Line Items]
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]			Unregulated Operating Revenue	Unregulated Operating Revenue
Contingent Interest Rate Derivative
Derivative [Line Items]
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]			INTEREST EXPENSE	INTEREST EXPENSE
Derivatives designated as hedging instruments: | Cash Flow Hedging
Derivative [Line Items]
Pretax gain (loss) recognized in OCI	132	67	$ 34	$ 187
Pretax gain (loss) reclassified from AOCI into earnings	13	(12)	24	(17)
Derivatives designated as hedging instruments: | Interest Expense | Cash Flow Hedging | Interest rate instruments
Derivative [Line Items]
Pretax gain (loss) recognized in OCI	94	13	17	35
Pretax gain (loss) reclassified from AOCI into earnings	0	0	0	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	0	0
Pretax gain (loss) reclassified from AOCI into earnings	(1)	(1)	(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	0	4	7	13
Pretax gain (loss) reclassified from AOCI into earnings	1	1	1	1
Derivatives designated as hedging instruments: | Equity Earnings | Cash Flow Hedging | Interest rate instruments
Derivative [Line Items]
Pretax gain (loss) recognized in OCI	41	50	24	144
Pretax gain (loss) reclassified from AOCI into earnings	14	(13)	21	(27)
Derivatives designated as hedging instruments: | Equity Earnings | Cash Flow Hedging | Foreign exchange instruments
Derivative [Line Items]
Pretax gain (loss) recognized in OCI	(1)	0	(6)	(2)
Pretax gain (loss) reclassified from AOCI into earnings	(1)	0	(2)	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)	0	(8)	(3)
Pretax gain (loss) reclassified from AOCI into earnings	0	1	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)	(1)	(2)	(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) reclassified from AOCI into earnings			6	6
Derivatives not designated as hedging instruments:
Derivative [Line Items]
Pretax gain (loss) on derivatives recognized in earnings	206	(179)	590	(238)
Derivatives not designated as hedging instruments: | Commodity contracts not subject to rate recovery
Derivative [Line Items]
Pretax gain (loss) on derivatives recognized in earnings	253	(151)	702	(228)
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	(20)	(4)	(47)	(4)
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	(27)	(24)	(18)	(6)
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	(27)	(24)	(18)	(6)
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	$ (20)	$ (4)	$ (47)	$ (4)