DERIVATIVE FINANCIAL INSTRUMENTS - DERIVATIVE IMPACT ON INCOME (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Derivative [Line Items]
Pretax gain (loss) reclassified from AOCI into earnings	$ (14)	$ (225)	$ (91)	$ (24)
Pretax (loss) gain on derivatives recognized in earnings	(1)	1	(2)	2
Derivatives designated as hedging instruments:
Derivative [Line Items]
Pretax gain (loss) recognized in OCI	(11)	(235)	(94)	13
Pretax gain (loss) reclassified from AOCI into earnings	4	10	7	41
Derivatives designated as hedging instruments: | Interest expense | Cash Flow Hedging | Interest rate instruments
Derivative [Line Items]
Pretax gain (loss) recognized in OCI	2	(203)	(4)	5
Pretax gain (loss) reclassified from AOCI into earnings	4	3	6	9
Derivatives designated as hedging instruments: | Interest expense | Cash Flow Hedging | Interest rate instruments | SoCalGas
Derivative [Line Items]
Pretax gain (loss) recognized in OCI	0	0	0	0
Pretax gain (loss) reclassified from AOCI into earnings	(1)	0	(1)	(1)
Derivatives designated as hedging instruments: | Equity earnings | Cash Flow Hedging | Interest rate instruments
Derivative [Line Items]
Pretax gain (loss) recognized in OCI	(6)	(33)	(39)	(8)
Pretax gain (loss) reclassified from AOCI into earnings	6	5	10	20
Derivatives designated as hedging instruments: | Equity earnings | Cash Flow Hedging | Foreign exchange instruments
Derivative [Line Items]
Pretax gain (loss) recognized in OCI	(1)	2	(10)	12
Pretax gain (loss) reclassified from AOCI into earnings	(3)	1	(4)	5
Derivatives designated as hedging instruments: | Equity earnings | Fair Value Hedging | Foreign exchange instruments
Derivative [Line Items]
Pretax gain (loss) recognized in OCI	(5)	(3)	(30)	(10)
Pretax gain (loss) reclassified from AOCI into earnings	0	0	0	0
Derivatives designated as hedging instruments: | Revenues: Energy- related businesses | Cash Flow Hedging | Foreign exchange instruments
Derivative [Line Items]
Pretax gain (loss) recognized in OCI	(1)	0	(11)	14
Pretax gain (loss) reclassified from AOCI into earnings	(2)	0	(3)	5
Derivatives designated as hedging instruments: | Other income, net | Cash Flow Hedging | Foreign exchange instruments
Derivative [Line Items]
Pretax gain (loss) recognized in OCI	0	2
Pretax gain (loss) reclassified from AOCI into earnings	(1)	1	(2)	2
Derivatives not designated as hedging instruments:
Derivative [Line Items]
Pretax (loss) gain on derivatives recognized in earnings	(134)	72	(169)	146
Derivatives not designated as hedging instruments: | Interest rate instruments
Derivative [Line Items]
Pretax (loss) gain on derivatives recognized in earnings	$ (2)	$ 0	$ (58)	$ 0
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Interest Expense, Nonoperating	Interest Expense, Nonoperating	Interest Expense, Nonoperating	Interest Expense, Nonoperating
Derivatives not designated as hedging instruments: | Commodity contracts subject to rate recovery | SDG&E
Derivative [Line Items]
Pretax (loss) gain on derivatives recognized in earnings	$ (7)	$ (10)	$ (3)	$ (29)
Derivatives not designated as hedging instruments: | Commodity contracts subject to rate recovery | SoCalGas
Derivative [Line Items]
Pretax (loss) gain on derivatives recognized in earnings	(91)	(16)	(111)	(43)
Derivatives not designated as hedging instruments: | Revenues: Energy- related businesses | Commodity contracts not subject to rate recovery
Derivative [Line Items]
Pretax (loss) gain on derivatives recognized in earnings	$ (35)	$ 98	$ 4	$ 218
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Unregulated Operating Revenue	Unregulated Operating Revenue	Unregulated Operating Revenue	Unregulated Operating Revenue
Derivatives not designated as hedging instruments: | Energy-related businesses cost of sales | Commodity contracts not subject to rate recovery
Derivative [Line Items]
Pretax (loss) gain on derivatives recognized in earnings	$ 1	$ 0	$ (1)	$ 0
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Cost of Product and Service Sold	Cost of Product and Service Sold	Cost of Product and Service Sold	Cost of Product and Service Sold
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	$ (91)	$ (16)	$ (111)	$ (43)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Cost of Product and Service Sold	Cost of Product and Service Sold	Cost of Product and Service Sold	Cost of Product and Service Sold
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	$ (7)	$ (10)	$ (3)	$ (29)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Cost of Product and Service Sold	Cost of Product and Service Sold	Cost of Product and Service Sold	Cost of Product and Service Sold