DERIVATIVE FINANCIAL INSTRUMENTS - DERIVATIVE IMPACT ON INCOME (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Derivative [Line Items]
Pretax gain (loss) reclassified from AOCI into earnings	$ 4	$ (37)
Pretax [(loss) gain] on derivatives recognized in earnings	9	0
Derivatives designated as hedging instruments:
Derivative [Line Items]
Pretax gain (loss) recognized in OCI	11	(41)
Pretax gain (loss) reclassified from AOCI into earnings	6	3
Derivatives designated as hedging instruments: | Interest expense | Cash Flow Hedging | Interest rate instruments
Derivative [Line Items]
Pretax gain (loss) recognized in OCI	2	(3)
Pretax gain (loss) reclassified from AOCI into earnings	1	2
Derivatives designated as hedging instruments: | Equity earnings | Cash Flow Hedging | Interest rate instruments
Derivative [Line Items]
Pretax gain (loss) recognized in OCI	7	(20)
Pretax gain (loss) reclassified from AOCI into earnings	1	5
Derivatives designated as hedging instruments: | Equity earnings | Cash Flow Hedging | Foreign exchange instruments
Derivative [Line Items]
Pretax gain (loss) recognized in OCI	2	(4)
Pretax gain (loss) reclassified from AOCI into earnings	2	(2)
Derivatives designated as hedging instruments: | Equity earnings | Fair Value Hedging | Foreign exchange instruments
Derivative [Line Items]
Pretax gain (loss) recognized in OCI	(2)	(9)
Pretax gain (loss) reclassified from AOCI into earnings	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	2	(5)
Pretax gain (loss) reclassified from AOCI into earnings	2	(2)
Derivatives not designated as hedging instruments:
Derivative [Line Items]
Pretax [(loss) gain] on derivatives recognized in earnings	92	(72)
Derivatives not designated as hedging instruments: | Interest rate instruments
Derivative [Line Items]
Pretax [(loss) gain] on derivatives recognized in earnings	$ 11	$ (65)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Interest Expense, Nonoperating	Interest Expense, Nonoperating
Derivatives not designated as hedging instruments: | Foreign exchange instruments
Derivative [Line Items]
Pretax [(loss) gain] on derivatives recognized in earnings	$ 9	$ 0
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other income, net	Other income, net
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	$ (5)	$ 3
Derivatives not designated as hedging instruments: | Commodity contracts subject to rate recovery | SoCalGas
Derivative [Line Items]
Pretax [(loss) gain] on derivatives recognized in earnings	(1)	(16)
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	$ 100	$ 6
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	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	$ (22)	$ 0
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	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	$ (1)	$ (16)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	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	$ (5)	$ 3
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Cost of Product and Service Sold	Cost of Product and Service Sold