REVENUES - CONTRACT LIABILITIES (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Contract with Customer, Liability [Roll Forward]
Contract liabilities, opening balance	$ (68)	$ (196)
Revenue from performance obligations satisfied during reporting period	1	28
Payments received in advance	0	(1)
Contract liabilities, closing balance	(67)	(169)
Other current liabilities
Contract with Customer, Liability [Roll Forward]
Contract liabilities, closing balance	(4)
Deferred Credits and Other
Contract with Customer, Liability [Roll Forward]
Contract liabilities, closing balance	(63)
SDG&E
Contract with Customer, Liability [Roll Forward]
Contract liabilities, opening balance	(68)	(72)
Revenue from performance obligations satisfied during reporting period	1	1
Contract liabilities, closing balance	(67)	$ (71)
SDG&E | Other current liabilities
Contract with Customer, Liability [Roll Forward]
Contract liabilities, closing balance	(4)
SDG&E | Deferred Credits and Other
Contract with Customer, Liability [Roll Forward]
Contract liabilities, closing balance	$ (63)