REVENUES - CONTRACT LIABILITIES (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025
Contract with Customer, Liability [Roll Forward]
Contract liabilities, opening balance	$ (68)	$ (196)
Revenue from performance obligations satisfied during reporting period	2	55
Payments received in advance	0	(1)
Contract liabilities, closing balance	(66)	(142)
Balance Sheet Location [Axis]: us-gaap:DeferredCreditsAndOtherLiabilities
Contract with Customer, Liability [Roll Forward]
Contract liabilities, closing balance	(62)
Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesCurrent
Contract with Customer, Liability [Roll Forward]
Contract liabilities, closing balance	(4)
SDG&E
Contract with Customer, Liability [Roll Forward]
Contract liabilities, opening balance	(68)	(72)
Revenue from performance obligations satisfied during reporting period	2	2
Contract liabilities, closing balance	(66)	$ (70)
SDG&E \| Balance Sheet Location [Axis]: us-gaap:DeferredCreditsAndOtherLiabilities
Contract with Customer, Liability [Roll Forward]
Contract liabilities, closing balance	(62)
SDG&E \| Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesCurrent
Contract with Customer, Liability [Roll Forward]
Contract liabilities, closing balance	$ (4)