REVENUES - CONTRACT LIABILITIES (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Contract with Customer, Liability [Roll Forward]
Beginning balance	$ (252)	$ (278)	$ (207)
Revenue from performance obligations satisfied during reporting period	14	131	52
Payments received in advance	(21)	(105)	(123)
Contract modification	61	0	0
Ending balance	(198)	(252)	(278)
Other Current Liabilities
Contract with Customer, Liability [Roll Forward]
Beginning balance	(45)	(116)
Ending balance	(5)	(45)	(116)
Deferred Credits and Other
Contract with Customer, Liability [Roll Forward]
Beginning balance	(207)	(162)
Ending balance	(193)	(207)	(162)
SDG&E
Contract with Customer, Liability [Roll Forward]
Beginning balance	(79)	(83)	(87)
Revenue from performance obligations satisfied during reporting period	4	4	4
Ending balance	(75)	(79)	(83)
SDG&E | Other Current Liabilities
Contract with Customer, Liability [Roll Forward]
Beginning balance	(4)	(4)
Ending balance	(3)	(4)	(4)
SDG&E | Deferred Credits and Other
Contract with Customer, Liability [Roll Forward]
Beginning balance	(75)	(79)
Ending balance	$ (72)	$ (75)	$ (79)