REVENUES - CONTRACT LIABILITIES (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Contract with Customer, Liability [Roll Forward]
Beginning balance	$ (278)	$ (207)	$ (163)
Revenue from performance obligations satisfied during reporting period	131	52	4
Payments received in advance	(105)	(123)	(48)
Ending balance	(252)	(278)	(207)
Other Current Liabilities
Contract with Customer, Liability [Roll Forward]
Beginning balance	(116)	(52)
Ending balance	(45)	(116)	(52)
Deferred Credits and Other
Contract with Customer, Liability [Roll Forward]
Beginning balance	(162)	(155)
Ending balance	(207)	(162)	(155)
San Diego Gas and Electric Company
Contract with Customer, Liability [Roll Forward]
Beginning balance	(83)	(87)	(91)
Revenue from performance obligations satisfied during reporting period	4	4	4
Ending balance	(79)	(83)	(87)
San Diego Gas and Electric Company | Other Current Liabilities
Contract with Customer, Liability [Roll Forward]
Beginning balance	(4)	(4)
Ending balance	(4)	(4)	(4)
San Diego Gas and Electric Company | Deferred Credits and Other
Contract with Customer, Liability [Roll Forward]
Beginning balance	(79)	(83)
Ending balance	$ (75)	$ (79)	$ (83)