REVENUES - CONTRACT LIABILITIES (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Contract with Customer, Liability [Roll Forward]
Contract liabilities, opening balance	$ (278)	$ (207)
Revenue from performance obligations satisfied during reporting period	129	36
Payments received in advance	(105)	(1)
Contract liabilities, closing balance	(254)	(172)
Other Current Liabilities
Contract with Customer, Liability [Roll Forward]
Contract liabilities, closing balance	(46)
Deferred Credits and Other
Contract with Customer, Liability [Roll Forward]
Contract liabilities, closing balance	(208)
San Diego Gas and Electric Company
Contract with Customer, Liability [Roll Forward]
Contract liabilities, opening balance	(83)	(87)
Revenue from performance obligations satisfied during reporting period	3	3
Contract liabilities, closing balance	(80)	$ (84)
San Diego Gas and Electric Company | Other Current Liabilities
Contract with Customer, Liability [Roll Forward]
Contract liabilities, closing balance	(4)
San Diego Gas and Electric Company | Deferred Credits and Other
Contract with Customer, Liability [Roll Forward]
Contract liabilities, closing balance	$ (76)