INCOME TAXES - UNRECOGNIZED TAX BENEFITS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reconciliation of Unrecognized Tax Benefits
Beginning balance	$ 304	$ 99	$ 93
Increase in prior period tax positions	16	3	3
Decrease in prior period tax positions	(2)	(2)	(1)
Increase in current period tax positions	4	204	4
Settlements with tax authorities	(43)	0	0
Expiration of statutes of limitations	(1)	0	0
Ending balance	278	304	99
Of the total, amounts related to tax positions that, if recognized, in future years, would decrease the effective tax rate	(117)	(105)	(87)
Of the total, amounts related to tax positions that, if recognized, in future years, would increase the effective tax rate	38	34	31
San Diego Gas and Electric Company
Reconciliation of Unrecognized Tax Benefits
Beginning balance	14	13	12
Increase in prior period tax positions	0	1	1
Ending balance	14	14	13
Of the total, amounts related to tax positions that, if recognized, in future years, would decrease the effective tax rate	(11)	(11)	(10)
Of the total, amounts related to tax positions that, if recognized, in future years, would increase the effective tax rate	1	1	1
SoCalGas
Reconciliation of Unrecognized Tax Benefits
Beginning balance	72	68	64
Increase in prior period tax positions	1	1	1
Increase in current period tax positions	4	3	3
Ending balance	77	72	68
Of the total, amounts related to tax positions that, if recognized, in future years, would decrease the effective tax rate	(67)	(63)	(59)
Of the total, amounts related to tax positions that, if recognized, in future years, would increase the effective tax rate	$ 37	$ 33	$ 30