COMMITMENTS AND CONTINGENCIES - LEASE INCOME STATEMENT INFORMATION (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Lessee, Lease, Description [Line Items]
Operating lease costs	$ 99	$ 83	$ 89
Amortization of ROU assets	60	48	39
Interest on lease liabilities	182	184	186
Total finance lease costs	242	232	225
Short-term lease costs	9	3	7
Variable lease costs	458	411	432
Total lease costs	808	729	753
Purchased-Power Agreements
Lessee, Lease, Description [Line Items]
Operating lease costs	21	10	1
Depreciation and Amortization Expense
Lessee, Lease, Description [Line Items]
Amortization of ROU assets	29	25	22
SDG&E
Lessee, Lease, Description [Line Items]
Operating lease costs	53	45	32
Amortization of ROU assets	40	33	27
Interest on lease liabilities	177	181	184
Total finance lease costs	217	214	211
Short-term lease costs	8	2	1
Variable lease costs	447	399	422
Total lease costs	725	660	666
SDG&E | Purchased-Power Agreements
Lessee, Lease, Description [Line Items]
Operating lease costs	21	10	1
SDG&E | Depreciation and Amortization Expense
Lessee, Lease, Description [Line Items]
Amortization of ROU assets	28	24	21
SoCalGas
Lessee, Lease, Description [Line Items]
Operating lease costs	13	18	20
Amortization of ROU assets	20	15	12
Interest on lease liabilities	5	2	2
Total finance lease costs	25	17	14
Short-term lease costs	0	0	0
Variable lease costs	10	11	10
Total lease costs	48	46	44
SoCalGas | Depreciation and Amortization Expense
Lessee, Lease, Description [Line Items]
Amortization of ROU assets	$ 1	$ 1	$ 1