COMMITMENTS AND CONTINGENCIES - LEASES BALANCE SHEET INFORMATION (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Lessee, Lease, Description [Line Items]
Right-of-use assets – operating leases	$ 723	$ 655
Finance leases, property plant and equipment	1,585	1,529
Finance leases, accumulated depreciation	$ (246)	$ (186)
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property, plant and equipment, net	Property, plant and equipment, net
Finance leases, property plant and equipment, net	$ 1,339	$ 1,343
Total ROU assets	$ 2,062	$ 1,998
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other current liabilities	Other current liabilities
Operating lease, other current liabilities	$ 70	$ 53
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Deferred credits and other	Deferred credits and other
Operating lease, deferred credits and other	$ 599	$ 528
Total lease liabilities	$ 669	$ 581
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Current portion of long-term debt and finance leases	Current portion of long-term debt and finance leases
Finance lease, current portion of long-term debt and finance leases	$ 64	$ 57
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Long-term debt	Long-term debt
Long-term debt and finance leases	$ 1,276	$ 1,286
Total finance leases	1,340	1,343
Total lease liabilities	$ 2,009	$ 1,924
Operating lease, weighted-average remaining lease term	13 years	14 years
Finance lease, weighted-average remaining lease term	15 years	16 years
Operating lease, weighted-average discount rate (as a percent)	6.64%	6.21%
Finance lease, weighted-average discount rate (as a percent)	13.80%	14.04%
Other Operating Leases
Lessee, Lease, Description [Line Items]
Operating lease, weighted-average discount rate (as a percent)	7.57%	6.81%
Purchased-Power Agreements
Lessee, Lease, Description [Line Items]
Operating lease, other current liabilities	$ 18	$ 8
Operating lease, deferred credits and other	$ 208	$ 118
Operating lease, weighted-average discount rate (as a percent)	4.19%	3.35%
SDG&E
Lessee, Lease, Description [Line Items]
Right-of-use assets – operating leases	$ 368	$ 281
Finance leases, property plant and equipment	1,412	1,395
Finance leases, accumulated depreciation	(179)	(140)
Finance leases, property plant and equipment, net	1,233	1,255
Total ROU assets	1,601	1,536
Operating lease, other current liabilities	50	32
Operating lease, deferred credits and other	325	249
Total lease liabilities	375	281
Finance lease, current portion of long-term debt and finance leases	41	39
Long-term debt and finance leases	1,192	1,217
Total finance leases	1,233	1,256
Total lease liabilities	$ 1,608	$ 1,537
Operating lease, weighted-average remaining lease term	10 years	11 years
Finance lease, weighted-average remaining lease term	16 years	17 years
Operating lease, weighted-average discount rate (as a percent)	4.52%	4.06%
Finance lease, weighted-average discount rate (as a percent)	14.18%	14.35%
SDG&E | Purchased-Power Agreements
Lessee, Lease, Description [Line Items]
Variable payments, due year one	$ 79
Variable payments, due year two	79
Variable payments, due year three	80
Variable payments, due year four	80
Variable payments, due year five	80
Variable payments, due thereafter	519
Operating lease, other current liabilities	18	$ 8
Operating lease, deferred credits and other	$ 208	$ 118
Operating lease, weighted-average discount rate (as a percent)	4.19%	3.35%
SoCalGas
Lessee, Lease, Description [Line Items]
Right-of-use assets – operating leases	$ 29	$ 42
Finance leases, property plant and equipment	173	133
Finance leases, accumulated depreciation	(66)	(46)
Finance leases, property plant and equipment, net	107	87
Total ROU assets	136	129
Operating lease, other current liabilities	10	11
Operating lease, deferred credits and other	18	29
Total lease liabilities	28	40
Finance lease, current portion of long-term debt and finance leases	23	18
Long-term debt and finance leases	84	69
Total finance leases	107	87
Total lease liabilities	$ 135	$ 127
Operating lease, weighted-average remaining lease term	3 years	4 years
Finance lease, weighted-average remaining lease term	6 years	6 years
Operating lease, weighted-average discount rate (as a percent)	4.54%	1.80%
Finance lease, weighted-average discount rate (as a percent)	4.94%	4.14%
SDG&E
Lessee, Lease, Description [Line Items]
Variable payments, due year one	$ 297
Variable payments, due year two	296
Variable payments, due year three	290
Variable payments, due year four	289
Variable payments, due year five	290
Variable payments, due thereafter	$ 2,200
SDG&E | Other Operating Leases
Lessee, Lease, Description [Line Items]
Operating lease, weighted-average discount rate (as a percent)	5.06%	4.63%
Maximum
Lessee, Lease, Description [Line Items]
Operating lease renewal period	25 years
Annual increase in rent, percent	7.00%
Minimum
Lessee, Lease, Description [Line Items]
Operating lease termination period	1 year
Annual increase in rent, percent	2.00%