COMMITMENTS AND CONTINGENCIES - LEASE INFORMATION (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021	[1]
Lessee, Lease, Description [Line Items]
Right-of-use assets – operating leases	$ 665	$ 665		$ 665		$ 594
Total revenues from sales-type leases		0	$ 16	0	$ 16
Interest income		2	2	6	2
Total revenues from sales-type leases		2	18	6	18
Fixed lease payments		71	80	211	192
Variable lease payments		3	2	7	3
Total revenues from operating leases		74	82	218	195
Depreciation expense		14	$ 13	41	$ 35
San Diego Gas and Electric Company
Lessee, Lease, Description [Line Items]
Right-of-use assets – operating leases	284	284		284		185
Lease not yet commenced, remainder of year				1
Lease not yet commenced, year one				14
Lease not yet commenced, year two				14
Lease not yet commenced, year three				14
Lease not yet commenced, year four				14
Lease not yet commenced, thereafter				87
San Diego Gas and Electric Company | Corporate Facility
Lessee, Lease, Description [Line Items]
Increase in right-of-use assets	59	59		59
Increase in operating lease liabilities	59
Increase (decrease) in lease payments, year one	(9)	(9)		(9)
Increase (decrease) in lease payments, year three	10	10		10
Increase (decrease) in lease payments, year four	10	10		10
Increase (decrease) in lease payments, after year four	80	80		80
San Diego Gas and Electric Company | Energy Storage Agreement
Lessee, Lease, Description [Line Items]
Total lease liabilities	28	28		28
Right-of-use assets – operating leases	28	28		28
Undiscounted operating lease payments, 2022	1	1		1
Undiscounted operating lease payments, 2023	4	4		4
Undiscounted operating lease payments, 2024	4	4		4
Undiscounted operating lease payments, 2025	4	4		4
Undiscounted operating lease payments, 2026	4	4		4
Undiscounted operating lease payments, due after 2026	18	18		18
Southern California Gas Company
Lessee, Lease, Description [Line Items]
Right-of-use assets – operating leases	$ 45	$ 45		45		$ 57
Finance lease not yet commenced, year one				2
Finance lease not yet commenced, year two				2
Finance lease not yet commenced, year three				2
Finance lease not yet commenced, year four				2
Finance lease not yet commenced, year thereafter				$ 10

[1] Derived from audited financial statements.