COMMITMENTS AND CONTINGENCIES - LEASE INFORMATION NARRATIVE (Details) $ in Millions	9 Months Ended
	Sep. 30, 2024 USD ($) agreement	Dec. 31, 2023 USD ($)	[1]
Lessee, Lease, Description [Line Items]
Right-of-use assets – operating leases	$ 888	$ 723
SDG&E
Lessee, Lease, Description [Line Items]
Right-of-use assets – operating leases	$ 542	368
SDG&E | Purchased-Power Contracts
Lessee, Lease, Description [Line Items]
Number of purchased-power contracts | agreement	6
Number of purchase power contracts to be commenced the remainder of the year | agreement	2
Number of purchase power contracts to be commenced in year one | agreement	2
Number of purchase power contracts to be commenced in year two | agreement	2
Future minimum lease payments due remainder of the year	$ 5
Future minimum lease payments due year one	41
Future minimum lease payments due year two	67
Future minimum lease payments due year three	68
Future minimum lease payments due year four	68
Future minimum lease payments due after year four	777
SDG&E | Energy Storage Tolling Agreements
Lessee, Lease, Description [Line Items]
Future minimum lease payments due remainder of the year	4
Future minimum lease payments due year one	23
Future minimum lease payments due year two	23
Future minimum lease payments due year three	23
Future minimum lease payments due year four	23
Future minimum lease payments due after year four	182
Right-of-use assets – operating leases	202
Operating Lease, Liability	202
Sempra Infrastructure | Tugboat Lease Agreement
Lessee, Lease, Description [Line Items]
Future minimum lease payments due year three	10
Future minimum lease payments due year four	12
Future minimum lease payments due after year four	210
Future minimum fixed payments	184
SoCalGas
Lessee, Lease, Description [Line Items]
Right-of-use assets – operating leases	20	$ 29
SoCalGas | Headquarters Lease Agreement
Lessee, Lease, Description [Line Items]
Future minimum lease payments due year four	8
Future minimum lease payments due after year four	143
Prepaid Expense	$ 1

[1] Derived from audited financial statements.