COMMITMENTS, CONTINGENCIES AND GUARANTEES - LEASE INFORMATION NARRATIVE (Details) $ in Millions	9 Months Ended
	Sep. 30, 2025 USD ($) agreement	Dec. 31, 2024 USD ($)
Lessee, Lease, Description [Line Items]
Right-of-use assets – operating leases	$ 1,219	$ 1,177	[1]
SDG&E
Lessee, Lease, Description [Line Items]
Right-of-use assets – operating leases	$ 1,061	795	[2]
SDG&E | Purchased-Power Contracts
Lessee, Lease, Description [Line Items]
Lessee, Number Of Purchased-Power Contracts | agreement	2
Right-of-use assets – operating leases	$ 291
Operating lease liability	291
Lease payments, remainder of fiscal year	12
Lease payments, year one	29
Lease payments, year two	29
Lease payments, year three	29
Lease payments, year four	29
Lease payments, after year four	$ 303
Number of purchased-power contracts, to be commenced | agreement	2
Number of purchase power contracts to be commenced in year two | agreement	1
Number of purchase power contracts to be commenced in year three | agreement	1
Future minimum lease payments due year three	$ 4
Future minimum lease payments due year four	5
Future minimum lease payments due after year four	71
SoCalGas
Lessee, Lease, Description [Line Items]
Right-of-use assets – operating leases	9	$ 18	[3]
SoCalGas | Building
Lessee, Lease, Description [Line Items]
Increase (Decrease) In Unrecorded Unconditional Purchase Obligation, to be Paid, Year Three	(3)
Increase in future minimum lease payments due year four	3
Increase in future minimum lease payments due after year four	$ 38

[1] Derived from audited financial statements.

[2] Derived from audited financial statements.

[3] Derived from audited financial statements.