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Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and elected not to be offset.

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Amount of unrealized gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3) and still held.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of unrealized gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3) and still held.

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Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3).

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Amount of settlement of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3).

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Amount of settlements of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of unrealized gain (loss) recognized in income for derivative asset (liability) after deduction of derivative liability (asset), measured at fair value using unobservable input (level 3) and still held.

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Amount of gain (loss) recognized in income from derivative asset (liability) after deduction of derivative liability (asset), measured at fair value on recurring basis using unobservable input (level 3).

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FAIR VALUE MEASUREMENTS - RECON OF LEVEL 3 ASSETS (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2026 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2026 USD ($) $ / MWh	Sep. 30, 2025 USD ($) $ / MWh	Dec. 31, 2025 USD ($)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning balance	$ 13	$ 3	$ 10	$ 4
Realized and unrealized gains (losses), net	(3)	3	(4)	1
Allocated transmission instruments	4	2	10	5
Settlements	1	(2)	(1)	(4)
Ending balance	15	6	15	6
Change in unrealized gains (losses) relating to instruments still held at September 30	(2)	2	(3)	(1)
Commodity contracts not subject to rate recovery
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	17		(55)
Realized and unrealized gains (losses), net	58		159
Settlements	(8)		(37)
Ending balance	67		67
Change in unrealized gains (losses) relating to instruments still held at September 30	58		159
Other Sempra
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	38	39	41	25
Realized and unrealized gains (losses), net	1	2	2	20
Settlements	(2)	(2)	(6)	(6)
Ending balance	37	39	37	39
Change in unrealized gains (losses) relating to instruments still held at September 30	1	2	2	20
Other Sempra \| Balance Sheet Location [Axis]: us-gaap:OtherAssetsCurrent
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Ending balance	8		8
Other Sempra \| Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Ending balance	29		29
San Diego Gas and Electric Company
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning balance	13	3	10	4
Realized and unrealized gains (losses), net	(3)	3	(4)	1
Allocated transmission instruments	4	2	10	5
Settlements	1	(2)	(1)	(4)
Ending balance	15	6	15	6
Change in unrealized gains (losses) relating to instruments still held at September 30	(2)	$ 2	(3)	$ (1)
Level 3 \| Disposal Group Held-for-sale
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Derivative liability, before netting	1		1		$ 56
Level 3 \| Commodity contracts not subject to rate recovery \| Disposal Group Held-for-sale
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Derivative asset, before netting	68		68		1
Derivative liability, before netting	$ 1		$ 1		$ 56
Level 3 \| San Diego Gas and Electric Company \| Minimum
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Congestion revenue rights (in dollars per MWH) \| $ / MWh			(0.31)	(7.38)
Level 3 \| San Diego Gas and Electric Company \| Maximum
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Congestion revenue rights (in dollars per MWH) \| $ / MWh			13.76	15.54
Level 3 \| San Diego Gas and Electric Company \| Weighted Average
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Congestion revenue rights (in dollars per MWH) \| $ / MWh			4.05	0.01