Derivative Instruments - Narrative (Details) - SCE - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Derivatives
Cash collateral and related accruals	$ 60	$ 105
Commodity
Derivatives
Cash collateral and related accruals	0	0
Derivative additional collateral amount	0	3
Cash collateral posted for liability	85	66
Cash collateral posted	45	57
Commodity \| Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssetsCurrent
Derivatives
Cash collateral not offset against liability	40	9
Commodity \| Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherLiabilitiesCurrent
Derivatives
Cash collateral posted	$ 45	$ 57

Amount of obligation to return cash collateral under master netting arrangements offset against derivative assets.

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Amount of obligation to return cash collateral under master netting arrangements that have not been offset against derivative assets.

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Amount of right to receive cash collateral under master netting arrangements that have not been offset against derivative liabilities.

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Fair value of securities pledged as collateral against derivative liabilities.

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