Derivative Instruments - Schedule of Gross and Net Fair Values of Commodity Derivative Instruments (Details) - SCE - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Derivative Assets Short-Term
Cash collateral and related accruals	$ 60	$ 105
Net amounts presented on the condensed consolidated balance sheets	15	48
Derivative Liabilities Short-Term
Net amounts presented on the condensed consolidated balance sheets	0	0
Commodity
Derivative Assets Short-Term
Gross amounts recognized	16	48
Gross amounts offset on the condensed consolidated balance sheets	(1)
Cash collateral and related accruals	0	0
Net amounts presented on the condensed consolidated balance sheets	15	48
Derivative Liabilities Short-Term
Gross amounts recognized	46	57
Gross amounts offset on the condensed consolidated balance sheets	(1)
Cash collateral and related accruals	(45)	(57)
Net amounts presented on the condensed consolidated balance sheets	$ 0	$ 0

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

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