Derivative Instruments - Summarizes the Gross and Net Fair Values (Details) - SCE - Commodity Contract - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Derivative Assets
Gross amounts recognized	$ 164	$ 213
Gross amounts offset in the condensed consolidated balance sheets	(9)	(1)
Cash collateral posted	0	0
Net amounts presented in the condensed consolidated balance sheets	155	212
Derivative Liabilities
Gross amounts recognized	22	47
Gross amounts offset in the condensed consolidated balance sheets	(9)	(1)
Cash collateral posted	(13)	(46)
Net amounts presented in the condensed consolidated balance sheets	0	0
Cash collateral posted for liability	43	74
Other Current Liabilities
Derivative Liabilities
Cash collateral posted	(13)	(46)
Other Current Assets
Derivative Liabilities
Cash collateral not offset against liability	$ 30	$ 28

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

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