Derivative Instruments (Balance Sheet) (Details) - SCE - Commodity derivative contracts - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Derivative Assets
Gross amounts recognized	$ 133	$ 459
Gross amounts offset in the consolidated balance sheets	(59)	(119)
Cash collateral received		(99)
Net amounts presented in the consolidated balance sheets	74	241
Derivative Liabilities
Gross amounts recognized	59	120
Gross amounts offset in the consolidated balance sheets	(59)	(119)
Cash collateral posted		0
Net amounts presented in the consolidated balance sheets	0	1
Cash collateral posted for liability	95
Net Asset
Gross amounts recognized	74	339
Gross amounts offset in the consolidated balance sheets	0	0
Netting and Collateral, Total		(99)
Net amounts presented in the consolidated balance sheets	74	240
Other Current Assets
Derivative Assets
Gross amounts recognized	133	459
Gross amounts offset in the consolidated balance sheets	(59)	(119)
Cash collateral received		(99)
Net amounts presented in the consolidated balance sheets	74	241
Other long-term assets
Derivative Assets
Gross amounts recognized	0
Gross amounts offset in the consolidated balance sheets	0	0
Cash collateral received		0
Net amounts presented in the consolidated balance sheets	0	0
Other Current Liabilities
Derivative Liabilities
Gross amounts recognized	59	120
Gross amounts offset in the consolidated balance sheets	(59)	(119)
Cash collateral posted		0
Net amounts presented in the consolidated balance sheets	0	1
Other long-term liabilities
Derivative Liabilities
Gross amounts recognized	0
Gross amounts offset in the consolidated balance sheets	0	0
Cash collateral posted		0
Net amounts presented in the consolidated balance sheets	$ 0	$ 0

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