Derivative Instruments (Balance Sheet) (Details) - SCE - Commodity derivative contracts - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Derivative Assets
Gross amounts recognized	$ 63	$ 76
Gross amounts offset in the consolidated balance sheets	(31)	(32)
Cash collateral posted and accrued	0	0
Net amounts presented in the consolidated balance sheets	32	44
Derivative Liabilities
Gross amounts recognized	69	48
Gross amounts offset in the consolidated balance sheets	(31)	(32)
Cash collateral posted	(38)	(16)
Net amounts presented in the consolidated balance sheets	0	0
Cash collateral posted for liability	80	65
Net Asset
Gross amounts recognized	(6)	28
Gross amounts offset in the consolidated balance sheets	0	0
Netting and Collateral, Total	38	16
Net amounts presented in the consolidated balance sheets	32	44
Other Current Assets
Derivative Assets
Gross amounts recognized	59	70
Gross amounts offset in the consolidated balance sheets	(30)	(30)
Cash collateral posted and accrued	0	0
Net amounts presented in the consolidated balance sheets	29	40
Derivative Liabilities
Cash collateral posted for liability	42	49
Other long-term assets
Derivative Assets
Gross amounts recognized	4	6
Gross amounts offset in the consolidated balance sheets	(1)	(2)
Cash collateral posted and accrued	0	0
Net amounts presented in the consolidated balance sheets	3	4
Other Current Liabilities
Derivative Liabilities
Gross amounts recognized	68	46
Gross amounts offset in the consolidated balance sheets	(30)	(30)
Cash collateral posted	(38)	(16)
Net amounts presented in the consolidated balance sheets	0	0
Other long-term liabilities
Derivative Liabilities
Gross amounts recognized	1	2
Gross amounts offset in the consolidated balance sheets	(1)	(2)
Cash collateral posted	0	0
Net amounts presented in the consolidated balance sheets	0	0
Derivative
Derivative Liabilities
Cash collateral posted for liability	$ 38	$ 16

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