Income Taxes (Rate Reconciliation) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Tax Disclosure [Line Items]
Statutory tax rate (as a percent)			21.00%
(Loss) income from operations before income taxes	$ (261)	$ (326)	$ 119	$ 357
Provision for income tax at federal statutory rate of 21%	(55)	(68)	25	75
Increase (decrease) in income tax from
State tax, net of federal benefit	(58)	(39)	(79)	(28)
Property-related	(79)	(33)	(172)	(159)
Average rate assumption method ("ARAM") adjustment		87		87
Insurance benefits	(2)	(2)	(6)	(7)
Wildfire related charges		31		31
Other	7	(5)	(3)	4
Total income tax expense (benefit)	$ (187)	$ (29)	$ (235)	$ 3
Effective tax rate (as a percent)	(71.60%)	(8.90%)	(197.50%)	0.80%
Capistrano Wind
Increase (decrease) in income tax from
Increase (decrease) to previously recorded tax expense	$ (125)
SCE
Income Tax Disclosure [Line Items]
Statutory tax rate (as a percent)			21.00%
(Loss) income from operations before income taxes	(230)	$ (268)	$ 252	$ 492
Provision for income tax at federal statutory rate of 21%	(48)	(56)	53	103
Increase (decrease) in income tax from
State tax, net of federal benefit	(53)	(32)	(66)	(17)
Property-related	(79)	(33)	(172)	(159)
Average rate assumption method ("ARAM") adjustment		87		87
Insurance benefits	(2)	(2)	(6)	(7)
Wildfire related charges		31		31
Other	5	(6)	(4)	3
Total income tax expense (benefit)	$ (177)	$ (11)	$ (195)	$ 41
Effective tax rate (as a percent)	(77.00%)	(4.10%)	(77.40%)	8.30%
Revenue adjustment		$ 0

Amount of impact on earnings of offsetting revenue adjustment of cumulative true up.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to insurance benefits.

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Income Tax Disclosures [Line Items]

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Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of increase (decrease) to previously recorded tax expense. Includes, but is not limited to, significant settlements of income tax disputes, and unusual tax positions or infrequent actions taken by the entity, including tax assessment reversal, and IRS tax settlement.

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