Commitments and Contingencies (Wildfire loss accrual) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Mar. 31, 2022	Dec. 31, 2021
Loss Contingency Accrual [Roll Forward]
Wildfire-related claims, current	$ 137	$ 131
Wildfire-related claims, non-current	1,531	1,733
2017/2018 Wildfire/Mudslide Events
Loss Contingency Accrual [Roll Forward]
Beginning balance	1,734
Increase in accrued estimated losses to reflect best estimate	416
Amounts paid	(717)
Ending balance	1,433	1,734
Wildfire-related claims, non-current	1,296	1,603
Other Wildfire Related Claims
Loss Contingency Accrual [Roll Forward]
Wildfire-related claims, non-current	235	130
SCE
Loss Contingency Accrual [Roll Forward]
Wildfire-related claims, current	137	131
Wildfire-related claims, non-current	$ 1,531	$ 1,733

Amount of loss contingency liability.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349

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