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Commitments and Contingencies (Schedule of Expected Insurance Recoveries) (Details) - 2017/2018 Wildfire/Mudslide Event - USD ($) $ in Millions | 9 Months Ended | 31 Months Ended
--- | --- | ---
Sep. 30, 2020 | Jun. 30, 2020
Movement in Loss Contingency Receivable, Increase (Decrease) [Roll Forward] |  |
Ending balance | $ 1,600 |
Southern California Edison |  |
Movement in Loss Contingency Receivable, Increase (Decrease) [Roll Forward] |  |
Beginning balance | 1,710 |
Insurance recoveries | (73) | $ (363)
Ending balance | $ 1,637 |

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- Definition Carrying amount as of the balance sheet date of amounts expected to be recovered under the terms of insurance contracts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition The amount recovered from insurance. These recoveries reduce costs and losses that are reported as a separate line item under operating expenses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 + Details
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