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Related-Party Transactions (Details) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Nov. 30, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Related Party Transaction [Line Items] |  |  |  |
Wildfire insurance expense |  | $ 450 | $ 450 |
SCE |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Insurance receivable due from affiliates |  |  | 268 |
Wildfire insurance expense |  | 425 |  |
SCE | Wildfire liability insurance | Wholly-owned subsidiary |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Wildfire-related insurance premiums | $ 25 | 185 | 176 | $ 260
Insurance purchased but not reinsured | $ 24 |  |  |
Nonadmitted insurance tax (as a percent) | 3.00% |  |  |
Insurance receivable due from affiliates |  |  | 268 |
Prepaid Insurance |  | 52 | 56 |
Wildfire insurance expense |  | $ 192 | $ 189 | $ 173

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- Definition The after tax amount of premium of the insurance contract that was not reinsured under related party transactions. + References No definition available. + Details
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- Definition Amount of receivables due from an entity that is affiliated with the reporting entity by means of direct or indirect ownership, due within 1 year (or 1 business cycle). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=124433192&loc=d3e56071-112765 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3(a)(2)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39599-107864 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 + Details
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- Definition Amount of asset related to consideration paid in advance for insurance that provides economic benefits within a future period of one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6387103&loc=d3e6435-108320 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 10 -Section 05 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123349782&loc=d3e5879-108316 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (g)(1) -URI http://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=124098289&loc=d3e6787-107765 + Details
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