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Leases (Textual) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
SCE |  |
Lessee, Lease, Description [Line Items] |  |
Lease income | $ 17 | $ 18
SCE | Maximum |  |
Lessee, Lease, Description [Line Items] |  |
Term of contract | 65 years |
SCE | PPA Operating Leases | Minimum |  |
Lessee, Lease, Description [Line Items] |  |
Lease term | 3 years |
SCE | PPA Operating Leases | Maximum |  |
Lessee, Lease, Description [Line Items] |  |
Lease term | 20 years |
SCE | Office Leases | Minimum |  |
Lessee, Lease, Description [Line Items] |  |
Lease term | 5 years |
SCE | Office Leases | Maximum |  |
Lessee, Lease, Description [Line Items] |  |
Lease term | 72 years |
SCE | Other Operating Leases | Minimum |  |
Lessee, Lease, Description [Line Items] |  |
Lease term | 5 years |
Term of contract | 15 years |
SCE | Other Operating Leases | Maximum |  |
Lessee, Lease, Description [Line Items] |  |
Lease term | 13 years |
EME | Affiliated Entity |  |
Lessee, Lease, Description [Line Items] |  |
Net proceeds | $ 132 |

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- Definition The net gain (loss) arising from the lessor's transactions involving the sale, transfer, or termination of financing agreements classified as capital leases. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 40 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=121566025&loc=d3e44901-112734 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918673-209980 + Details
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- Definition Term of lessor's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=121576215&loc=SL77919359-209981 + Details
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- Definition Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Includes, but is not limited to, variable lease payments not included in measurement of lease receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121576215&loc=SL77919372-209981 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=121561866&loc=SL77919311-209978 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 6A -URI http://asc.fasb.org/extlink&oid=121640914&loc=SL77927221-108306 + Details
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