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Debt and Credit Agreements (Textual) (Details) | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2020 USD ($) | Dec. 31, 2020 USD ($) | Jan. 31, 2021 USD ($)
Debt Instrument [Line Items] |  |  |
Debt covenant capitalization ratio |  | 0.70 |
Actual debt to capitalization ratio |  | 0.59 |
SCE |  |  |
Debt Instrument [Line Items] |  |  |
Debt covenant capitalization ratio |  | 0.65 |
Actual debt to capitalization ratio |  | 0.51 |
SCE | Mortgages |  |  |
Debt Instrument [Line Items] |  |  |
Debt, face amount |  | $ 900,000,000 |
SCE | LIBOR | Mortgages |  |  |
Debt Instrument [Line Items] |  |  |
Basis spread on variable rate |  | 0.27% |
SCE | March 2020 term loan agreement | Revolving Credit Facility |  |  |
Debt Instrument [Line Items] |  |  |
Drawn against the revolving credit facility | $ 800,000,000 |  |
SCE | March 2020 term loan agreement | Revolving Credit Facility | LIBOR |  |  |
Debt Instrument [Line Items] |  |  |
Basis spread on variable rate | 1.125% | 0.65% |
SCE | 2.95% First and Refunding Mortgage Bonds Due in 2051 | Mortgages | Subsequent event |  |  |
Debt Instrument [Line Items] |  |  |
Debt, face amount |  |  | $ 750,000,000
Interest rate on debt (as a percent) |  |  | 2.95%
SCE | 2.25% First and Refunding Mortgage Bonds Due in 2030 | Mortgages | Subsequent event |  |  |
Debt Instrument [Line Items] |  |  |
Debt, face amount |  |  | $ 150,000,000
Interest rate on debt (as a percent) |  |  | 2.25%

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- Definition Debt Instrument, Covenant, Ratio of Debt to Total Capitalization + References No definition available. + Details
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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + 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 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Fair value of the amount outstanding under the credit facility. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611 + Details
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