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Schedule I - Condensed Financial Information of Parent (Notes) (Details) $ / shares in Units, $ in Millions |  | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jan. 01, 2020 | Dec. 31, 2021 USD ($) $ / shares shares | Dec. 31, 2021 USD ($) $ / shares shares | Dec. 31, 2020 USD ($) shares | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Apr. 30, 2021 USD ($) | May 31, 2019 USD ($)
Debt and Credit Agreements |  |  |  |  |  |  |  |
Commitment |  | $ 4,850 | $ 4,850 |  |  |  |  |
Outstanding borrowings |  | (601) | (601) |  |  |  |  |
Amount available |  | $ 4,054 | 4,054 |  |  |  |  |
Equity |  |  |  |  |  |  |  |
Equity contribution |  |  | $ 900 |  |  |  |  |
Series A |  |  |  |  |  |  |  |
Equity |  |  |  |  |  |  |  |
Stock issued (in shares) | shares |  |  | 1,250,000 |  |  |  |  |
Preferred Stock, dividend rate, (as a percent) |  |  | 5.375% |  |  |  |  |
Margin rate for dividend rate reset (as a percent) |  | 4.698% | 4.698% |  |  |  |  |
Series B |  |  |  |  |  |  |  |
Equity |  |  |  |  |  |  |  |
Stock issued (in shares) | shares |  |  | 750,000 |  |  |  |  |
Preferred Stock, dividend rate, (as a percent) |  |  | 5.00% |  |  |  |  |
Margin rate for dividend rate reset (as a percent) |  | 3.901% | 3.901% |  |  |  |  |
Edison International |  |  |  |  |  |  |  |
Basis of Presentation |  |  |  |  |  |  |  |
Cash dividends received from consolidated subsidiaries |  |  | $ 975 | $ 1,300 | $ 400 |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |
Covenant debt to total capitalization ratio |  | 0.70 | 0.70 |  |  |  |  |
Actual debt to capitalization ratio |  | 0.61 | 0.61 |  |  |  |  |
Equity |  |  |  |  |  |  |  |
Proceeds received, net of offering costs |  |  | $ 2,000 |  |  |  |  |
Equity contribution |  |  | 900 |  |  |  |  |
Related Party Transactions |  |  |  |  |  |  |  |
Expenses from services provided by SCE |  |  | 2 | 2 | 2 |  |  |
Interest expense from loans due to affiliates |  |  | 5 | 4 | $ 5 |  |  |
Current receivables due from affiliates |  | $ 361 | 361 | 43 |  |  |  |
Current payables due to affiliates |  | 211 | 211 | 323 |  |  |  |
Long-term receivables due from affiliate |  | 52 | 52 | 68 |  |  |  |
Long-term payables due to affiliates |  | 227 | 227 | 219 |  |  |  |
Edison International | 2.40% Senior notes due 2022 |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |
Long-term debt |  | $ 400 | $ 400 | $ 400 |  |  |  |
Interest rate on debt (as a percent) |  | 2.40% | 2.40% | 2.40% |  |  |  |
Edison International | 3.125% Senior notes due 2022 |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |
Long-term debt |  | $ 300 | $ 300 | $ 300 |  |  |  |
Interest rate on debt (as a percent) |  | 3.125% | 3.125% | 3.125% |  |  |  |
Edison International | 2.95% Senior notes due 2023 |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |
Long-term debt |  | $ 400 | $ 400 | $ 400 |  |  |  |
Interest rate on debt (as a percent) |  | 2.95% | 2.95% | 2.95% |  |  |  |
Edison International | 3.55% Senior note due 2024 |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |
Long-term debt |  | $ 500 | $ 500 | $ 500 |  |  |  |
Interest rate on debt (as a percent) |  | 3.55% | 3.55% | 3.55% |  |  |  |
Edison International | 4.95% Senior notes due 2025 |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |
Long-term debt |  | $ 400 | $ 400 | $ 400 |  |  |  |
Interest rate on debt (as a percent) |  | 4.95% | 4.95% | 4.95% |  |  |  |
Edison International | 5.75% Senior notes due 2027 |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |
Long-term debt |  | $ 600 | $ 600 | $ 600 |  |  |  |
Interest rate on debt (as a percent) |  | 5.75% | 5.75% | 5.75% |  |  |  |
Edison International | 4.125% Senior notes due 2028 |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |
Long-term debt |  | $ 550 | $ 550 | $ 550 |  |  |  |
Interest rate on debt (as a percent) |  | 4.125% | 4.125% | 4.125% |  |  |  |
Edison International | Multi-year credit facilities |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |
Commitment |  | $ 1,500 | $ 1,500 |  |  |  |  |
Outstanding borrowings |  | 0 | 0 |  |  |  |  |
Amount available |  | $ 1,500 | $ 1,500 |  |  |  |  |
Contingent maximum available borrowing |  |  |  |  |  |  | $ 2,000 |
Edison International | Series A |  |  |  |  |  |  |  |
Equity |  |  |  |  |  |  |  |
Stock issued (in shares) | shares |  |  | 1,250,000 |  |  |  |  |
Preferred Stock, dividend rate, (as a percent) |  |  | 5.375% |  |  |  |  |
Liquidation value (in dollars per share) | $ / shares |  | $ 1,000 | $ 1,000 |  |  |  |  |
Margin rate for dividend rate reset (as a percent) |  | 4.698% | 4.698% |  |  |  |  |
Edison International | Series B |  |  |  |  |  |  |  |
Equity |  |  |  |  |  |  |  |
Stock issued (in shares) | shares |  |  | 750,000 |  |  |  |  |
Preferred Stock, dividend rate, (as a percent) |  |  | 5.00% |  |  |  |  |
Margin rate for dividend rate reset (as a percent) |  | 3.901% | 3.901% |  |  |  |  |
At-the-market Program (ATM) |  |  |  |  |  |  |  |
Equity |  |  |  |  |  |  |  |
Aggregate sale price |  |  |  |  |  |  |  | $ 1,500
Aggregate sales price remaining |  | $ 1,300 | $ 1,300 |  |  |  |  |
Stock issued (in shares) | shares |  |  | 0 |  |  |  |  |
At-the-market Program (ATM) | Edison International |  |  |  |  |  |  |  |
Equity |  |  |  |  |  |  |  |
Aggregate sale price |  |  |  |  |  |  |  | $ 1,500
Aggregate sales price remaining |  | $ 1,300 | $ 1,300 |  |  |  |  |
Stock issued (in shares) | shares |  | 0 | 0 |  |  |  |  |
401(K) |  |  |  |  |  |  |  |
Equity |  |  |  |  |  |  |  |
Stock issued (in shares) | shares |  |  | 522,400 | 1,644,500 |  |  |  |
Proceeds received, net of offering costs |  |  | $ 30 | $ 99 |  |  |  |
401(K) | Edison International |  |  |  |  |  |  |  |
Equity |  |  |  |  |  |  |  |
Stock issued (in shares) | shares |  |  | 522,400 | 1,644,500 |  |  |  |
Proceeds received, net of offering costs |  |  | $ 30 | $ 99 |  |  |  |
In lieu of dividend payment |  |  |  |  |  |  |  |
Equity |  |  |  |  |  |  |  |
Stock issued (in shares) | shares |  |  | 293,031 | 280,707 |  |  |  |
Proceeds received, net of offering costs |  |  | $ 17 | $ 17 |  |  |  |
In lieu of dividend payment | Edison International |  |  |  |  |  |  |  |
Equity |  |  |  |  |  |  |  |
Stock issued (in shares) | shares |  |  | 293,031 | 280,707 |  |  |  |
Proceeds received, net of offering costs |  |  | $ 17 | $ 17 |  |  |  |
Stock compensation awards |  |  |  |  |  |  |  |
Equity |  |  |  |  |  |  |  |
Stock issued (in shares) | shares |  |  | 629,092 | 387,425 |  |  |  |
Proceeds received, net of offering costs |  |  | $ 25 | $ 16 |  |  |  |
Stock compensation awards | Edison International |  |  |  |  |  |  |  |
Equity |  |  |  |  |  |  |  |
Stock issued (in shares) | shares |  |  | 629,092 | 387,425 |  |  |  |
Proceeds received, net of offering costs |  |  | $ 25 | $ 16 |  |  |  |
Optional cash investments |  |  |  |  |  |  |  |
Equity |  |  |  |  |  |  |  |
Stock issued (in shares) | shares |  |  | 26,475 | 35,999 |  |  |  |
Proceeds received, net of offering costs |  |  | $ 2 | $ 2 |  |  |  |
Optional cash investments | Edison International |  |  |  |  |  |  |  |
Equity |  |  |  |  |  |  |  |
Stock issued (in shares) | shares |  |  |  | 35,999 |  |  |  |
Proceeds received, net of offering costs |  |  |  | $ 2 |  |  |  |
SCE |  |  |  |  |  |  |  |
Basis of Presentation |  |  |  |  |  |  |  |
Weighted-average equity component authorization (as a percent) | 52.00% |  |  |  | 48.00% | 45.20% |  |
Weighted-average common equity component authorization, set by CPUC remaining over number of months (in months) |  |  |  |  | 37 months | 37 months |  |
Wildfire related charge incurred after tax |  |  |  |  |  | $ 1,800 |  |
Spot rate equity ratio |  |  |  |  |  | 47.70% |  |
Waiver threshold percent |  |  |  |  |  | 47.70% |  |
Weighted-average common equity component of total capitalization percent |  |  |  |  |  | 48.70% |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |
Commitment |  | $ 3,350 | 3,350 |  |  |  |  |
Outstanding borrowings |  | (601) | (601) |  |  |  |  |
Amount available |  | $ 2,554 | $ 2,554 |  |  |  |  |
Covenant debt to total capitalization ratio |  | 0.65 | 0.65 |  |  |  |  |
Actual debt to capitalization ratio |  | 0.55 | 0.55 |  |  |  |  |
Related Party Transactions |  |  |  |  |  |  |  |
Current receivables due from affiliates |  |  |  | $ 268 |  |  |  |
SCE | Multi-year credit facilities |  |  |  |  |  |  |  |
Debt and Credit Agreements |  |  |  |  |  |  |  |
Commitment |  | $ 3,350 | $ 3,350 |  |  |  |  |
Outstanding borrowings |  | (601) | (601) |  |  |  |  |
Amount available |  | 2,554 | 2,554 |  |  |  |  |
Contingent maximum available borrowing |  | $ 4,000 | $ 4,000 |  |  |  |  |

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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the 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)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition The distributions of earnings to an entity that is affiliated with the reporting entity by means of direct or indirect ownership. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3291-108585 + Details
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- Definition The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(d)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21475-112644 Reference 3: 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(28)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21484-112644 + Details
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