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Variable Interest Entities (Trusts) (Details) - SCE - USD ($) | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Trust Securities [Member] |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |
Liquidation value (in dollars per share) |  |  | $ 2,500 |  |  |  |
5.10% Series G Preferred Stock |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |
Security dividend rate, (as a percent) | 5.10% |  |  |  |  |  |
5.75% Series H Preferred Stock |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |
Security dividend rate, (as a percent) | 5.75% |  |  |  |  |  |
5.375% Series J Preferred Stock |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |
Security dividend rate, (as a percent) | 5.375% |  |  |  |  |  |
5.45% Series K Preferred Stock |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |
Security dividend rate, (as a percent) | 5.45% |  |  |  |  |  |
5.00% Series L Preferred Stock |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |
Security dividend rate, (as a percent) | 5.00% |  |  |  |  |  |
Variable Interest Entity, Not Primary Beneficiary |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |
Liquidation value (in dollars per share) |  |  | $ 25 |  |  |  |
Common stock | $ 10,000 | $ 10,000 | $ 10,000 |  |  |  |
Power Purchase Agreement |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |
Amounts paid to VIEs | 608,000,000 | 673,000,000 |  |  |  |  |
Trust II |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |
Liquidation preference |  |  |  |  |  |  | $ 400,000,000
Trust II | Trust Securities [Member] |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |
Liquidation preference | 220,000,000 | 220,000,000 |  |  |  |  |
Trust II | 5.10% Series G Preferred Stock |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |
Security dividend rate, (as a percent) |  |  |  |  |  |  | 5.10%
Liquidation preference | 220,000,000 | 220,000,000 |  |  |  |  | $ 400,000,000
Trust III |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |
Liquidation preference |  |  |  |  |  | $ 275,000,000 |
Trust III | Trust Securities [Member] |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |
Liquidation preference | 275,000,000 | 275,000,000 |  |  |  |  |
Trust III | 5.75% Series H Preferred Stock |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |
Security dividend rate, (as a percent) |  |  |  |  |  | 5.75% |
Liquidation preference | 275,000,000 | 275,000,000 |  |  |  | $ 275,000,000 |
Trust IV |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |
Liquidation preference |  |  |  |  | $ 325,000,000 |  |
Trust IV | Trust Securities [Member] |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |
Liquidation preference | 325,000,000 | 325,000,000 |  |  |  |  |
Trust IV | 5.375% Series J Preferred Stock |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |
Security dividend rate, (as a percent) |  |  |  |  | 5.375% |  |
Liquidation preference | 325,000,000 | 325,000,000 |  |  | $ 325,000,000 |  |
Trust V |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |
Liquidation preference |  |  |  | $ 300,000,000 |  |  |
Trust V | Trust Securities [Member] |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |
Liquidation preference | 300,000,000 | 300,000,000 |  |  |  |  |
Trust V | 5.45% Series K Preferred Stock |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |
Security dividend rate, (as a percent) |  |  |  | 5.45% |  |  |
Liquidation preference | 300,000,000 | 300,000,000 |  | $ 300,000,000 |  |  |
Trust VI |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |
Liquidation preference |  |  | $ 475,000,000 |  |  |  |
Trust VI | Trust Securities [Member] |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |
Liquidation preference | 475,000,000 | 475,000,000 |  |  |  |  |
Trust VI | 5.00% Series L Preferred Stock |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |
Security dividend rate, (as a percent) |  |  | 5.00% |  |  |  |
Liquidation preference | $ 475,000,000 | $ 475,000,000 | $ 475,000,000 |  |  |  |

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- Definition Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 10 -URI https://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766 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(29)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + 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 https://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 https://asc.fasb.org/extlink&oid=126973232&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 https://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 https://asc.fasb.org/extlink&oid=126973232&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 https://asc.fasb.org/extlink&oid=126973232&loc=d3e21484-112644 + Details
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