Investments (Trust Value) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Fair Value
Fair Values	$ 3,943	$ 3,948
SCE
Fair Value
Fair Values	3,943	3,948
SCE \| Total debt securities and other
Fair Value
Amortized Costs	2,243	2,158
Fair Values	2,393	2,338
SCE \| Municipal bonds
Fair Value
Amortized Costs	632	672
Fair Values	682	754
SCE \| Government and agency securities
Fair Value
Amortized Costs	1,146	1,025
Fair Values	1,210	1,091
SCE \| Corporate bonds
Fair Value
Amortized Costs	350	351
Fair Values	376	377
SCE \| Short-term investments and receivables/payables
Fair Value
Amortized Costs	115	110
Fair Values	125	116
SCE \| Repurchase agreements
Fair Value
Fair Values		$ 41
Repurchase agreement secured by US Treasury Securities (as a percent)		97.00%
SCE \| Equity securities
Fair Value
Fair Values	1,550	$ 1,610
SCE \| Fair Value, Measurements, Recurring
Fair Value
Fair Values	$ 4,033	$ 4,033

The amount of decommissioning trust assets at amortized cost as of the balance sheet date.

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- Definition

Repurchase agreement collateralized/secured by US Treasury Securities (as a percent)

+ References

No definition available.

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- Definition

The fair value of investments held in a trust fund to pay for the costs of decontaminating and decommissioning facilities, whether such amount is presented as a separate caption or as a parenthetical disclosure on the balance sheet. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 410
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481850/410-20-50-1

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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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-3

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