Investments (Trust Value) (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Fair Value
Fair Value	$ 4,769	$ 4,833
SCE
Fair Value
Amortized Cost	2,611	2,494
Fair Value	4,769	4,833
SCE \| Municipal bonds
Fair Value
Amortized Cost	836	1,013
SCE \| U.S. government and agency securities
Fair Value
Amortized Cost	1,129	740
SCE \| Corporate bonds
Fair Value
Amortized Cost	394	460
SCE \| Short-term investments and receivables/payables
Fair Value
Amortized Cost	252	281
SCE \| Fair Value, Measurements, Recurring
Fair Value
Fair Value	4,816	5,039
SCE \| Fair Value, Measurements, Recurring \| Stocks
Fair Value
Fair Value	1,819	1,908
SCE \| Fair Value, Measurements, Recurring \| Municipal bonds
Fair Value
Fair Value	990	1,218
SCE \| Fair Value, Measurements, Recurring \| U.S. government and agency securities
Fair Value
Fair Value	1,238	864
SCE \| Fair Value, Measurements, Recurring \| Corporate bonds
Fair Value
Fair Value	459	550
SCE \| Fair Value, Measurements, Recurring \| Short-term investments and receivables/payables
Fair Value
Fair Value	263	293
Repurchase agreements payable	$ 59	$ 138

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

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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849

+ 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

The carrying value of securities purchased to be resold in reverse repurchase transactions as of the balance sheet date.

+ References

No definition available.

+ Details

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