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Income Taxes (Interest and Penalties) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Income Tax Disclosure [Line Items] |  |  |  |
Tax settlement increase (decrease) on earnings | $ 146 | $ 146 |  |
Tax refund | 60 |  |  |
Accrued interest and penalties |  |  | $ 52 |
Net after-tax interest and penalties tax (benefit) expense |  | (41) | 4 | $ 4
SCE |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |
Tax settlement increase (decrease) on earnings | 36 | 36 |  |
Accrued interest and penalties | $ 20 | 20 | 23 |
Net after-tax interest and penalties tax (benefit) expense |  | $ (2) | $ 6 | $ 3

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- Definition The amount of the additional liability or refund received or expected based on a final settlement with a taxing authority. + References No definition available. + Details
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- Definition The amount of estimated penalties and interest accrued as of the balance sheet date arising from income tax examinations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319 + Details
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- Definition The amount of cash received during the period as refunds for the overpayment of taxes. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3536-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4297-108586 + Details
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