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Other Income (Tables) | 9 Months Ended
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Sep. 30, 2021
Other Income [Abstract] |
Summary of Other Income | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended | ​ | Nine months ended
​ | ​ | September 30, | ​ | September 30,
(in millions) |  | 2021 |  | 2020 |  | 2021 |  | 2020
SCE other income (expense): |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Equity allowance for funds used during construction | ​ | $ | 32 | ​ | $ | 36 | ​ | $ | 92 | ​ | $ | 87
Increase in cash surrender value of life insurance policies and life insurance benefits | ​ |  | 8 | ​ |  | 27 | ​ |  | 33 | ​ |  | 60
Interest income | ​ |  | 1 | ​ |  | 2 | ​ |  | 2 | ​ |  | 18
Net periodic benefit income – non-service components | ​ |  | 33 | ​ |  | 28 | ​ |  | 99 | ​ |  | 83
Civic, political and related activities and donations | ​ |  | (16) | ​ |  | (7) | ​ |  | (28) | ​ |  | (22)
Other | ​ |  | (5) | ​ |  | (3) | ​ |  | (9) | ​ |  | (9)
Total SCE other income | ​ | $ | 53 | ​ | $ | 83 | ​ | $ | 189 | ​ | $ | 217
Other income (expense) of Edison International Parent and Other: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Net periodic benefit costs – non-service components | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | (1)
Unrealized (losses) gains on investment in Proterra | ​ | ​ | (8) | ​ | ​ | — | ​ | ​ | 4 | ​ | ​ | —
Other | ​ |  | 2 | ​ |  | 1 | ​ |  | 2 | ​ |  | 1
Total Edison International other income | ​ | $ | 47 | ​ | $ | 84 | ​ | $ | 195 | ​ | $ | 217

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- Definition Tabular disclosure of the components of non-operating income or non-operating expense that may include amounts earned from dividends, interest on securities, gains (losses) on securities sold, equity earnings of unconsolidated affiliates, net gain (loss) on sales of business, interest expense and other miscellaneous income or expense items. + References No definition available. + Details
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