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Accumulated Other Comprehensive Loss (Tables) | 9 Months Ended
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Sep. 30, 2021
Equity [Abstract] |
Components of Accumulated Other Comprehensive Loss | Edison International's accumulated other comprehensive loss, net of tax, consist of:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended September 30, | ​ | Nine months ended September 30,
(in millions) |  | 2021 |  | 2020 |  | 2021 |  | 2020
Beginning balance | ​ | $ | (65) | ​ | $ | (65) | ​ | $ | (69) | ​ | $ | (69)
Pension and PBOP – net loss: | ​ |  | ​ | ​ |  |  | ​ |  |  | ​ |  |
Reclassified from accumulated other comprehensive loss1 | ​ |  | 2 | ​ |  | 2 | ​ |  | 6 | ​ |  | 6
Change | ​ |  | 2 | ​ |  | 2 | ​ |  | 6 | ​ |  | 6
Ending Balance | ​ | $ | (63) | ​ | $ | (63) | ​ | $ | (63) | ​ | $ | (63)
1 | These items are included in the computation of net periodic pension and PBOP Plan expense. See Note 9 for additional information.
SCE's accumulated other comprehensive loss, net of tax, consists of:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended September 30, | ​ | Nine months ended September 30,
(in millions) |  | 2021 |  | 2020 |  | 2021 |  | 2020
Beginning balance | ​ | $ | (38) | ​ | $ | (36) | ​ | $ | (41) | ​ | $ | (39)
Pension and PBOP – net loss: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Reclassified from accumulated other comprehensive loss1 | ​ |  | 2 | ​ |  | 1 | ​ |  | 5 | ​ |  | 4
Change | ​ |  | 2 | ​ |  | 1 | ​ |  | 5 | ​ |  | 4
Ending Balance | ​ | $ | (36) | ​ | $ | (35) | ​ | $ | (36) | ​ | $ | (35)
1 | These items are included in the computation of net periodic pension and PBOP Plan expense. See Note 9 for additional information.

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669686-108580 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900 + Details
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