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Accumulated Other Comprehensive Loss (Tables) | 12 Months Ended
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Dec. 31, 2017
Equity [Abstract] |
Components of Accumulated Other Comprehensive Loss | The changes in accumulated other comprehensive loss, net of tax, consist of:
| Edison International |  | SCE
| Years ended December 31,
(in millions) | 2017 |  | 2016 |  | 2017 |  | 2016
Beginning balance | $ | (53 | ) |  | $ | (56 | ) |  | $ | (20 | ) |  | $ | (22 | )
Pension and PBOP – net gain (loss): |  |  |  |  |  |  |
Other comprehensive income (loss) before reclassifications | 3 |  |  | (4 | ) |  | (2 | ) |  | (2 | )
Reclassified from accumulated other comprehensive loss 1 | 7 |  |  | 6 |  |  | 3 |  |  | 3 |
Other | — |  |  | 1 |  |  | — |  |  | 1 |
Change | 10 |  |  | 3 |  |  | 1 |  |  | 2 |
Ending balance | $ | (43 | ) |  | $ | (53 | ) |  | $ | (19 | ) |  | $ | (20 | )
1 | These items are included in the computation of net periodic pension and PBOP expenses. See Note 8 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/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 + Details
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