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Accumulated Other Comprehensive Loss (Tables) | 3 Months Ended
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Mar. 31, 2018
Equity [Abstract] |
Components of Accumulated Other Comprehensive Loss | The changes in accumulated other comprehensive loss, net of tax, consist of:
| Edison International |  | SCE
| Three months ended March 31,
(in millions) | 2018 |  | 2017 |  | 2018 |  | 2017
Beginning balance | $ | (43 | ) |  | $ | (53 | ) |  | $ | (19 | ) |  | $ | (20 | )
Pension and PBOP – net loss: |  |  |  |  |  |  |
Reclassified from accumulated other comprehensive loss 1 | 2 |  |  | 2 |  |  | 2 |  |  | 1 |
Other 2 | (5 | ) |  | 2 |  |  | (5 | ) |  | 1 |
Change | (3 | ) |  | 4 |  |  | (3 | ) |  | 2 |
Ending Balance | $ | (46 | ) |  | $ | (49 | ) |  | $ | (22 | ) |  | $ | (18 | )
1 | These items are included in the computation of net periodic pension and PBOP Plan expense. See Note 9 for additional information.
2 | Effective January 1, 2018, Edison International and SCE adopted an accounting standards update related to the measurement of financial instruments. As a result of this new accounting guidance, Edison International and SCE recognized cumulative effect adjustments to the opening balance of retained earnings and accumulated other comprehensive loss on January 1, 2018. See Note 1 for further 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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