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Summary of Significant Accounting Policies (Tables) | 9 Months Ended
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Sep. 30, 2014
Significant Accounting Policies [Line Items] |
Revision to Consolidated Statement of Cash Flow | The following table presents the cash flow statement effects related to the revision for the nine months ended September 30, 2013 and the year ended December 31, 2013:
| Edison International |  | Southern California Edison
(in millions) | As Reported |  | Adjustment |  | As Revised |  | As Reported |  | Adjustment |  | As Revised
Nine months ended September 30, 2013
Cash flows from operating activities: |  |  |  |  |  |  |  |  |  |  |
Adjustments to reconcile to net cash provided by operating activities: |  |  |  |  |  |  |  |  |  |  |
Regulatory impacts of net nuclear decommissioning trust earnings | $ | 265 |  |  | $ | (183 | ) |  | $ | 82 |  |  | $ | 265 |  |  | $ | (183 | ) |  | $ | 82 |
Total cash provided by operating activities | 2,253 |  |  | (183 | ) |  | 2,070 |  |  | 2,346 |  |  | (183 | ) |  | 2,163 |
Cash flows from investing activities: |  |  |  |  |  |  |  |  |  |  |
Purchases of nuclear decommissioning trust investments | (4,857 | ) |  | 183 |  |  | (4,674 | ) |  | (4,857 | ) |  | 183 |  |  | (4,674 | )
Total cash used by investing activities | (3,088 | ) |  | 183 |  |  | (2,905 | ) |  | (3,065 | ) |  | 183 |  |  | (2,882 | )
| Edison International |  | Southern California Edison
(in millions) | As Reported |  | Adjustment |  | As Revised |  | As Reported |  | Adjustment |  | As Revised
Year ended December 31, 2013
Cash flows from operating activities: |  |  |  |  |  |  |  |  |  |  |
Adjustments to reconcile to net cash provided by operating activities: |  |  |  |  |  |  |  |  |  |  |
Regulatory impacts of net nuclear decommissioning trust earnings | $ | 312 |  |  | $ | (236 | ) |  | $ | 76 |  |  | $ | 312 |  |  | $ | (236 | ) |  | $ | 76 |
Total cash provided by operating activities | 3,203 |  |  | (236 | ) |  | 2,967 |  |  | 3,284 |  |  | (236 | ) |  | 3,048 |
Cash flows from investing activities: |  |  |  |  |  |  |  |  |  |  |
Purchases of nuclear decommissioning trust investments | (5,951 | ) |  | 236 |  |  | (5,715 | ) |  | (5,951 | ) |  | 236 |  |  | (5,715 | )
Total cash used by investing activities | (3,808 | ) |  | 236 |  |  | (3,572 | ) |  | (3,783 | ) |  | 236 |  |  | (3,547 | )
Cash Equivalents | The cash equivalents were as follows:
|  | Edison International |  | SCE
(in millions) |  | September 30, 2014 |  | December 31, 2013 |  | September 30, 2014 |  | December 31, 2013
Money market funds |  | $ | 40 |  |  | $ | 68 |  |  | $ | 8 |  |  | $ | 8 |
|  | Edison International |  | SCE
(in millions) |  | September 30, 2014 |  | December 31, 2013 |  | September 30, 2014 |  | December 31, 2013
Book balances reclassified to accounts payable |  | $ | 191 |  |  | $ | 168 |  |  | $ | 190 |  |  | $ | 163 |
EPS Attributable to Edison International Common Shareholders | EPS attributable to Edison International common shareholders was computed as follows:
|  | Three months ended September 30, |  | Nine months ended September 30,
(in millions, except per-share amounts) |  | 2014 |  | 2013 |  | 2014 |  | 2013
Basic earnings per share – continuing operations: |  |  |  |  |  |  |  |
Income from continuing operations available to common shareholders |  | $ | 496 |  |  | $ | 463 |  |  | $ | 1,046 |  |  | $ | 615 |
Weighted average common shares outstanding |  | 326 |  |  | 326 |  |  | 326 |  |  | 326 |
Basic earnings per share – continuing operations |  | $ | 1.52 |  |  | $ | 1.42 |  |  | $ | 3.21 |  |  | $ | 1.88 |
Diluted earnings per share – continuing operations: |  |  |  |  |  |  |  |
Income from continuing operations available to common shareholders |  | $ | 496 |  |  | $ | 463 |  |  | $ | 1,046 |  |  | $ | 615 |
Income impact of assumed conversions |  | — |  |  | — |  |  | 1 |  |  | 1 |
Income from continuing operations available to common shareholders and assumed conversions |  | $ | 496 |  |  | $ | 463 |  |  | $ | 1,047 |  |  | $ | 616 |
Weighted average common shares outstanding |  | 326 |  |  | 326 |  |  | 326 |  |  | 326 |
Incremental shares from assumed conversions |  | 3 |  |  | 2 |  |  | 3 |  |  | 3 |
Adjusted weighted average shares – diluted |  | 329 |  |  | 328 |  |  | 329 |  |  | 329 |
Diluted earnings per share – continuing operations |  | $ | 1.51 |  |  | $ | 1.41 |  |  | $ | 3.18 |  |  | $ | 1.87 |
Southern California Edison |
Significant Accounting Policies [Line Items] |
Changes in ARO Liability | The following table summarizes the changes in SCE's ARO liability for the nine month period ended September 30, 2014 and the twelve month period ended December 31, 2013, including San Onofre and Palo Verde:
(in millions) | September 30, 2014 |  | December 31, 2013
Beginning balance | $ | 3,418 |  |  | $ | 2,782 |
Accretion 1 | 150 |  |  | 182 |
Revisions | (604 | ) |  | 455 |
Liabilities settled | (4 | ) |  | (1 | )
Ending balance | $ | 2,960 |  |  | $ | 3,418 |
1 | An ARO represents the present value of a future obligation. Accretion is an increase in the liability to account for the time value of money resulting from discounting.

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