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Summary of Significant Accounting Policies (Tables) | 3 Months Ended
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Mar. 31, 2013
Accounting Policies [Abstract] |
Cash Equivalents | Checks issued, but not yet paid by the financial institution, are reclassified from cash to accounts payable at the end of each reporting period as follows:
| Edison International |  | SCE
(in millions) | March 31, 2013 |  | December 31, 2012 |  | March 31, 2013 |  | December 31, 2012
Cash reclassified to accounts payable | $ | 165 |  |  | $ | 247 |  |  | $ | 165 |  |  | $ | 242 |
The cash equivalents were as follows:
| Edison International |  | SCE
(in millions) | March 31, 2013 |  | December 31, 2012 |  | March 31, 2013 |  | December 31, 2012
Money market funds | $ | 58 |  |  | $ | 107 |  |  | $ | 5 |  |  | $ | 5 |
Inventory Components | Inventory consisted of the following:
(in millions) | March 31, 2013 |  | December 31, 2012
Materials, supplies and spare parts | $ | 333 |  |  | $ | 319 |
Fuel | 18 |  |  | 21 |
Total inventory | $ | 351 |  |  | $ | 340 |
EPS Attributable to Edison International Common Shareholders | EPS attributable to Edison International common shareholders was computed as follows:
| Three months ended March 31,
(in millions) | 2013 |  | 2012
Basic earnings per share – continuing operations: |  |  |
Income from continuing operations available to common shareholders | $ | 259 |  |  | $ | 177 |
Weighted average common shares outstanding | 326 |  |  | 326 |
Basic earnings per share – continuing operations | $ | 0.79 |  |  | $ | 0.54 |
Diluted earnings per share – continuing operations: |  |  |
Income from continuing operations available to common shareholders | $ | 259 |  |  | $ | 177 |
Income impact of assumed conversions | — |  |  | — |
Income from continuing operations available to common shareholders and assumed conversions | $ | 259 |  |  | $ | 177 |
Weighted average common shares outstanding | 326 |  |  | 326 |
Incremental shares from assumed conversions | 3 |  |  | 3 |
Adjusted weighted average shares – diluted | 329 |  |  | 329 |
Diluted earnings per share – continuing operations | $ | 0.78 |  |  | $ | 0.54 |

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=16381557&loc=d3e4984-109258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1278-109256 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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- Definition The entire disclosure for inventory. This may include, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the major classes of inventory, and the nature of the cost elements included in inventory. If inventory is stated above cost, accrued net losses on firm purchase commitments for inventory and losses resulting from valuing inventory at the lower-of-cost-or-market may also be included. For LIFO inventory, may disclose the amount and basis for determining the excess of replacement or current cost over stated LIFO value and the effects of a LIFO quantities liquidation that impacts net income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 6 -Subparagraph a, b, c -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6361739&loc=d3e7789-107766 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Section A -Paragraph 9 -Chapter 3 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.6) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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