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Quarterly Financial Data (Unaudited) | 12 Months Ended
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Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract] |
Quarterly Financial Data (Unaudited) | Quarterly Financial Data (Unaudited) Edison International's quarterly financial data is as follows:
| 2020
(in millions, except per share amounts) |  | Fourth |  | Third |  | Second |  | First
Operating revenue |  | $ | 3,157 |  |  | $ | 4,644 |  |  | $ | 2,987 |  |  | $ | 2,790 |
Operating income (loss) |  | 794 |  |  | (379) |  |  | 500 |  |  | 302 |
Net income (loss) |  | 552 |  |  | (242) |  |  | 348 |  |  | 213 |
Net income (loss) attributable to common shareholders |  | 526 |  |  | (288) |  |  | 318 |  |  | 183 |
Basic earnings (loss) per share: |  | $ | 1.39 |  |  | $ | (0.76) |  |  | $ | 0.85 |  |  | $ | 0.50 |
Diluted earnings (loss) per share: |  | $ | 1.39 |  |  | $ | (0.76) |  |  | $ | 0.85 |  |  | $ | 0.50 |
Dividends declared per share |  | 0.6625 |  |  | 0.6375 |  |  | 0.6375 |  |  | 0.6375 |
| 2019
(in millions, except per share amounts) |  | Fourth |  | Third |  | Second |  | First
Operating revenue |  | $ | 2,970 |  |  | $ | 3,741 |  |  | $ | 2,812 |  |  | $ | 2,824 |
Operating income |  | 287 |  |  | 636 |  |  | 500 |  |  | 352 |
Net income |  | 173 |  |  | 502 |  |  | 422 |  |  | 308 |
Net income attributable to common shareholders |  | 143 |  |  | 471 |  |  | 392 |  |  | 278 |
Basic earnings per share: |  | $ | 0.40 |  |  | $ | 1.36 |  |  | $ | 1.20 |  |  | $ | 0.85 |
Diluted earnings per share: |  | $ | 0.40 |  |  | $ | 1.35 |  |  | $ | 1.20 |  |  | $ | 0.85 |
Dividends declared per share |  | 0.6375 |  |  | 0.6125 |  |  | 0.6125 |  |  | 0.6125 |
SCE's quarterly financial data is as follows:
| 2020
(in millions) |  | Fourth |  | Third |  | Second |  | First
Operating revenue |  | $ | 3,151 |  |  | $ | 4,635 |  |  | $ | 2,980 |  |  | $ | 2,780 |
Operating income (loss) |  | 678 |  |  | (364) |  |  | 548 |  |  | 316 |
Net income (loss) |  | 500 |  |  | (218) |  |  | 411 |  |  | 249 |
Net income (loss) available for common stock |  | 474 |  |  | (264) |  |  | 381 |  |  | 219 |
Common dividends declared |  | 325 |  |  | 269 |  |  | 269 |  |  | 269 |
| 2019
(in millions) |  | Fourth |  | Third |  | Second |  | First
Operating revenue |  | $ | 2,958 |  |  | $ | 3,732 |  |  | $ | 2,800 |  |  | $ | 2,816 |
Operating income |  | 325 |  |  | 649 |  |  | 513 |  |  | 358 |
Net income |  | 224 |  |  | 534 |  |  | 449 |  |  | 323 |
Net income available for common stock |  | 194 |  |  | 503 |  |  | 419 |  |  | 293 |
Common dividends declared |  | 200 |  |  | 200 |  |  | — |  |  | 200 |
Due to the seasonal nature of Edison International and SCE's business, a significant amount of revenue and earnings are recorded in the third quarter of each year.

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- Definition The entire disclosure for quarterly financial data. Includes, but is not limited to, tabular presentation of financial information for fiscal quarters, effect of year-end adjustments, and an explanation of matters or transactions that affect comparability of the information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -URI http://asc.fasb.org/topic&trid=2126967 + Details
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