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Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Quarterly Financial Data [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total operating revenue | $ 3,220 | $ 3,672 | $ 2,965 | $ 2,463 | $ 2,884 | $ 3,767 | $ 2,777 | $ 2,440 | $ 12,320 | $ 11,869 | $ 11,524
Operating income (loss) | (16) | 561 | 469 | 479 | 566 | 695 | 381 | 448 | 1,493 | 2,092 | 2,008
Net income (loss) |  |  |  |  |  |  |  |  | 668 | 1,425 | 1,117
Income (loss) from continuing operations | (534) | 501 | 309 | 392 | 347 | 451 | 310 | 305 | 668 | 1,413 | 1,082
Income (loss) from discontinued operations, net | 0 | 0 | 0 | 0 | 13 | 0 | (2) | 1 | 0 | 12 | 35
Net income attributable to common shareholders | $ (545) | $ 470 | $ 278 | $ 362 | $ 329 | $ 421 | $ 280 | $ 281 | $ 565 | $ 1,311 | $ 1,020
Basic earnings per share – continuing operations: |  |  |  |  |  |  |  |  |  |  |
Continuing operations (in dollars per share) | $ (1.67) | $ 1.44 | $ 0.85 | $ 1.11 | $ 0.97 | $ 1.29 | $ 0.87 | $ 0.86 | $ 1.73 | $ 3.99 | $ 3.02
Discontinued operations (in dollars per share) | 0.00 | 0.00 | 0.00 | 0.00 | 0.04 | 0.00 | (0.01) | 0.00 | 0.00 | 0.03 | 0.11
Total (in dollars per share) | (1.67) | 1.44 | 0.85 | 1.11 | 1.01 | 1.29 | 0.86 | 0.86 | 1.73 | 4.02 | 3.13
Diluted earnings per share – continuing operations: |  |  |  |  |  |  |  |  |  |  |
Continuing operations (in dollars per share) | (1.66) | 1.43 | 0.85 | 1.10 | 0.96 | 1.27 | 0.86 | 0.85 | 1.72 | 3.94 | 2.99
Diluted earnings (loss) per share – discontinued operations (in dollars per share) | 0.00 | 0.00 | 0.00 | 0.00 | 0.04 | 0.00 | (0.01) | 0.00 | 0.00 | 0.03 | 0.11
Total (in dollars per share) | (1.66) | 1.43 | 0.85 | 1.10 | 1.00 | 1.27 | 0.85 | 0.85 | 1.72 | 3.97 | 3.10
Dividends declared per common share (in dollars per share) | 0.6050 | 0.5425 | 0.5425 | 0.5425 | 0.5425 | 0.4800 | 0.4800 | 0.4800 | 2.2325 | 1.9825 | $ 1.7325
Common stock prices: |  |  |  |  |  |  |  |  |  |  |
High (in dollars per share) | 83.38 | 81.58 | 82.82 | 81.33 | 73.81 | 78.72 | 77.71 | 72.34 | 83.38 | 78.72 |
Low (in dollars per share) | 62.67 | 76.38 | 77.21 | 70.57 | 67.44 | 71.31 | 67.71 | 57.97 | 62.67 | 57.97 |
Close (in dollars per share) | $ 63.24 | $ 77.17 | $ 78.19 | $ 79.61 | $ 71.99 | $ 72.25 | $ 77.67 | $ 71.89 | $ 63.24 | $ 71.99 |
Impairment and other charges |  |  |  |  |  |  |  |  | $ 738 | $ 21 | $ 5
Edison International Parent and Other |  |  |  |  |  |  |  |  |  |  |
Common stock prices: |  |  |  |  |  |  |  |  |  |  |
Write-down for re-measurement of deferred taxes as a result of the Tax Cuts and Jobs Act | $ 433 |  |  |  |  |  |  |  |  |  |
SCE |  |  |  |  |  |  |  |  |  |  |
Quarterly Financial Data [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total operating revenue | 3,193 | $ 3,652 | $ 2,953 | $ 2,456 | $ 2,874 | $ 3,752 | $ 2,768 | $ 2,435 | 12,254 | 11,830 | 11,485
Operating income (loss) | (4) | 578 | 517 | 507 | 594 | 721 | 429 | 472 | 1,598 | 2,217 | 2,080
Net income (loss) | (79) | 497 | 338 | 380 | 359 | 466 | 349 | 325 | 1,136 | 1,499 | 1,111
Net income attributable to common shareholders | (109) | 465 | 307 | 349 | 328 | 435 | 318 | 295 | 1,012 | 1,376 | 998
Common stock prices: |  |  |  |  |  |  |  |  |  |  |
Common dividends declared | 212 | $ 191 | $ 191 | $ 191 | $ 191 | $ 170 | $ 170 | $ 170 | 785 | 701 |
Impairment and other charges |  |  |  |  |  |  |  |  | $ 716 | $ 0 | $ 0
SCE | Revised San Onofre settlement agreement |  |  |  |  |  |  |  |  |  |  |
Common stock prices: |  |  |  |  |  |  |  |  |  |  |
Impairment and other charges | 716 |  |  |  |  |  |  |  |  |  |
Impairment and other charges, net of tax | $ 448 |  |  |  |  |  |  |  |  |  |

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