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Consolidated Statements of Changes in Equity (Details) (USD $) In Millions, except Per Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Balance, at the beginning of the period |  |  | $ 11,691 | $ 11,191
Net income (loss) | 566 | (70) | 768 | 227
Other comprehensive income (loss) | (2) | 5 | 0 | 5
Common stock dividends declared |  |  | (231) | (220)
Dividends, distributions to noncontrolling interests and other |  |  | (57) | (51)
Stock-based compensation and other |  |  | (51) | (37)
Noncash stock-based compensation and other |  |  | 14 | 6
Issuance of preference stock |  |  | 269 | 387
Redemption of preference stock |  |  |  | (400)
Balance, at the end of the period | 12,403 | 11,108 | 12,403 | 11,108
Dividends declared per common share (in dollars per share) | $ 0.3550 | $ 0.3375 | $ 0.7100 | $ 0.6750
Common Stock Including Additional Paid in Capital |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Balance, at the beginning of the period |  |  | 2,403 | 2,373
Net income (loss) |  |  | 0 | 0
Other comprehensive income (loss) |  |  |  | 0
Common stock dividends declared |  |  | 0 | 0
Dividends, distributions to noncontrolling interests and other |  |  | 0 | 0
Stock-based compensation and other |  |  | 17 | 3
Noncash stock-based compensation and other |  |  | 14 | 12
Issuance of preference stock |  |  | 0 | 0
Redemption of preference stock |  |  |  | 0
Balance, at the end of the period | 2,434 | 2,388 | 2,434 | 2,388
Accumulated Other Comprehensive Loss |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Balance, at the beginning of the period |  |  | (13) | (87)
Net income (loss) |  |  | 0 | 0
Other comprehensive income (loss) |  |  |  | 5
Common stock dividends declared |  |  | 0 | 0
Dividends, distributions to noncontrolling interests and other |  |  | 0 | 0
Stock-based compensation and other |  |  | 0 | 0
Noncash stock-based compensation and other |  |  | 0 | 0
Issuance of preference stock |  |  | 0 | 0
Redemption of preference stock |  |  |  | 0
Balance, at the end of the period | (13) | (82) | (13) | (82)
Retained Earnings |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Balance, at the beginning of the period |  |  | 7,548 | 7,146
Net income (loss) |  |  | 712 | 176
Other comprehensive income (loss) |  |  |  | 0
Common stock dividends declared |  |  | (231) | (220)
Dividends, distributions to noncontrolling interests and other |  |  | 0 | 0
Stock-based compensation and other |  |  | (68) | (40)
Noncash stock-based compensation and other |  |  | (1) | (5)
Issuance of preference stock |  |  | 0 | 0
Redemption of preference stock |  |  |  | (8)
Balance, at the end of the period | 7,960 | 7,049 | 7,960 | 7,049
Subtotal |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Balance, at the beginning of the period |  |  | 9,938 | 9,432
Net income (loss) |  |  | 712 | 176
Other comprehensive income (loss) |  |  |  | 5
Common stock dividends declared |  |  | (231) | (220)
Dividends, distributions to noncontrolling interests and other |  |  | 0 | 0
Stock-based compensation and other |  |  | (51) | (37)
Noncash stock-based compensation and other |  |  | 13 | 7
Issuance of preference stock |  |  | 0 | 0
Redemption of preference stock |  |  |  | (8)
Balance, at the end of the period | 10,381 | 9,355 | 10,381 | 9,355
Preferred Stock and Preference Stock |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Balance, at the beginning of the period |  |  | 1,753 | 1,759
Net income (loss) |  |  | 56 | 51
Other comprehensive income (loss) |  |  |  | 0
Common stock dividends declared |  |  | 0 | 0
Dividends, distributions to noncontrolling interests and other |  |  | (57) | (51)
Stock-based compensation and other |  |  | 0 | 0
Noncash stock-based compensation and other |  |  | 1 | (1)
Issuance of preference stock |  |  | 269 | 387
Redemption of preference stock |  |  |  | (392)
Balance, at the end of the period | 2,022 | 1,753 | 2,022 | 1,753
Southern California Edison |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Balance, at the beginning of the period |  |  | 12,138 | 11,743
Net income (loss) | 392 | (67) | 626 | 216
Other comprehensive income (loss) | 2 | 2 | 3 | (1)
Common stock dividends declared |  |  | (252) | (240)
Dividends on preferred and preference stock |  |  | (57) | (51)
Stock-based compensation and other |  |  | (30) | (34)
Noncash stock-based compensation and other |  |  | 3 | 12
Issuance of preference stock |  |  | 269 | 387
Redemption of preference stock |  |  |  | (400)
Balance, at the end of the period | 12,700 | 11,632 | 12,700 | 11,632
Southern California Edison | Common Stock |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Balance, at the beginning of the period |  |  | 2,168 | 2,168
Net income (loss) |  |  | 0 | 0
Other comprehensive income (loss) |  |  | 0 | 0
Common stock dividends declared |  |  | 0 | 0
Dividends on preferred and preference stock |  |  | 0 | 0
Stock-based compensation and other |  |  | 0 | 0
Noncash stock-based compensation and other |  |  | 0 | 0
Issuance of preference stock |  |  | 0 | 0
Redemption of preference stock |  |  |  | 0
Balance, at the end of the period | 2,168 | 2,168 | 2,168 | 2,168
Southern California Edison | Additional Paid-in Capital |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Balance, at the beginning of the period |  |  | 592 | 581
Net income (loss) |  |  | 0 | 0
Other comprehensive income (loss) |  |  | 0 | 0
Common stock dividends declared |  |  | 0 | 0
Dividends on preferred and preference stock |  |  | 0 | 0
Stock-based compensation and other |  |  | 12 | 1
Noncash stock-based compensation and other |  |  | 5 | 7
Issuance of preference stock |  |  | (6) | (13)
Redemption of preference stock |  |  |  | 8
Balance, at the end of the period | 603 | 584 | 603 | 584
Southern California Edison | Accumulated Other Comprehensive Loss |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Balance, at the beginning of the period |  |  | (11) | (29)
Net income (loss) |  |  | 0 | 0
Other comprehensive income (loss) |  |  | 3 | (1)
Common stock dividends declared |  |  | 0 | 0
Dividends on preferred and preference stock |  |  | 0 | 0
Stock-based compensation and other |  |  | 0 | 0
Noncash stock-based compensation and other |  |  | 0 | 0
Issuance of preference stock |  |  | 0 | 0
Redemption of preference stock |  |  |  | 0
Balance, at the end of the period | (8) | (30) | (8) | (30)
Southern California Edison | Retained Earnings |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Balance, at the beginning of the period |  |  | 7,594 | 7,228
Net income (loss) |  |  | 626 | 216
Other comprehensive income (loss) |  |  | 0 | 0
Common stock dividends declared |  |  | (252) | (240)
Dividends on preferred and preference stock |  |  | (57) | (51)
Stock-based compensation and other |  |  | (42) | (35)
Noncash stock-based compensation and other |  |  | (2) | 5
Issuance of preference stock |  |  | 0 | 0
Redemption of preference stock |  |  |  | (8)
Balance, at the end of the period | 7,867 | 7,115 | 7,867 | 7,115
Southern California Edison | Preferred Stock and Preference Stock |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Balance, at the beginning of the period |  |  | 1,795 | 1,795
Net income (loss) |  |  | 0 | 0
Other comprehensive income (loss) |  |  | 0 | 0
Common stock dividends declared |  |  | 0 | 0
Dividends on preferred and preference stock |  |  | 0 | 0
Stock-based compensation and other |  |  | 0 | 0
Noncash stock-based compensation and other |  |  | 0 | 0
Issuance of preference stock |  |  | 275 | 400
Redemption of preference stock |  |  |  | (400)
Balance, at the end of the period | $ 2,070 | $ 1,795 | $ 2,070 | $ 1,795

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