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Consolidated Statements of Changes in Equity (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Balance, at the beginning of the period |  |  | $ 12,982 | $ 11,691
Net income |  |  | 734 | 768
Other comprehensive income (loss) | $ 3 | $ (2) | 2 | 0
Common stock dividends declared |  |  | (272) | (231)
Dividends to noncontrolling interests |  |  | (56) | (57)
Stock-based compensation |  |  | (55) | (51)
Non-cash stock-based compensation |  |  | 12 | 14
Issuance of preference stock |  |  |  | 269
Balance, at the end of the period | $ 13,347 | $ 12,403 | $ 13,347 | $ 12,403
Dividends declared per common share (in dollars per share) | $ 0.4175 | $ 0.3550 | $ 0.8350 | $ 0.7100
Common Stock |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Balance, at the beginning of the period |  |  | $ 2,445 | $ 2,403
Net income |  |  | 0 | 0
Other comprehensive income (loss) |  |  | 0 |
Common stock dividends declared |  |  | 0 | 0
Dividends to noncontrolling interests |  |  | 0 | 0
Stock-based compensation |  |  | 15 | 17
Non-cash stock-based compensation |  |  | 12 | 14
Issuance of preference stock |  |  |  | 0
Balance, at the end of the period | $ 2,472 | $ 2,434 | 2,472 | 2,434
Accumulated Other Comprehensive Loss |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Balance, at the beginning of the period |  |  | (58) | (13)
Net income |  |  | 0 | 0
Other comprehensive income (loss) |  |  | 2 |
Common stock dividends declared |  |  | 0 | 0
Dividends to noncontrolling interests |  |  | 0 | 0
Stock-based compensation |  |  | 0 | 0
Non-cash stock-based compensation |  |  | 0 | 0
Issuance of preference stock |  |  |  | 0
Balance, at the end of the period | (56) | (13) | (56) | (13)
Retained Earnings |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Balance, at the beginning of the period |  |  | 8,573 | 7,548
Net income |  |  | 678 | 712
Other comprehensive income (loss) |  |  | 0 |
Common stock dividends declared |  |  | (272) | (231)
Dividends to noncontrolling interests |  |  | 0 | 0
Stock-based compensation |  |  | (70) | (68)
Non-cash stock-based compensation |  |  | 0 | (1)
Issuance of preference stock |  |  |  | 0
Balance, at the end of the period | 8,909 | 7,960 | 8,909 | 7,960
Subtotal |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Balance, at the beginning of the period |  |  | 10,960 | 9,938
Net income |  |  | 678 | 712
Other comprehensive income (loss) |  |  | 2 |
Common stock dividends declared |  |  | (272) | (231)
Dividends to noncontrolling interests |  |  | 0 | 0
Stock-based compensation |  |  | (55) | (51)
Non-cash stock-based compensation |  |  | 12 | 13
Issuance of preference stock |  |  |  | 0
Balance, at the end of the period | 11,325 | 10,381 | 11,325 | 10,381
Preferred and preference stock |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Balance, at the beginning of the period |  |  | 2,022 | 1,753
Net income |  |  | 56 | 56
Other comprehensive income (loss) |  |  | 0 |
Common stock dividends declared |  |  | 0 | 0
Dividends to noncontrolling interests |  |  | (56) | (57)
Stock-based compensation |  |  | 0 | 0
Non-cash stock-based compensation |  |  | 0 | 1
Issuance of preference stock |  |  |  | 269
Balance, at the end of the period | 2,022 | 2,022 | 2,022 | 2,022
Southern California Edison |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Balance, at the beginning of the period |  |  | 13,282 | 12,138
Net income |  |  | 745 | 626
Other comprehensive income (loss) | 1 | 2 | 2 | 3
Common stock dividends declared |  |  | (294) | (252)
Dividends declared on preferred and preference stock |  |  | (56) | (57)
Stock-based compensation |  |  | (17) | (30)
Non-cash stock-based compensation |  |  | 6 | 3
Issuance of preference stock |  |  |  | 269
Balance, at the end of the period | 13,668 | 12,700 | 13,668 | 12,700
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 |  |  | 0 | 0
Other comprehensive income (loss) |  |  | 0 | 0
Common stock dividends declared |  |  | 0 | 0
Dividends declared on preferred and preference stock |  |  | 0 | 0
Stock-based compensation |  |  | 0 | 0
Non-cash stock-based compensation |  |  | 0 | 0
Issuance 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 |  |  | 618 | 592
Net income |  |  | 0 | 0
Other comprehensive income (loss) |  |  | 0 | 0
Common stock dividends declared |  |  | 0 | 0
Dividends declared on preferred and preference stock |  |  | 0 | 0
Stock-based compensation |  |  | 6 | 12
Non-cash stock-based compensation |  |  | 6 | 5
Issuance of preference stock |  |  |  | (6)
Balance, at the end of the period | 630 | 603 | 630 | 603
Southern California Edison | Accumulated Other Comprehensive Loss |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Balance, at the beginning of the period |  |  | (28) | (11)
Net income |  |  | 0 | 0
Other comprehensive income (loss) |  |  | 2 | 3
Common stock dividends declared |  |  | 0 | 0
Dividends declared on preferred and preference stock |  |  | 0 | 0
Stock-based compensation |  |  | 0 | 0
Non-cash stock-based compensation |  |  | 0 | 0
Issuance of preference stock |  |  |  | 0
Balance, at the end of the period | (26) | (8) | (26) | (8)
Southern California Edison | Retained Earnings |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Balance, at the beginning of the period |  |  | 8,454 | 7,594
Net income |  |  | 745 | 626
Other comprehensive income (loss) |  |  | 0 | 0
Common stock dividends declared |  |  | (294) | (252)
Dividends declared on preferred and preference stock |  |  | (56) | (57)
Stock-based compensation |  |  | (23) | (42)
Non-cash stock-based compensation |  |  | 0 | (2)
Issuance of preference stock |  |  |  | 0
Balance, at the end of the period | 8,826 | 7,867 | 8,826 | 7,867
Southern California Edison | Preferred and preference stock |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Balance, at the beginning of the period |  |  | 2,070 | 1,795
Other comprehensive income (loss) |  |  | 0 | 0
Common stock dividends declared |  |  | 0 | 0
Dividends declared on preferred and preference stock |  |  | 0 | 0
Stock-based compensation |  |  | 0 | 0
Non-cash stock-based compensation |  |  | 0 | 0
Issuance of preference stock |  |  |  | 275
Balance, at the end of the period | $ 2,070 | $ 2,070 | $ 2,070 | $ 2,070

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