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Consolidated Statements of Changes in Equity (Details) (USD $) In Millions, except Per Share data, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2014 | Mar. 31, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Balance, at the beginning of the period | $ 11,691 | $ 11,191
Net income | 202 | 298
Other comprehensive income (loss) | 2 | 0
Common stock dividends declared | (116) | (110)
Dividends, distributions to noncontrolling interests and other | (26) | (27)
Stock-based compensation and other | (41) | (32)
Noncash stock-based compensation and other | 20 | 2
Issuance of preference stock | 270 | 387
Redemption of preference stock |  | (400)
Balance, at the end of the period | 12,002 | 11,309
Dividends declared per common share (in dollars per share) | $ 0.355 | $ 0.3375
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 | 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 | 9 | 1
Noncash stock-based compensation and other | 5 | 6
Issuance of preference stock | 0 | 0
Redemption of preference stock |  | 0
Balance, at the end of the period | 2,417 | 2,380
Accumulated Other Comprehensive Loss |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Balance, at the beginning of the period | (13) | (87)
Net income | 0 | 0
Other comprehensive income (loss) | 2 |
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 | (11) | (87)
Retained Earnings |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Balance, at the beginning of the period | 7,548 | 7,146
Net income | 176 | 271
Other comprehensive income (loss) | 0 |
Common stock dividends declared | (116) | (110)
Dividends, distributions to noncontrolling interests and other | 0 | 0
Stock-based compensation and other | (50) | (33)
Noncash stock-based compensation and other | 15 | (4)
Issuance of preference stock | 0 | 0
Redemption of preference stock |  | (8)
Balance, at the end of the period | 7,573 | 7,262
Subtotal |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Balance, at the beginning of the period | 9,938 | 9,432
Net income | 176 | 271
Other comprehensive income (loss) | 2 |
Common stock dividends declared | (116) | (110)
Dividends, distributions to noncontrolling interests and other | 0 | 0
Stock-based compensation and other | (41) | (32)
Noncash stock-based compensation and other | 20 | 2
Issuance of preference stock | 0 | 0
Redemption of preference stock |  | (8)
Balance, at the end of the period | 9,979 | 9,555
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 | 26 | 27
Other comprehensive income (loss) | 0 |
Common stock dividends declared | 0 | 0
Dividends, distributions to noncontrolling interests and other | (26) | (27)
Stock-based compensation and other | 0 | 0
Noncash stock-based compensation and other | 0 | 0
Issuance of preference stock | 270 | 387
Redemption of preference stock |  | (392)
Balance, at the end of the period | 2,023 | 1,754
Southern California Edison |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Balance, at the beginning of the period | 12,138 | 11,743
Net income | 234 | 283
Other comprehensive income (loss) | 1 | (3)
Common stock dividends declared | (126) | (120)
Dividends on preferred and preference stock | (26) | (27)
Stock-based compensation and other | (22) | (29)
Noncash stock-based compensation and other | 12 | 8
Issuance of preference stock | 270 | 387
Redemption of preference stock |  | (400)
Balance, at the end of the period | 12,481 | 11,842
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 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
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 | 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 | 9 | 0
Noncash stock-based compensation and other | 2 | 3
Issuance of preference stock | (5) | (13)
Redemption of preference stock |  | 8
Balance, at the end of the period | 598 | 579
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 | 0 | 0
Other comprehensive income (loss) | 1 | (3)
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 | (10) | (32)
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 | 234 | 283
Other comprehensive income (loss) | 0 | 0
Common stock dividends declared | (126) | (120)
Dividends on preferred and preference stock | (26) | (27)
Stock-based compensation and other | (31) | (29)
Noncash stock-based compensation and other | 10 | 5
Issuance of preference stock | 0 | 0
Redemption of preference stock |  | (8)
Balance, at the end of the period | 7,655 | 7,332
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 | 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

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