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Consolidated Statements Of Stockholders' Equity - USD ($) shares in Millions, $ in Millions | Total | Common Stock [Member] | Treasury Stock [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Noncontrolling Interest [Member] | PSE&G [Member] | PSE&G [Member] Common Stock [Member] | PSE&G [Member] Contributed Capital [Member] | PSE&G [Member] Basis Adjustment [Member] | PSE&G [Member] Retained Earnings [Member] | PSE&G [Member] Accumulated Other Comprehensive Income (Loss) [Member] | Power [Member] | Power [Member] Contributed Capital [Member] | Power [Member] Basis Adjustment [Member] | Power [Member] Retained Earnings [Member] | Power [Member] Accumulated Other Comprehensive Income (Loss) [Member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning Balance (in value) at Dec. 31, 2014 | $ 12,186 | $ 4,876 | $ (635) | $ 8,227 | $ (283) | $ 1 | $ 6,787 | $ 892 | $ 695 | $ 986 | $ 4,212 | $ 2 | $ 5,558 | $ 2,214 | $ (986) | $ 4,558 | $ (228)
Beginning Balance, shares at Dec. 31, 2014 |  | 534 | (28) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net Income | 1,679 |  |  | 1,679 |  |  | 787 |  |  |  | 787 |  | 856 |  |  | 856 |
Other Comprehensive Income (Loss), net of tax |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other Comprehensive Income (Loss), net of tax | (12) |  |  |  | (12) | 0 | (1) |  |  |  |  | (1) | (12) |  |  |  | (12)
Comprehensive Income | 1,667 |  |  |  |  |  | 786 |  |  |  |  |  | 844 |  |  |  |
Contributed Capital |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  |  |
Cash Dividends on Common Stock | (789) |  |  | (789) | 0 | 0 |  |  |  |  |  |  | (400) |  |  | (400) |
Other | 3 | $ 39 | $ (36) | 0 | 0 | 0 |  |  |  |  |  |  |  |  |  |  |
Treasury Stock, Shares, Acquired |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending Balance (in value) at Dec. 31, 2015 | 13,067 | $ 4,915 | $ (671) | 9,117 | (295) | 1 | 7,573 | 892 | 695 | 986 | 4,999 | 1 | 6,002 | 2,214 | (986) | 5,014 | (240)
Ending Balance, shares at Dec. 31, 2015 |  | 534 | (28) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net Income | 887 |  |  | 887 |  |  | 889 |  |  |  | 889 |  | 18 |  |  | 18 |
Other Comprehensive Income (Loss), net of tax |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other Comprehensive Income (Loss), net of tax | 32 |  |  |  | 32 |  | 0 |  |  |  |  | 0 | 29 |  |  |  | 29
Comprehensive Income | 919 |  |  |  |  |  | 889 |  |  |  |  |  | 47 |  |  |  |
Contributed Capital |  |  |  |  |  |  | 250 |  |  |  |  |  |  |  |  |  |
Cash Dividends on Common Stock | (830) |  |  | (830) |  |  |  |  |  |  |  |  | (250) |  |  | (250) |
Other | (26) | $ 21 | $ (46) |  |  | 1 |  |  |  |  |  |  |  |  |  |  |
Treasury Stock, Shares, Acquired |  |  | (1) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending Balance (in value) at Dec. 31, 2016 | 13,130 | $ 4,936 | $ (717) | 9,174 | (263) | 0 | 8,712 | 892 | 945 | 986 | 5,888 | 1 | 5,799 | 2,214 | (986) | 4,782 | (211)
Ending Balance, shares at Dec. 31, 2016 |  | 534 | (29) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net Income | 1,574 |  |  | 1,574 |  |  | 973 |  |  |  | 973 |  | 479 |  |  | 479 |
Other Comprehensive Income (Loss), net of tax |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other Comprehensive Income (Loss), net of tax | 34 |  |  |  | 34 |  | (1) |  |  |  |  | (1) | 39 |  |  |  | 39
Comprehensive Income | 1,608 |  |  |  |  |  | 972 |  |  |  |  |  | 518 |  |  |  |
Contributed Capital |  |  |  |  |  |  | 150 |  |  |  |  |  |  |  |  |  |
Cash Dividends on Common Stock | (870) |  |  | (870) |  |  |  |  |  |  |  |  | (350) |  |  | (350) |
Other | (21) | $ 25 | $ (46) |  |  | 0 |  |  |  |  |  |  |  |  |  |  |
Treasury Stock, Shares, Acquired |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending Balance (in value) at Dec. 31, 2017 | $ 13,847 | $ 4,961 | $ (763) | $ 9,878 | $ (229) | $ 0 | $ 9,834 | $ 892 | $ 1,095 | $ 986 | $ 6,861 | $ 0 | $ 5,967 | $ 2,214 | $ (986) | $ 4,911 | $ (172)
Ending Balance, shares at Dec. 31, 2017 |  | 534 | (29) |  |  |  |  |  |  |  |  |  |  |  |  |  |

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