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Organization, Basis Of Presentation And Summary Of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
TEFA |  |  |  |  |  |  |  |  | $ 0 | $ 0 | $ 68
Operating Revenues | $ 2,278 | $ 2,688 | $ 2,314 | $ 3,135 | $ 2,773 | $ 2,641 | $ 2,249 | $ 3,223 | 10,415 | 10,886 | 9,968
Net Income |  |  |  |  |  |  |  |  | 1,679 | 1,518 | 1,243
Total Assets | 37,535 |  |  |  | 35,287 |  |  |  | 37,535 | 35,287 | 32,480
Power [Member] |  |  |  |  |  |  |  |  |  |  |
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating Revenues | 1,082 | 1,096 | 1,025 | 1,725 | 1,610 | 1,138 | 986 | 1,700 | 4,928 | 5,434 | 5,063
Basis Adjustment | (986) |  |  |  | (986) |  |  |  | (986) | (986) |
Net Income |  |  |  |  |  |  |  |  | 856 | 760 | 644
Total Assets | 12,250 |  |  |  | 12,037 |  |  |  | $ 12,250 | 12,037 |
Power [Member] | Nuclear Production [Member] |  |  |  |  |  |  |  |  |  |  |
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives |  |  |  |  |  |  |  |  | 60 years |  |
Power [Member] | Pumped Storage Facilities [Member] |  |  |  |  |  |  |  |  |  |  |
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives |  |  |  |  |  |  |  |  | 76 years |  |
Power [Member] | Solar Assets [Member] |  |  |  |  |  |  |  |  |  |  |
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives |  |  |  |  |  |  |  |  | 25 years |  |
Power [Member] | Minimum [Member] | General Plant Assets [Member] |  |  |  |  |  |  |  |  |  |  |
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives |  |  |  |  |  |  |  |  | 3 years |  |
Power [Member] | Minimum [Member] | Fossil Production [Member] |  |  |  |  |  |  |  |  |  |  |
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives |  |  |  |  |  |  |  |  | 19 years |  |
Power [Member] | Maximum [Member] | General Plant Assets [Member] |  |  |  |  |  |  |  |  |  |  |
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives |  |  |  |  |  |  |  |  | 20 years |  |
Power [Member] | Maximum [Member] | Fossil Production [Member] |  |  |  |  |  |  |  |  |  |  |
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives |  |  |  |  |  |  |  |  | 79 years |  |
PSE&G [Member] |  |  |  |  |  |  |  |  |  |  |
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
TEFA |  |  |  |  |  |  |  |  | $ 0 | 0 | 68
Operating Revenues | 1,402 | $ 1,766 | $ 1,466 | $ 2,002 | 1,531 | $ 1,655 | $ 1,435 | $ 2,145 | 6,636 | 6,766 | 6,655
Basis Adjustment | 986 |  |  |  | 986 |  |  |  | 986 | 986 |
Net Income |  |  |  |  |  |  |  |  | 787 | 725 | 612
Total Assets | $ 23,677 |  |  |  | $ 22,186 |  |  |  | $ 23,677 | $ 22,186 |
Operating Revenues [Member] |  |  |  |  |  |  |  |  |  |  |
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
TEFA |  |  |  |  |  |  |  |  |  |  | 74
Tefa And Grt [Member] |  |  |  |  |  |  |  |  |  |  |
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
TEFA |  |  |  |  |  |  |  |  |  |  | $ 68

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