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Organization, Basis Of Presentation And Summary Of Significant Accounting Policies (Amounts And Average Rates Used To Calculate IDC Or AFUDC) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
PSE&G [Member] |  |  |
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |
IDC/AFUDC | $ 73 | $ 66 | $ 65
Average Rate | 7.42% | 7.81% | 8.01%
Power [Member] |  |  |
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |
IDC/AFUDC | $ 78 | $ 54 | $ 27
Average Rate | 4.60% | 4.87% | 5.14%

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