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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, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Public Service Electric and Gas Company |  |  |
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |
IDC/AFUDC | $ 81 | $ 70 | $ 73
Average Rate | 7.22% | 7.74% | 7.42%
PSEG Power LLC |  |  |
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |
IDC/AFUDC | $ 27 | $ 67 | $ 78
Average Rate | 4.60% | 4.60% | 4.60%

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