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Organization, Basis Of Presentation And Summary Of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
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Power [Member] |  |
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |
Basis Adjustment | $ (986) | $ (986)
PSE&G [Member] |  |
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |
Basis Adjustment | $ 986 | $ 986

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