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Long-Term Investments (Schedule Of Long Term Investments) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Long-Term Investments [Line Items] |  |  |  |  |
Pretax gain on REMA restructuring |  |  | $ 12.0 |  |
Total Long-Term Investments |  |  | 896.0 | $ 932.0 |
Dividends in equity method investments |  |  | 16.0 | 18.0 | $ 18.0
Provision for Loan and Lease Losses |  |  |  | 7.0 | 137.0
Financing Receivable, Allowance for Credit Losses, Write-downs |  |  | 20.0 | 77.0 | $ 147.0
After tax gain on REMA restructuring |  |  | 9.0 |  |
Expected claim proceeds |  |  | 31.5 |  |
REMA Funded credit support |  |  | 36.0 |  |
Power [Member] |  |  |  |  |
Long-Term Investments [Line Items] |  |  |  |  |
Total Long-Term Investments |  |  | 86.0 | 87.0 |
PSE&G [Member] |  |  |  |  |
Long-Term Investments [Line Items] |  |  |  |  |
Total Long-Term Investments |  |  | 270.0 | 280.0 |
Life Insurance And Supplemental Benefits [Member] | PSE&G [Member] |  |  |  |  |
Long-Term Investments [Line Items] |  |  |  |  |
Total Long-Term Investments |  |  | 121.0 | 130.0 |
Solar Loan Investments [Member] | PSE&G [Member] |  |  |  |  |
Long-Term Investments [Line Items] |  |  |  |  |
Total Long-Term Investments |  |  | 149.0 | 150.0 |
Lease Investments [Member] | Energy Holdings [Member] |  |  |  |  |
Long-Term Investments [Line Items] |  |  |  |  |
Total Long-Term Investments |  |  | 540.0 | 565.0 |
Partnerships And Corporate Joint Ventures [Member] | Power [Member] |  |  |  |  |
Long-Term Investments [Line Items] |  |  |  |  |
Total Long-Term Investments | [1] |  | $ 86.0 | $ 87.0 |
Subsequent Event [Member] |  |  |  |  |
Long-Term Investments [Line Items] |  |  |  |  |
Expected tax payment for REMA restructuring |  | $ 120.0 |  |  |
[1] | During the three years ended December 31, 2018, 2017 and 2016, dividends from these investments were $16 million, $18 million and $18 million, respectively.

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