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Long-Term Investments (Schedule Of Long Term Investments) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Long-Term Investments [Line Items] |  |  |  |
Total Long-Term Investments |  | $ 812 | $ 896 |
Dividends in equity method investments |  | 15 | 16 | $ 18
PSEG Power LLC |  |  |  |
Long-Term Investments [Line Items] |  |  |  |
Total Long-Term Investments |  | 66 | 86 |
Public Service Electric and Gas Company |  |  |  |
Long-Term Investments [Line Items] |  |  |  |
Total Long-Term Investments |  | 248 | 270 |
Life Insurance And Supplemental Benefits [Member] | Public Service Electric and Gas Company |  |  |  |
Long-Term Investments [Line Items] |  |  |  |
Total Long-Term Investments |  | 111 | 121 |
Solar Loan Investment [Member] | Public Service Electric and Gas Company |  |  |  |
Long-Term Investments [Line Items] |  |  |  |
Total Long-Term Investments |  | 137 | 149 |
Partnerships And Corporate Joint Ventures [Member] | PSEG Power LLC |  |  |  |
Long-Term Investments [Line Items] |  |  |  |
Total Long-Term Investments | [1] | 66 | 86 |
Partnerships And Corporate Joint Ventures [Member] | Equity Method Investments [Member] | Energy Holdings [Member] |  |  |  |
Long-Term Investments [Line Items] |  |  |  |
Total Long-Term Investments |  | 1 | 0 |
Leases [Member] | Energy Holdings [Member] |  |  |  |
Long-Term Investments [Line Items] |  |  |  |
Total Long-Term Investments |  | $ 497 | $ 540 |
[1] | During the three years ended December 31, 2019, 2018 and 2017, dividends from these investments were $15 million, $16 million and $18 million, respectively.

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