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Long-Term Investments (Equity Method Investments) (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019
Long-Term Investments [Line Items] |  |  |
Long-Term Investments |  | $ 536 | $ 812
Kalaeloa [Member] |  |  |
Long-Term Investments [Line Items] |  |  |
Owned percentage |  | 50.00% |
PSEG Power LLC |  |  |
Long-Term Investments [Line Items] |  |  |
Long-Term Investments |  | $ 64 | 66
Partnerships And Corporate Joint Ventures [Member] | PSEG Power LLC |  |  |
Long-Term Investments [Line Items] |  |  |
Long-Term Investments | [1] | 64 | 66
Partnerships And Corporate Joint Ventures [Member] | PSEG Power LLC | Kalaeloa [Member] |  |  |
Long-Term Investments [Line Items] |  |  |
Long-Term Investments |  | $ 64 | $ 66
[1] | During the three years ended December 31, 2020, 2019 and 2018, dividends from these investments were $15 million, $15 million and $16 million, respectively.

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- Definition The total amount of investments that are intended to be held for an extended period of time (longer than one operating cycle). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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