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v3.23.1

Debt and Credit Facilities (Changes in Long-Term Debt) (Detail) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2023 | Mar. 31, 2022
Debt Instrument [Line Items] |  |
Issuance of Long-term Debt | $ 900 | $ 1,750
Public Service Electric and Gas Company [Member] |  |
Debt Instrument [Line Items] |  |
Issuance of Long-term Debt | 900 | $ 500
Three Year Variable rate term loan | PSEG Power [Member] |  |
Debt Instrument [Line Items] |  |
Issuance of Long-term Debt | 1,250 |
Medium Term Notes Green Bond Four Point Six Five Percent due Two Thousand Thirty Three | Public Service Electric and Gas Company [Member] |  |
Debt Instrument [Line Items] |  |
Issuance of Long-term Debt | $ 500 |
Debt Instrument, Interest Rate, Stated Percentage | 4.65% |
Medium Term Notes Green Bond Five Point One Three Percent due Two Thousand Fifty Three | Public Service Electric and Gas Company [Member] |  |
Debt Instrument [Line Items] |  |
Issuance of Long-term Debt | $ 400 |
Debt Instrument, Interest Rate, Stated Percentage | 5.13% |

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