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v3.22.1

Debt and Credit Facilities (Changes in Long-Term Debt) (Detail) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021
Debt Instrument [Line Items] |  |
Issuance of Long-term Debt | $ 1,750 | $ 900
Public Service Electric and Gas Company [Member] |  |
Debt Instrument [Line Items] |  |
Issuance of Long-term Debt | 500 | $ 900
Medium Term Notes Green Bond Three Point One Zero due Two Thousand Thirty Two | Public Service Electric and Gas Company [Member] |  |
Debt Instrument [Line Items] |  |
Issuance of Long-term Debt | $ 500 |
Debt Instrument, Interest Rate, Stated Percentage | 3.10% |
Three Year Variable rate term loan | PSEG Power [Member] |  |
Debt Instrument [Line Items] |  |
Issuance of Long-term Debt | $ 1,250 |

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