Contractual interest rate for funds borrowed, under the debt agreement.

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Debt and Credit Facilities (Changes in Long-Term Debt) (Detail) - USD ($) $ in Millions	1 Months Ended	6 Months Ended
	Aug. 31, 2021	Jun. 30, 2021	Jun. 30, 2020
Debt Instrument [Line Items]
Issuance of Long-term Debt		$ 900	$ 975
Public Service Electric and Gas Company [Member]
Debt Instrument [Line Items]
Issuance of Long-term Debt		900	$ 975
Medium Term Notes Zero Point Nine Five due Two Thousand Twenty Six \| Public Service Electric and Gas Company [Member]
Debt Instrument [Line Items]
Issuance of Long-term Debt		$ 450
Debt Instrument, Interest Rate, Stated Percentage		0.95%
Medium Term Notes Three Point Zero due Two Thousand Fifty One \| Public Service Electric and Gas Company [Member]
Debt Instrument [Line Items]
Issuance of Long-term Debt		$ 450
Debt Instrument, Interest Rate, Stated Percentage		3.00%
Medium Term Notes One Point Nine Zero Percent Due In Two Thousand Twenty One \| Public Service Electric and Gas Company [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		1.90%
Repayments of Long-term Debt		$ 300
First And Refunding Mortgage Bonds Nine Point Two Five Percentage Due On Two Twenty One \| Public Service Electric and Gas Company [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		9.25%
Repayments of Long-term Debt		$ 134
Senior Notes Four Point One Five Percentage Due Two Thousand Twenty One \| PSEG Power [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.00%
Repayments of Long-term Debt		$ 700
Senior Notes Three Point Zero Percent Due In Two Thousand Twenty One \| PSEG Power [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.15%
Repayments of Long-term Debt		$ 250
Subsequent Event [Member] \| Pollution Control Notes Floating Rate Due On Two Thousand Fourteen \| PSEG Power [Member]
Debt Instrument [Line Items]
Repayments of Long-term Debt	$ 44