Debt and Credit Facilities (Changes in Long-Term Debt) (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Debt Instrument [Line Items]
Issuance of Long-term Debt	$ 900	$ 1,750
Repayments of Long-term Debt	500	0
Public Service Electric and Gas Company [Member]
Debt Instrument [Line Items]
Issuance of Long-term Debt	900	500
Repayments of Long-term Debt	500	$ 0
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%
Medium Term Notes Two Point Three Eight Percent Due In Two Thousand Twenty Three | Public Service Electric and Gas Company [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.38%
Repayments of Long-term Debt	$ 500