Debt and Credit Facilities (Changes in Long-Term Debt) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Debt Instrument [Line Items]
Issuance of Long-term Debt	$ 2,250	$ 900
Repayments of Long-term Debt	250	0
Public Service Electric and Gas Company [Member]
Debt Instrument [Line Items]
Issuance of Long-term Debt	1,000	900
Repayments of Long-term Debt	250	$ 0
Three Year Variable rate term loan | PSEG Power [Member]
Debt Instrument [Line Items]
Issuance of Long-term Debt	1,250
Senior Notes Five Point Two Zero Due Two Thousand Twenty Nine
Debt Instrument [Line Items]
Issuance of Long-term Debt	$ 750
Debt Instrument, Interest Rate, Stated Percentage	5.20%
Senior Notes Five Point Four Five due Two Thousand Thirty Four
Debt Instrument [Line Items]
Issuance of Long-term Debt	$ 500
Debt Instrument, Interest Rate, Stated Percentage	5.45%
Medium Term Notes Five Point Two Zero due Two Thousand Thirty Four | Public Service Electric and Gas Company [Member]
Debt Instrument [Line Items]
Issuance of Long-term Debt	$ 450
Debt Instrument, Interest Rate, Stated Percentage	5.20%
Medium Term Notes Five Point Four Five Percent due Two Thousand Fifty Four | Public Service Electric and Gas Company [Member]
Debt Instrument [Line Items]
Issuance of Long-term Debt	$ 550
Debt Instrument, Interest Rate, Stated Percentage	5.45%
Medium Term Notes Three Point Seven Five Percent due Two Thousand Twenty Four | Public Service Electric and Gas Company [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.75%
Repayments of Long-term Debt	$ 250