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Debt and Credit Facilities - Changes in Long-Term Debt - Additional Information (Detail) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Debt Instrument [Line Items]
Issuance of Long-Term Debt	$ 3,600	$ 3,350
Repayments of Long-term Debt	2,150	1,250
Public Service Electric and Gas Company [Member]
Debt Instrument [Line Items]
Issuance of Long-Term Debt	1,350	2,100
Repayments of Long-term Debt	350	$ 500
Senior Notes Four Point Nine Zero Due Two Thousand Thirty [Member]
Debt Instrument [Line Items]
Issuance of Long-Term Debt	$ 600
Debt Instrument, Interest Rate, Stated Percentage	4.90%
Senior Notes Five Point Four Zero Due Two Thousand Thirty Five [Member]
Debt Instrument [Line Items]
Issuance of Long-Term Debt	$ 400
Debt Instrument, Interest Rate, Stated Percentage	5.40%
Medium Term Notes Five Point Zero Five Due Two Thousand Thirty Five [Member] | Public Service Electric and Gas Company [Member]
Debt Instrument [Line Items]
Issuance of Long-Term Debt	$ 400
Debt Instrument, Interest Rate, Stated Percentage	5.05%
Medium Term Notes Five Point Five Zero Due Two Thousand Fifty Five [Member] | Public Service Electric and Gas Company [Member]
Debt Instrument [Line Items]
Issuance of Long-Term Debt	$ 500
Debt Instrument, Interest Rate, Stated Percentage	5.50%
Medium Term Notes Four Point Nine Zero Due Two Thousand Thirty Five [Member] | Public Service Electric and Gas Company [Member]
Debt Instrument [Line Items]
Issuance of Long-Term Debt	$ 450
Debt Instrument, Interest Rate, Stated Percentage	4.90%
Medium Term Notes Three Point Zero Zero Percent due Two Thousand Twenty Five [Member] | Public Service Electric and Gas Company [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.00%
Repayments of Long-term Debt	$ 350
Senior Unsecured Notes Due Two Thousand Thirty [Member] | PSEG Power [Member]
Debt Instrument [Line Items]
Issuance of Long-Term Debt	$ 750
Debt Instrument, Interest Rate, Stated Percentage	5.20%
Senior Unsecured Notes Due Two Thousand Thirty Five [Member] | PSEG Power [Member]
Debt Instrument [Line Items]
Issuance of Long-Term Debt	$ 500
Debt Instrument, Interest Rate, Stated Percentage	5.75%
June Two Thousand Twenty Five Term Loan [Member] | PSEG Power [Member]
Debt Instrument [Line Items]
Repayments of Long-term Debt	$ 1,250
Senior Notes Zero Point Eight Zero Due 2025 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.80%
Repayments of Long-term Debt	$ 550

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