Debt and Credit Facilities - Changes in Long-Term Debt - Additional Information (Detail) - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024
Debt Instrument [Line Items]
Issuance of Long-Term Debt	$ 3,150	$ 2,250
Repayments of Long-term Debt	1,600	1,000
Public Service Electric and Gas Company [Member]
Debt Instrument [Line Items]
Issuance of Long-Term Debt	900	1,000
Repayments of Long-term Debt	350	$ 250
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 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

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

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