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Debt and Credit Facilities - Changes in Long-Term Debt - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Issuance of Long-term Debt		$ 3,350	$ 2,800	$ 2,850
Proceeds from Short-Term Loans		400	750	2,000
Repayments of Long-term Debt		1,500	1,575	700
December 2024 Term Loan [Member]
Debt Instrument [Line Items]
Proceeds from Short-Term Loans	$ 400
Public Service Electric and Gas Company [Member]
Debt Instrument [Line Items]
Issuance of Long-term Debt		2,100	1,800	900
Repayments of Long-term Debt		750	$ 825	$ 0
PSEG Power | December 2024 Term Loan [Member]
Debt Instrument [Line Items]
Proceeds from Short-Term Loans	$ 1,250
Senior Notes Five Point Two Zero Due Two Thousand Twenty Nine [Member]
Debt Instrument [Line Items]
Issuance of Long-term Debt		$ 750
Debt Instrument, Interest Rate, Stated Percentage	5.20%	5.20%
Senior Notes Five Point Four Five due Two Thousand Thirty Four [Member]
Debt Instrument [Line Items]
Issuance of Long-term Debt		$ 500
Debt Instrument, Interest Rate, Stated Percentage	5.45%	5.45%
Senior Notes Two Point Eight Eight Percent due 2024 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.88%	2.88%
Repayments of Long-term Debt		$ 750
Medium Term Notes Five Point Two Zero due Two Thousand Thirty Four [Member] | 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%	5.20%
Medium Term Notes Five Point Four Five Percent due Two Thousand Fifty Four [Member] | 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%	5.45%
Medium Term Notes Four Point Eight Five Percent due Two Thousand Thirty Four [Member] | Public Service Electric and Gas Company [Member]
Debt Instrument [Line Items]
Issuance of Long-term Debt		$ 600
Debt Instrument, Interest Rate, Stated Percentage	4.85%	4.85%
Medium Term Notes Five Point Three Zero Percent due Two Thousand Fifty Four [Member] | Public Service Electric and Gas Company [Member]
Debt Instrument [Line Items]
Issuance of Long-term Debt		$ 500
Debt Instrument, Interest Rate, Stated Percentage	5.30%	5.30%
Medium Term Notes Three Point Seven Five Percent due Two Thousand Twenty Four [Member] | Public Service Electric and Gas Company [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.75%	3.75%
Repayments of Long-term Debt		$ 250
Medium Term Notes Three Point One Five Percent due Two Thousand Twenty Four [Member] | Public Service Electric and Gas Company [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.15%	3.15%
Repayments of Long-term Debt		$ 250
Medium-Term Notes Three Point Zero Five Percent Due in Two Thousand Twenty Four [Member] | Public Service Electric and Gas Company [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.05%	3.05%
Repayments of Long-term Debt		$ 250

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