Regulatory Assets And Liabilities - Additional Information (Details)	1 Months Ended										12 Months Ended
	Feb. 28, 2025 USD ($)	Jan. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Oct. 31, 2024 USD ($)	Sep. 30, 2024 USD ($)	Jun. 30, 2024 USD ($)	May 31, 2024 USD ($) $ / MWh	Apr. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Feb. 29, 2024 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Sep. 30, 2018 USD ($)
Regulatory Asset [Line Items]
Regulatory Assets			$ 6,125,000,000								$ 6,125,000,000	$ 5,157,000,000
Electric Transmission [Member]
Regulatory Asset [Line Items]
Public utilities, approved rate increase (decrease), amount				$ 64,000,000
Public Service Electric and Gas Company
Regulatory Asset [Line Items]
Regulatory Assets			6,125,000,000								6,125,000,000	5,157,000,000
Regulatory Assets			6,641,000,000								6,641,000,000	5,430,000,000
Flowback of tax benefits											81,000,000	80,000,000	$ 35,000,000
Public Service Electric and Gas Company | COVID-19 deferrals [Member]
Regulatory Asset [Line Items]
Regulatory Assets						$ 68,000,000
Regulatory Assets						131,000,000
Public Service Electric and Gas Company | Electric Transmission [Member]
Regulatory Asset [Line Items]
Public utilities, approved rate increase (decrease), amount						12,000,000
Public Service Electric and Gas Company | Distribution Base Rate [Member]
Regulatory Asset [Line Items]
Regulatory Assets					$ 509,000,000
Public utilities, approved rate base				$ 17,800,000,000
Public utilities, approved return on equity, percentage				9.60%
Public utilities, approved equity capital structure, percentage				55.00%
Public utilities, approved rate increase (decrease), amount				$ 505,000,000
Public Service Electric and Gas Company | distributed related repair deductions [Member]
Regulatory Asset [Line Items]
Excess Deferred income taxes to be refunded			840,000,000								840,000,000
Public Service Electric and Gas Company | distribution related repair deduction [Member]
Regulatory Asset [Line Items]
Excess Deferred income taxes to be refunded			310,000,000								310,000,000
Public Service Electric and Gas Company | Distribution-related mixed service cost deductions [Member]
Regulatory Asset [Line Items]
Excess Deferred income taxes to be refunded			509,000,000								509,000,000
Public Service Electric and Gas Company | Transmission related over remaining useful life [Member]
Regulatory Asset [Line Items]
Excess Deferred income taxes to be refunded			928,000,000								928,000,000
Public Service Electric and Gas Company | Base Revenues [Member] | Distribution Base Rate [Member]
Regulatory Asset [Line Items]
Public utilities, approved rate increase (decrease), amount				711,000,000
Public Service Electric and Gas Company | Return of tax benefits [Member] | Distribution Base Rate [Member]
Regulatory Asset [Line Items]
Public utilities, approved rate increase (decrease), amount				(206,000,000)
Z E C Liability [Member] | Public Service Electric and Gas Company
Regulatory Asset [Line Items]
Price Per Mega watt Hour | $ / MWh							9.95
Z E C Purchases							$ 166,000,000
Tax Adjustment Credit [Member] | Public Service Electric and Gas Company
Regulatory Asset [Line Items]
Regulatory Assets					$ 509,000,000									$ 581,000,000
Basic Gas Supply Service [Member] | Public Service Electric and Gas Company
Regulatory Asset [Line Items]
Approved BGSS rate per therm					0.33			0.40
Societal Benefits Charges Sbc [Member] | Public Service Electric and Gas Company
Regulatory Asset [Line Items]
Regulatory Assets			211,000,000								211,000,000	155,000,000
Societal Benefits Charges Sbc [Member] | Public Service Electric and Gas Company | Electric Bad Debt Deferral [Member]
Regulatory Asset [Line Items]
Regulatory Assets			78,000,000								78,000,000
Public utilities, approved rate increase (decrease), amount						78,000,000					78,000,000
Conservation Incentive Program | Public Service Electric and Gas Company
Regulatory Asset [Line Items]
Public utilities, approved rate increase (decrease), amount					$ 107,000,000
Conservation Incentive Program | Subsequent Event [Member] | Public Service Electric and Gas Company
Regulatory Asset [Line Items]
Public utilities, approved rate increase (decrease), amount	$ 96,000,000
Conservation Incentive Program Gas First Twelve Months | Subsequent Event [Member] | Public Service Electric and Gas Company
Regulatory Asset [Line Items]
Public utilities, approved rate increase (decrease), amount	65,000,000
COVID-19 Deferral [Member] | Public Service Electric and Gas Company
Regulatory Asset [Line Items]
Regulatory Assets			131,000,000								131,000,000	131,000,000
COVID-19 Deferral - Bad Debt portion [Member] | Public Service Electric and Gas Company
Regulatory Asset [Line Items]
Regulatory Assets			68,000,000			68,000,000					68,000,000
Gas System Modernization Program II [Member] | Subsequent Event [Member] | Public Service Electric and Gas Company
Regulatory Asset [Line Items]
Public utilities, approved rate increase (decrease), amount	53,000,000
Energy Strong II Electric [Member] | Public Service Electric and Gas Company
Regulatory Asset [Line Items]
Public utilities, approved rate increase (decrease), amount								$ 12,000,000
Electric Green Program Recovery [Member] | Public Service Electric and Gas Company
Regulatory Asset [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount						68,000,000
Public utilities, approved rate increase (decrease), amount						49,000,000
Gas Green Program Recovery [Member] | Public Service Electric and Gas Company
Regulatory Asset [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount						24,000,000
Public Utilities, Approved Investment, Amount				2,900,000,000
Public utilities, approved rate increase (decrease), amount				$ 3,000,000		$ 15,000,000
Clean Energy Future-EE [Member] | Public Service Electric and Gas Company
Regulatory Asset [Line Items]
Public utilities, approved rate increase (decrease), amount							300,000,000
Pension Ratemaking deferral [Member] | Public Service Electric and Gas Company
Regulatory Asset [Line Items]
Regulatory Assets			103,000,000								103,000,000	$ 55,000,000
Infrastructure Advancement Program [Member] | Public Service Electric and Gas Company
Regulatory Asset [Line Items]
Public utilities, approved rate increase (decrease), amount							$ 5,000,000
Electric Infrastructure Advancement Program [Member] | Subsequent Event [Member] | Public Service Electric and Gas Company
Regulatory Asset [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount	6,000,000
Gas Infrastructure Advancement Program [Member] | Subsequent Event [Member] | Public Service Electric and Gas Company
Regulatory Asset [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount	$ 3,000,000
Tax Adjustment Credits Electric Distribution [Member] | Public Service Electric and Gas Company
Regulatory Asset [Line Items]
Public utilities, approved rate increase (decrease), amount										$ 61,000,000	(99,000,000)
Tax Adjustment Credits Gas Distribution [Member] | Public Service Electric and Gas Company
Regulatory Asset [Line Items]
Public utilities, approved rate increase (decrease), amount										$ 40,000,000	$ (107,000,000)
Remediation Adjustment Clause [Member] | Subsequent Event [Member] | Public Service Electric and Gas Company
Regulatory Asset [Line Items]
Public utilities, approved rate increase (decrease), amount		$ 56,000,000
Electric Societal Benefits Clause [Member] | Public Service Electric and Gas Company
Regulatory Asset [Line Items]
Public utilities, approved rate increase (decrease), amount			(3,000,000)						$ 27,000,000
Gas Societal Benefit Clause [Member] | Public Service Electric and Gas Company
Regulatory Asset [Line Items]
Public utilities, approved rate increase (decrease), amount			$ 38,000,000						$ 32,000,000