Rate Filings (Details)	1 Months Ended								9 Months Ended	12 Months Ended
	Oct. 31, 2023 USD ($)	Sep. 30, 2023 USD ($)	Jul. 31, 2023 USD ($)	Jun. 30, 2023 USD ($)	May 31, 2023 USD ($)	Apr. 30, 2023 USD ($)	Feb. 28, 2023 USD ($)	Jan. 31, 2023 USD ($)	Sep. 30, 2023 USD ($)	May 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets		$ 4,911,000,000							$ 4,911,000,000		$ 4,404,000,000
Regulatory Assets		257,000,000							257,000,000		369,000,000
ZEC Charge per MWh									10
Public Service Electric and Gas Company [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets		4,911,000,000							4,911,000,000		4,404,000,000
Regulatory Assets		257,000,000							257,000,000		$ 369,000,000
Public Service Electric and Gas Company [Member] | ZEC Liability
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount								$ (1,300,000)
ZEC purchases					$ 165,000,000					$ 165,000,000
ZEC Charge per MWh										$ 9.88
Public Service Electric and Gas Company [Member] | COVID-19 Deferral - Bad Debt portion
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets		$ 68,000,000							$ 68,000,000
Public Service Electric and Gas Company [Member] | Gas System Modernization Program II [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount					11,000,000
Public Service Electric and Gas Company [Member] | Basic Gas Supply Service
Regulatory Assets And Liabilities [Line Items]
Approved BGSS rate per therm		0.40				0.47			0.40		0.65
BGSS self implementing increase (decrease)		(0.25)					(0.03)	(0.15)	(0.25)
Public Service Electric and Gas Company [Member] | Energy Strong II Electric
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount						$ 16,000,000
Public Service Electric and Gas Company [Member] | Energy Strong II Gas
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount						4,000,000
Public Service Electric and Gas Company [Member] | Conservation Incentive Program
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount		$ 110,000,000				$ 53,000,000
Public Service Electric and Gas Company [Member] | Conservation Incentive Program First Twelve Months
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount							$ 18,000,000
Public Service Electric and Gas Company [Member] | Conservation Incentive Program After Twelve Months
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount							34,000,000
Public Service Electric and Gas Company [Member] | Pension Ratemaking deferral
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets		43,000,000							$ 43,000,000
Public Service Electric and Gas Company [Member] | Conservation Incentive Program Electric
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount					72,000,000		$ 52,000,000
Public Service Electric and Gas Company [Member] | Conservation Incentive Program Gas After Twelve Months
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount		11,000,000
Public Service Electric and Gas Company [Member] | Conservation Incentive Program Gas First Twelve Months
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount		99,000,000
Public Service Electric and Gas Company [Member] | Electric Green Program Recovery [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount					87,000,000
Public Utilities, Requested Rate Increase (Decrease), Amount				$ 38,000,000
Public Service Electric and Gas Company [Member] | Gas Green Program Recovery [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount					5,000,000
Public Utilities, Requested Rate Increase (Decrease), Amount				20,000,000
Public Service Electric and Gas Company [Member] | Clean Energy Future
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount					$ 280,000,000
Public Service Electric and Gas Company [Member] | Formula Rate True up
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount				$ (21,000,000)
COVID-19 deferrals [Member] | Public Service Electric and Gas Company [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets		131,000,000							$ 131,000,000
Remediation Adjustment Clause | Public Service Electric and Gas Company [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount								$ 44,000,000
Electric Societal Benefits Clause | Public Service Electric and Gas Company [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount								52,000,000
Gas Societal Benefit Clause | Public Service Electric and Gas Company [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount								$ 32,000,000
Tax Adjustment Credits Gas Distribution [Member] | Public Service Electric and Gas Company [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount			$ (42,000,000)
Public Utilities, Requested Rate Increase (Decrease), Amount		44,000,000
Tax Adjustment Credits Electric Distribution [Member] | Public Service Electric and Gas Company [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount			$ 17,000,000
Public Utilities, Requested Rate Increase (Decrease), Amount		$ 61,000,000
Subsequent Event [Member] | Public Service Electric and Gas Company [Member] | Energy Strong II Electric
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount	$ 9,000,000
Subsequent Event [Member] | Public Service Electric and Gas Company [Member] | Formula Rate True up
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount	$ 58,000,000