Regulatory Assets And Liabilities (Significant Orders and Pending Filings) (Details)	1 Months Ended											12 Months Ended
	Feb. 28, 2022 USD ($)	Dec. 31, 2021 USD ($)	Nov. 30, 2021 USD ($)	Oct. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Aug. 31, 2021 USD ($)	Jul. 31, 2021 USD ($)	Jun. 30, 2021 USD ($)	May 31, 2021 USD ($)	Apr. 30, 2021 USD ($)	Jan. 31, 2021 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Feb. 01, 2022	Nov. 01, 2021	Mar. 31, 2021	Dec. 31, 2020 USD ($)	Sep. 30, 2018 USD ($)
Regulatory Assets And Liabilities [Line Items]
ZEC Charge per kwh													$ 0.004
Regulatory Assets		$ 3,605,000,000											3,605,000,000				$ 3,872,000,000
Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Proposed BGSS rate per therm								0.32
BGSS balancing charge								0.086							0.093
Regulatory Assets		3,969,000,000											3,969,000,000				4,241,000,000
Regulatory Assets		3,605,000,000											3,605,000,000				3,872,000,000
Public Service Electric and Gas Company | Weather Normalization Clause [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount					$ (2,000,000)
Public Service Electric and Gas Company | ZEC Liability
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount				$ (4,000,000)
ZEC purchases													157,000,000
Tax Adjustment Credits Electric Distribution [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount						$ (22,000,000)
Public Utilities, Requested Rate Increase (Decrease), Amount				(15,000,000)
Tax Adjustment Credits Gas Distribution [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount						$ 57,000,000
Public Utilities, Requested Rate Increase (Decrease), Amount				$ (31,000,000)
Remediation Adjustment Clause [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount							$ 35,000,000
Clean Energy Future - Energy Cloud [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Public Utilities, approved investment											$ 707,000,000
Clean Energy Future - Electric Vehicles [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Public Utilities, approved investment											$ 166,000,000
Solar or EE Recovery Charge (RRC) [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets		211,000,000											211,000,000				139,000,000
Societal Benefits Charges Sbc [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets		139,000,000											139,000,000				0
Societal Benefits Charges Sbc [Member] | Electric Bad Debt Deferral | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets		139,000,000											139,000,000
Tax Adjustment Credit [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets																		$ 581,000,000
COVID-19 Deferral | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets		116,000,000											116,000,000				$ 51,000,000
COVID-19 Deferral - Bad Debt portion [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets		64,000,000											64,000,000
Energy Strong II [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount										$ 13,000,000
Gas System Modernization Program II [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount			$ 28,000,000						$ 21,000,000
Public Utilities, Requested Rate Increase (Decrease), Amount		$ 27,000,000
Formula Rate True up | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount								$ 13,000,000
Public Utility Revenue Reduction													$ 64,000,000
Formula Rate True up | Subsequent Event [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Public Utility Revenue Reduction												$ 150,000,000
Green Program Recovery electric portion [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount									$ 400,000
Basic Gas Supply Service | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Approved BGSS rate per therm		0.36											0.36			0.32
Public Utilities, Approved Rate Increase (Decrease), Percentage			5.00%
Basic Gas Supply Service | Subsequent Event [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Approved BGSS rate per therm														0.41
Gas Green Program Recovery [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount							2,000,000
Electric Green Program Recovery [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount							$ 2,000,000
Transmission Formula Rate [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Return on Equity, Percentage						9.90%	11.18%
Conservation Incentive Program | Subsequent Event [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount	$ 52,000,000
Energy Strong II Electric | Subsequent Event [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount	15,000,000
Energy Strong II Gas | Subsequent Event [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount	$ 1,000,000
SREC II | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount		$ 38,000,000