Regulatory Assets And Liabilities (Schedule Of Regulatory Assets and Liabilities) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Sep. 30, 2018
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Current	$ 364	$ 369
Regulatory Assets, Noncurrent	3,605	3,872
Regulatory Liability, Current	388	294
Regulatory Liabilities, Noncurrent	2,497	2,707
Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Current	364	369
Regulatory Assets, Noncurrent	3,605	3,872
Total Regulatory Assets	3,969	4,241
Regulatory Liability, Current	388	294
Regulatory Liabilities, Noncurrent	2,497	2,707
Total Regulatory Liabilities	2,885	3,001
Flowback of tax benefits	22	31	$ 58
Excess Deferred Income Taxes [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Regulatory Liability, Current	288	250
Regulatory Liabilities, Noncurrent	2,443	2,670
Other [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Regulatory Liability, Current	23	6
Regulatory Liabilities, Noncurrent	54	37
ZEC Liability | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Regulatory Liability, Current	11	17
Tax Adjustment Credit [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Current	44	0
Total Regulatory Assets				$ 581
Total Regulatory Liabilities				$ 581
New Jersey Clean Energy Program [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Current	146	143
Green Program Recovery Charge [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Noncurrent	211	139
Regulatory Liability, Current	19	1
Pension and Other Postretirement Benefit Costs [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Noncurrent	1,043	1,489
Deferred Income Taxes [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Noncurrent	1,064	1,014
Manufactured Gas Plant (MGP) Remediation Costs [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Noncurrent	220	320
Base Rate Case [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Current	56	56
Regulatory Assets, Noncurrent	47	103
Remediation Adjustment Charge (Other SBC) [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Noncurrent	156	134
Conditional Asset Retirement Obligation [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Noncurrent	191	184
Electric and Gas Cost Of Removal [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Noncurrent	174	189
Other [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Current	2	5
Regulatory Assets, Noncurrent	135	150
Underrecovered Electric Costs Basic Generation Service [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Current	67	60
Societal Benefits Charges Sbc [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Current	0	82
Regulatory Assets, Noncurrent	139	0
Formula Rate True up | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Current	13	23
Regulatory Liability, Current	42	0
Deferred Storm Costs | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Noncurrent	109	99
COVID-19 Deferral | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Noncurrent	116	51
Gas Costs - BGSS | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Regulatory Liability, Current	5	20
Conservation Incentive Program | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Current	36	$ 0
Transmission related over remaining useful life [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Excess Deferred income taxes to be refunded	939
unprotected distribution related over remaining useful life [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Excess Deferred income taxes to be refunded	371
protected distribution related over remaining useful life [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Excess Deferred income taxes to be refunded	905
distributed related repair deductions [Member] | Public Service Electric and Gas Company
Regulatory Assets And Liabilities [Line Items]
Excess Deferred income taxes to be refunded	$ 462