Regulatory Assets And Liabilities (Schedule Of Regulatory Assets and Liabilities) (Details) $ in Millions		1 Months Ended		3 Months Ended
		Oct. 31, 2016 USD ($)	Jun. 30, 2016 USD ($)	Dec. 31, 2016 USD ($) $ / DTH	Oct. 01, 2016	Dec. 31, 2015 USD ($)
Regulatory Assets And Liabilities [Line Items]
Regulatory Liabilities of Consolidated Variable Interest Entity, Current				$ 0		$ 42
Regulatory Assets, Current				199		164
Regulatory Assets, Noncurrent				3,319		3,196
Regulatory Liability, Current				88		123
Regulatory Liabilities, Noncurrent				118		175
PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets of Variable Interest Entities (VIEs)						0
Regulatory Liabilities of Consolidated Variable Interest Entity, Current				$ 0		42
Current BGSS rate per therm				0.40
Proposed BGSS rate per therm					0.34
Self Implementing Bill Credit per therm | $ / DTH				0.08
True-up adjustment for Transmission Formula Rate Revenues				$ (34)
Deferred Storm and Property Reserve Deficiency, Noncurrent				220
Regulatory Assets, Current				199		164
Regulatory Assets Including Consolidated Variable Interest Entities, Current				199		164
Regulatory Assets, Noncurrent				3,319		3,196
Total Noncurrent Regulatory Assets				3,319		3,196
Total Regulatory Assets				3,518		3,360
Regulatory Liability, Current				88		123
Regulatory Liabilities Including Consolidated Variable Interest Entity, Current				88		165
Regulatory Liabilities, Noncurrent				118		175
Regulatory Liabilities Of Consolidated Variable Interest Entity Noncurrent						0
Total Noncurrent Regulatory Liabilities				118		175
Total Regulatory Liabilities				206		340
Public Utilities, Requested Rate Increase (Decrease), Amount		$ 121
Proposed Recovery of costs for Electric Green Energy Program			$ 44
Proposed Recovery of costs for Gas Green Energy Programs			$ 13
Stranded Costs [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Liability, Current	[1]			0		64
Solar and EE Recovery Charge formerly RRC and currently Green Program Recovery Charges (GPRC) [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Liability, Current	[1],[2]			28		36
Societal Benefits Charges (SBC) [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Liability, Current	[1],[2]			4		31
Gas Margin Adjustment Clause [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Liability, Current	[1],[2]			11		13
FERC Formula Rate True-Up [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Liability, Current	[1],[2]			34		19
Regulatory Liabilities, Noncurrent	[1],[2]			1		49
Overrecovered Gas and Electric Costs - BGSS and BGS [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Liability, Current	[1],[2]			6		1
Electric and Gas Cost Of Removal [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Liabilities, Noncurrent				94		122
Other [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Liabilities, Noncurrent				3		4
Non-Utility Generation Charge [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Liability, Current	[1],[2]			5		1
New Jersey Clean Energy Program [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Current	[1]			142		142
Weather Normalization Clause [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Current	[1]			49		10
Solar and EE Recovery Charge formerly RRC and currently Green Program Recovery Charges (GPRC) [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Noncurrent	[1],[2]			91		104
Pension and Other Postretirement Benefit Costs [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Noncurrent				1,403		1,270
Deferred Income Taxes [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Noncurrent				507		467
Manufactured Gas Plant (MGP) Remediation Costs [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Noncurrent	[1]			403		431
Storm Damage Deferral [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Noncurrent				239		233
Remediation Adjustment Charge (Other SBC) [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Noncurrent	[1],[2]			180		174
Conditional Asset Retirement Obligation [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Noncurrent				157		152
Electric and Gas Cost Of Removal [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Noncurrent				189		160
Unamortized Loss On Reacquired Debt And Debt Expense [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Noncurrent				61		67
Mark-To-Market Contracts [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Noncurrent				0		63
Regulatory Liabilities, Noncurrent				20		0
Other [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Current				6		1
Regulatory Assets, Noncurrent				89		75
Underrecovered Electric Costs Basic Generation Service [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Current	[1],[2]			$ 2		$ 11

[1] Recoverable/Refundable per specific rate order.

[2] Recovered/Refunded with interest.