Regulatory Assets And Liabilities (Schedule Of Regulatory Assets and Liabilities) (Details) $ in Millions	1 Months Ended
	Jan. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Current		$ 389	$ 211
Regulatory Assets, Noncurrent		3,399	3,222
Regulatory Liability, Current		311	47
Regulatory Liabilities, Noncurrent		$ 3,221	2,948
PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Current BGSS rate per therm		0.37
Proposed BGSS rate per therm		0.35
True-up adjustment for Transmission Formula Rate Revenues		$ 27
Regulatory Assets, Current		389	211
Regulatory Assets, Noncurrent		3,399	3,222
Total Regulatory Assets		3,788	3,433
Regulatory Liability, Current		311	47
Regulatory Liabilities, Noncurrent		3,221	2,948
Total Regulatory Liabilities		3,532	2,995
Excess Deferred Income Taxes [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Liability, Current		299	0
Regulatory Liabilities, Noncurrent		3,170	2,868
Reduction in Deferred Tax Liabilities			2,100
Gas Margin Adjustment Clause [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Liability, Current		8	12
Overrecovered Gas and Electric Costs - BGSS and BGS [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Liability, Current		0	30
Electric and Gas Cost Of Removal [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Liabilities, Noncurrent		51	80
Other [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Liability, Current		4	5
New Jersey Clean Energy Program [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Current		143	128
Weather Normalization Clause [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Current		2	40
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, Current		34	8
Regulatory Assets, Noncurrent		95	98
Pension and Other Postretirement Benefit Costs [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Noncurrent		1,090	1,488
Deferred Income Taxes [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Noncurrent		896	282
Manufactured Gas Plant (MGP) Remediation Costs [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Noncurrent		321	358
Storm Damage and Other [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Current		56	0
Regulatory Assets, Noncurrent		214	241
Remediation Adjustment Charge (Other SBC) [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Noncurrent		175	172
Conditional Asset Retirement Obligation [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Noncurrent		166	162
Electric and Gas Cost Of Removal [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Noncurrent		223	199
Unamortized Loss On Reacquired Debt And Debt Expense [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Noncurrent		49	55
Other [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Current		39	12
Regulatory Assets, Noncurrent		139	137
Underrecovered Electric Costs Basic Generation Service [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Current		115	23
Overrecovered Gas and Electric Costs - BGSS and BGS [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets, Noncurrent		$ 31	$ 30
Subsequent Event [Member] | Transmission Formula Rate [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount	$ (54)