Regulatory Assets And Liabilities (Significant Orders and Pending Filings) (Details) $ in Millions	1 Months Ended								3 Months Ended		12 Months Ended
	Jan. 31, 2018 USD ($)	Oct. 31, 2017 USD ($)	Aug. 31, 2017 USD ($)	Jun. 30, 2017 USD ($)	Apr. 30, 2017 USD ($)	Nov. 30, 2016 USD ($)	Jul. 31, 2016 USD ($)	Apr. 30, 2016 USD ($)	Dec. 31, 2018	Mar. 31, 2018 USD ($) $ / DTH	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Oct. 01, 2017
Regulatory Assets And Liabilities [Line Items]
Maximum U.S. Corporate Income Tax Rate												35.00%
PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Deferred Storm and Property Reserve Deficiency, Noncurrent												$ 220
Current BGSS rate per therm												0.34
Proposed BGSS rate per therm													0.37
True-up adjustment for Transmission Formula Rate Revenues				$ (12)								$ (16)
Maximum U.S. Corporate Income Tax Rate												35.00%
Transmission Formula Rate [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount		$ 212
Gas Distribution [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount												$ 2
Electric Distribution [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount												16
Weather Normalization Clause [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount							$ 55
Remediation Adjustment Charge (Other SBC) [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount						$ 63		$ 41
Electric Green Program Recovery [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount												47
Gas Green Program Recovery [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount												13
Subsequent Event [Member]
Regulatory Assets And Liabilities [Line Items]
Maximum U.S. Corporate Income Tax Rate											21.00%
Subsequent Event [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Self Implementing Bill Credit per therm | $ / DTH										0.15
BGSS Revenue Reduction										$ 100
Maximum U.S. Corporate Income Tax Rate											21.00%
Subsequent Event [Member] | Distribution Base rates [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Percentage									1.00%
Subsequent Event [Member] | Transmission Formula Rate [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount	$ 148
Public Utilities, Requested Rate Increase (Decrease), Amended, Amount	$ 64
Subsequent Event [Member] | Gas System Modernization Program [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount											$ 25
Subsequent Event [Member] | Electric Distribution [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount											$ 8
2015 to 2016 [Member] | Weather Normalization Clause [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount					$ 54
Public Utilities, Requested Rate Increase (Decrease), Amount				24
2016 to 2017 [Member] | Weather Normalization Clause [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount				$ 31
Solar or EE Recovery Charge (RRC) [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Additional Capital Expenditures			$ 69
Public Utilities, Approved Additional Costs			$ 16
Solar or EE Recovery Charge (RRC) [Member] | Gas Distribution [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount												13
Solar or EE Recovery Charge (RRC) [Member] | Electric Distribution [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount												37
Stranded Costs [Member] | PSE&G [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount												$ (5)