Regulatory Assets And Liabilities (Significant Orders and Pending Filings) (Details) - PSE&G [Member] $ in Millions	1 Months Ended						3 Months Ended
	Nov. 30, 2016 USD ($)	Oct. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jul. 31, 2016 USD ($)	Jun. 30, 2016 USD ($)	Apr. 30, 2016 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($) $ / DTH	Oct. 01, 2016
Regulatory Assets And Liabilities [Line Items]
Deferred Storm and Property Reserve Deficiency, Noncurrent								$ 220
Self Implementing Bill Credit per therm | $ / DTH								0.08
Current BGSS rate per therm								0.40
Proposed BGSS rate per therm									0.34
True-up adjustment for Transmission Formula Rate Revenues								$ (34)
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
Public Utilities, Approved Additional Capital Expenditures	$ 80
Public Utilities, Requested Return on Equity, Percentage	9.75%
Gas Distribution [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount					23
Gas System Modernization Program [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount		$ 10
Electric Distribution [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount			$ 12		16
Overrecovered Gas and Electric Costs - BGSS and BGS [Member]
Regulatory Assets And Liabilities [Line Items]
BGSS Revenue Reduction					$ 87
Weather Normalization Clause [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount				$ 54
Remediation Adjustment Charge (Other SBC) [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount	$ 41					$ 54
Subsequent Event [Member]
Regulatory Assets And Liabilities [Line Items]
BGSS Revenue Reduction							$ 47