Regulatory Assets And Liabilities (Significant Orders and Pending Filings) (Details) - PSE&G [Member] $ in Millions	1 Months Ended								3 Months Ended
	Nov. 30, 2015 USD ($)	Oct. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Jul. 31, 2015 USD ($)	Jun. 30, 2015 USD ($)	Apr. 30, 2015 USD ($) $ / DTH	Mar. 31, 2015 $ / DTH	Feb. 28, 2015 USD ($)	Feb. 29, 2016 USD ($) $ / DTH	Dec. 31, 2015 USD ($)	Oct. 01, 2015	May. 31, 2014 USD ($)
Regulatory Assets And Liabilities [Line Items]
Deferred Storm and Property Reserve Deficiency, Noncurrent										$ 220
Request for RAC Recovery										$ 85
Self Implementing Bill Credit per therm | $ / DTH						0.45	243,000,000.00
Current BGSS rate per therm										0.45
Proposed BGSS rate per therm											0.40
Approved SBC and NGC revenue recovery												$ 311
True-up adjustment for Transmission Formula Rate Revenues										$ (19)
Public Utilities, Requested Rate Increase (Decrease), Amount		$ 146			$ 6			$ 1
Proposed Recovery of costs for Electric Green Energy Program	$ 57			$ 66
Proposed Recovery of costs for Gas Green Energy Programs	$ 8			$ 10
Public Utilities, Approved Additional Capital Expenditures						$ 95
Public Utilities, Approved Additional Administrative Expenses						12
Gas Distribution [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount					17
Electric Distribution [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount			$ 10
Overrecovered Gas and Electric Costs - BGSS and BGS [Member]
Regulatory Assets And Liabilities [Line Items]
BGSS Revenue Reduction					70
Weather Normalization Clause [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount					$ (40)	$ (45)
Subsequent Event [Member]
Regulatory Assets And Liabilities [Line Items]
Self Implementing Bill Credit per therm | $ / DTH									0.25
BGSS Revenue Reduction									$ 155