Rate Filings (Details) - PSE And G [Member] $ in Millions	1 Months Ended
	Oct. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jul. 31, 2016 USD ($)	Jun. 30, 2016 USD ($)	Oct. 01, 2016
Regulatory Assets And Liabilities [Line Items]
Request for RAC Recovery		$ 54
Public Utilities, Requested Rate Increase (Decrease), Amount		$ 15		$ 16
Current BGSS rate per therm		0.40
Proposed Recovery of costs for Electric Green Energy Program				44
True-up adjustment for Transmission Formula Rate Revenues		$ 34
Proposed Recovery of costs for Gas Green Energy Programs				13
Gas Distribution [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount				23
Overrecovered Gas Costs Basic Gas Supply Service [Member]
Regulatory Assets And Liabilities [Line Items]
BGSS Revenue Reduction				$ 87
Gas Weather Normalization Deferral [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount			$ 54
Subsequent Event [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount	$ 121
Proposed BGSS rate per therm					0.34
Subsequent Event [Member] | Gas System Modernization Program [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount	$ 10