Rate Filings (Details) - PSE And G [Member] $ in Millions	1 Months Ended
	Jul. 31, 2015 USD ($)	Jun. 30, 2015 USD ($)	Apr. 30, 2015 USD ($) $ / DTH	Oct. 01, 2015	Sep. 30, 2015
Regulatory Assets And Liabilities [Line Items]
Requested rate increase		$ 6
Self implementing bill credit per therm | $ / DTH			0.28
BGSS revenue reduction			$ 31
Approved capital expenditures for Green Program			95
Approved administrative expenses for Green Program			12
True-up adjustment for transmission formula rate revenues		19
Electric Distribution [Member]
Regulatory Assets And Liabilities [Line Items]
Requested rate increase		17
Overrecovered Gas Costs Basic Gas Supply Service [Member]
Regulatory Assets And Liabilities [Line Items]
BGSS revenue reduction		70
Gas Weather Normalization Deferral [Member]
Regulatory Assets And Liabilities [Line Items]
Requested rate increase		$ 40	$ 45
Scenario, Forecast [Member]
Regulatory Assets And Liabilities [Line Items]
Current BGSS rate per therm					0.45
Proposed BGSS rate per therm				0.40
Subsequent Event [Member]
Regulatory Assets And Liabilities [Line Items]
Proposed recovery of costs for Electric Green Energy Program	$ 64
Proposed recovery of costs for Gas Green Energy Programs	$ 10