Rate Filings (Details) - PSE And G [Member] $ in Millions	1 Months Ended
	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	Oct. 01, 2015
Regulatory Assets And Liabilities [Line Items]
Requested rate increase (decrease)				$ (6)
Self implementing bill credit per therm | $ / DTH					0.45	0.28
BGSS revenue reduction					$ 31
Current BGSS rate per therm		0.45
Proposed BGSS rate per therm							0.40
Approved capital expenditures for Green Program					95
Approved administrative expenses for Green Program					12
Proposed recovery of costs for Electric Green Energy Program			$ 66
Proposed recovery of costs for Gas Green Energy Programs			$ 10
True-up adjustment for transmission formula rate revenues		$ 19
Request for RAC Recovery		85
Electric Distribution [Member]
Regulatory Assets And Liabilities [Line Items]
Requested rate increase (decrease)				(17)
Electric Distribution [Member]
Regulatory Assets And Liabilities [Line Items]
Requested rate increase (decrease)		$ (14)
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 (decrease)				$ 40	$ 45
Subsequent Event [Member]
Regulatory Assets And Liabilities [Line Items]
Requested rate increase (decrease)	$ (146)