Rate Filings (Details) (PSE And G [Member], USD $) In Millions, unless otherwise specified	Apr. 29, 2013	Jul. 01, 2013 Subsequent Event [Member]	Jun. 30, 2013 Electric [Member]	May 01, 2013 Electric [Member]	Jun. 30, 2013 Gas [Member]	May 01, 2013 Gas [Member]
Regulatory Assets And Liabilities [Line Items]
Approved WNC Deficiency Revenues Recovery	$ 41
Approved WNC Carryover Deficiency Revenues Recovery	24
Supplemental Request for WNC Carryover Deficiency Revenues Recovery		26
Approved Solar and Energy Efficiency Recovery Charges				62		8
Request for Increased RRC Revenues			$ 1		$ 1