Rate Filings (Details) (Subsequent Event [Member], PSE And G [Member], USD $) In Millions, unless otherwise specified	Apr. 29, 2013	Apr. 30, 2013 Electric [Member]	Apr. 30, 2013 Gas [Member]
Regulatory Assets And Liabilities [Line Items]
Approved WNC Deficiency Revenues Recovery	$ 41
Approved WNC Carryover Deficiency Revenues Recovery	24
Request for Decreased RAC Revenues		$ 12	$ 7

Approved WNC Carryover Deficiency Revenues Recovery

No definition available.

Name:	pseg_ApprovedWncCarryoverDeficiencyRevenuesRecovery
Namespace Prefix:	pseg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant