Financing Receivables (Narrative) (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended
Jun. 30, 2013
Partial Rental Payment	$ 4
Energy Holdings [Member]
Lease investment with non-investment grade counterparties, gross	561
Lease investment with non-investment grade counterparties, net of deferred taxes	$ 40

Lease Investment With Non Investment Grade Counterparties Net Of Deferred Taxes

No definition available.

Name:	pseg_LeaseInvestmentWithNonInvestmentGradeCounterpartiesNetOfDeferredTaxes
Namespace Prefix:	pseg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant