Financing Receivables (Narrative) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2013
Rent Payables	$ 48
Partial Rental Payment	5
Energy Holdings [Member]
Lease investment with non-investment grade counterparties, gross	560
Lease investment with non-investment grade counterparties, net of deferred taxes	$ 30

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