Financing Receivables (Narrative) (Details) (Energy Holdings [Member], USD $) In Millions	Jun. 30, 2011
Energy Holdings [Member]
Lease investment with non-investment grade counterparties, gross	$ 812
Lease investment with non-investment grade counterparties, net of deferred taxes	$ 138

Name:

peg_LeaseInvestmentWithNonInvestmentGradeCounterpartiesNetOfDeferredTaxes

Namespace Prefix:

peg

Data Type:

xbrli:monetaryItemType

Balance Type:

debit

Period Type:

instant