Financing Receivables (Narrative) (Detail) $ in Millions	Sep. 30, 2015 USD ($)
Schedule of Financial Receivables [Line Items]
Lease investment with non-investment grade counterparties, gross	$ 573
Lease investment with non-investment grade counterparties, net of deferred taxes	$ (13)

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