Organization, Basis Of Presentation And Summary Of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Public Service Electric and Gas Company
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Basis Adjustment	$ 986	$ 986

Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]

No definition available.

Name:	pseg_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems
Namespace Prefix:	pseg_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration