Commitments And Contingent Liabilities (Future Minimum Lease Payments) (Details) $ in Millions	Dec. 31, 2017 USD ($)
Other Commitments [Line Items]
Due Next Twelve Months	$ 36
Due in Two Years	31
Due in Three Years	27
Due in Four Years	27
Due in Five Years	26
Thereafter	224
Capital Leases, Future Minimum Payments Due	371
PSE&G [Member]
Other Commitments [Line Items]
Due Next Twelve Months	16
Due in Two Years	9
Due in Three Years	8
Due in Four Years	8
Due in Five Years	7
Thereafter	65
Capital Leases, Future Minimum Payments Due	113
Power [Member]
Other Commitments [Line Items]
Due Next Twelve Months	5
Due in Two Years	6
Due in Three Years	3
Due in Four Years	3
Due in Five Years	3
Thereafter	38
Capital Leases, Future Minimum Payments Due	58
Services [Member]
Other Commitments [Line Items]
Due Next Twelve Months	14
Due in Two Years	15
Due in Three Years	15
Due in Four Years	15
Due in Five Years	15
Thereafter	120
Capital Leases, Future Minimum Payments Due	194
Other [Member]
Other Commitments [Line Items]
Due Next Twelve Months	1
Due in Two Years	1
Due in Three Years	1
Due in Four Years	1
Due in Five Years	1
Thereafter	1
Capital Leases, Future Minimum Payments Due	$ 6