Leases Reconciliation of Undiscounted Cash Flows (Details) $ in Millions	Jun. 30, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Total Minimum Lease Payments	$ 394
Reconciling Amount due to Discount Rate	(89)
Total Discounted Operating Lease Liabilities	305
Public Service Electric and Gas Company [Member]
Lessee, Lease, Description [Line Items]
Total Minimum Lease Payments	113
Reconciling Amount due to Discount Rate	(24)
Total Discounted Operating Lease Liabilities	89
PSEG Power [Member]
Lessee, Lease, Description [Line Items]
Total Minimum Lease Payments	106
Reconciling Amount due to Discount Rate	(30)
Total Discounted Operating Lease Liabilities	76
Other
Lessee, Lease, Description [Line Items]
Total Minimum Lease Payments	175
Reconciling Amount due to Discount Rate	(35)
Total Discounted Operating Lease Liabilities	$ 140