Leases Reconciliation of Undiscounted Cash Flows (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Lessee, Lease, Description [Line Items]
Total Minimum Lease Payments	$ 269	$ 366
Reconciling Amount due to Discount Rate	(45)	(80)
Total Discounted Operating Lease Liabilities	224	286
Public Service Electric and Gas Company
Lessee, Lease, Description [Line Items]
Total Minimum Lease Payments	117	127
Reconciling Amount due to Discount Rate	(22)	(26)
Total Discounted Operating Lease Liabilities	95	101
Other Segments
Lessee, Lease, Description [Line Items]
Total Minimum Lease Payments	152	239
Reconciling Amount due to Discount Rate	(23)	(54)
Total Discounted Operating Lease Liabilities	$ 129	$ 185