Leases Operating Lease Liabilities (Details) $ in Millions	Dec. 31, 2019 USD ($)
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2020	$ 44
2021	43
2022	40
2023	32
2024	26
Thereafter	209
Total Minimum Lease Payments	394
Public Service Electric and Gas Company
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2020	15
2021	13
2022	10
2023	9
2024	8
Thereafter	71
Total Minimum Lease Payments	126
PSEG Power LLC
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2020	13
2021	14
2022	14
2023	8
2024	3
Thereafter	48
Total Minimum Lease Payments	100
Other
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2020	16
2021	16
2022	16
2023	15
2024	15
Thereafter	90
Total Minimum Lease Payments	$ 168