Leases Operating Lease Liabilities (Details) $ in Millions	Sep. 30, 2019 USD ($)
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2019	$ 11
2020	44
2021	41
2022	39
2023	31
2024	26
Thereafter	205
Total Minimum Lease Payments	397
Public Service Electric and Gas Company [Member]
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2019	4
2020	15
2021	12
2022	10
2023	8
2024	8
Thereafter	67
Total Minimum Lease Payments	124
PSEG Power [Member]
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2019	3
2020	13
2021	13
2022	14
2023	8
2024	3
Thereafter	48
Total Minimum Lease Payments	102
Other
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2019	4
2020	16
2021	16
2022	15
2023	15
2024	15
Thereafter	90
Total Minimum Lease Payments	$ 171