Leases Operating Lease Commitments (Details) $ in Millions	Dec. 31, 2018 USD ($)
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2019	$ 41
2020	40
2021	39
2022	38
2023	31
Thereafter	222
Total Minimum Lease Payments	411
Public Service Electric and Gas Company [Member]
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2019	15
2020	11
2021	10
2022	8
2023	8
Thereafter	66
Total Minimum Lease Payments	118
PSEG Power [Member]
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2019	11
2020	13
2021	13
2022	14
2023	8
Thereafter	51
Total Minimum Lease Payments	110
Other
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2019	15
2020	16
2021	16
2022	16
2023	15
Thereafter	105
Total Minimum Lease Payments	$ 183

Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the remainder of the fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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