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Commitments And Contingent Liabilities (Basic Generation Service (BGS) And Basic Gas Supply Service (BGSS)) (Detail) cf in Billions | 6 Months Ended
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Jun. 30, 2019 USD ($) cf $ / mwd $ / MWh MW
Long-term Purchase Commitment [Line Items] |  |
Number of cubic feet in gas hedging permitted to be recovered by BPU | cf | 115 |
Percentage of residential gas supply permitted to be recovered in gas hedging by BPU | 80.00% |
Number of cubic feet to be hedged | cf | 70 |
Percentage of annual residential gas supply requirements to be hedged | 50.00% |
Public Service Electric and Gas Company [Member] |  |
Long-term Purchase Commitment [Line Items] |  |
ZEC Charge per kwh | $ | $ 0.004 |
Public Service Electric and Gas Company [Member] | Auction Year 2016 [Member] |  |
Long-term Purchase Commitment [Line Items] |  |
36-Month Terms Ending | May 31, 2019 |
Load (MW) | MW | 2,800 |
Dollars Per Megawatt Hour | $ / MWh | 96.38 |
Public Service Electric and Gas Company [Member] | Auction Year 2017 [Member] |  |
Long-term Purchase Commitment [Line Items] |  |
36-Month Terms Ending | May 31, 2020 |
Load (MW) | MW | 2,800 |
Dollars Per Megawatt Hour | $ / MWh | 90.78 |
Public Service Electric and Gas Company [Member] | Auction Year 2018 [Member] |  |
Long-term Purchase Commitment [Line Items] |  |
Dollars Per Megawatt-Day | $ / mwd | 287.76 |
36-Month Terms Ending | May 31, 2021 |
Load (MW) | MW | 2,900 |
Dollars Per Megawatt Hour | $ / MWh | 91.77 |
Public Service Electric and Gas Company [Member] | Auction Year 2019 [Member] |  |
Long-term Purchase Commitment [Line Items] |  |
Dollars Per Megawatt-Day | $ / mwd | 281.78 |
36-Month Terms Ending | May 31, 2022 | [1]
Load (MW) | MW | 2,800 |
Dollars Per Megawatt Hour | $ / MWh | 98.04 |
[1] | Prices set in the 2019 BGS auction became effective on June 1, 2019 when the 2016 BGS auction agreements expired.

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