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Commitments And Contingent Liabilities (Basic Generation Service (BGS) And Basic Gas Supply Service (BGSS)) (Detail) cf in Billions | 3 Months Ended
--- | ---
Mar. 31, 2018 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% |
PSE And G [Member] | Auction Year 2015 [Member] |  |
Long-term Purchase Commitment [Line Items] |  |
36-Month Terms Ending | May 31, 2018 |
Load (MW) | MW | 2,900 |
Dollars Per Megawatt Hour | $ / mwh | 99.54 |
PSE And G [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 |
PSE And G [Member] | Auction Year 2017 [Member] |  |
Long-term Purchase Commitment [Line Items] |  |
Dollars Per Megawatt-Day | $ / mwd | 276.83 |
36-Month Terms Ending | May 31, 2020 |
Load (MW) | MW | 2,800 |
Dollars Per Megawatt Hour | $ / mwh | 90.78 |
PSE And G [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 | [1]
Load (MW) | MW | 2,900 |
Dollars Per Megawatt Hour | $ / mwh | 91.77 |
[1] | Prices set in the 2018 BGS auction year will become effective on June 1, 2018 when the 2015 BGS auction agreements expire.

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