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Commitments And Contingent Liabilities (Basic Generation Service (BGS) And Basic Gas Supply Service (BGSS)) (Detail) cf in Billions | 9 Months Ended
--- | ---
Sep. 30, 2015 cf $ / mwh $ / mwd 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 2012 [Member] |  |
Long-term Purchase Commitment [Line Items] |  |
36-Month Terms Ending | May 31, 2015 |
Load (MW) | MW | 2,900 |
Dollars Per Megawatt Hour | 83.88 |
PSE And G [Member] | Auction Year 2013 [Member] |  |
Long-term Purchase Commitment [Line Items] |  |
36-Month Terms Ending | May 31, 2016 |
Load (MW) | MW | 2,800 |
Dollars Per Megawatt Hour | 92.18 |
PSE And G [Member] | Auction Year 2014 [Member] |  |
Long-term Purchase Commitment [Line Items] |  |
Dollars Per Megawatt-Day | $ / mwd | 282.04 |
36-Month Terms Ending | May 31, 2017 |
Load (MW) | MW | 2,800 |
Dollars Per Megawatt Hour | 97.39 |
PSE And G [Member] | Auction Year 2015 [Member] |  |
Long-term Purchase Commitment [Line Items] |  |
Dollars Per Megawatt-Day | $ / mwd | 272.78 |
36-Month Terms Ending | May 31, 2018 | [1]
Load (MW) | MW | 2,900 |
Dollars Per Megawatt Hour | 99.54 |
[1] | Prices set for the 2015 BGS auction year became effective on June 1, 2015 when the 2012 BGS auction agreements expired.

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