Commitments And Contingent Liabilities (Basic Generation Service (BGS) And Basic Gas Supply Service (BGSS)) (Detail) cf in Billions	6 Months Ended
	Jun. 30, 2016 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 2013 [Member]
Long-term Purchase Commitment [Line Items]
36-Month Terms Ending	May 31, 2016	[1]
Load (MW) | MW	2,800
Dollars Per Megawatt Hour | $ / mwh	92.18
PSE And G [Member] | Auction Year 2014 [Member]
Long-term Purchase Commitment [Line Items]
36-Month Terms Ending	May 31, 2017
Load (MW) | MW	2,800
Dollars Per Megawatt Hour | $ / mwh	97.39
PSE And G [Member] | Auction Year 2014 [Member]
Long-term Purchase Commitment [Line Items]
Dollars Per Megawatt-Day | $ / mwd	272.78
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]
Dollars Per Megawatt-Day | $ / mwd	335.33
36-Month Terms Ending	May 31, 2019	[1]
Load (MW) | MW	2,800
Dollars Per Megawatt Hour | $ / mwh	96.38

[1] Prices set in the 2016 BGS auction year became effective on June 1, 2016 when the 2013 BGS auction agreements expired.