Commitments And Contingent Liabilities (Basic Generation Service (BGS) And Basic Gas Supply Service (BGSS)) (Detail) cf in Billions	9 Months Ended
	Sep. 30, 2023 USD ($) 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%
ZEC Charge per kwh | $	$ 0.004
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 2020 [Member]
Long-term Purchase Commitment [Line Items]
Load (MW) | MW	2,800
Dollars Per Megawatt Hour | $ / MWh	102.16
Public Service Electric and Gas Company [Member] | Auction Year 2021
Long-term Purchase Commitment [Line Items]
Load (MW) | MW	2,900
Dollars Per Megawatt Hour | $ / MWh	64.80
Public Service Electric and Gas Company [Member] | Auction Year 2022
Long-term Purchase Commitment [Line Items]
Dollars Per Megawatt-Day | $ / mwd	276.26
Load (MW) | MW	2,800
Dollars Per Megawatt Hour | $ / MWh	76.30
Public Service Electric and Gas Company [Member] | Auction Year 2023
Long-term Purchase Commitment [Line Items]
Dollars Per Megawatt-Day | $ / mwd	330.72
Load (MW) | MW	2,800
Dollars Per Megawatt Hour | $ / MWh	93.11	[1]

[1] Prices set in the 2023 BGS auction became effective on June 1, 2023 when the 2020 BGS auction agreements expired.