Trust Investments (Fair Value Of Rabbi Trust) (Detail) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Schedule of Trust Investments [Line Items]
Total Rabbi Trust Investments	$ 167	$ 183
Public Service Electric and Gas Company [Member]
Schedule of Trust Investments [Line Items]
Total Rabbi Trust Investments	30	32
Rabbi Trust [Member]
Schedule of Trust Investments [Line Items]
Total Rabbi Trust Investments	167	183
Rabbi Trust [Member] | Public Service Electric and Gas Company [Member]
Schedule of Trust Investments [Line Items]
Total Rabbi Trust Investments	30	32
Rabbi Trust [Member] | PSEG Power & Other
Schedule of Trust Investments [Line Items]
Total Rabbi Trust Investments	$ 137	$ 151