Trust Investments (Fair Value Of Rabbi Trust) (Detail) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Schedule of Trust Investments [Line Items]
Total Rabbi Trust Investments	$ 173	$ 179
Public Service Electric and Gas Company [Member]
Schedule of Trust Investments [Line Items]
Total Rabbi Trust Investments	31	32
Rabbi Trust [Member]
Schedule of Trust Investments [Line Items]
Total Rabbi Trust Investments	173	179
Rabbi Trust [Member] | Public Service Electric and Gas Company [Member]
Schedule of Trust Investments [Line Items]
Total Rabbi Trust Investments	31	32
Rabbi Trust [Member] | PSEG Power & Other
Schedule of Trust Investments [Line Items]
Total Rabbi Trust Investments	$ 142	$ 147