Fair Value Measurements (Fair Value Of Debt) (Detail) - USD ($) $ in Millions		Sep. 30, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-Term Debt, Carrying Amount		$ 17,675	$ 15,919
Long-Term Debt, Fair Value		15,495	17,546
Public Service Electric and Gas Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-Term Debt, Carrying Amount	[1]	12,296	11,795
Long-Term Debt, Fair Value	[1]	10,512	13,374
PSEG Power [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-Term Debt, Carrying Amount		1,250	0	[2]
Long-Term Debt, Fair Value		1,250	0	[2]
PSEG [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-Term Debt, Carrying Amount	[1]	4,129	4,124
Long-Term Debt, Fair Value	[1]	$ 3,733	$ 4,172

[1] Given that these bonds do not trade actively, the fair value amounts of taxable debt securities (primarily Level 2 measurements) are generally determined by a valuation model using market-based measurements that are processed through a rules-based pricing methodology. The fair value amounts above do not represent the price at which the outstanding debt may be called for redemption by each issuer under their respective debt agreements.

[2] Private term loan with book value approximating fair value (Level 2 measurement).