Fair Value Measurements (Fair Value Of Debt) (Detail) - USD ($) $ in Millions		Jun. 30, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-Term Debt, Carrying Amount		$ 18,469	$ 18,070
Long-Term Debt, Fair Value		16,681	16,164
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]	13,092	12,696
Long-Term Debt, Fair Value	[1]	11,603	11,106
PSEG Power [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-Term Debt, Carrying Amount	[2]	1,250	1,250
Long-Term Debt, Fair Value	[2]	1,250	1,250
PSEG [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-Term Debt, Carrying Amount	[1]	4,127	4,124
Long-Term Debt, Fair Value	[1]	$ 3,828	$ 3,808

[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).