Financial Risk Management Activities (Schedule Providing Credit Risk From Others, Net Of Collateral) (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2022 USD ($) Counterparty
PSEG Power [Member]
Derivative [Line Items]
Current Exposure	$ 100
Securities held as Collateral	15
Net exposure	$ 85
Number of Counterparties greater than 10% | Counterparty	2
Number Of Active Counterparties On Credit Risk Derivatives | Counterparty	76
PSEG Power [Member] | Investment Grade - External Rating [Member]
Derivative [Line Items]
Percentage Of Credit Exposure	100.00%
PSEG Power [Member] | Investment Grade [Member]
Derivative [Line Items]
Current Exposure	$ 99
Securities held as Collateral	14
Net exposure	$ 85
Number of Counterparties greater than 10% | Counterparty	2
Amount Of Net Credit Exposure Greater Than Ten Percent	$ 44	[1]
PSEG Power [Member] | External Credit Rating, Non Investment Grade [Member]
Derivative [Line Items]
Current Exposure	1
Securities held as Collateral	1
Amount Of Net Credit Exposure Greater Than Ten Percent	0
PSEG Power [Member] | Non-Investment Grade [Member]
Derivative [Line Items]
Net exposure	$ 0
Number of Counterparties greater than 10% | Counterparty	0
Public Service Electric and Gas Company [Member]
Derivative [Line Items]
Current Exposure	$ 122
Letter of Credit [Member] | PSEG Power [Member]
Derivative [Line Items]
Securities held as Collateral	15
Public Service Electric and Gas Company [Member] | PSEG Power [Member] | Investment Grade [Member]
Derivative [Line Items]
Amount Of Net Credit Exposure Greater Than Ten Percent	34
Non affiliated counterparties | PSEG Power [Member] | Investment Grade [Member]
Derivative [Line Items]
Amount Of Net Credit Exposure Greater Than Ten Percent	$ 10

[1] Represents net exposure of $34 million with PSE&G and $10 million with a non-affiliated counterparty.