Financial Risk Management Activities (Schedule Providing Credit Risk From Others, Net Of Collateral) (Detail) $ in Millions	12 Months Ended
Dec. 31, 2022 USD ($)
Investment Grade External Rating [Member]
Derivative [Line Items]
Credit exposure, percentage	100.00%
Public Service Electric and Gas Company
Derivative [Line Items]
Current Exposure	$ 102

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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