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Trust Investments (Schedule Of Accounts Receivable And Accounts Payable) (Detail) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Rabbi Trust [Member]    
Schedule of Trust Investments [Line Items]    
Accounts Receivable $ 2 $ 2
Accounts Payable 0 0
Nuclear Decommissioning Trust (NDT) Fund [Member] | PSEG Power LLC    
Schedule of Trust Investments [Line Items]    
Accounts Receivable 11 17
Accounts Payable $ 11 $ 5