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Long-Term Investments (Schedule Of Long Term Investments) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Long-Term Investments [Line Items]      
Total Long-Term Investments $ 624 $ 541  
Dividends in equity method investments 8 17 $ 15
Provision for Loan and Lease Losses   9 $ 26
Public Service Electric and Gas Company      
Long-Term Investments [Line Items]      
Total Long-Term Investments 143 181  
Life Insurance And Supplemental Benefits [Member] | Public Service Electric and Gas Company      
Long-Term Investments [Line Items]      
Total Long-Term Investments 81 89  
Solar Loan Investment [Member] | Public Service Electric and Gas Company      
Long-Term Investments [Line Items]      
Total Long-Term Investments 62 92  
Partnerships And Corporate Joint Ventures [Member]      
Long-Term Investments [Line Items]      
Total Long-Term Investments [1] 306 173  
Leases [Member]      
Long-Term Investments [Line Items]      
Total Long-Term Investments $ 175 $ 187  
[1] During the three years ended December 31, 2022, 2021 and 2020, dividends from these investments were $8 million, $17 million and $15 million, respectively.