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Revenues - Reconciliation of Allowance for Credit Losses (Parenthetical) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Public Service Electric and Gas Company [Member]        
Revenues [Line Items]        
Recoveries $ 10 $ 7 $ 24 $ 20