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Revenues - Reconciliation of Allowance for Credit Losses (Parenthetical) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Public Service Electric and Gas Company [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Recoveries | $ 13 | $ 10 | $ 32 | $ 24

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