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Revenues - Reconciliation of Allowance for Credit Losses (Details) - Public Service Electric and Gas Company [Member] - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Revenues [Line Items] |  |  |  |
Balance | $ 234 | $ 273 | $ 215 | $ 283
Provision | 22 | 19 | 59 | 45
Write-offs, net of Recoveries | (30) | (39) | (48) | (75)
Balance | $ 226 | $ 253 | $ 226 | $ 253

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