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Regulatory Assets And Liabilities - Additional Information (Details) | 1 Months Ended | 12 Months Ended |
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Feb. 28, 2025 USD ($) | Jan. 31, 2025 USD ($) | Dec. 31, 2024 USD ($) | Oct. 31, 2024 USD ($) | Sep. 30, 2024 USD ($) | Jun. 30, 2024 USD ($) | May 31, 2024 USD ($) $ / MWh | Apr. 30, 2024 USD ($) | Mar. 31, 2024 USD ($) | Feb. 29, 2024 USD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Sep. 30, 2018 USD ($)
Regulatory Asset [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets |  |  | $ 6,125,000,000 |  |  |  |  |  |  |  | $ 6,125,000,000 | $ 5,157,000,000 |  |
Electric Transmission [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Asset [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public utilities, approved rate increase (decrease), amount |  |  |  | $ 64,000,000 |  |  |  |  |  |  |  |  |  |
Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Asset [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets |  |  | 6,125,000,000 |  |  |  |  |  |  |  | 6,125,000,000 | 5,157,000,000 |  |
Regulatory Assets |  |  | 6,641,000,000 |  |  |  |  |  |  |  | 6,641,000,000 | 5,430,000,000 |  |
Flowback of tax benefits |  |  |  |  |  |  |  |  |  |  | 81,000,000 | 80,000,000 | $ 35,000,000 |
Public Service Electric and Gas Company | COVID-19 deferrals [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Asset [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets |  |  |  |  |  | $ 68,000,000 |  |  |  |  |  |  |  |
Regulatory Assets |  |  |  |  |  | 131,000,000 |  |  |  |  |  |  |  |
Public Service Electric and Gas Company | Electric Transmission [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Asset [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public utilities, approved rate increase (decrease), amount |  |  |  |  |  | 12,000,000 |  |  |  |  |  |  |  |
Public Service Electric and Gas Company | Distribution Base Rate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Asset [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets |  |  |  |  | $ 509,000,000 |  |  |  |  |  |  |  |  |
Public utilities, approved rate base |  |  |  | $ 17,800,000,000 |  |  |  |  |  |  |  |  |  |
Public utilities, approved return on equity, percentage |  |  |  | 9.60% |  |  |  |  |  |  |  |  |  |
Public utilities, approved equity capital structure, percentage |  |  |  | 55.00% |  |  |  |  |  |  |  |  |  |
Public utilities, approved rate increase (decrease), amount |  |  |  | $ 505,000,000 |  |  |  |  |  |  |  |  |  |
Public Service Electric and Gas Company | distributed related repair deductions [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Asset [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Excess Deferred income taxes to be refunded |  |  | 840,000,000 |  |  |  |  |  |  |  | 840,000,000 |  |  |
Public Service Electric and Gas Company | distribution related repair deduction [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Asset [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Excess Deferred income taxes to be refunded |  |  | 310,000,000 |  |  |  |  |  |  |  | 310,000,000 |  |  |
Public Service Electric and Gas Company | Distribution-related mixed service cost deductions [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Asset [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Excess Deferred income taxes to be refunded |  |  | 509,000,000 |  |  |  |  |  |  |  | 509,000,000 |  |  |
Public Service Electric and Gas Company | Transmission related over remaining useful life [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Asset [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Excess Deferred income taxes to be refunded |  |  | 928,000,000 |  |  |  |  |  |  |  | 928,000,000 |  |  |
Public Service Electric and Gas Company | Base Revenues [Member] | Distribution Base Rate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Asset [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public utilities, approved rate increase (decrease), amount |  |  |  | 711,000,000 |  |  |  |  |  |  |  |  |  |
Public Service Electric and Gas Company | Return of tax benefits [Member] | Distribution Base Rate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Asset [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public utilities, approved rate increase (decrease), amount |  |  |  | (206,000,000) |  |  |  |  |  |  |  |  |  |
Z E C Liability [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Asset [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Price Per Mega watt Hour | $ / MWh |  |  |  |  |  |  | 9.95 |  |  |  |  |  |  |
Z E C Purchases |  |  |  |  |  |  | $ 166,000,000 |  |  |  |  |  |  |
Tax Adjustment Credit [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Asset [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets |  |  |  |  | $ 509,000,000 |  |  |  |  |  |  |  |  | $ 581,000,000
Basic Gas Supply Service [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Asset [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Approved BGSS rate per therm |  |  |  |  | 0.33 |  |  | 0.40 |  |  |  |  |  |
Societal Benefits Charges Sbc [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Asset [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets |  |  | 211,000,000 |  |  |  |  |  |  |  | 211,000,000 | 155,000,000 |  |
Societal Benefits Charges Sbc [Member] | Public Service Electric and Gas Company | Electric Bad Debt Deferral [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Asset [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets |  |  | 78,000,000 |  |  |  |  |  |  |  | 78,000,000 |  |  |
Public utilities, approved rate increase (decrease), amount |  |  |  |  |  | 78,000,000 |  |  |  |  | 78,000,000 |  |  |
Conservation Incentive Program | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Asset [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public utilities, approved rate increase (decrease), amount |  |  |  |  | $ 107,000,000 |  |  |  |  |  |  |  |  |
Conservation Incentive Program | Subsequent Event [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Asset [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public utilities, approved rate increase (decrease), amount | $ 96,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Conservation Incentive Program Gas First Twelve Months | Subsequent Event [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Asset [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public utilities, approved rate increase (decrease), amount | 65,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
COVID-19 Deferral [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Asset [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets |  |  | 131,000,000 |  |  |  |  |  |  |  | 131,000,000 | 131,000,000 |  |
COVID-19 Deferral - Bad Debt portion [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Asset [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets |  |  | 68,000,000 |  |  | 68,000,000 |  |  |  |  | 68,000,000 |  |  |
Gas System Modernization Program II [Member] | Subsequent Event [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Asset [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public utilities, approved rate increase (decrease), amount | 53,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Energy Strong II Electric [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Asset [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public utilities, approved rate increase (decrease), amount |  |  |  |  |  |  |  | $ 12,000,000 |  |  |  |  |  |
Electric Green Program Recovery [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Asset [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  |  |  |  |  | 68,000,000 |  |  |  |  |  |  |  |
Public utilities, approved rate increase (decrease), amount |  |  |  |  |  | 49,000,000 |  |  |  |  |  |  |  |
Gas Green Program Recovery [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Asset [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  |  |  |  |  | 24,000,000 |  |  |  |  |  |  |  |
Public Utilities, Approved Investment, Amount |  |  |  | 2,900,000,000 |  |  |  |  |  |  |  |  |  |
Public utilities, approved rate increase (decrease), amount |  |  |  | $ 3,000,000 |  | $ 15,000,000 |  |  |  |  |  |  |  |
Clean Energy Future-EE [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Asset [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public utilities, approved rate increase (decrease), amount |  |  |  |  |  |  | 300,000,000 |  |  |  |  |  |  |
Pension Ratemaking deferral [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Asset [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets |  |  | 103,000,000 |  |  |  |  |  |  |  | 103,000,000 | $ 55,000,000 |  |
Infrastructure Advancement Program [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Asset [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public utilities, approved rate increase (decrease), amount |  |  |  |  |  |  | $ 5,000,000 |  |  |  |  |  |  |
Electric Infrastructure Advancement Program [Member] | Subsequent Event [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Asset [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount | 6,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Gas Infrastructure Advancement Program [Member] | Subsequent Event [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Asset [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount | $ 3,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Tax Adjustment Credits Electric Distribution [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Asset [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public utilities, approved rate increase (decrease), amount |  |  |  |  |  |  |  |  |  | $ 61,000,000 | (99,000,000) |  |  |
Tax Adjustment Credits Gas Distribution [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Asset [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public utilities, approved rate increase (decrease), amount |  |  |  |  |  |  |  |  |  | $ 40,000,000 | $ (107,000,000) |  |  |
Remediation Adjustment Clause [Member] | Subsequent Event [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Asset [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public utilities, approved rate increase (decrease), amount |  | $ 56,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Electric Societal Benefits Clause [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Asset [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public utilities, approved rate increase (decrease), amount |  |  | (3,000,000) |  |  |  |  |  | $ 27,000,000 |  |  |  |  |
Gas Societal Benefit Clause [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Asset [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public utilities, approved rate increase (decrease), amount |  |  | $ 38,000,000 |  |  |  |  |  | $ 32,000,000 |  |  |  |  |

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