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Regulatory Assets And Liabilities (Significant Orders and Pending Filings) (Details) $ in Millions | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jan. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Nov. 30, 2020 USD ($) | Oct. 31, 2020 USD ($) | Sep. 30, 2020 USD ($) | Aug. 31, 2020 USD ($) | Jul. 31, 2020 USD ($) | Jun. 30, 2020 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Sep. 30, 2018 USD ($)
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Maximum U.S. Corporate Income Tax Rate |  |  |  |  |  |  |  |  | 21.00% |  |
Regulatory Assets |  | $ 3,872.0 |  |  |  |  |  |  | $ 3,872.0 | $ 3,677.0 |
Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Proposed BGSS rate per therm |  | 0.32 |  |  |  |  |  |  | 0.32 |  |
Regulatory Assets |  | $ 4,241.0 |  |  |  |  |  |  | $ 4,241.0 | 4,028.0 |
Regulatory Liabilities |  | 3,001.0 |  |  |  |  |  |  | 3,001.0 | 3,236.0 |
Flowback of tax benefits |  |  |  |  |  |  |  |  | 31.0 | 58.0 |
Regulatory Assets |  | 3,872.0 |  |  |  |  |  |  | 3,872.0 | 3,677.0 |
Public Service Electric and Gas Company | Weather Normalization Clause [Member] |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  | $ (2.0) | $ 10.0 |  |  |  |  |  |  |
Public Service Electric and Gas Company | ZEC Liability |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  | (6.2) |  |  |  |  |  |  |  |  |
ZEC purchases |  |  |  |  |  |  |  |  | 154.0 |  |
Public Service Electric and Gas Company | ZEC overcollection for May 2020 year end [Member] |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  | (6.0) |  |  |  |  |  |  |  |  |
Public Service Electric and Gas Company | ZEC overcollection for May 2019 year end [Member] |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  | (0.2) |  |  |  |  |  |  |  |  |
Tax Adjustment Credits Electric Distribution [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  |  |  |  |  | $ (25.0) |  |  |  |
Flowback of unprotected tax benefits total |  |  |  |  |  |  |  |  | 50.0 |  |
Tax Adjustment Credits Gas Distribution [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  |  |  |  |  | (29.0) |  |  |  |
Flowback of unprotected tax benefits total |  |  |  |  |  |  |  |  | 46.0 |  |
Remediation Adjustment Clause [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  |  |  | $ 53.0 |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  | (35.0) |  |  |  |  |  |  |  |  |
Transmission related over remaining useful life [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Excess Deferred income taxes to be refunded |  |  |  |  |  |  |  |  |  | 940.0 |
unprotected distribution related over remaining useful life [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Excess Deferred income taxes to be refunded |  |  |  |  |  |  |  |  |  | 520.0 |
protected distribution related over remaining useful life [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Excess Deferred income taxes to be refunded |  |  |  |  |  |  |  |  |  | 933.0 |
distributed related repair deductions [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Excess Deferred income taxes to be refunded |  |  |  |  |  |  |  |  |  | 500.0 |
Transition Incentive Program [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  |  |  |  | $ 23.0 |  |  |  |  |
Unprotected Transmission related [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Flowback of unprotected tax benefits total |  |  |  |  |  |  |  |  | 38.0 |  |
Clean Energy Future - Energy Efficiency | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Public Utilities, approved investment |  |  |  |  | $ 1,000.0 |  |  |  |  |  |
Gas Societal Benefit Clause | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  |  | 18.0 |  |  |  |  |  |  |  |
Electric Societal Benefits Clause | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  |  | (76.0) |  |  |  |  |  |  |  |
Subsequent Event [Member] | Tax Adjustment Credits Electric Distribution [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount | $ 26.0 |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Tax Adjustment Credits Gas Distribution [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount | (48.0) |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Clean Energy Future - Energy Cloud [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Public Utilities, approved investment | 700.0 |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Clean Energy Future - Electric Vehicles [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Public Utilities, approved investment | 166.0 |  |  |  |  |  |  |  |  |  |
Solar or EE Recovery Charge (RRC) [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets |  | 139.0 |  |  |  |  |  |  | 139.0 | 118.0 |
Tax Adjustment Credit [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets |  |  |  |  |  |  |  |  |  |  | $ 581.0
Regulatory Liabilities |  |  |  |  |  |  |  |  |  |  | $ 581.0
COVID-19 Deferral | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets |  | 51.0 |  |  |  |  |  |  | 51.0 | $ 0.0 |
COVID-19 Deferral - Bad Debt portion [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets |  | 29.0 |  |  |  |  |  |  | $ 29.0 |  |
Energy Strong II [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  | (13.0) |  |  |  |  |  |  |  |  |
Gas System Modernization Program II [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  | $ 20.0 |  |  |  | $ 18.0 |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  | $ (26.0) |  |  |  |  |  |  |  |  |
Green Program Recovery Gas portion [Member] | Subsequent Event [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount | 20.0 |  |  |  |  |  |  |  |  |  |
Formula Rate True up | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  |  | $ 119.0 |  |  |  | $ 24.0 |  |  |
Green Program Recovery electric portion [Member] | Subsequent Event [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount | $ 67.0 |  |  |  |  |  |  |  |  |  |

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