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Regulatory Assets And Liabilities (Significant Orders and Pending Filings) (Details) | 1 Months Ended | 12 Months Ended |  |  |  |  |
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Feb. 28, 2022 USD ($) | Dec. 31, 2021 USD ($) | Nov. 30, 2021 USD ($) | Oct. 31, 2021 USD ($) | Sep. 30, 2021 USD ($) | Aug. 31, 2021 USD ($) | Jul. 31, 2021 USD ($) | Jun. 30, 2021 USD ($) | May 31, 2021 USD ($) | Apr. 30, 2021 USD ($) | Jan. 31, 2021 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Feb. 01, 2022 | Nov. 01, 2021 | Mar. 31, 2021 | Dec. 31, 2020 USD ($) | Sep. 30, 2018 USD ($)
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ZEC Charge per kwh |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.004 |  |  |  |  |
Regulatory Assets |  | $ 3,605,000,000 |  |  |  |  |  |  |  |  |  |  | 3,605,000,000 |  |  |  | $ 3,872,000,000 |
Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proposed BGSS rate per therm |  |  |  |  |  |  |  | 0.32 |  |  |  |  |  |  |  |  |  |
BGSS balancing charge |  |  |  |  |  |  |  | 0.086 |  |  |  |  |  |  | 0.093 |  |  |
Regulatory Assets |  | 3,969,000,000 |  |  |  |  |  |  |  |  |  |  | 3,969,000,000 |  |  |  | 4,241,000,000 |
Regulatory Assets |  | 3,605,000,000 |  |  |  |  |  |  |  |  |  |  | 3,605,000,000 |  |  |  | 3,872,000,000 |
Public Service Electric and Gas Company | Weather Normalization Clause [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  |  |  | $ (2,000,000) |  |  |  |  |  |  |  |  |  |  |  |  |
Public Service Electric and Gas Company | ZEC Liability |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  |  |  | $ (4,000,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |
ZEC purchases |  |  |  |  |  |  |  |  |  |  |  |  | 157,000,000 |  |  |  |  |
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 |  |  |  |  |  | $ (22,000,000) |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  |  |  | (15,000,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |
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 |  |  |  |  |  | $ 57,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  |  |  | $ (31,000,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Remediation Adjustment Clause [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  |  |  |  |  | $ 35,000,000 |  |  |  |  |  |  |  |  |  |  |
Clean Energy Future - Energy Cloud [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, approved investment |  |  |  |  |  |  |  |  |  |  | $ 707,000,000 |  |  |  |  |  |  |
Clean Energy Future - Electric Vehicles [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, approved investment |  |  |  |  |  |  |  |  |  |  | $ 166,000,000 |  |  |  |  |  |  |
Solar or EE Recovery Charge (RRC) [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets |  | 211,000,000 |  |  |  |  |  |  |  |  |  |  | 211,000,000 |  |  |  | 139,000,000 |
Societal Benefits Charges Sbc [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets |  | 139,000,000 |  |  |  |  |  |  |  |  |  |  | 139,000,000 |  |  |  | 0 |
Societal Benefits Charges Sbc [Member] | Electric Bad Debt Deferral | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets |  | 139,000,000 |  |  |  |  |  |  |  |  |  |  | 139,000,000 |  |  |  |  |
Tax Adjustment Credit [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 581,000,000
COVID-19 Deferral | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets |  | 116,000,000 |  |  |  |  |  |  |  |  |  |  | 116,000,000 |  |  |  | $ 51,000,000 |
COVID-19 Deferral - Bad Debt portion [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets |  | 64,000,000 |  |  |  |  |  |  |  |  |  |  | 64,000,000 |  |  |  |  |
Energy Strong II [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  |  |  |  |  |  |  |  | $ 13,000,000 |  |  |  |  |  |  |  |
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 |  |  | $ 28,000,000 |  |  |  |  |  | $ 21,000,000 |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  | $ 27,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Formula Rate True up | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  |  |  |  |  |  | $ 13,000,000 |  |  |  |  |  |  |  |  |  |
Public Utility Revenue Reduction |  |  |  |  |  |  |  |  |  |  |  |  | $ 64,000,000 |  |  |  |  |
Formula Rate True up | Subsequent Event [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utility Revenue Reduction |  |  |  |  |  |  |  |  |  |  |  | $ 150,000,000 |  |  |  |  |  |
Green Program Recovery electric portion [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  |  |  |  |  |  |  |  | $ 400,000 |  |  |  |  |  |  |  |  |
Basic Gas Supply Service | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Approved BGSS rate per therm |  | 0.36 |  |  |  |  |  |  |  |  |  |  | 0.36 |  |  | 0.32 |  |
Public Utilities, Approved Rate Increase (Decrease), Percentage |  |  | 5.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic Gas Supply Service | Subsequent Event [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Approved BGSS rate per therm |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.41 |  |  |  |
Gas Green Program Recovery [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  |  |  |  |  |  | 2,000,000 |  |  |  |  |  |  |  |  |  |  |
Electric Green Program Recovery [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  |  |  |  |  |  | $ 2,000,000 |  |  |  |  |  |  |  |  |  |  |
Transmission Formula Rate [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Return on Equity, Percentage |  |  |  |  |  | 9.90% | 11.18% |  |  |  |  |  |  |  |  |  |  |
Conservation Incentive Program | Subsequent Event [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount | $ 52,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Energy Strong II Electric | Subsequent Event [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount | 15,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Energy Strong II Gas | Subsequent Event [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount | $ 1,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
SREC II | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  | $ 38,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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