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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, 2023 USD ($) | Jan. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Nov. 30, 2022 USD ($) | Oct. 31, 2022 USD ($) | Sep. 30, 2022 USD ($) | Jul. 31, 2022 USD ($) | Jun. 30, 2022 USD ($) | May 31, 2022 USD ($) | Apr. 30, 2022 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Sep. 30, 2018 USD ($)
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
ZEC Charge per kwh |  |  |  |  |  |  |  |  |  |  | $ 0.004 |  |
Regulatory Assets |  |  | $ 4,404,000,000 |  |  |  |  |  |  |  | 4,404,000,000 | $ 3,605,000,000 |
Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
ZEC Charge per kwh |  |  |  |  |  |  |  |  |  |  | 0.004 |  |
Regulatory Assets |  |  | 4,773,000,000 |  |  |  |  |  |  |  | 4,773,000,000 | 3,969,000,000 |
Regulatory Assets |  |  | 4,404,000,000 |  |  |  |  |  |  |  | 4,404,000,000 | 3,605,000,000 |
Public Service Electric and Gas Company | ZEC Liability |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  |  |  |  |  |  |  |  | $ (4,000,000) |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  |  |  |  | $ (1,300,000) |  |  |  |  |  |  |  |
ZEC purchases |  |  |  |  |  |  |  |  |  |  | 161,000,000 |  |
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 |  |  |  |  |  |  |  | $ 15,000,000 |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  |  |  |  | 17,000,000 |  |  |  |  |  |  |  |
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 |  |  |  |  |  |  |  | 31,000,000 |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  |  |  |  | (70,000,000) |  |  |  |  |  |  |  |
Remediation Adjustment Clause [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  |  |  |  | $ 44,000,000 |  |  |  |  |  |  |
Subsequent Event [Member] | Remediation Adjustment Clause [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  | $ 44,000,000 |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Electric Societal Benefits Clause | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  | 52,000,000 |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Gas Societal Benefit Clause | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  | $ 32,000,000 |  |  |  |  |  |  |  |  |  |  |
Solar or EE Recovery Charge (RRC) [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets |  |  | 447,000,000 |  |  |  |  |  |  |  | 447,000,000 | 211,000,000 |
Societal Benefits Charges Sbc [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets |  |  | 145,000,000 |  |  |  |  |  |  |  | 145,000,000 | 139,000,000 |
Societal Benefits Charges Sbc [Member] | Electric Bad Debt Deferral | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets |  |  | 145,000,000 |  |  |  |  |  |  |  | 145,000,000 |  |
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 |  |  | 137,000,000 |  |  |  |  |  |  |  | 137,000,000 | 116,000,000 |
COVID-19 Deferral - Bad Debt portion [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets |  |  | 68,000,000 |  |  |  |  |  |  |  | 68,000,000 |  |
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 |  |  |  | $ 23,000,000 |  |  |  |  | $ 25,000,000 |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  |  | 11,000,000 |  |  |  |  |  |  |  |  |  |
Formula Rate True up | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  |  |  |  |  |  | (1,000,000) |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  |  |  |  | $ 69,000,000 |  |  |  |  |  |  |  |
Green Program Recovery electric portion [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  |  |  |  |  |  | 400,000 |  |  |  |  |
Basic Gas Supply Service | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Proposed BGSS rate per therm |  |  |  |  |  | 0.50 |  |  |  |  |  |  |
Approved BGSS rate per therm |  |  |  |  |  | 0.65 |  |  |  | 0.41 |  |  |
Basic Gas Supply Service | Subsequent Event [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
BGSS self implementing increase (decrease) |  | 0.15 |  |  |  |  |  |  |  |  |  |  |
Gas Green Program Recovery [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  |  |  |  |  |  | 1,000,000 |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  |  |  |  |  |  | $ 8,000,000 |  |  |  |  |  |
Electric Green Program Recovery [Member] | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  |  |  |  |  |  | 4,000,000 |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  |  |  |  |  |  | $ 110,000,000 |  |  |  |  |  |
Public Utilities, Requested Program extension amount |  |  |  |  |  | $ 320,000,000 |  |  |  |  |  |  |
Conservation Incentive Program | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  |  |  |  | $ 53,000,000 |  | 52,000,000 |  |  |  |  |
Regulatory Assets |  |  | $ 72,000,000 |  |  |  |  |  |  |  | $ 72,000,000 | $ 12,000,000 |
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 | $ 54,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Energy Strong II Electric | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  |  |  |  |  |  |  | 17,000,000 |  |  |  |
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 | 16,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Energy Strong II Gas | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  |  |  |  |  |  |  | $ 1,000,000 |  |  |  |
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 | $ 4,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Solar Successor Incentive | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  |  |  |  |  |  | 38,000,000 |  |  |  |  |
Conservation Incentive Program First Twelve Months | Public Service Electric and Gas Company |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  |  |  |  |  |  | $ 18,000,000 |  |  |  |  |

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