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Regulatory Assets And Liabilities (Significant Orders and Pending Filings) (Details) $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jan. 31, 2018 USD ($) | Oct. 31, 2017 USD ($) | Aug. 31, 2017 USD ($) | Jun. 30, 2017 USD ($) | Apr. 30, 2017 USD ($) | Nov. 30, 2016 USD ($) | Jul. 31, 2016 USD ($) | Apr. 30, 2016 USD ($) | Dec. 31, 2018 | Mar. 31, 2018 USD ($) $ / DTH | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Oct. 01, 2017
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum U.S. Corporate Income Tax Rate |  |  |  |  |  |  |  |  |  |  |  | 35.00% |
PSE&G [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Storm and Property Reserve Deficiency, Noncurrent |  |  |  |  |  |  |  |  |  |  |  | $ 220 |
Current BGSS rate per therm |  |  |  |  |  |  |  |  |  |  |  | 0.34 |
Proposed BGSS rate per therm |  |  |  |  |  |  |  |  |  |  |  |  | 0.37
True-up adjustment for Transmission Formula Rate Revenues |  |  |  | $ (12) |  |  |  |  |  |  |  | $ (16) |
Maximum U.S. Corporate Income Tax Rate |  |  |  |  |  |  |  |  |  |  |  | 35.00% |
Transmission Formula Rate [Member] | PSE&G [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  | $ 212 |  |  |  |  |  |  |  |  |  |  |
Gas Distribution [Member] | PSE&G [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  |  |  |  |  |  |  |  |  |  | $ 2 |
Electric Distribution [Member] | PSE&G [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  |  |  |  |  |  |  |  |  |  | 16 |
Weather Normalization Clause [Member] | PSE&G [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  |  |  |  |  |  | $ 55 |  |  |  |  |  |
Remediation Adjustment Charge (Other SBC) [Member] | PSE&G [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  |  |  |  |  | $ 63 |  | $ 41 |  |  |  |  |
Electric Green Program Recovery [Member] | PSE&G [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  |  |  |  |  |  |  |  |  |  |  | 47 |
Gas Green Program Recovery [Member] | PSE&G [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  |  |  |  |  |  |  |  |  |  |  | 13 |
Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum U.S. Corporate Income Tax Rate |  |  |  |  |  |  |  |  |  |  | 21.00% |  |
Subsequent Event [Member] | PSE&G [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Self Implementing Bill Credit per therm | $ / DTH |  |  |  |  |  |  |  |  |  | 0.15 |  |  |
BGSS Revenue Reduction |  |  |  |  |  |  |  |  |  | $ 100 |  |  |
Maximum U.S. Corporate Income Tax Rate |  |  |  |  |  |  |  |  |  |  | 21.00% |  |
Subsequent Event [Member] | Distribution Base rates [Member] | PSE&G [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Percentage |  |  |  |  |  |  |  |  | 1.00% |  |  |  |
Subsequent Event [Member] | Transmission Formula Rate [Member] | PSE&G [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount | $ 148 |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amended, Amount | $ 64 |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Gas System Modernization Program [Member] | PSE&G [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  |  |  |  |  |  |  |  |  |  | $ 25 |  |
Subsequent Event [Member] | Electric Distribution [Member] | PSE&G [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  |  |  |  |  |  |  |  |  | $ 8 |  |
2015 to 2016 [Member] | Weather Normalization Clause [Member] | PSE&G [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  |  |  | $ 54 |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  |  |  | 24 |  |  |  |  |  |  |  |  |
2016 to 2017 [Member] | Weather Normalization Clause [Member] | PSE&G [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  |  |  | $ 31 |  |  |  |  |  |  |  |  |
Solar or EE Recovery Charge (RRC) [Member] | PSE&G [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Additional Capital Expenditures |  |  | $ 69 |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Additional Costs |  |  | $ 16 |  |  |  |  |  |  |  |  |  |
Solar or EE Recovery Charge (RRC) [Member] | Gas Distribution [Member] | PSE&G [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  |  |  |  |  |  |  |  |  |  | 13 |
Solar or EE Recovery Charge (RRC) [Member] | Electric Distribution [Member] | PSE&G [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  |  |  |  |  |  |  |  |  |  | 37 |
Stranded Costs [Member] | PSE&G [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  |  |  |  |  |  |  |  |  |  | $ (5) |

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