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v3.10.0.1

Rate Filings (Details) - PSE And G [Member] $ in Millions | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jul. 31, 2018 USD ($) | Jun. 30, 2018 USD ($) | Apr. 30, 2018 USD ($) | Jan. 31, 2018 USD ($) | Jun. 30, 2018 USD ($) | Mar. 31, 2018 USD ($) $ / DTH | Jun. 30, 2018 USD ($) | Dec. 31, 2018 | Dec. 31, 2017
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent |  |  |  |  |  |  |  |  | 35.00%
Proposed BGSS rate per therm |  | 0.35 |  |  | 0.35 |  | 0.35 |  |
Self Implementing Bill Credit per therm | $ / DTH |  |  |  |  |  | 0.15 |  |  |
BGSS Revenue Reduction |  | $ 26.0 |  |  |  | $ 125.0 |  |  |
Current BGSS rate per therm |  | 0.37 |  |  | 0.37 |  | 0.37 |  |
True-up adjustment for Transmission Formula Rate Revenues |  | $ (27.0) |  |  | $ (27.0) |  | $ (27.0) |  |
Transmission Formula Rate [Member] |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  |  |  | $ 148.0 |  |  |  |  |
Electric Distribution [Member] |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  |  |  |  |  | 71.0 |  |
Gas Distribution [Member] |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  |  |  |  |  | 43.0 |  |
Distribution Base rates [Member] |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Percentage |  |  |  |  | 3.00% |  |  |  |
Gas Weather Normalization Deferral [Member] |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  | 14.0 | $ 55.0 |  |  |  |  |  |
Subsequent Event [Member] |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent |  |  |  |  |  |  |  | 21.00% |
Subsequent Event [Member] | Gas System Modernization Program [Member] |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount | $ (26.0) |  |  |  |  |  |  |  |
2016 to 2017 [Member] | Gas Weather Normalization Deferral [Member] |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  | 23.0 | 31.0 |  |  |  |  |  |
2015 to 2016 [Member] | Gas Weather Normalization Deferral [Member] |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  | $ 24.0 |  |  |  |  |  |
2017 to 2018 [Member] | Gas Weather Normalization Deferral [Member] |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  | $ 9.0 |  |  |  |  |  |  |
Energy Strong program [Member] | Electric Distribution [Member] |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  |  |  |  |  | 8.0 |  |
Solar or EE Recovery Charge (RRC) [Member] | Electric Distribution [Member] |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  |  |  |  |  | 20.0 |  |
Solar or EE Recovery Charge (RRC) [Member] | Gas Distribution [Member] |  |  |  |  |  |  |  |  |
Regulatory Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  |  |  |  |  | $ (0.8) |  |

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