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Revenues Revenues (Details) $ in Millions | 3 Months Ended |  |  |
--- | --- | --- | --- | ---
Mar. 31, 2020 USD ($) $ / mwd MW | Mar. 31, 2019 USD ($) | Jan. 01, 2020 USD ($) | Dec. 31, 2019 USD ($) | Jan. 01, 2019 USD ($)
Revenues [Line Items] |  |  |  |  |  |
Cumulative Effect Adjustment |  |  |  |  | $ (2) | $ 81
Revenue from Contract with Customers |  | $ 2,449 | $ 2,786 |  |  |
Revenues Unrelated to Contracts with Customers | [1] | 332 | 194 |  |  |
Total Operating Revenues |  | 2,781 | 2,980 |  |  |
Electric Distribution Contracts [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 649 | 742 |  |  |
Gas Distribution [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 729 | 928 |  |  |
Electric Transmission [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 366 | 288 |  |  |
Electricity and Related Products [Member] | PJM [Member] | Third Party Sales [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 368 | 515 |  |  |
Electricity and Related Products [Member] | PJM [Member] | Sales to Affiliates [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 0 | 0 |  |  |
Electricity and Related Products [Member] | NY ISO [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 25 | 41 |  |  |
Electricity and Related Products [Member] | ISO New England [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 48 | 21 |  |  |
Gas Sales [Member] | Third Party Sales [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 29 | 47 |  |  |
Gas Sales [Member] | Sales to Affiliates [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 0 | 0 |  |  |
Other Revenues from Contracts with Customers [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers | [2] | $ 235 | 204 |  |  |
Public Service Electric and Gas Company [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Allowances percentage of accounts receivable |  | 7.00% |  |  | 6.00% |
Revenue from Contract with Customers |  | $ 1,828 | 2,025 |  |  |
Revenues Unrelated to Contracts with Customers | [1] | 55 | 7 |  |  |
Total Operating Revenues |  | 1,883 | 2,032 |  |  |
Public Service Electric and Gas Company [Member] | Electric Distribution Contracts [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 649 | 742 |  |  |
Public Service Electric and Gas Company [Member] | Gas Distribution [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 731 | 931 |  |  |
Public Service Electric and Gas Company [Member] | Electric Transmission [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 366 | 288 |  |  |
Public Service Electric and Gas Company [Member] | Electricity and Related Products [Member] | PJM [Member] | Third Party Sales [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 0 | 0 |  |  |
Public Service Electric and Gas Company [Member] | Electricity and Related Products [Member] | PJM [Member] | Sales to Affiliates [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 0 | 0 |  |  |
Public Service Electric and Gas Company [Member] | Electricity and Related Products [Member] | NY ISO [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 0 | 0 |  |  |
Public Service Electric and Gas Company [Member] | Electricity and Related Products [Member] | ISO New England [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 0 | 0 |  |  |
Public Service Electric and Gas Company [Member] | Gas Sales [Member] | Third Party Sales [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 0 | 0 |  |  |
Public Service Electric and Gas Company [Member] | Gas Sales [Member] | Sales to Affiliates [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 0 | 0 |  |  |
Public Service Electric and Gas Company [Member] | Other Revenues from Contracts with Customers [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers | [2] | 82 | 64 |  |  |
PSEG Power [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 955 | 1,239 |  |  |
Revenues Unrelated to Contracts with Customers | [1] | 265 | 177 |  |  |
Total Operating Revenues |  | 1,220 | 1,416 |  |  |
Anticipated Contract Revenues |  | $ 161 |  |  |  |
PSEG Power [Member] | PJM [Member] | June 2019 to May 2020 [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Dollars Per Megawatt-Day | $ / mwd |  | 116 |  |  |  |
Load (MW) | MW |  | 8,300 |  |  |  |
PSEG Power [Member] | PJM [Member] | June 2020 to May 2021 [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Dollars Per Megawatt-Day | $ / mwd |  | 179 |  |  |  |
Load (MW) | MW |  | 7,300 |  |  |  |
PSEG Power [Member] | PJM [Member] | June 2021 to May 2022 [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Dollars Per Megawatt-Day | $ / mwd |  | 182 |  |  |  |
Load (MW) | MW |  | 6,900 |  |  |  |
PSEG Power [Member] | ISO New England [Member] | June 2019 to May 2020 [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Dollars Per Megawatt-Day | $ / mwd |  | 231 |  |  |  |
Load (MW) | MW |  | 1,330 |  |  |  |
PSEG Power [Member] | ISO New England [Member] | June 2020 to May 2021 [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Dollars Per Megawatt-Day | $ / mwd |  | 195 |  |  |  |
Load (MW) | MW |  | 1,330 |  |  |  |
PSEG Power [Member] | ISO New England [Member] | June 2021 to May 2022 [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Dollars Per Megawatt-Day | $ / mwd |  | 192 |  |  |  |
Load (MW) | MW |  | 950 |  |  |  |
PSEG Power [Member] | ISO New England [Member] | June 2022 to May 2023 [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Dollars Per Megawatt-Day | $ / mwd |  | 179 |  |  |  |
Load (MW) | MW |  | 950 |  |  |  |
PSEG Power [Member] | ISO New England [Member] | June 2023 to May 2024 [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Dollars Per Megawatt-Day | $ / mwd |  | 141 |  |  |  |
Load (MW) | MW |  | 1,060 |  |  |  |
PSEG Power [Member] | ISO New England [Member] | June 2024 to May 2025 [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Dollars Per Megawatt-Day | $ / mwd |  | 231 |  |  |  |
Load (MW) | MW |  | 480 |  |  |  |
PSEG Power [Member] | ISO New England [Member] | June 2025 to May 2026 [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Dollars Per Megawatt-Day | $ / mwd |  | 231 |  |  |  |
Load (MW) | MW |  | 480 |  |  |  |
PSEG Power [Member] | Electric Distribution Contracts [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | $ 0 | 0 |  |  |
PSEG Power [Member] | Gas Distribution [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 0 | 0 |  |  |
PSEG Power [Member] | Electric Transmission [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 0 | 0 |  |  |
PSEG Power [Member] | Electricity and Related Products [Member] | PJM [Member] | Third Party Sales [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 368 | 515 |  |  |
PSEG Power [Member] | Electricity and Related Products [Member] | PJM [Member] | Sales to Affiliates [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 121 | 126 |  |  |
PSEG Power [Member] | Electricity and Related Products [Member] | NY ISO [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 25 | 41 |  |  |
PSEG Power [Member] | Electricity and Related Products [Member] | ISO New England [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 48 | 21 |  |  |
PSEG Power [Member] | Gas Sales [Member] | Third Party Sales [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 29 | 47 |  |  |
PSEG Power [Member] | Gas Sales [Member] | Sales to Affiliates [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 354 | 479 |  |  |
PSEG Power [Member] | Other Revenues from Contracts with Customers [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers | [2] | 10 | 10 |  |  |
Other [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 144 | 131 |  |  |
Revenues Unrelated to Contracts with Customers | [1] | 12 | 10 |  |  |
Total Operating Revenues |  | 156 | 141 |  |  |
Other [Member] | LIPA OSA contract fixed component [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Anticipated Contract Revenues |  | 67 |  |  |  |
Other [Member] | Electric Distribution Contracts [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 0 | 0 |  |  |
Other [Member] | Gas Distribution [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 0 | 0 |  |  |
Other [Member] | Electric Transmission [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 0 | 0 |  |  |
Other [Member] | Electricity and Related Products [Member] | PJM [Member] | Third Party Sales [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 0 | 0 |  |  |
Other [Member] | Electricity and Related Products [Member] | PJM [Member] | Sales to Affiliates [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 0 | 0 |  |  |
Other [Member] | Electricity and Related Products [Member] | NY ISO [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 0 | 0 |  |  |
Other [Member] | Electricity and Related Products [Member] | ISO New England [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 0 | 0 |  |  |
Other [Member] | Gas Sales [Member] | Third Party Sales [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 0 | 0 |  |  |
Other [Member] | Gas Sales [Member] | Sales to Affiliates [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 0 | 0 |  |  |
Other [Member] | Other Revenues from Contracts with Customers [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers | [2] | 144 | 131 |  |  |
Eliminations [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | (478) | (609) |  |  |
Revenues Unrelated to Contracts with Customers | [1] | 0 | 0 |  |  |
Total Operating Revenues |  | (478) | (609) |  |  |
Eliminations [Member] | Electric Distribution Contracts [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 0 | 0 |  |  |
Eliminations [Member] | Gas Distribution [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | (2) | (3) |  |  |
Eliminations [Member] | Electric Transmission [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 0 | 0 |  |  |
Eliminations [Member] | Electricity and Related Products [Member] | PJM [Member] | Third Party Sales [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 0 | 0 |  |  |
Eliminations [Member] | Electricity and Related Products [Member] | PJM [Member] | Sales to Affiliates [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | (121) | (126) |  |  |
Eliminations [Member] | Electricity and Related Products [Member] | NY ISO [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 0 | 0 |  |  |
Eliminations [Member] | Electricity and Related Products [Member] | ISO New England [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 0 | 0 |  |  |
Eliminations [Member] | Gas Sales [Member] | Third Party Sales [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | 0 | 0 |  |  |
Eliminations [Member] | Gas Sales [Member] | Sales to Affiliates [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers |  | (354) | (479) |  |  |
Eliminations [Member] | Other Revenues from Contracts with Customers [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Revenue from Contract with Customers | [2] | (1) | (1) |  |  |
Public Service Electric and Gas Company [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Accounts Receivable, Allowance for Credit Loss, Recovery |  | 2 |  |  |  |
Cumulative Effect Adjustment |  |  |  |  | $ (2) |
Accounts Receivable and Unbilled Revenues, Allowance for Credit Losses |  | 80 |  | $ 68 |  |
Provision for Other Credit Losses |  | 32 |  |  |  |
Accounts Receivable, Allowance for Credit Loss, Writeoff |  | (20) |  |  |  |
Total Operating Revenues |  | $ 1,883 | $ 2,032 |  |  |
Allowance for Credit Losses [Member] | Accounting Standards Update 2016-13 [Member] | Public Service Electric and Gas Company [Member] |  |  |  |  |  |
Revenues [Line Items] |  |  |  |  |  |
Cumulative Effect Adjustment |  |  |  | $ 8 |  |
[1] | Includes primarily alternative revenues at PSE&G, derivative contracts and lease contracts at PSEG Power, and lease contracts in Other.
[2] | Includes primarily revenues from appliance repair services at PSE&G, solar power projects and energy management and fuel service contracts with LIPA at PSEG Power, and PSEG LI’s OSA with LIPA in Other.

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