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Revenues Revenues (Details) $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2018 USD ($) $ / mwd MW | Sep. 30, 2018 USD ($) | Mar. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Sep. 30, 2017 USD ($) | Jun. 30, 2017 USD ($) | Mar. 31, 2017 USD ($) | Jun. 30, 2018 USD ($) | Dec. 31, 2018 USD ($) $ / mwd MW | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Revenues [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Loss on Lease Investments included in Revenues |  |  |  |  |  |  |  |  |  | $ 8 |  |
Loss on Lease Investments included in Revenues |  |  |  |  |  |  |  |  |  | 20 | $ 77 | $ 147
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 9,337 | 8,347 | 8,174
Revenues Unrelated to Contracts with Customers | [1] |  |  |  |  |  |  |  |  | 359 | 747 | 792
Operating Revenues |  | $ 2,468 | $ 2,394 | $ 2,818 | $ 2,107 | $ 2,254 | $ 2,142 | $ 2,591 | $ 2,016 | 9,696 | 9,094 | 8,966
PSE&G [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 6,398 | 6,259 | 6,285
Revenues Unrelated to Contracts with Customers | [1] |  |  |  |  |  |  |  |  | 73 | 65 | 18
Operating Revenues |  |  |  |  |  |  |  |  |  | 6,471 | 6,324 | 6,303
Power [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 3,899 | 3,133 | 2,975
Revenues Unrelated to Contracts with Customers | [1] |  |  |  |  |  |  |  |  | 247 | 727 | 886
Operating Revenues |  |  |  |  |  |  |  |  |  | 4,146 | 3,860 | 3,861
Revenue, remaining performance obligation, amount |  | 170 |  |  |  |  |  |  |  | 170 |  |
Other [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 532 | 511 | 482
Revenues Unrelated to Contracts with Customers | [1] |  |  |  |  |  |  |  |  | 39 | (45) | (112)
Operating Revenues |  |  |  |  |  |  |  |  |  | 571 | 466 | 370
Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | (1,492) | (1,556) | (1,568)
Revenues Unrelated to Contracts with Customers | [1] |  |  |  |  |  |  |  |  | 0 | 0 | 0
Operating Revenues |  |  |  |  |  |  |  |  |  | (1,492) | (1,556) | (1,568)
LIPA OSA contract fixed component [Member] | Other [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue, remaining performance obligation, amount |  | 64 |  |  |  |  |  |  |  | 64 |  |
Electric Distribution Contracts [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 3,131 | 3,088 | 3,327
Electric Distribution Contracts [Member] | PSE&G [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 3,131 | 3,088 | 3,327
Electric Distribution Contracts [Member] | Power [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Electric Distribution Contracts [Member] | Other [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Electric Distribution Contracts [Member] | Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Gas Distribution Contracts [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 1,738 | 1,670 | 1,560
Gas Distribution Contracts [Member] | PSE&G [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 1,756 | 1,684 | 1,582
Gas Distribution Contracts [Member] | Power [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Gas Distribution Contracts [Member] | Other [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Gas Distribution Contracts [Member] | Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | (18) | (14) | (22)
Transmission [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 1,236 | 1,222 | 1,084
Transmission [Member] | PSE&G [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 1,236 | 1,222 | 1,084
Transmission [Member] | Power [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Transmission [Member] | Other [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Transmission [Member] | Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Other Contract Revenues [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | [2] |  |  |  |  |  |  |  |  | 847 | 814 | 805
Other Contract Revenues [Member] | PSE&G [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | [2] |  |  |  |  |  |  |  |  | 275 | 265 | 292
Other Contract Revenues [Member] | Power [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | [2] |  |  |  |  |  |  |  |  | 44 | 42 | 35
Other Contract Revenues [Member] | Other [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | [2] |  |  |  |  |  |  |  |  | 532 | 511 | 482
Other Contract Revenues [Member] | Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | [2] |  |  |  |  |  |  |  |  | (4) | (4) | (4)
LIPA OSA contract incentive component [Member] | Other [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue, remaining performance obligation, amount |  | $ 10 |  |  |  |  |  |  |  | 10 |  |
ISO New England [Member] | Electricity and Related Products [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 92 | 39 | 55
ISO New England [Member] | Electricity and Related Products [Member] | PSE&G [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
ISO New England [Member] | Electricity and Related Products [Member] | Power [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 92 | 39 | 55
ISO New England [Member] | Electricity and Related Products [Member] | Other [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
ISO New England [Member] | Electricity and Related Products [Member] | Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
NY ISO [Member] | Electricity and Related Products [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 209 | 181 | 169
NY ISO [Member] | Electricity and Related Products [Member] | PSE&G [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
NY ISO [Member] | Electricity and Related Products [Member] | Power [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 209 | 181 | 169
NY ISO [Member] | Electricity and Related Products [Member] | Other [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
NY ISO [Member] | Electricity and Related Products [Member] | Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Third Party Sales [Member] | Natural Gas [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 151 | 134 | 114
Third Party Sales [Member] | Natural Gas [Member] | PSE&G [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Third Party Sales [Member] | Natural Gas [Member] | Power [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 151 | 134 | 114
Third Party Sales [Member] | Natural Gas [Member] | Other [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Third Party Sales [Member] | Natural Gas [Member] | Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Third Party Sales [Member] | PJM [Member] | Electricity and Related Products [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 1,933 | 1,199 | 1,060
Third Party Sales [Member] | PJM [Member] | Electricity and Related Products [Member] | PSE&G [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Third Party Sales [Member] | PJM [Member] | Electricity and Related Products [Member] | Power [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 1,933 | 1,199 | 1,060
Third Party Sales [Member] | PJM [Member] | Electricity and Related Products [Member] | Other [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Third Party Sales [Member] | PJM [Member] | Electricity and Related Products [Member] | Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Affiliated Entity [Member] | Natural Gas [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Affiliated Entity [Member] | Natural Gas [Member] | PSE&G [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Affiliated Entity [Member] | Natural Gas [Member] | Power [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 861 | 804 | 737
Affiliated Entity [Member] | Natural Gas [Member] | Other [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Affiliated Entity [Member] | Natural Gas [Member] | Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | (861) | (804) | (737)
Affiliated Entity [Member] | PJM [Member] | Electricity and Related Products [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Affiliated Entity [Member] | PJM [Member] | Electricity and Related Products [Member] | PSE&G [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Affiliated Entity [Member] | PJM [Member] | Electricity and Related Products [Member] | Power [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 609 | 734 | 805
Affiliated Entity [Member] | PJM [Member] | Electricity and Related Products [Member] | Other [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Affiliated Entity [Member] | PJM [Member] | Electricity and Related Products [Member] | Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  |  |  |  |  |  | $ (609) | $ (734) | $ (805)
June 2018 to May 2019 [Member] | PJM [Member] | Power [Member] |  |  |  |  |  |  |  |  |  |  |  |
Dollars Per Megawatt-Day | $ / mwd |  | 205 |  |  |  |  |  |  |  | 205 |  |
Load (MW) | MW |  | 9,200 |  |  |  |  |  |  |  | 9,200 |  |
June 2018 to May 2019 [Member] | ISO New England [Member] | Power [Member] |  |  |  |  |  |  |  |  |  |  |  |
Dollars Per Megawatt-Day | $ / mwd |  | 314 |  |  |  |  |  |  |  | 314 |  |
Load (MW) | MW |  | 820 |  |  |  |  |  |  |  | 820 |  |
June 2019 to May 2020 [Member] | PJM [Member] | Power [Member] |  |  |  |  |  |  |  |  |  |  |  |
Dollars Per Megawatt-Day | $ / mwd |  | 116 |  |  |  |  |  |  |  | 116 |  |
Load (MW) | MW |  | 8,900 |  |  |  |  |  |  |  | 8,900 |  |
June 2019 to May 2020 [Member] | ISO New England [Member] | Power [Member] |  |  |  |  |  |  |  |  |  |  |  |
Dollars Per Megawatt-Day | $ / mwd |  | 231 |  |  |  |  |  |  |  | 231 |  |
Load (MW) | MW |  | 1,330 |  |  |  |  |  |  |  | 1,330 |  |
June 2020 to May 2021 [Member] | PJM [Member] | Power [Member] |  |  |  |  |  |  |  |  |  |  |  |
Dollars Per Megawatt-Day | $ / mwd |  | 170 |  |  |  |  |  |  |  | 170 |  |
Load (MW) | MW |  | 8,100 |  |  |  |  |  |  |  | 8,100 |  |
June 2020 to May 2021 [Member] | ISO New England [Member] | Power [Member] |  |  |  |  |  |  |  |  |  |  |  |
Dollars Per Megawatt-Day | $ / mwd |  | 195 |  |  |  |  |  |  |  | 195 |  |
Load (MW) | MW |  | 1,330 |  |  |  |  |  |  |  | 1,330 |  |
June 2021 to May 2022 [Member] | PJM [Member] | Power [Member] |  |  |  |  |  |  |  |  |  |  |  |
Dollars Per Megawatt-Day | $ / mwd |  | 178 |  |  |  |  |  |  |  | 178 |  |
Load (MW) | MW |  | 7,700 |  |  |  |  |  |  |  | 7,700 |  |
June 2021 to May 2022 [Member] | ISO New England [Member] | Power [Member] |  |  |  |  |  |  |  |  |  |  |  |
Dollars Per Megawatt-Day | $ / mwd |  | 192 |  |  |  |  |  |  |  | 192 |  |
Load (MW) | MW |  | 950 |  |  |  |  |  |  |  | 950 |  |
June 2022 to May 2023 [Member] | ISO New England [Member] | Power [Member] |  |  |  |  |  |  |  |  |  |  |  |
Dollars Per Megawatt-Day | $ / mwd |  | 231 |  |  |  |  |  |  |  | 231 |  |
Load (MW) | MW |  | 480 |  |  |  |  |  |  |  | 480 |  |
June 2023 to May 2024 [Member] | ISO New England [Member] | Power [Member] |  |  |  |  |  |  |  |  |  |  |  |
Dollars Per Megawatt-Day | $ / mwd |  | 231 |  |  |  |  |  |  |  | 231 |  |
Load (MW) | MW |  | 480 |  |  |  |  |  |  |  | 480 |  |
June 2024 to May 2025 [Member] | ISO New England [Member] | Power [Member] |  |  |  |  |  |  |  |  |  |  |  |
Dollars Per Megawatt-Day | $ / mwd |  | 231 |  |  |  |  |  |  |  | 231 |  |
Load (MW) | MW |  | 480 |  |  |  |  |  |  |  | 480 |  |
June 2025 to May 2026 [Member] | ISO New England [Member] | Power [Member] |  |  |  |  |  |  |  |  |  |  |  |
Dollars Per Megawatt-Day | $ / mwd |  | 231 |  |  |  |  |  |  |  | 231 |  |
Load (MW) | MW |  | 480 |  |  |  |  |  |  |  | 480 |  |
[1] | Includes primarily alternative revenues at PSE&G, derivative contracts at Power, and lease contracts in Other. For the years ended December 31, 2018, 2017 and 2016, Other includes losses of $8 million, $77 million and $147 million, respectively, related to Energy Holdings’ investments in leases. For additional information, see Note 8. Long-Term Investments.
[2] | Includes primarily revenues from appliance repair services at PSE&G, solar power projects and energy management and fuel service contracts with LIPA at Power, and PSEG LI’s OSA with LIPA in Other.

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