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Revenues Revenues (Details) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2018 USD ($) $ / mwd MW | Jun. 30, 2017 USD ($) | Mar. 31, 2017 USD ($)
Revenues [Line Items] |  |  |  |
Lease Receivable adjustment |  |  | $ 15 | $ 55
Revenue from Contract with Customers |  | $ 2,644 |  | 2,366
Revenues Unrelated to Contracts with Customers | [1] | 174 |  | 225
Total Operating Revenues |  | 2,818 |  | 2,591
Electric Distribution Contracts [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Revenue from Contract with Customers |  | 690 |  | 701
Gas Distribution [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Revenue from Contract with Customers |  | 756 |  | 754
Electric Transmission [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Revenue from Contract with Customers |  | 312 |  | 299
Electricity and Related Products [Member] | PJM [Member] | Third Party Sales [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Revenue from Contract with Customers |  | 498 |  | 314
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 |  | 59 |  | 36
Electricity and Related Products [Member] | ISO New England [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Revenue from Contract with Customers |  | 47 |  | 11
Gas Sales [Member] | Third Party Sales [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Revenue from Contract with Customers |  | 64 |  | 52
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] | 218 |  | 199
PSE And G [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Revenue from Contract with Customers |  | 1,833 |  | 1,817
Revenues Unrelated to Contracts with Customers | [1] | 12 |  | 9
Total Operating Revenues |  | 1,845 |  | 1,826
PSE And G [Member] | Electric Distribution Contracts [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Revenue from Contract with Customers |  | 690 |  | 701
PSE And G [Member] | Gas Distribution [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Revenue from Contract with Customers |  | 759 |  | 755
PSE And G [Member] | Electric Transmission [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Revenue from Contract with Customers |  | 312 |  | 299
PSE And G [Member] | Electricity and Related Products [Member] | PJM [Member] | Third Party Sales [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Revenue from Contract with Customers |  | 0 |  | 0
PSE And G [Member] | Electricity and Related Products [Member] | PJM [Member] | Sales to Affiliates [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Revenue from Contract with Customers |  | 0 |  | 0
PSE And G [Member] | Electricity and Related Products [Member] | NY ISO [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Revenue from Contract with Customers |  | 0 |  | 0
PSE And G [Member] | Electricity and Related Products [Member] | ISO New England [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Revenue from Contract with Customers |  | 0 |  | 0
PSE And G [Member] | Gas Sales [Member] | Third Party Sales [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Revenue from Contract with Customers |  | 0 |  | 0
PSE And G [Member] | Gas Sales [Member] | Sales to Affiliates [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Revenue from Contract with Customers |  | 0 |  | 0
PSE And G [Member] | Other Revenues from Contracts with Customers [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Revenue from Contract with Customers | [2] | 72 |  | 62
Power [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Revenue from Contract with Customers |  | 1,251 |  | 1,008
Revenues Unrelated to Contracts with Customers | [1] | 152 |  | 261
Total Operating Revenues |  | 1,403 |  | 1,269
Anticipated Contract Revenues |  | $ 180 |  |
Power [Member] | PJM [Member] | June 2017 to May 2018 [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Dollars Per Megawatt-Day | $ / mwd |  | 171 |  |
Load (MW) | MW |  | 9,700 |  |
Power [Member] | PJM [Member] | June 2018 to May 2019 [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Dollars Per Megawatt-Day | $ / mwd |  | 205 |  |
Load (MW) | MW |  | 9,200 |  |
Power [Member] | PJM [Member] | June 2019 to May 2020 [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Dollars Per Megawatt-Day | $ / mwd |  | 116 |  |
Load (MW) | MW |  | 8,900 |  |
Power [Member] | PJM [Member] | June 2020 to May 2021 [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Dollars Per Megawatt-Day | $ / mwd |  | 174 |  |
Load (MW) | MW |  | 7,800 |  |
Power [Member] | ISO New England [Member] | June 2017 to May 2018 [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Dollars Per Megawatt-Day | $ / mwd |  | 231 |  |
Load (MW) | MW |  | 850 |  |
Power [Member] | ISO New England [Member] | June 2018 to May 2019 [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Dollars Per Megawatt-Day | $ / mwd |  | 314 |  |
Load (MW) | MW |  | 830 |  |
Power [Member] | ISO New England [Member] | June 2019 to May 2020 [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Dollars Per Megawatt-Day | $ / mwd |  | 231 |  |
Load (MW) | MW |  | 850 |  |
Power [Member] | ISO New England [Member] | June 2020 to May 2021 [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Dollars Per Megawatt-Day | $ / mwd |  | 174 |  |
Load (MW) | MW |  | 850 |  |
Power [Member] | ISO New England [Member] | June 2021 to May 2022 [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Dollars Per Megawatt-Day | $ / mwd |  | 152 |  |
Load (MW) | MW |  | 460 |  |
Power [Member] | Electric Distribution Contracts [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Revenue from Contract with Customers |  | $ 0 |  | 0
Power [Member] | Gas Distribution [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Revenue from Contract with Customers |  | 0 |  | 0
Power [Member] | Electric Transmission [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Revenue from Contract with Customers |  | 0 |  | 0
Power [Member] | Electricity and Related Products [Member] | PJM [Member] | Third Party Sales [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Revenue from Contract with Customers |  | 498 |  | 314
Power [Member] | Electricity and Related Products [Member] | PJM [Member] | Sales to Affiliates [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Revenue from Contract with Customers |  | 176 |  | 184
Power [Member] | Electricity and Related Products [Member] | NY ISO [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Revenue from Contract with Customers |  | 59 |  | 36
Power [Member] | Electricity and Related Products [Member] | ISO New England [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Revenue from Contract with Customers |  | 47 |  | 11
Power [Member] | Gas Sales [Member] | Third Party Sales [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Revenue from Contract with Customers |  | 64 |  | 52
Power [Member] | Gas Sales [Member] | Sales to Affiliates [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Revenue from Contract with Customers |  | 397 |  | 401
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 |  | 137 |  | 128
Revenues Unrelated to Contracts with Customers | [1] | 10 |  | (45)
Total Operating Revenues |  | 147 |  | 83
Anticipated Contract Revenues |  | 64 |  |
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] | 137 |  | 128
Eliminations [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Revenue from Contract with Customers |  | (577) |  | (587)
Revenues Unrelated to Contracts with Customers | [1] | 0 |  | 0
Total Operating Revenues |  | (577) |  | (587)
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 |  | (3) |  | (1)
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 |  | (176) |  | (184)
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 |  | (397) |  | (401)
Eliminations [Member] | Other Revenues from Contracts with Customers [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Revenue from Contract with Customers | [2] | $ (1) |  | $ (1)
Bridgeport Harbor 5 [Member] | Power [Member] | ISO New England [Member] |  |  |  |
Revenues [Line Items] |  |  |  |
Load (MW) | MW |  | 480 |  |
[1] | Includes primarily alternative revenues at PSE&G, derivative contracts at Power, and lease contracts in Other. In 2017, Other includes a $55 million loss related to Energy Holdings’ investments in leases.
[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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