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Revenues Revenues (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2018
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue [Table Text Block] | Disaggregation of Revenues
|  | PSE&G |  | Power |  | Other |  | Eliminations |  | Consolidated |
|  | Millions |
| Three Months Ended March 31, 2018 |  |  |  |  |  |  |  |  |  |
| Revenues from Contracts with Customers |  |  |  |  |  |  |  |  |  |
| Electric Distribution | $ | 690 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 690 |  |
| Gas Distribution | 759 |  |  | — |  |  | — |  |  | (3 | ) |  | 756 |  |
| Transmission | 312 |  |  | — |  |  | — |  |  | — |  |  | 312 |  |
| Electricity and Related Product Sales |  |  |  |  |  |  |  |  |  |  |
| PJM |  |  |  |  |  |  |  |  |  |  |
| Third Party Sales | — |  |  | 498 |  |  | — |  |  | — |  |  | 498 |  |
| Sales to Affiliates | — |  |  | 176 |  |  | — |  |  | (176 | ) |  | — |  |
| New York ISO | — |  |  | 59 |  |  | — |  |  | — |  |  | 59 |  |
| ISO New England | — |  |  | 47 |  |  | — |  |  | — |  |  | 47 |  |
| Gas Sales |  |  |  |  |  |  |  |  |  |  |
| Third Party Sales | — |  |  | 64 |  |  | — |  |  | — |  |  | 64 |  |
| Sales to Affiliates | — |  |  | 397 |  |  | — |  |  | (397 | ) |  | — |  |
| Other Revenues from Contracts with Customers (A) | 72 |  |  | 10 |  |  | 137 |  |  | (1 | ) |  | 218 |  |
| Total Revenues from Contracts with Customers | 1,833 |  |  | 1,251 |  |  | 137 |  |  | (577 | ) |  | 2,644 |  |
| Revenues Unrelated to Contracts with Customers (B) | 12 |  |  | 152 |  |  | 10 |  |  | — |  |  | 174 |  |
| Total Operating Revenues | $ | 1,845 |  |  | $ | 1,403 |  |  | $ | 147 |  |  | $ | (577 | ) |  | $ | 2,818 |  |
|  | PSE&G |  | Power |  | Other |  | Eliminations |  | Consolidated |
|  | Millions |
| Three Months Ended March 31, 2017 |  |  |  |  |  |  |  |  |  |
| Revenues from Contracts with Customers |  |  |  |  |  |  |  |  |  |
| Electric Distribution | $ | 701 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 701 |  |
| Gas Distribution | 755 |  |  | — |  |  | — |  |  | (1 | ) |  | 754 |  |
| Transmission | 299 |  |  | — |  |  | — |  |  | — |  |  | 299 |  |
| Electricity and Related Product Sales |  |  |  |  |  |  |  |  |  |  |
| PJM |  |  |  |  |  |  |  |  |  |  |
| Third Party Sales | — |  |  | 314 |  |  | — |  |  | — |  |  | 314 |  |
| Sales to Affiliates | — |  |  | 184 |  |  | — |  |  | (184 | ) |  | — |  |
| New York ISO | — |  |  | 36 |  |  | — |  |  | — |  |  | 36 |  |
| ISO New England | — |  |  | 11 |  |  | — |  |  | — |  |  | 11 |  |
| Gas Sales |  |  |  |  |  |  |  |  |  |  |
| Third Party Sales | — |  |  | 52 |  |  | — |  |  | — |  |  | 52 |  |
| Sales to Affiliates | — |  |  | 401 |  |  | — |  |  | (401 | ) |  | — |  |
| Other Revenues from Contracts with Customers (A) | 62 |  |  | 10 |  |  | 128 |  |  | (1 | ) |  | 199 |  |
| Total Revenues from Contracts with Customers | 1,817 |  |  | 1,008 |  |  | 128 |  |  | (587 | ) |  | 2,366 |  |
| Revenues Unrelated to Contracts with Customers (B) | 9 |  |  | 261 |  |  | (45 | ) |  | — |  |  | 225 |  |
| Total Operating Revenues | $ | 1,826 |  |  | $ | 1,269 |  |  | $ | 83 |  |  | $ | (587 | ) |  | $ | 2,591 |  |
(A) | 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.
(B) | 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.
Revenue, Capacity Auction Obligations [Table Text Block] | Capacity Payments from the PJM RPM Annual Base Residual and Incremental Auctions—The Base Residual Auction is conducted annually three years in advance of the operating period. Power expects to realize the following average capacity prices for capacity obligations to be satisfied resulting from the base and incremental auctions which have been completed:
| Delivery Year |  | $ per MW-Day |  | MW Cleared |
| June 2017 to May 2018 |  | $171 |  | 9,700 |  |
| June 2018 to May 2019 |  | $205 |  | 9,200 |  |
| June 2019 to May 2020 |  | $116 |  | 8,900 |  |
| June 2020 to May 2021 |  | $174 |  | 7,800 |  |
Capacity Payments from the New England ISO Forward Capacity Market—The Forward Capacity Market Auction is conducted annually three years in advance of the operating period. Power expects to realize the following average capacity prices through May 2022 for capacity obligations to be satisfied resulting from the Forward Capacity Market auctions which have been completed:
| Delivery Year |  | $ per MW-Day |  | MW Cleared |
| June 2017 to May 2018 |  | $231 |  | 850 |  |
| June 2018 to May 2019 |  | $314 |  | 830 |  |
| June 2019 to May 2020 |  | $231 |  | 850 |  |
| June 2020 to May 2021 |  | $174 |  | 850 |  |
| June 2021 to May 2022 |  | $152 |  | 460 |  |

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