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Organization, Basis Of Presentation And Summary Of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Depreciation Rate Stated Percentage | The depreciation rate stated as a percentage of original cost of depreciable property was as follows:
|  |  | 2017 |  | 2016 |  | 2015 |
|  |  | Avg Rate |  | Avg Rate |  | Avg Rate |
| Electric Transmission |  | 2.41 | % |  | 2.39 | % |  | 2.42 | % |
| Electric Distribution |  | 2.51 | % |  | 2.49 | % |  | 2.50 | % |
| Gas Distribution |  | 1.63 | % |  | 1.63 | % |  | 1.64 | % |
Amounts And Average Rates Used To Calculate IDC Or AFUDC | The amounts and average rates used to calculate AFUDC or IDC for the years ended December 31, 2017, 2016 and 2015 were as follows:
|  |  | AFUDC/IDC Capitalized |
|  |  | 2017 |  | 2016 |  | 2015 |
|  |  | Millions |  | Avg Rate |  | Millions |  | Avg Rate |  | Millions |  | Avg Rate |
| PSE&G |  | $ | 73 |  |  | 7.42 | % |  | $ | 66 |  |  | 7.81 | % |  | $ | 65 |  |  | 8.01 | % |
| Power |  | $ | 78 |  |  | 4.60 | % |  | $ | 54 |  |  | 4.87 | % |  | $ | 27 |  |  | 5.14 | % |

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