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Organization, Basis Of Presentation And Summary Of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Cash, Cash Equivalents and Restricted Cash | The following provides a reconciliation of cash, cash equivalents and restricted cash reported within the Consolidated Balance Sheets that sum to the total of the same such amounts in the Consolidated Statements of Cash Flows for the years ended December 31, 2019 and 2020. Restricted cash consists primarily of deposits received related to various construction projects at PSE&G.
|  | PSE&G |  | PSEG Power |  | Other (A) |  | Consolidated |
|  | Millions |
| As of December 31, 2019 |  |  |  |  |  |  |  |
| Cash and Cash Equivalents | $ | 21 |  |  | $ | 21 |  |  | $ | 105 |  |  | $ | 147 |  |
| Restricted Cash in Other Current Assets | 11 |  |  | — |  |  | — |  |  | 11 |  |
| Restricted Cash in Other Noncurrent Assets | 18 |  |  | — |  |  | — |  |  | 18 |  |
| Cash, Cash Equivalents and Restricted Cash | $ | 50 |  |  | $ | 21 |  |  | $ | 105 |  |  | $ | 176 |  |
| As of December 31, 2020 |  |  |  |  |  |  |  |
| Cash and Cash Equivalents | $ | 204 |  |  | $ | 27 |  |  | $ | 312 |  |  | $ | 543 |  |
| Restricted Cash in Other Current Assets | 7 |  |  | — |  |  | — |  |  | 7 |  |
| Restricted Cash in Other Noncurrent Assets | 22 |  |  | — |  |  | — |  |  | 22 |  |
| Cash, Cash Equivalents and Restricted Cash | $ | 233 |  |  | $ | 27 |  |  | $ | 312 |  |  | $ | 572 |  |
(A)Includes amounts applicable to PSEG (parent company), Energy Holdings and Services.
Depreciation Rate Stated Percentage | PSE&G calculates depreciation under the straight-line method based on estimated average remaining lives of the several classes of depreciable property. These estimates are reviewed on a periodic basis and necessary adjustments are made as approved by the BPU or FERC. The average depreciation rate stated as a percentage of original cost of depreciable property was as follows:
|  |  | 2020 |  | 2019 |  | 2018 |
|  |  | Avg Rate |  | Avg Rate |  | Avg Rate |
| Electric Transmission |  | 2.41 | % |  | 2.41 | % |  | 2.42 | % |
| Electric Distribution |  | 2.55 | % |  | 2.54 | % |  | 2.51 | % |
| Gas Distribution |  | 1.84 | % |  | 1.85 | % |  | 1.61 | % |
PSEG Power calculates depreciation on generation-related assets under the straight-line method based on the assets’ estimated useful lives. The estimated useful lives are: •general plant assets—3 years to 20 years •fossil production assets—30 years to 56 years •nuclear generation assets—approximately 60 years to 80 years •solar assets—25 years to 35 years
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, 2020, 2019 and 2018 were as follows:
|  |  | AFUDC/IDC Capitalized |
|  |  | 2020 |  | 2019 |  | 2018 |
|  |  | Millions |  | Avg Rate |  | Millions |  | Avg Rate |  | Millions |  | Avg Rate |
| PSE&G |  | $ | 112 |  |  | 7.86 | % |  | $ | 81 |  |  | 7.22 | % |  | $ | 70 |  |  | 7.74 | % |
| PSEG Power |  | $ | 10 |  |  | 4.60 | % |  | $ | 27 |  |  | 4.60 | % |  | $ | 67 |  |  | 4.60 | % |

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