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Organization and Basis of Presentation Organization and Basis of Presentation (Tables) | 3 Months Ended
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Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Cash, Cash Equivalents and Restricted Cash [Table Text Block] | Cash, Cash Equivalents and Restricted Cash The following provides a reconciliation of cash, cash equivalents and restricted cash reported within the Condensed Consolidated Balance Sheets that sum to the total of the same such amounts for the beginning (December 31, 2020) and ending periods shown in the Condensed Consolidated Statements of Cash Flows for the three months ended March 31, 2021. 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, 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 |  |
| As of March 31, 2021 |  |  |  |  |  |  |  |
| Cash and Cash Equivalents | $ | 631 |  |  | $ | 27 |  |  | $ | 145 |  |  | $ | 803 |  |
| Restricted Cash in Other Current Assets | 14 |  |  | — |  |  | — |  |  | 14 |  |
| Restricted Cash in Other Noncurrent Assets | 24 |  |  | — |  |  | — |  |  | 24 |  |
| Cash, Cash Equivalents and Restricted Cash | $ | 669 |  |  | $ | 27 |  |  | $ | 145 |  |  | $ | 841 |  |
(A)Includes amounts applicable to PSEG (parent company), Energy Holdings and Services.

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