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Financial Information By Business Segments (Tables) | 6 Months Ended
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Jun. 30, 2021
Segment Reporting [Abstract] |
Financial Information By Business Segments |
|  | PSE&G |  | PSEG Power |  | Other (A) |  | Eliminations (B) |  | Consolidated Total |
|  | Millions |
| Three Months Ended June 30, 2021 |  |  |  |  |  |  |  |  |  |
| Total Operating Revenues | $ | 1,514 |  |  | $ | 380 |  |  | $ | 155 |  |  | $ | (175) |  |  | $ | 1,874 |  |
| Net Income (Loss) (C) | 309 |  |  | $ | (483) |  |  | (3) |  |  | — |  |  | (177) |  |
| Gross Additions to Long-Lived Assets | 633 |  |  | $ | 36 |  |  | 1 |  |  | — |  |  | 670 |  |
| Six Months Ended June 30, 2021 |  |  |  |  |  |  |  |  |  |
| Operating Revenues | $ | 3,587 |  |  | $ | 1,547 |  |  | $ | 306 |  |  | $ | (677) |  |  | $ | 4,763 |  |
| Net Income (Loss) (C) | 786 |  |  | (322) |  |  | 7 |  |  | — |  |  | 471 |  |
| Gross Additions to Long-Lived Assets | 1,219 |  |  | 82 |  |  | 2 |  |  | — |  |  | 1,303 |  |
| Three Months Ended June 30, 2020 |  |  |  |  |  |  |  |  |  |
| Total Operating Revenues | $ | 1,456 |  |  | $ | 683 |  |  | $ | 148 |  |  | $ | (237) |  |  | $ | 2,050 |  |
| Net Income (Loss) | 283 |  |  | 170 |  |  | (2) |  |  | — |  |  | 451 |  |
| Gross Additions to Long-Lived Assets | 570 |  |  | 121 |  |  | 3 |  |  | — |  |  | 694 |  |
| Six Months Ended June 30, 2020 |  |  |  |  |  |  |  |  |  |
| Operating Revenues | $ | 3,339 |  |  | $ | 1,903 |  |  | $ | 304 |  |  | $ | (715) |  |  | $ | 4,831 |  |
| Net Income (Loss) | 723 |  |  | 183 |  |  | (7) |  |  | — |  |  | 899 |  |
| Gross Additions to Long-Lived Assets | 1,190 |  |  | 218 |  |  | 6 |  |  | — |  |  | 1,414 |  |
| As of June 30, 2021 |  |  |  |  |  |  |  |  |  |
| Total Assets | $ | 36,396 |  |  | $ | 11,031 |  |  | $ | 2,669 |  |  | $ | (804) |  |  | $ | 49,292 |  |
| Investments in Equity Method Subsidiaries | $ | — |  |  | $ | 67 |  |  | $ | 91 |  |  | $ | — |  |  | $ | 158 |  |
| As of December 31, 2020 |  |  |  |  |  |  |  |  |  |
| Total Assets | $ | 35,581 |  |  | $ | 12,704 |  |  | $ | 2,692 |  |  | $ | (927) |  |  | $ | 50,050 |  |
| Investments in Equity Method Subsidiaries | $ | — |  |  | $ | 64 |  |  | $ | — |  |  | $ | — |  |  | $ | 64 |  |
(A)Includes amounts applicable to Energy Holdings and PSEG LI, which are below the quantitative threshold for separate disclosure as reportable segments. Other also includes amounts applicable to PSEG (parent company) and Services. (B)Intercompany eliminations primarily relate to intercompany transactions between PSE&G and PSEG Power. For a further discussion of the intercompany transactions between PSE&G and PSEG Power, see Note 20. Related-Party Transactions. (C)Includes a $373 million after-tax impairment of the ISO NE asset grouping at PSEG Power in the three and six months ended June 30, 2021. See Note 4. Early Plant Retirements/Asset Dispositions and Impairments for additional information. Also includes net after-tax losses of $(206) million and $(77) million for the three months ended June 30, 2021 and 2020, respectively, and $(240) million for the six months ended June 30, 2021 related to the impacts of non-trading commodity mark-to-market activity, which consist of the financial impact from positions with future delivery dates.

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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8813-108599 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599 + Details
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