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Financial Information By Business Segments | 6 Months Ended
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Jun. 30, 2021
Segment Reporting Information [Line Items] |
Financial Information By Business Segments | Financial Information by Business Segment
|  | 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.
Public Service Electric and Gas Company [Member] |
Segment Reporting Information [Line Items] |
Financial Information By Business Segments | Financial Information by Business Segment
|  | 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.
PSEG Power [Member] |
Segment Reporting Information [Line Items] |
Financial Information By Business Segments | Financial Information by Business Segment
|  | 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 The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8924-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8981-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8721-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9031-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8844-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -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 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8657-108599 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8721-108599 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -URI http://asc.fasb.org/topic&trid=2134510 + Details
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