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Financial Information By Business Segments (Financial Information By Business Segments) (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Operating Revenues |  | $ 1,874 |  | $ 2,050 |  | $ 4,763 |  | $ 4,831 |
Net Income (Loss) |  | (177) |  | 451 |  | 471 |  | 899 |
Property, Plant and Equipment, Additions |  | 670 |  | 694 |  | 1,303 |  | 1,414 |
Total Assets |  | 49,292 |  |  |  | 49,292 |  |  | $ 50,050
Investments in Equity Method Subsidiaries |  | 158 |  |  |  | 158 |  |  | 64
Public Service Electric and Gas Company [Member] |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Operating Revenues |  | 1,514 |  | 1,456 |  | 3,587 |  | 3,339 |
PSEG Power [Member] |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Operating Revenues |  | 380 |  | 683 |  | 1,547 |  | 1,903 |
Other [Member] |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Operating Revenues |  | 155 |  | 148 |  | 306 |  | 304 |
Operating Segments [Member] | Public Service Electric and Gas Company [Member] |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Operating Revenues |  | 1,514 |  | 1,456 |  | 3,587 |  | 3,339 |
Net Income (Loss) |  | 309 |  | 283 |  | 786 |  | 723 |
Property, Plant and Equipment, Additions |  | 633 |  | 570 |  | 1,219 |  | 1,190 |
Total Assets |  | 36,396 |  |  |  | 36,396 |  |  | 35,581
Investments in Equity Method Subsidiaries |  | 0 |  |  |  | 0 |  |  | 0
Operating Segments [Member] | PSEG Power [Member] |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Operating Revenues |  | 380 |  | 683 |  | 1,547 |  | 1,903 |
Net Income (Loss) |  | (483) | [1] | 170 | [1] | (322) | [1] | 183 |
Property, Plant and Equipment, Additions |  | 36 |  | 121 |  | 82 |  | 218 |
Total Assets |  | 11,031 |  |  |  | 11,031 |  |  | 12,704
Investments in Equity Method Subsidiaries |  | 67 |  |  |  | 67 |  |  | 64
Impairment of Long-Lived Assets Held-for-use, net of tax |  | 373 |  |  |  | 373 |  |  |
non trading commodity mark to market gains (losses), net of tax |  | (206) |  | (77) |  | (240) |  |  |
Operating Segments [Member] | Other [Member] |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Operating Revenues | [2] | 155 |  | 148 |  | 306 |  | 304 |
Net Income (Loss) | [2] | (3) |  | (2) |  | 7 |  | (7) |
Property, Plant and Equipment, Additions | [2] | 1 |  | 3 |  | 2 |  | 6 |
Total Assets | [2] | 2,669 |  |  |  | 2,669 |  |  | 2,692
Investments in Equity Method Subsidiaries | [2] | 91 |  |  |  | 91 |  |  | 0
Eliminations [Member] |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Operating Revenues | [3] | (175) |  | (237) |  | (677) |  | (715) |
Net Income (Loss) | [3] | 0 |  | 0 |  | 0 |  | 0 |
Property, Plant and Equipment, Additions | [3] | 0 |  | 0 |  | 0 |  | 0 |
Total Assets | [3] | (804) |  |  |  | (804) |  |  | (927)
Investments in Equity Method Subsidiaries | [3] | 0 |  |  |  | 0 |  |  | 0
PSEG Power [Member] |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Operating Revenues |  | 380 |  | 683 |  | 1,547 |  | 1,903 |
Net Income (Loss) |  | (483) |  | $ 170 |  | (322) |  | $ 183 |
Total Assets |  | $ 11,031 |  |  |  | $ 11,031 |  |  | $ 12,704
[1] | 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.
[2] | 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.
[3] | 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.

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