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Financial Information By Business Segments (Financial Information By Business Segments) (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Operating Revenues |  | $ 2,370 |  | $ 2,302 | $ 7,201 |  | $ 7,598 |  |
Net Income (Loss) |  | 575 | [1] | 403 | 1,474 | [1] | 1,256 | [1] |
Property, Plant and Equipment, Additions |  | 678 |  | 779 | 2,092 |  | 2,383 |  |
Total Assets |  | 49,576 |  |  | 49,576 |  |  |  | $ 47,730
Investments in Equity Method Subsidiaries |  | 67 |  |  | 67 |  |  |  | 67
Public Service Electric and Gas Company [Member] |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Operating Revenues |  | 1,660 |  | 1,604 | 4,999 |  | 5,018 |  |
PSEG Power [Member] |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Operating Revenues |  | 746 |  | 771 | 2,649 |  | 3,270 |  |
Gain (Loss) on disposition of Assets, net of tax |  | 86 |  |  | 86 |  | (286) |  |
Other [Member] |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Operating Revenues |  | 143 |  | 151 | 447 |  | 379 |  |
Operating Segments [Member] | Public Service Electric and Gas Company [Member] |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Operating Revenues |  | 1,660 |  | 1,604 | 4,999 |  | 5,018 |  |
Net Income (Loss) |  | 313 |  | 344 | 1,036 |  | 974 |  |
Property, Plant and Equipment, Additions |  | 587 |  | 608 | 1,777 |  | 1,866 |  |
Total Assets |  | 34,833 |  |  | 34,833 |  |  |  | 33,266
Investments in Equity Method Subsidiaries |  | 0 |  |  | 0 |  |  |  | 0
Operating Segments [Member] | PSEG Power [Member] |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Operating Revenues |  | 746 |  | 771 | 2,649 |  | 3,270 |  |
Net Income (Loss) |  | 254 | [1] | 53 | 437 | [1] | 309 | [1] |
Property, Plant and Equipment, Additions |  | 89 |  | 168 | 307 |  | 507 |  |
Total Assets |  | 12,719 |  |  | 12,719 |  |  |  | 12,805
Investments in Equity Method Subsidiaries |  | 66 |  |  | 66 |  |  |  | 66
Operating Segments [Member] | Other [Member] |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Operating Revenues | [2] | 143 |  | 151 | 447 |  | 379 |  |
Net Income (Loss) | [2] | 8 |  | 6 | 1 |  | (27) |  |
Property, Plant and Equipment, Additions | [2] | 2 |  | 3 | 8 |  | 10 |  |
Total Assets | [2] | 2,952 |  |  | 2,952 |  |  |  | 2,715
Investments in Equity Method Subsidiaries | [2] | 1 |  |  | 1 |  |  |  | 1
Eliminations [Member] |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Operating Revenues | [3] | (179) |  | (224) | (894) |  | (1,069) |  |
Net Income (Loss) | [3] | 0 |  | 0 | 0 |  |  |  |
Property, Plant and Equipment, Additions | [3] | 0 |  | 0 | 0 |  | 0 |  |
Total Assets | [3] | (928) |  |  | (928) |  |  |  | (1,056)
Investments in Equity Method Subsidiaries | [3] | 0 |  |  | 0 |  |  |  | 0
PSEG Power [Member] |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Operating Revenues |  | 746 |  | 771 | 2,649 |  | 3,270 |  |
Net Income (Loss) |  | 254 |  | $ 53 | 437 |  | $ 309 |  |
Total Assets |  | $ 12,719 |  |  | $ 12,719 |  |  |  | $ 12,805
[1] | Includes an after-tax gain of $86 million in the three months and nine months ended September 30, 2020 related to the sale of PSEG Power’s interest in the Yards Creek generation facility and an after-tax loss of $286 million in the nine months ended September 30, 2019 related to the sale of PSEG Power’s ownership interests in the Keystone and Conemaugh fossil generation plants. See Item 1. Note 4. Early Plant Retirements/Asset Dispositions for additional information.
[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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