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Selected Quarterly Data (Tables) | 12 Months Ended
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Dec. 31, 2018
Schedule of Quarterly Data [Line Items] |
Schedule Of Selected Quarterly Data | The information shown in the following tables, in the opinion of PSEG, PSE&G and Power includes all adjustments, consisting only of normal recurring accruals, necessary to fairly present such amounts.
|  |  | Quarter Ended |
|  |  | March 31, (A) |  | June 30, (A) |  | September 30, |  | December 31, (A) |
|  |  | 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017 |
| PSEG Consolidated: |  | Millions, except per share data |
| Operating Revenues |  | $ | 2,818 |  |  | $ | 2,591 |  |  | $ | 2,016 |  |  | $ | 2,142 |  |  | $ | 2,394 |  |  | $ | 2,254 |  |  | $ | 2,468 |  |  | $ | 2,107 |  |
| Operating Income |  | $ | 832 |  |  | $ | 178 |  |  | $ | 411 |  |  | $ | 195 |  |  | $ | 554 |  |  | $ | 693 |  |  | $ | 501 |  |  | $ | 363 |  |
| Net Income |  | $ | 558 |  |  | $ | 114 |  |  | $ | 269 |  |  | $ | 109 |  |  | $ | 412 |  |  | $ | 395 |  |  | $ | 199 |  |  | $ | 956 |  |
| Earnings Per Share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Basic: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Net Income |  | $ | 1.11 |  |  | $ | 0.23 |  |  | $ | 0.53 |  |  | $ | 0.22 |  |  | $ | 0.82 |  |  | $ | 0.78 |  |  | $ | 0.39 |  |  | $ | 1.89 |  |
| Diluted: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Net Income |  | $ | 1.10 |  |  | $ | 0.22 |  |  | $ | 0.53 |  |  | $ | 0.22 |  |  | $ | 0.81 |  |  | $ | 0.78 |  |  | $ | 0.39 |  |  | $ | 1.88 |  |
| Weighted Average Common Shares Outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Basic |  | 504 |  |  | 505 |  |  | 504 |  |  | 505 |  |  | 504 |  |  | 505 |  |  | 504 |  |  | 505 |  |
| Diluted |  | 507 |  |  | 508 |  |  | 507 |  |  | 507 |  |  | 507 |  |  | 507 |  |  | 508 |  |  | 508 |  |
PSE&G [Member] |
Schedule of Quarterly Data [Line Items] |
Schedule Of Selected Quarterly Data |
|  |  | Quarter Ended |
|  |  | March 31, |  | June 30, |  | September 30, |  | December 31, |
|  |  | 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017 |
| PSE&G: |  | Millions |
| Operating Revenues |  | $ | 1,845 |  |  | $ | 1,826 |  |  | $ | 1,386 |  |  | $ | 1,393 |  |  | $ | 1,595 |  |  | $ | 1,530 |  |  | $ | 1,645 |  |  | $ | 1,575 |  |
| Operating Income |  | $ | 482 |  |  | $ | 523 |  |  | $ | 358 |  |  | $ | 380 |  |  | $ | 421 |  |  | $ | 461 |  |  | $ | 345 |  |  | $ | 396 |  |
| Net Income |  | $ | 319 |  |  | $ | 299 |  |  | $ | 231 |  |  | $ | 208 |  |  | $ | 278 |  |  | $ | 246 |  |  | $ | 239 |  |  | $ | 220 |  |
Power [Member] |
Schedule of Quarterly Data [Line Items] |
Schedule Of Selected Quarterly Data |
|  |  | Quarter Ended |
|  |  | March 31, (A) |  | June 30, (A) |  | September 30, |  | December 31, (A) |
|  |  | 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017 |
| Power: |  | Millions |
| Operating Revenues |  | $ | 1,403 |  |  | $ | 1,269 |  |  | $ | 767 |  |  | $ | 918 |  |  | $ | 868 |  |  | $ | 846 |  |  | $ | 1,108 |  |  | $ | 827 |  |
| Operating Income (Loss) |  | $ | 329 |  |  | $ | (305 | ) |  | $ | 42 |  |  | $ | (189 | ) |  | $ | 112 |  |  | $ | 211 |  |  | $ | 113 |  |  | $ | (84 | ) |
| Net Income (Loss) |  | $ | 234 |  |  | $ | (170 | ) |  | $ | 41 |  |  | $ | (97 | ) |  | $ | 125 |  |  | $ | 136 |  |  | $ | (35 | ) |  | $ | 610 |  |
(A) | The increases in Operating Income at PSEG consolidated and Power in the first and second quarters of 2018 as compared to the same quarters in 2017 were primarily due to higher costs in 2017 related to closing the coal/gas Hudson and Mercer units, which were fully depreciated as of June 1, 2017. The increases in Operating Income at PSEG consolidated and Power in the fourth quarter 2018 as compared to the same quarter in 2017 were primarily due to lower MTM losses and a gain on the sale of the Hudson and Mercer units.
The decreases in Net Income at PSEG consolidated and Power in the fourth quarter 2018 as compared to the same quarter in 2017 also reflected the impact of the one-time benefit recorded in December 2017 as a result of the remeasurement of deferred tax balances and the inclusion in 2018 of net unrealized losses on equity investments in the NDT Fund in accordance with new accounting guidance.

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109225645&loc=d3e1280-108306 + Details
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