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Financial Information By Business Segments (Tables) | 12 Months Ended
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Dec. 31, 2017
Segment Reporting [Abstract] |
Financial Information By Business Segments |
|  |  | PSE&G |  | Power |  | Other (A) |  | Eliminations (B) |  | Consolidated Total |
|  |  | Millions |
| Year Ended December 31, 2017 |  |  |  |  |  |  |  |  |  |  |
| Operating Revenues |  | $ | 6,234 |  |  | $ | 3,930 |  |  | $ | 466 |  |  | $ | (1,546 | ) |  | $ | 9,084 |  |
| Depreciation and Amortization |  | 685 |  |  | 1,268 |  |  | 33 |  |  | — |  |  | 1,986 |  |
| Operating Income (Loss) |  | 1,752 |  |  | (359 | ) |  | 36 |  |  | — |  |  | 1,429 |  |
| Income from Equity Method Investments |  | — |  |  | 14 |  |  | — |  |  | — |  |  | 14 |  |
| Interest Income |  | 24 |  |  | 3 |  |  | 5 |  |  | (2 | ) |  | 30 |  |
| Interest Expense |  | 303 |  |  | 50 |  |  | 40 |  |  | (2 | ) |  | 391 |  |
| Income (Loss) before Income Taxes |  | 1,536 |  |  | (250 | ) |  | (18 | ) |  | — |  |  | 1,268 |  |
| Income Tax Expense (Benefit) |  | 563 |  |  | (729 | ) |  | (140 | ) |  | — |  |  | (306 | ) |
| Net Income (Loss) |  | 973 |  |  | 479 |  |  | 122 |  |  | — |  |  | 1,574 |  |
| Gross Additions to Long-Lived Assets |  | $ | 2,919 |  |  | $ | 1,231 |  |  | $ | 40 |  |  | $ | — |  |  | $ | 4,190 |  |
| As of December 31, 2017 |  |  |  |  |  |  |  |  |  |  |
| Total Assets |  | $ | 28,554 |  |  | $ | 12,418 |  |  | $ | 2,666 |  |  | $ | (922 | ) |  | $ | 42,716 |  |
| Investments in Equity Method Subsidiaries |  | $ | — |  |  | $ | 87 |  |  | $ | — |  |  | $ | — |  |  | $ | 87 |  |
|  |  | PSE&G |  | Power |  | Other (A) |  | Eliminations (B) |  | Consolidated Total |
|  |  | Millions |
| Year Ended December 31, 2016 |  |  |  |  |  |  |  |  |  |  |
| Operating Revenues |  | $ | 6,221 |  |  | $ | 4,023 |  |  | $ | 370 |  |  | $ | (1,553 | ) |  | $ | 9,061 |  |
| Depreciation and Amortization |  | 565 |  |  | 881 |  |  | 30 |  |  | — |  |  | 1,476 |  |
| Operating Income (Loss) |  | 1,614 |  |  | 13 |  |  | (51 | ) |  | — |  |  | 1,576 |  |
| Income from Equity Method Investments |  | — |  |  | 11 |  |  | — |  |  | — |  |  | 11 |  |
| Interest Income |  | 24 |  |  | 4 |  |  | 4 |  |  | (2 | ) |  | 30 |  |
| Interest Expense |  | 289 |  |  | 84 |  |  | 14 |  |  | (2 | ) |  | 385 |  |
| Income (Loss) before Income Taxes |  | 1,404 |  |  | (43 | ) |  | (63 | ) |  | — |  |  | 1,298 |  |
| Income Tax Expense (Benefit) |  | 515 |  |  | (61 | ) |  | (43 | ) |  | — |  |  | 411 |  |
| Net Income (Loss) |  | 889 |  |  | 18 |  |  | (20 | ) |  | — |  |  | 887 |  |
| Gross Additions to Long-Lived Assets |  | $ | 2,816 |  |  | $ | 1,343 |  |  | $ | 40 |  |  | $ | — |  |  | $ | 4,199 |  |
| As of December 31, 2016 |  |  |  |  |  |  |  |  |  |  |
| Total Assets |  | $ | 26,288 |  |  | $ | 12,193 |  |  | $ | 2,373 |  |  | $ | (784 | ) |  | $ | 40,070 |  |
| Investments in Equity Method Subsidiaries |  | $ | — |  |  | $ | 102 |  |  | $ | — |  |  | $ | — |  |  | $ | 102 |  |
|  |  | PSE&G |  | Power |  | Other (A) |  | Eliminations (B) |  | Consolidated Total |
|  |  | Millions |
| Year Ended December 31, 2015 |  |  |  |  |  |  |  |  |  |  |
| Operating Revenues |  | $ | 6,636 |  |  | $ | 4,928 |  |  | $ | 462 |  |  | $ | (1,611 | ) |  | $ | 10,415 |  |
| Depreciation and Amortization |  | 892 |  |  | 291 |  |  | 31 |  |  | — |  |  | 1,214 |  |
| Operating Income (Loss) |  | 1,462 |  |  | 1,430 |  |  | 70 |  |  | — |  |  | 2,962 |  |
| Income from Equity Method Investments |  | — |  |  | 14 |  |  | (2 | ) |  | — |  |  | 12 |  |
| Interest Income |  | 25 |  |  | 2 |  |  | 33 |  |  | (29 | ) |  | 31 |  |
| Interest Expense |  | 280 |  |  | 121 |  |  | 21 |  |  | (29 | ) |  | 393 |  |
| Income (Loss) before Income Taxes |  | 1,257 |  |  | 1,367 |  |  | 56 |  |  | — |  |  | 2,680 |  |
| Income Tax Expense (Benefit) |  | 470 |  |  | 511 |  |  | 20 |  |  | — |  |  | 1,001 |  |
| Net Income (Loss) |  | 787 |  |  | 856 |  |  | 36 |  |  | — |  |  | 1,679 |  |
| Gross Additions to Long-Lived Assets |  | $ | 2,692 |  |  | $ | 1,117 |  |  | $ | 54 |  |  | $ | — |  |  | $ | 3,863 |  |
| As of December 31, 2015 |  |  |  |  |  |  |  |  |  |  |
| Total Assets |  | $ | 23,677 |  |  | $ | 12,250 |  |  | $ | 2,810 |  |  | $ | (1,202 | ) |  | $ | 37,535 |  |
| Investments in Equity Method Subsidiaries |  | $ | — |  |  | $ | 119 |  |  | $ | — |  |  | $ | — |  |  | $ | 119 |  |
(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 corporation) and Services.
(B) | Intercompany eliminations primarily relate to intercompany transactions between PSE&G and Power. For a further discussion of the intercompany transactions between PSE&G and Power, see Note 24. Related-Party Transactions.

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8813-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8721-108599 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8736-108599 + Details
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