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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, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014 | Dec. 31, 2014
Segment Reporting Information [Line Items] |  |  |  |  |  |
Operating Revenues |  | $ 2,688 | $ 2,641 | $ 8,137 | $ 8,113 |
Net Income (Loss) |  | 439 | 444 | 1,370 | 1,042 |
Property, Plant and Equipment, Additions |  | 1,039 | 693 | 2,782 | 1,922 |
Total Assets |  | 36,424 |  | 36,424 |  | $ 35,333
Investments in Equity Method Subsidiaries |  | 117 |  | 117 |  | 123
Operating Segments [Member] | PSE And G [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Operating Revenues |  | 1,766 | 1,655 | 5,234 | 5,235 |
Net Income (Loss) |  | 222 | 200 | 631 | 565 |
Property, Plant and Equipment, Additions |  | 716 | 497 | 1,946 | 1,493 |
Total Assets |  | 22,909 |  | 22,909 |  | 22,223
Investments in Equity Method Subsidiaries |  | 0 |  | 0 |  | 0
Operating Segments [Member] | Power [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Operating Revenues |  | 1,096 | 1,138 | 3,846 | 3,824 |
Net Income (Loss) |  | 206 | 222 | 707 | 440 |
Property, Plant and Equipment, Additions |  | 310 | 188 | 797 | 414 |
Total Assets |  | 12,314 |  | 12,314 |  | 12,046
Investments in Equity Method Subsidiaries |  | 116 |  | 116 |  | 121
Operating Segments [Member] | Other [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Operating Revenues | [1] | 120 | 123 | 326 | 359 |
Net Income (Loss) | [1] | 11 | 22 | 32 | 37 |
Property, Plant and Equipment, Additions | [1] | 13 | 8 | 39 | 15 |
Total Assets | [1] | 2,775 |  | 2,775 |  | 2,799
Investments in Equity Method Subsidiaries | [1] | 1 |  | 1 |  | 2
Eliminations [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Operating Revenues | [2] | (294) | (275) | (1,269) | (1,305) |
Net Income (Loss) | [2] | 0 | 0 | 0 | 0 |
Property, Plant and Equipment, Additions | [2] | 0 | $ 0 | 0 | $ 0 |
Total Assets | [2] | (1,574) |  | (1,574) |  | (1,735)
Investments in Equity Method Subsidiaries | [2] | $ 0 |  | $ 0 |  | $ 0
[1] | 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.
[2] | Intercompany eliminations, primarily related to intercompany transactions between PSE&G and Power. No gains or losses are recorded on any intercompany transactions; rather, all intercompany transactions are at cost or, in the case of the BGS and BGSS contracts between PSE&G and Power, at rates prescribed by the BPU. For a further discussion of the intercompany transactions between PSE&G and Power, see Note 17. Related-Party Transactions.

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