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Long-Term Investments (Schedule Of Long Term Investments) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Long-Term Investments [Line Items] |  |  |  |  |  |  |  |
Total Long-Term Investments |  |  |  | $ 1,050 |  | $ 932 | $ 1,050 |
Dividends in equity method investments |  |  |  |  |  | 18 | 18 | $ 16
Provision for Loan and Lease Losses |  | $ 7 | $ 55 | 10 | $ 137 |  |  |
Financing Receivable, Allowance for Credit Losses, Write-downs |  | $ 15 |  |  |  |  |  |
Power [Member] |  |  |  |  |  |  |  |
Long-Term Investments [Line Items] |  |  |  |  |  |  |  |
Total Long-Term Investments |  |  |  | 102 |  | 87 | 102 |
PSE&G [Member] |  |  |  |  |  |  |  |
Long-Term Investments [Line Items] |  |  |  |  |  |  |  |
Total Long-Term Investments |  |  |  | 299 |  | 280 | 299 |
Life Insurance And Supplemental Benefits [Member] | PSE&G [Member] |  |  |  |  |  |  |  |
Long-Term Investments [Line Items] |  |  |  |  |  |  |  |
Total Long-Term Investments |  |  |  | 140 |  | 130 | 140 |
Solar Loan Investments [Member] | PSE&G [Member] |  |  |  |  |  |  |  |
Long-Term Investments [Line Items] |  |  |  |  |  |  |  |
Total Long-Term Investments |  |  |  | 159 |  | 150 | 159 |
Lease Investments [Member] | Energy Holdings [Member] |  |  |  |  |  |  |  |
Long-Term Investments [Line Items] |  |  |  |  |  |  |  |
Total Long-Term Investments |  |  |  | 649 |  | 565 | 649 |
Partnerships And Corporate Joint Ventures [Member] | Power [Member] |  |  |  |  |  |  |  |
Long-Term Investments [Line Items] |  |  |  |  |  |  |  |
Total Long-Term Investments | [1] |  |  | $ 102 |  | $ 87 | $ 102 |
[1] | During the three years ended December 31, 2017, 2016 and 2015, dividends from these investments were $18 million, $18 million and $16 million, respectively.

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- Definition Amount of direct write-downs of financing receivables charged against the allowance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition Amount of dividends or interest. Give totals for each group. If operations of any controlled companies are different in character from those of the company, group such affiliates (1) within divisions and (2) by type of activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(2)) -URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611322-123010 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(5)) -URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611322-123010 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(Column D)) -URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611322-123010 + Details
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