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Debt and Credit Facilities Debt and Credit Facilities (Tables) | 6 Months Ended
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Jun. 30, 2016
Debt and Credit Facilities [Abstract] |
Schedule of Line of Credit Facilities [Table Text Block] | Each of PSEG's credit facilities is restricted as to availability and use to the specific companies as listed in the following table; however, if necessary, the PSEG facilities can also be used to support its subsidiaries' liquidity needs. PSEG's total credit facilities and available liquidity as of June 30, 2016 were as follows:
|  |  | As of June 30, 2016 |  |  |  |  |
| Company/Facility |  | Total Facility |  | Usage (D) |  | Available Liquidity |  | Expiration Date |  | Primary Purpose |
|  |  | Millions |  |  |  |  |
| PSEG |  |  |  |  |  |  |  |  |  |  |
| 5-year Credit Facility |  | $ | 500 |  |  | $ | 10 |  |  | $ | 490 |  |  | Apr 2019 |  | Commercial Paper (CP) Support/Funding/Letters of Credit |
| 5-year Credit Facility (A) |  | 500 |  |  | — |  |  | 500 |  |  | Apr 2020 |  | CP Support/Funding/Letters of Credit |
| Total PSEG |  | $ | 1,000 |  |  | $ | 10 |  |  | $ | 990 |  |  |  |  |  |
| PSE&G |  |  |  |  |  |  |  |  |  |  |
| 5-year Credit Facility (B) |  | $ | 600 |  |  | $ | 14 |  |  | $ | 586 |  |  | Apr 2020 |  | CP Support/Funding/Letters of Credit |
| Total PSE&G |  | $ | 600 |  |  | $ | 14 |  |  | $ | 586 |  |  |  |  |  |
| Power |  |  |  |  |  |  |  |  |  |  |
| 5-year Credit Facility |  | $ | 1,600 |  |  | $ | 189 |  |  | $ | 1,411 |  |  | Apr 2019 |  | Funding/Letters of Credit |
| 5-year Credit Facility (C) |  | 953 |  |  | 13 |  |  | 940 |  |  | Apr 2020 |  | Funding/Letters of Credit |
| Total Power |  | $ | 2,553 |  |  | $ | 202 |  |  | $ | 2,351 |  |  |  |  |  |
| Total |  | $ | 4,153 |  |  | $ | 226 |  |  | $ | 3,927 |  |  |  |  |  |
(A) | PSEG facility will be reduced by $12 million in March 2018.
(B) | PSE&G facility will be reduced by $14 million in March 2018.
(C)Power facility will be reduced by $24 million in March 2018.
(D) | The primary use of PSEG's and PSE&G's credit facilities is to support their respective CP Programs. PSEG and PSE&G had no amounts outstanding under their respective CP Programs as of June 30, 2016.

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- Definition Debt and Credit Facilities [Abstract] + References No definition available. + Details
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- Definition Tabular disclosure of short-term or long-term contractual arrangements with lenders, including letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(e),(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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