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Commitments and Contingent Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2015
Other Commitments [Line Items] |
Future Minimum Rental Payments | The total future minimum payments under various operating leases as of December 31, 2015 are:
|  |  | PSE&G |  | Power |  | Services |  | Other |  | Total |
|  |  | Millions |  |  |
| 2016 |  | $ | 12 |  |  | $ | 2 |  |  | $ | 13 |  |  | $ | 2 |  |  | $ | 29 |  |
| 2017 |  | 9 |  |  | 2 |  |  | 13 |  |  | 1 |  |  | 25 |  |
| 2018 |  | 8 |  |  | 2 |  |  | 13 |  |  | 1 |  |  | 24 |  |
| 2019 |  | 7 |  |  | 2 |  |  | 13 |  |  | — |  |  | 22 |  |
| 2020 |  | 6 |  |  | 3 |  |  | 13 |  |  | — |  |  | 22 |  |
| Thereafter |  | 66 |  |  | 33 |  |  | 146 |  |  | — |  |  | 245 |  |
| Total Minimum Lease Payments |  | $ | 108 |  |  | $ | 44 |  |  | $ | 211 |  |  | $ | 4 |  |  | $ | 367 |  |
PSE&G [Member] |
Other Commitments [Line Items] |
Contract For Anticipated BGS-Fixed Price Eligible Load | The contract prices in dollars per MWh for the BGS-RSCP supply, as well as the approximate load, are as follows:
|  | Auction Year |  |
|  | 2013 |  | 2014 |  | 2015 |  | 2016 |  |
| 36-Month Terms Ending | May 2016 |  |  | May 2017 |  |  | May 2018 |  |  | May 2019 |  | (A) |
| Load (MW) | 2,800 |  |  | 2,800 |  |  | 2,900 |  |  | 2,800 |  |  |
| $ per MWh | $92.18 |  | $97.39 |  | $99.54 |  | $96.38 |  |
(A) | Prices set in the 2016 BGS auction will become effective on June 1, 2016 when the 2013 BGS auction agreements expire.
Power [Member] |
Other Commitments [Line Items] |
Face Value Of Outstanding Guarantees, Current Exposure And Margin Positions | The face value of outstanding guarantees, current exposure and margin positions as of December 31, 2015 and 2014 are shown below:
|  |  | As of December 31, 2015 |  | As of December 31, 2014 |
|  |  | Millions |
| Face Value of Outstanding Guarantees |  | $ | 1,734 |  |  | $ | 1,814 |  |
| Exposure under Current Guarantees |  | $ | 172 |  |  | $ | 273 |  |
| Letters of Credit Margin Posted |  | $ | 122 |  |  | $ | 159 |  |
| Letters of Credit Margin Received |  | $ | 192 |  |  | $ | 40 |  |
| Cash Deposited and Received |  |  |  |  |
| Counterparty Cash Margin Deposited |  | $ | — |  |  | $ | — |  |
| Counterparty Cash Margin Received |  | $ | (15 | ) |  | $ | (13 | ) |
| Net Broker Balance Deposited (Received) |  | $ | (5 | ) |  | $ | 115 |  |
| In the Event Power were to Lose its Investment Grade Rating |  |  |  |  |
| Additional Collateral that could be Required |  | $ | 864 |  |  | $ | 945 |  |
| Liquidity Available under PSEG’s and Power’s Credit Facilities to Post Collateral |  | $ | 3,215 |  |  | $ | 3,495 |  |
| Additional Amounts Posted |  |  |  |  |
| Other Letters of Credit |  | $ | 51 |  |  | $ | 45 |  |
Total Minimum Purchase Commitments | As of December 31, 2015, the total minimum purchase requirements included in these commitments were as follows:
| Fuel Type |  | Power's Share of Commitments through 2020 |
|  |  | Millions |
| Nuclear Fuel |  |  |
| Uranium |  | $ | 475 |  |
| Enrichment |  | $ | 394 |  |
| Fabrication |  | $ | 204 |  |
| Natural Gas |  | $ | 1,023 |  |
| Coal |  | $ | 300 |  |
Insurance coverages and maximum retrospective assessments for its nuclear operations | Power’s insurance coverages and maximum retrospective assessments for its nuclear operations are as follows:
| Type and Source of Coverages |  | Total Site Coverage |  |  |  | Retrospective Assessments |
|  |  | Millions |
| Public and Nuclear Worker Liability (Primary Layer): |  |  |  |  |  |  |
| ANI |  | $ | 375 |  |  | (A) |  | $ | — |  |
| Nuclear Liability (Excess Layer): |  |  |  |  |  |  |
| Price-Anderson Act |  | 13,113 |  |  | (B) |  | 401 |  |
| Nuclear Liability Total |  | $ | 13,488 |  |  | (C) |  | $ | 401 |  |
| Property Damage (Primary Layer): |  |  |  |  |  |  |
| NEIL Primary (Salem/Hope Creek and Peach Bottom) |  | $ | 1,500 |  |  |  |  | $ | 46 |  |
| Property Damage (Excess Layers) |  |  |  |  |  |  |
| NEIL Excess (Salem/Hope Creek and Peach Bottom) |  | 600 |  |  | (D) |  | 6 |  |
| Property Damage Total (Per Site) |  | $ | 2,100 |  |  |  |  | $ | 52 |  |
| Accidental Outage: |  |  |  |  |  |  |
| NEIL I (Peach Bottom) |  | $ | 245 |  |  | (E) |  | $ | 8 |  |
| NEIL I (Salem) |  | 281 |  |  | (E) |  | 9 |  |
| NEIL I (Hope Creek) |  | 490 |  |  | (E) |  | 7 |  |
| Replacement Power Total |  | $ | 1,016 |  |  |  |  | $ | 24 |  |
(A) | The primary limit for Public Liability is a per site aggregate limit with no potential for assessment. The Nuclear Worker Liability represents the potential liability from third party workers claiming exposure to the nuclear energy hazard. This coverage is subject to an industry aggregate limit that is subject to reinstatement at ANI discretion.
(B) | Retrospective premium program under the Price-Anderson Act liability provisions of the Atomic Energy Act of 1954, as amended. Power is subject to retrospective assessment with respect to loss from an incident at any licensed nuclear reactor in the United States that produces greater than 100 MW of electrical power. This retrospective assessment can be adjusted for inflation every five years. The last adjustment was effective as of September 10, 2013. The next adjustment is due on or before September 10, 2018. This retrospective program is in excess of the Public and Nuclear Worker Liability primary layers.
(C) | Limit of liability under the Price-Anderson Act for each nuclear incident.
(D) | For nuclear event property limits in excess of $1.5 billion, Power participates in a $600 million nuclear event Blanket Limit Policy. The blanket limit policy is shared with Exelon Generation and covers the following facilities: Braidwood, Byron, Clinton, Dresden, La Salle, Limerick, Oyster Creek, Quad Cities, TMI-1 Peach Bottom, Salem and Hope Creek. This limit is not subject to reinstatement in the event of a loss. Participation in this program reduces Power’s premium and the associated potential assessment. In addition, for non-nuclear event limits in excess of $1.5 billion, Power maintains a $600 million limit shared by the Salem and Hope Creek facilities. Exelon maintains a $600 million non-nuclear event limit shared by Peach Bottom, Braidwood, Byron, Clinton, Dresden, LaSalle, Limerick, Oyster Creek, Quad Cities, and the TMI-1 facilities.
(E) | Peach Bottom 2 and 3 have an aggregate indemnity limit based on a weekly indemnity of $2.3 million for 52 weeks followed by 80% of the weekly indemnity for 68 weeks. Salem 1 and 2 have an aggregate indemnity limit based on a weekly indemnity of $2.5 million for 52 weeks followed by 80% of the weekly indemnity for 76 weeks. Hope Creek has an aggregate indemnity limit based on a weekly indemnity of $4.5 million for 52 weeks followed by 80% of the weekly indemnity for 71 weeks.

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- Definition Tabular disclosure of key provisions of an arrangement under which the entity has agreed to purchase goods or services over a period of time greater than one year or the normal operating cycle, if longer, including the item for which expenditures will be made, minimum quantities, milestones, time period and committed amount. + References No definition available. + Details
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- Definition Tabular disclosure of future minimum payments required in the aggregate and for each of the five succeeding fiscal years for operating leases having initial or remaining noncancelable lease terms in excess of one year and the total minimum rentals to be received in the future under noncancelable subleases as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 + Details
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- Definition Tabular disclosure of each guarantee obligation, or each group of similar guarantee obligations, including (a) the nature of the guarantee, including its term, how it arose, and the events or circumstances that would require the guarantor to perform under the guarantee; (b) the maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee; (c) the current carrying amount of the liability, if any, for the guarantor's obligations under the guarantee; and (d) the nature of any recourse provisions under the guarantee, and any assets held either as collateral or by third parties, and any relevant related party disclosure. Excludes disclosures about product warranties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12265-110248 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 + Details
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- Definition Tabular disclosure of information concerning the terms and significance of long term contracts to purchase power (generally referred to as purchase power agreements (PPAs) or power sale agreements (PSAs)) including date of contract expiration, share of plant output being purchased, estimated annual cost, annual minimum debt service payment required and amount of related long-term debt or lease obligations outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 25 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6394851&loc=SL2265659-115463 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 10.D) -URI http://asc.fasb.org/extlink&oid=6499423&loc=d3e659339-123030 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 10 -Section D + Details
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