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Commitments and Contingent Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2017
Other Commitments [Line Items] |
Future Minimum Rental Payments | The total future minimum payments under various operating leases as of December 31, 2017 are:
|  |  | PSE&G |  | Power |  | Services |  | Other |  | Total |
|  |  | Millions |  |  |
| 2018 |  | $ | 16 |  |  | $ | 5 |  |  | $ | 14 |  |  | $ | 1 |  |  | $ | 36 |  |
| 2019 |  | 9 |  |  | 6 |  |  | 15 |  |  | 1 |  |  | 31 |  |
| 2020 |  | 8 |  |  | 3 |  |  | 15 |  |  | 1 |  |  | 27 |  |
| 2021 |  | 8 |  |  | 3 |  |  | 15 |  |  | 1 |  |  | 27 |  |
| 2022 |  | 7 |  |  | 3 |  |  | 15 |  |  | 1 |  |  | 26 |  |
| Thereafter |  | 65 |  |  | 38 |  |  | 120 |  |  | 1 |  |  | 224 |  |
| Total Minimum Lease Payments |  | $ | 113 |  |  | $ | 58 |  |  | $ | 194 |  |  | $ | 6 |  |  | $ | 371 |  |
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 |  |
|  | 2015 |  | 2016 |  | 2017 |  | 2018 |  |
| 36-Month Terms Ending | May 2018 |  |  | May 2019 |  |  | May 2020 |  |  | May 2021 |  | (A) |
| Load (MW) | 2,900 |  |  | 2,800 |  |  | 2,800 |  |  | 2,900 |  |  |
| $ per MWh | $99.54 |  | $96.38 |  | $90.78 |  | $91.77 |  |
(A) | Prices set in the 2018 BGS auction will become effective on June 1, 2018 when the 2015 BGS auction agreements expire.
Power [Member] |
Other Commitments [Line Items] |
Face Value Of Outstanding Guarantees, Current Exposure And Margin Positions | The following table shows the face value of Power’s outstanding guarantees, current exposure and margin positions as of December 31, 2017 and 2016.
|  |  | As of December 31, 2017 |  | As of December 31, 2016 |
|  |  | Millions |
| Face Value of Outstanding Guarantees |  | $ | 1,701 |  |  | $ | 1,806 |  |
| Exposure under Current Guarantees |  | $ | 153 |  |  | $ | 139 |  |
| Letters of Credit Margin Posted |  | $ | 103 |  |  | $ | 157 |  |
| Letters of Credit Margin Received |  | $ | 32 |  |  | $ | 99 |  |
| Cash Deposited and Received |  |  |  |  |
| Counterparty Cash Margin Deposited |  | $ | — |  |  | $ | — |  |
| Counterparty Cash Margin Received |  | $ | (1 | ) |  | $ | (1 | ) |
| Net Broker Balance Deposited (Received) |  | $ | 147 |  |  | $ | 57 |  |
| Additional Amounts Posted |  |  |  |  |
| Other Letters of Credit |  | $ | 61 |  |  | $ | 51 |  |
Total Minimum Purchase Commitments | As of December 31, 2017, the total minimum purchase requirements included in these commitments were as follows:
| Fuel Type |  | Power's Share of Commitments through 2022 |
|  |  | Millions |
| Nuclear Fuel |  |  |
| Uranium |  | $ | 240 |  |
| Enrichment |  | $ | 391 |  |
| Fabrication |  | $ | 170 |  |
| Natural Gas |  | $ | 1,042 |  |
| Coal |  | $ | 293 |  |

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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=77902758&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=82913245&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=82913245&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=77904769&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 + Details
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