XML 106 R84.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Fair Value Measurements (Changes In Level 3 Assets And (Liabilities) Measured At Fair Value On A Recurring Basis) (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Settlements |  |  |  | $ (3) |  |  | $ (28) |
Net Derivative Assets (Liabilities) [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Opening Balance |  | $ 4 |  | 6 | $ 7 |  | 1 |
Included in Income |  | (4) | [1] | 3 | 8 | [1] | (29) | [1]
Included in Regulatory Assets/Liabilities | [2] | 0 |  | 0 | 0 |  | 5 |
Purchases, (Sales) |  | 0 |  | 0 | 0 |  | 0 |
Issuances (Settlements) | [3] | (1) |  | (3) | 0 |  | (28) |
Transfers In (Out) | [4] | 0 |  | 0 | 0 |  | (1) |
Closing Balance |  | (1) |  | 6 | (1) |  | 6 |
Net Derivative Assets (Liabilities) [Member] | Power [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Opening Balance |  | 4 |  | 6 | 7 |  | 6 |
Included in Income |  | (4) | [1] | 3 | 8 | [1] | (29) | [1]
Included in Regulatory Assets/Liabilities | [2] | 0 |  | 0 | 0 |  | 0 |
Purchases, (Sales) |  | 0 |  | 0 | 0 |  | 0 |
Issuances (Settlements) | [3] | (1) |  | (3) | 0 |  | (28) |
Transfers In (Out) | [4] | 0 |  | 0 | 0 |  | (1) |
Closing Balance |  | (1) |  | 6 | (1) |  | 6 |
Net Derivative Assets (Liabilities) [Member] | PSE And G [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Opening Balance |  |  |  | 0 |  |  | (5) |
Included in Income |  |  |  | 0 |  |  | 0 | [1]
Included in Regulatory Assets/Liabilities | [2] |  |  | 0 |  |  | 5 |
Purchases, (Sales) |  |  |  | 0 |  |  | 0 |
Issuances (Settlements) | [3] |  |  | 0 |  |  | 0 |
Transfers In (Out) | [4] |  |  | 0 |  |  | 0 |
Closing Balance |  |  |  | 0 |  |  | 0 |
Operating Revenues [Member] | Power [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Gains and losses attributable to changes in net derivative assets and liabilities, included in Operating Income |  |  |  | 5 |  |  | 22 |
Gains and losses attributable to changes in net derivative assets and liabilities, unrealized |  | (8) |  |  | (7) |  | (2) |
Energy Costs [Member] | Power [Member] |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Gains and losses attributable to changes in net derivative assets and liabilities, included in Operating Income |  | 5 |  | $ (2) | (1) |  | 7 |
Gains and losses attributable to changes in net derivative assets and liabilities, unrealized |  | $ 4 |  |  | $ (1) |  | $ 3 |
[1] | PSEG’s and Power’s gains(losses) attributable to changes in net derivative assets and liabilities for the three months and nine months ended September 30, 2018 include $(8) million and $(7) million, respectively, in Operating Revenues and $4 million and $(1) million, respectively, in Energy Costs. Both the $(8) million and $(7) million in Operating Revenues are unrealized. Of the $4 million and $(1) million in Energy Costs, $5 million and $(1) million are unrealized. Unrealized gains (losses) represent the change in derivative assets and liabilities still held at the end of the reporting period.
[2] | Mainly includes gains/losses on PSE&G’s derivative contracts that are not included in either earnings or Accumulated Other Comprehensive Income, as they are deferred as a Regulatory Asset/Liability and are expected to be recovered from/returned to PSE&G’s customers.
[3] | Represents settlements of $(1) million for the three months ended September 30, 2018. Represents settlements of $(3) million and $(28) million for the three months and nine months ended September 30, 2017, respectively.
[4] | During the three months and nine months ended September 30, 2018, there were no transfers into or out of Level 3. During the nine months ended September 30, 2017, $(1) million of net derivatives were transferred from Level 2 to Level 3.

X
- Definition FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInTradingRevenue + References No definition available. + Details
Name: | pseg_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInTradingRevenue
Namespace Prefix: | pseg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs, Gain (Loss) Included In Regulatory Assets Liabilities + References No definition available. + Details
Name: | pseg_FairValueNetDerivativeAssetLiabilityMeasuredonRecurringBasiswithUnobservableInputsGainLossIncludedInRegulatoryAssetsLiabilities
Namespace Prefix: | pseg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs, Issuances (Settlements) + References No definition available. + Details
Name: | pseg_FairValueNetDerivativeAssetLiabilityMeasuredonRecurringBasiswithUnobservableInputsIssuancesSettlements
Namespace Prefix: | pseg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs, Purchases (Sales) + References No definition available. + Details
Name: | pseg_FairValueNetDerivativeAssetLiabilityMeasuredonRecurringBasiswithUnobservableInputsPurchasesSales
Namespace Prefix: | pseg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of unrealized (holding) gain (loss) which is included in the statement of income (or changes in net assets) related to those assets still held at the reporting date for which fair value is measured on a recurring basis using significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of settlement of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of gain (loss) recognized in the income statement of financial instrument classified as a derivative asset (liability) after deduction of derivative liability (asset), measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19279-110258 + Details
Name: | us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of transfers of financial instrument classified as a derivative asset (liability) after deduction of derivative liability (asset) into (out of) level 3 of the fair value hierarchy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19279-110258 + Details
Name: | us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Fair value of financial instrument classified as derivative asset (liability) after deduction of derivative liability (asset), measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19279-110258 + Details
Name: | us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=pseg_NetDerivativeAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=pseg_PowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=pseg_PseAndGMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=pseg_OperatingRevenuesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=pseg_EnergyCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |