XML 98 R75.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Financial Risk Management Activities (Schedule Providing Credit Risk From Others, Net Of Collateral) (Detail) - Power [Member] $ in Millions | Sep. 30, 2017 USD ($) Counterparty
--- | ---
Derivative [Line Items] |  |
Current Exposure | $ 323 |
Securities held as Collateral | 56 |
Net exposure | 267 |
Number of Counterparties greater than 10% | 2 |
Amount Of Net Credit Exposure Greater Than Ten Percent | $ 97 |
Number Of Active Counterparties On Credit Risk Derivatives | Counterparty | 144 |
Investment Grade [Member] |  |
Derivative [Line Items] |  |
Current Exposure | $ 318 |
Securities held as Collateral | 55 |
Net exposure | 263 |
Number of Counterparties greater than 10% | 2 |
Amount Of Net Credit Exposure Greater Than Ten Percent | 128 | [1]
Non-Investment Grade [Member] |  |
Derivative [Line Items] |  |
Current Exposure | 5 |
Securities held as Collateral | 1 |
Net exposure | 4 |
Number of Counterparties greater than 10% | 0 |
Amount Of Net Credit Exposure Greater Than Ten Percent | 0 |
Cash [Member] |  |
Derivative [Line Items] |  |
Securities held as Collateral | 3 |
Letter of Credit [Member] |  |
Derivative [Line Items] |  |
Securities held as Collateral | $ 53 |
[1] | net exposure of $97 million with PSE&G.

X
- Definition Amount of net credit exposure greater than ten percent + References No definition available. + Details
Name: | pseg_AmountOfNetCreditExposureGreaterThanTenPercent
Namespace Prefix: | pseg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Net credit exposure with counterparties after applying collateral + References No definition available. + Details
Name: | pseg_NetCreditExposureWithCounterpartiesAfterApplyingCollateral
Namespace Prefix: | pseg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number of active counterparties on credit risk derivatives + References No definition available. + Details
Name: | pseg_NumberOfActiveCounterpartiesOnCreditRiskDerivatives
Namespace Prefix: | pseg_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of counterparties with greater than ten percent of net credit exposure + References No definition available. + Details
Name: | pseg_NumberOfCounterpartiesWithGreaterThanTenPercentOfNetCreditExposure
Namespace Prefix: | pseg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Total credit exposure with counterparties + References No definition available. + Details
Name: | pseg_TotalCreditExposureWithCounterparties
Namespace Prefix: | pseg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The carrying amount (fair value) as of the balance sheet date of securities held that had been pledged by counterparties under financing and lending arrangements, pursuant to which the entity has the right by agreement or custom to sell or re-pledge such securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5086-111524 + Details
Name: | us-gaap_SecuritiesHeldAsCollateralAtFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ExternalCreditRatingInvestmentGradeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=pseg_NonInvestmentGradeExternalRatingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CollateralAxis=us-gaap_CashMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CollateralAxis=us-gaap_LetterOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |