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Goodwill And Other Intangibles (Expenses Related To Emissions And Renewable Energy Requirements) (Details) - Power [Member] - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Goodwill [Line Items] |  |  |
Emissions Expense | $ 14 | $ 13 | $ 10
Renewable Energy Expense | $ 95 | $ 91 | $ 59

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- Definition Emissions expense. + References No definition available. + Details
Name: | pseg_EmissionsExpense
Namespace Prefix: | pseg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Renewable energy expense. + References No definition available. + Details
Name: | pseg_RenewableEnergyExpense
Namespace Prefix: | pseg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

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