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v2.4.1.9

Income Taxes (Schedule Of Effective Tax Rates) (Detail) | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Effective tax rate | 40.50%us-gaap_EffectiveIncomeTaxRateContinuingOperations | 40.20%us-gaap_EffectiveIncomeTaxRateContinuingOperations
Power [Member] |  |
Effective tax rate | 41.10%us-gaap_EffectiveIncomeTaxRateContinuingOperations / dei_LegalEntityAxis = pseg_PowerMember | 40.40%us-gaap_EffectiveIncomeTaxRateContinuingOperations / dei_LegalEntityAxis = pseg_PowerMember
PSE And G [Member] |  |
Effective tax rate | 39.40%us-gaap_EffectiveIncomeTaxRateContinuingOperations / dei_LegalEntityAxis = pseg_PseAndGMember | 40.10%us-gaap_EffectiveIncomeTaxRateContinuingOperations / dei_LegalEntityAxis = pseg_PseAndGMember

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Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
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Period Type: | duration

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Name: | dei_LegalEntityAxis=pseg_PowerMember
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Data Type: | na
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Name: | dei_LegalEntityAxis=pseg_PseAndGMember
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Data Type: | na
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