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v2.4.1.9

Variable Interest Entities (VIEs) (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Dec. 31, 2014
Operating Revenues | $ 3,135 us-gaap_Revenues | $ 3,223 us-gaap_Revenues |
Operation and Maintenance | 663 us-gaap_UtilitiesOperatingExpenseMaintenanceAndOperations | 856 us-gaap_UtilitiesOperatingExpenseMaintenanceAndOperations |
PSE And G [Member] |  |  |
Maximum exposure to loss | 16 us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount / dei_LegalEntityAxis = pseg_PseAndGMember |  | 16 us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount / dei_LegalEntityAxis = pseg_PseAndGMember
Operating Revenues | 2,002 us-gaap_Revenues / dei_LegalEntityAxis = pseg_PseAndGMember | 2,145 us-gaap_Revenues / dei_LegalEntityAxis = pseg_PseAndGMember |
Operation and Maintenance | 412 us-gaap_UtilitiesOperatingExpenseMaintenanceAndOperations / dei_LegalEntityAxis = pseg_PseAndGMember | 462 us-gaap_UtilitiesOperatingExpenseMaintenanceAndOperations / dei_LegalEntityAxis = pseg_PseAndGMember |
Long Island ServCo [Member] |  |  |
Operating Revenues | 82 us-gaap_Revenues / dei_LegalEntityAxis = pseg_LongIslandServCoMember | 89 us-gaap_Revenues / dei_LegalEntityAxis = pseg_LongIslandServCoMember |
Operation and Maintenance | $ 82 us-gaap_UtilitiesOperatingExpenseMaintenanceAndOperations / dei_LegalEntityAxis = pseg_LongIslandServCoMember | $ 89 us-gaap_UtilitiesOperatingExpenseMaintenanceAndOperations / dei_LegalEntityAxis = pseg_LongIslandServCoMember |

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