XML 157 R123.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Fair Value Measurements (Narrative) (Detail) - USD ($) $ in Millions | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Fair Value Disclosures [Abstract] |  |
Net Assets Measured At Fair Value On A Recurring Basis | $ 2,500 | $ 2,500
Net Assets Measured At Fair Value On A Recurring Basis Measured Using Unobservable Input And Classified As Level3 | $ 13 | $ 37

X
- Definition Net Assets Measured At Fair Value On A Recurring Basis + References No definition available. + Details
Name: | pseg_NetAssetsMeasuredAtFairValueOnRecurringBasis
Namespace Prefix: | pseg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Net Assets Measured At Fair Value On A Recurring Basis Measured Using Unobservable Input And Classified As Level3 + References No definition available. + Details
Name: | pseg_NetAssetsMeasuredAtFairValueOnRecurringBasisMeasuredUsingUnobservableInputAndClassifiedAsLevel3
Namespace Prefix: | pseg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_FairValueDisclosuresAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration