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v2.4.1.9

Changes In Capitalization (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Dec. 31, 2014
Long-term Debt | $ 9,084 us-gaap_LongTermDebt |  | $ 9,144 us-gaap_LongTermDebt
PSE And G [Member] |  |  |
Contributed Capital | 0 us-gaap_ProceedsFromContributedCapital / dei_LegalEntityAxis = pseg_PseAndGMember | 175 us-gaap_ProceedsFromContributedCapital / dei_LegalEntityAxis = pseg_PseAndGMember |
Power [Member] |  |  |
Cash Dividends Paid to Parent Company | 200 us-gaap_CashDividendsPaidToParentCompany / dei_LegalEntityAxis = pseg_PowerMember |  |
Securitization Debt [Member] | PSE And G [Member] |  |  |
Repayments of Long-term Debt | $ 58 us-gaap_RepaymentsOfLongTermDebt / us-gaap_DebtInstrumentAxis = pseg_TransitionFundingsSecuritizationDebtMember / dei_LegalEntityAxis = pseg_PseAndGMember |  |

X
- Definition No authoritative reference available. + References No definition available. + Details
Name: | us-gaap_CashDividendsPaidToParentCompany
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition No authoritative reference available. + References No definition available. + Details
Name: | us-gaap_LongTermDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition No authoritative reference available. + References No definition available. + Details
Name: | us-gaap_ProceedsFromContributedCapital
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition No authoritative reference available. + References No definition available. + Details
Name: | us-gaap_RepaymentsOfLongTermDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

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

X
- Details
Name: | us-gaap_DebtInstrumentAxis=pseg_TransitionFundingsSecuritizationDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |