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Commitments And Contingent Liabilities (Face Value Of Outstanding Guarantees, Current Exposure And Margin Positions) (Detail) - Power [Member] - USD ($) $ in Millions | Dec. 31, 2015 | Dec. 31, 2014
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Other Commitments [Line Items] |  |
Face Value of Outstanding Guarantees | $ 1,734 | $ 1,814
Exposure under Current Guarantees | 172 | 273
Letters of Credit Margin Posted | 122 | 159
Letters of Credit Margin Received | 192 | 40
Counterparty Cash Margin Deposited | 0 | 0
Counterparty Cash Margin Received | (15) | (13)
Net Broker Balance Deposited (Received) | (5) | 115
Additional Collateral that could be Required | 864 | 945
Liquidity Available under PSEG's and Power's Credit Facilities to Post Collateral | 3,215 | 3,495
Other Letters of Credit | 51 | $ 45
755 MW Gas-Fired Combined Cycle Generating Station [Member] |  |
Other Commitments [Line Items] |  |
Face Value of Outstanding Guarantees | 21 |
PennEast Natural Gas Pipeline [Member] |  |
Other Commitments [Line Items] |  |
Face Value of Outstanding Guarantees | $ 106 |

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- Definition Additional Amounts Posted Other Letters of Credit + References No definition available. + Details
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- Definition Additional Collateral that could be Required if Power Looses Investment Grade Rating + References No definition available. + Details
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- Definition Letters of Credit Margin Posted + References No definition available. + Details
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- Definition Letters of Credit Margin Received + References No definition available. + Details
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- Definition Liquidity Available under PSEG and Power Credit Facilities to Post Collateral + References No definition available. + Details
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- Definition Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 + Details
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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
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- Details
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- Details
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- Details
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