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Commitments And Contingent Liabilities (Litigation) (Detail) - USD ($) $ in Millions | Sep. 30, 2021 | Jan. 31, 2021
--- | --- | ---
LIPA complaint | Maximum [Member] |  |
Loss Contingencies [Line Items] |  |
Sewaren 7 Construction complaint amount | $ 70.0 |
LIPA complaint | Minimum [Member] |  |
Loss Contingencies [Line Items] |  |
Sewaren 7 Construction complaint amount | 7.0 |
PSEG Power [Member] | Sewaren 7 Litigation [Member] |  |
Loss Contingencies [Line Items] |  |
Original Claim Amount | $ 93.0 |
PSEG Power [Member] | Sewaren 7 Litigation [Member] | Maximum [Member] |  |
Loss Contingencies [Line Items] |  |
Sewaren 7 Construction complaint amount |  | $ 68.0

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- Definition Reflects the estimated amount of loss from the specified contingency as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121555522&loc=d3e12021-110248 + Details
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