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Financial Risk Management Activities - Schedule of Net Notional Volume for Open Derivative Contracts (Details) - PSEG Power [Member] | 9 Months Ended | 12 Months Ended
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Sep. 30, 2025 $ / MWh $ / $ $ / dth | Dec. 31, 2024 $ / dth $ / MWh $ / $
Natural Gas Dth [Member] |  |
Derivative [Line Items] |  |
Net notional volume of derivative transactions | $ / dth | 68 | 70
Electricity MWh [Member] |  |
Derivative [Line Items] |  |
Net notional volume of derivative transactions | (63) | (49)
FTRs MWh [Member] |  |
Derivative [Line Items] |  |
Net notional volume of derivative transactions | 23 | 16
Interest Rate Swaps [Member] |  |
Derivative [Line Items] |  |
Net notional volume of derivative transactions | $ / $ | 300 | 2,290

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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 Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 20 -Name Accounting Standards Codification -Section 25 -Paragraph 6A -Publisher FASB -URI https://asc.fasb.org/1943274/2147480682/815-20-25-6A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480237/815-40-50-5 + Details
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- Definition Specified interest rate, security price, commodity price, foreign exchange rate, index of prices or rates for a derivative contract but not the derivative contract itself. + References No definition available. + Details
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- Definition Specified interest rate, security price, commodity price, foreign exchange rate, index of prices or rates for a derivative contract measured in volume but not the derivative contract itself. + References No definition available. + Details
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