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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
	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

X

- 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

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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.

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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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