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Financial Risk Management Activities - Schedule of Derivative Instruments Fair Value in Balance Sheets (Parenthetical) (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Derivatives, Fair Value [Line Items] |  |  |
Collateral already posted, aggregate fair value |  | $ 244 | $ 113
Derivative, fair value, amount offset against collateral, net | [1] | 121 | 22
Other Current Liabilities |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative, fair value, amount offset against collateral, net |  | 73 | 15
Other Current Assets |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative, fair value, amount offset against collateral, net |  |  | (1)
Other Noncurrent Liabilities |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative, fair value, amount offset against collateral, net |  | $ 48 | $ 8
[1] | Represents the netting of fair value balances with the same counterparty (where the right of offset exists) and the application of cash collateral. All cash collateral (received) posted that has been allocated to derivative positions, where the right of offset exists, has been offset on the Consolidated Balance Sheets. As of December 31, 2024 and 2023, PSEG Power had net cash collateral payments to counterparties of $244 million and $113 million, respectively. Of these net cash collateral (receipts) payments, $121 million as of December 31, 2024 and $22 million as of December 31, 2023 were netted against the corresponding net derivative contract positions. Of the $121 million as of December 31, 2024, $73 million was netted against current liabilities and $48 million was netted against noncurrent liabilities. Of the $22 million as of December 31, 2023, $(1) million was netted against current assets, $15 million against current liabilities and $8 million against noncurrent liabilities.

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- Definition The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4H + Details
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- Definition The net amount as of the balance sheet date of the fair value of derivative assets and derivative liabilities that in accordance with the entity's accounting policy were offset against collateral under a master netting arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-8 + 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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