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Debt and Credit Facilities - Fair Value of Debt (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Debt Instrument [Line Items] |  |  |
Long-term Debt, Carrying Value |  | $ 21,114 | $ 19,284
Long-term Debt, Fair Value |  | 19,341 | 17,950
Public Service Electric and Gas Company [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Long-term Debt, Carrying Value | [1] | 14,998 | 13,663
Long-term Debt, Fair Value | [1] | 13,337 | 12,460
PSEG Power |  |  |
Debt Instrument [Line Items] |  |  |
Long-term Debt, Carrying Value | [2] | 1,250 | 1,250
Long-term Debt, Fair Value | [2] | 1,250 | 1,250
PSEG [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Long-term Debt, Carrying Value | [1] | 4,866 | 4,371
Long-term Debt, Fair Value | [1] | $ 4,754 | $ 4,240
[1] | Given that these bonds do not trade actively, the fair value amounts of taxable debt securities (primarily Level 2 measurements) are generally determined by a valuation model using market-based measurements that are processed through a rules-based pricing methodology. The fair value amounts above do not represent the price at which the outstanding debt may be called for redemption by each issuer under their respective debt agreements.
[2] | Private term loan with book value approximating fair value (Level 2 measurement).

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