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Financial Information By Business Segments - Financial Information By Business Segments (Parenthetical) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
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Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Operating Segments [Member] | PSEG Power & Other [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Non trading commodity mark to market gains (losses), net of tax | $ 15 | $ 17 | $ 16 | $ (55)

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- Definition non trading commodity mark to market gains (losses), net of tax + References No definition available. + 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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- Details
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Namespace Prefix: |
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Period Type: |

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- Details
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Namespace Prefix: |
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Period Type: |