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Financial Information By Business Segments - Financial Information By Business Segments (Parenthetical) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2023 | Sep. 30, 2023 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Segment Reporting Information [Line Items] |  |  |  |  |
Pension lift out settlement charge, net of tax | $ 4 | $ 239 |  | $ 239 |
PSEG Power & Other [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Gain (loss) on sale, net of tax |  |  |  |  | $ 92
Operating Segments [Member] | PSEG Power & Other [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Non trading commodity mark to market gains (losses), net of tax |  |  | $ (151) | $ 959 | $ (457)

X
- Definition Gain (loss) on sale, net of tax + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition non trading commodity mark to market gains (losses), net of tax + References No definition available. + Details
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Namespace Prefix: | peg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Pension lift out settlement charge, net of tax. + References No definition available. + Details
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Namespace Prefix: | peg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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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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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |