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Pension, Other Postretirement Benefits (OPEB) and Savings Plans - Fair Value Measurements and Levels of Inputs Used In Determining Fair Values (Parenthetical) (Details) - Pension Plan [Member] - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Net receivables excluded from Fair Value	$ 6	$ 2
Cash and foreign currency excluded from Fair Value	$ 1

X

- Definition

Cash and foreign currency excluded from Fair Value

+ References

No definition available.

+ Details

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Namespace Prefix:	peg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Net receivables excluded from Fair Value

+ References

No definition available.

+ Details

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Namespace Prefix:	peg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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

No definition available.

+ Details

Name:	us-gaap_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: