Average Historical Basis

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- Definition

Fair value, measurement with significant unobservable inputs

+ References

No definition available.

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- Definition

Historic Load Variability

+ References

No definition available.

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- Definition

Valuation Technique used

+ References

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- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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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.

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- Definition

Fair value of financial and nonfinancial obligations.

+ References

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Fair Value Measurements (Schedule Of Quantitative Information About Level 3 Fair Value Measurements) (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Mar. 31, 2021	Jun. 30, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value		$ 0	$ 12
Liabilities, Fair Value		(8)	(5)
PSEG Power [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value		0	12
Liabilities, Fair Value		(8)	(5)
Electric Load Contracts [Member] \| PSEG Power [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value		0	12
Liabilities, Fair Value		$ (6)	0
Valuation Technique used	Discounted Cash Flow	Discounted Cash Flow
Significant Unobservable Inputs	Load Shaping Cost	Load Shaping Cost
Historic Load Variability	4.00%	5.00%
Electric Load Contracts [Member] \| Minimum [Member] \| PSEG Power [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Historic Load Variability	0.00%	0.00%
Electric Load Contracts [Member] \| Maximum [Member] \| PSEG Power [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Historic Load Variability	11.00%	11.00%
Gas Physical Contract [Member] \| PSEG Power [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value			0
Liabilities, Fair Value			(2)
Valuation Technique used	Discounted Cash Flow
Significant Unobservable Inputs	Historical Basis Adjustment
Average Historical Basis	(43.00%)
Gas Physical Contract [Member] \| Minimum [Member] \| PSEG Power [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Average Historical Basis	(60.00%)
Gas Physical Contract [Member] \| Maximum [Member] \| PSEG Power [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Average Historical Basis	(30.00%)
Other (Futures Contracts) \| PSEG Power [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value		$ 0	0
Liabilities, Fair Value		$ (2)	$ (3)