Organization, Basis of Presentation and Summary of Significant Accounting Policies - Amounts and Average Rates Used to Calculate IDC or AFUDC (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Public Service Electric and Gas Company [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
IDC/AFUDC	$ 62	$ 83	$ 84
Average Rate	6.43%	7.13%	7.39%
Other [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
IDC/AFUDC	$ 9	$ 9	$ 4
Average Rate	6.08%	5.66%	2.24%

Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]

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- Definition

Amount of interest capitalized, including amount of allowance for funds used during construction.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 980
-SubTopic 835
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479123/980-835-45-1

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- Definition

Effective rate, including composite rate, of cost of financing additions to qualifying regulated assets, commonly called allowance for funds used during construction.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 980
-SubTopic 835
-Section 25
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478698/980-835-25-1

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-Name Accounting Standards Codification
-Topic 980
-SubTopic 835
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479123/980-835-45-1

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