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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
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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%

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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 + Details
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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 Reference 2: 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 + Details
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