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Valuation And Qualifying Accounts (Schedule Of Valuation And Qualifying Accounts) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Allowance For Doubtful Accounts [Member] |  |  |  |  |  |
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |  |  |  |
Balance at Beginning of Period |  | $ 206 | [1] | $ 60 |  | $ 63
Additions, Charged to cost and expenses | [2] | 195 |  | 175 |  | 87
Additions, Charged to other accounts-describe |  | 0 |  | 0 |  | 0
Deductions-describe | [3] | 64 |  | 37 |  | 90
Balance at End of Period |  | 337 |  | 206 | [1] | 60
Allowance For Doubtful Accounts [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance |  |  |  |  |  |
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |  |  |  |
Balance at Beginning of Period |  |  |  | 68 |  |
Balance at End of Period |  |  |  |  |  | 68
Materials And Supplies Valuation Reserve [Member] |  |  |  |  |  |
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |  |  |  |
Balance at Beginning of Period |  | 10 |  | 11 |  | 9
Additions, Charged to cost and expenses |  | 3 |  | 1 |  | 3
Additions, Charged to other accounts-describe |  | 0 |  | 0 |  | 0
Deductions-describe |  | 1 | [4] | 2 | [4] | 1
Balance at End of Period |  | 12 |  | 10 |  | 11
Public Service Electric and Gas Company | Allowance For Doubtful Accounts [Member] |  |  |  |  |  |
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |  |  |  |
Balance at Beginning of Period |  | 206 | [5] | 60 |  | 63
Additions, Charged to cost and expenses | [6] | 195 |  | 175 |  | 87
Additions, Charged to other accounts-describe |  | 0 |  | 0 |  | 0
Deductions-describe | [7] | 64 |  | 37 |  | 90
Balance at End of Period |  | 337 |  | 206 | [5] | 60
Public Service Electric and Gas Company | Allowance For Doubtful Accounts [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance |  |  |  |  |  |
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |  |  |  |
Balance at Beginning of Period |  |  |  | 68 |  |
Balance at End of Period |  |  |  |  |  | 68
Public Service Electric and Gas Company | Materials And Supplies Valuation Reserve [Member] |  |  |  |  |  |
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |  |  |  |
Balance at Beginning of Period |  | 2 |  | 2 |  | 2
Additions, Charged to cost and expenses |  | 2 |  | 0 |  | 0
Additions, Charged to other accounts-describe |  | 0 |  | 0 |  | 0
Deductions-describe |  | 1 |  | 0 |  | 0
Balance at End of Period |  | $ 3 |  | $ 2 |  | $ 2
[1] | Includes $8 million due to the adoption of ASU 2016-13.
[2] | For a discussion of bad debt recoveries, see Note 1. Organization, Basis of Presentation and Summary of Significant Accounting Policies.
[3] | Accounts Receivable written off.
[4] | Reduce reserve to appropriate level and to remove obsolete inventory.
[5] | Includes $8 million due to the adoption of ASU 2016-13.
[6] | For a discussion of bad debt recoveries, see Note 1. Organization, Basis of Presentation and Summary of Significant Accounting Policies.
[7] | Accounts Receivable written off.(C)Reduce reserve to appropriate level and to remove obsolete inventory.

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- Definition Amount of valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column B)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column E)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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