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Valuation And Qualifying Accounts (Schedule Of Valuation And Qualifying Accounts) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Allowance For Doubtful Accounts [Member] |  |  |  |  |  |  |
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |  |  |  |  |
Balance at Beginning of Period |  | $ 59 |  | $ 68 |  | $ 67 |
Additions, Charged to cost and expenses |  | 91 |  | 76 |  | 85 |
Additions, Charged to other accounts-describe |  | 0 |  | 0 |  | 0 |
Deductions-describe | [1] | 87 |  | 85 |  | 84 |
Balance at End of Period |  | 63 |  | 59 |  | 68 |
Materials And Supplies Valuation Reserve [Member] |  |  |  |  |  |  |
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |  |  |  |  |
Balance at Beginning of Period |  | 7 |  | 37 |  | 11 |
Additions, Charged to cost and expenses |  | 4 |  | 2 |  | 32 |
Additions, Charged to other accounts-describe |  | 0 |  | 0 |  | 0 |
Deductions-describe |  | 2 | [2] | 32 | [3] | 6 | [2]
Balance at End of Period |  | 9 |  | 7 |  | 37 |
PSE&G [Member] | Allowance For Doubtful Accounts [Member] |  |  |  |  |  |  |
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |  |  |  |  |
Balance at Beginning of Period |  | 59 |  | 68 |  | 67 |
Additions, Charged to cost and expenses |  | 91 |  | 76 |  | 85 |
Additions, Charged to other accounts-describe |  | 0 |  | 0 |  | 0 |
Deductions-describe | [4] | 87 |  | 85 |  | 84 |
Balance at End of Period |  | 63 |  | 59 |  | 68 |
PSE&G [Member] | Materials And Supplies Valuation Reserve [Member] |  |  |  |  |  |  |
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |  |  |  |  |
Balance at Beginning of Period |  | 0 |  | 0 |  | 1 |
Additions, Charged to cost and expenses |  | 2 |  | 0 |  | 0 |
Additions, Charged to other accounts-describe |  | 0 |  | 0 |  | 0 |
Deductions-describe |  | 0 |  | 0 |  | 1 | [5]
Balance at End of Period |  | 2 |  | 0 |  | 0 |
Power [Member] | Materials And Supplies Valuation Reserve [Member] |  |  |  |  |  |  |
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |  |  |  |  |
Balance at Beginning of Period |  | 7 |  | 37 |  | 10 |
Additions, Charged to cost and expenses |  | 2 |  | 2 |  | 32 |
Additions, Charged to other accounts-describe |  | 0 |  | 0 |  | 0 |
Deductions-describe |  | 2 | [6] | 32 | [7] | 5 | [6]
Balance at End of Period |  | $ 7 |  | $ 7 |  | $ 37 |
[1] | Accounts Receivable written off.
[2] | Reduce reserve to appropriate level and to remove obsolete inventory.
[3] | Hudson and Mercer inventory written off.
[4] | Accounts Receivable written off.
[5] | Reduce reserve to appropriate level and to remove obsolete inventory.
[6] | Reduce reserve to appropriate level and to remove obsolete inventory.
[7] | Hudson and Mercer inventory written off.

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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) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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- Definition Amount of increase in valuation and qualifying accounts and reserves from charge to cost and expense. + 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) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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- Definition Amount of increase in valuation and qualifying accounts and reserves from charge to accounts other than cost and expense. + 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) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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- Definition Amount of decrease in 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) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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