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Long-Term Investments (Schedule Of Long Term Investments) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Long-Term Investments [Line Items] |  |  |
Total Long-Term Investments | $ 541 | $ 536 |
Dividends in equity method investments | 17 | 15 | $ 15
Provision for Loan and Lease Losses | 9 | 26 | $ 58
Public Service Electric and Gas Company |  |  |
Long-Term Investments [Line Items] |  |  |
Total Long-Term Investments | 181 | 222 |
Life Insurance And Supplemental Benefits [Member] | Public Service Electric and Gas Company |  |  |
Long-Term Investments [Line Items] |  |  |
Total Long-Term Investments | 89 | 100 |
Solar Loan Investment [Member] | Public Service Electric and Gas Company |  |  |
Long-Term Investments [Line Items] |  |  |
Total Long-Term Investments | 92 | 122 |
Partnerships And Corporate Joint Ventures [Member] |  |  |
Long-Term Investments [Line Items] |  |  |
Total Long-Term Investments | 173 | 64 |
Leases [Member] |  |  |
Long-Term Investments [Line Items] |  |  |
Total Long-Term Investments | $ 187 | $ 250 |

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- Definition Amount of dividends or interest. Give totals for each group. If operations of any controlled companies are different in character from those of the company, group such affiliates (1) within divisions and (2) by type of activities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(5)) -URI http://asc.fasb.org/extlink&oid=122147990&loc=d3e611322-123010 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(2)) -URI http://asc.fasb.org/extlink&oid=122147990&loc=d3e611322-123010 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(Column D)) -URI http://asc.fasb.org/extlink&oid=122147990&loc=d3e611322-123010 + Details
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- Definition The total amount of investments that are intended to be held for an extended period of time (longer than one operating cycle). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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