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Derivative And Credit-Related Financial Instruments (Schedule Of Financial Instruments With Off-Balance Sheet Credit Risk) (Details) - Maximum - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
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Unused Commitments to Extend Credit |  |
Loss contingency, estimate of possible loss, maximum | $ 34,817 | $ 29,464
Commercial And Other | Unused Commitments to Extend Credit |  |
Loss contingency, estimate of possible loss, maximum | 30,800 | 25,910
Bankcard, Revolving Check Credit And Home Equity Loan Commitments | Unused Commitments to Extend Credit |  |
Loss contingency, estimate of possible loss, maximum | 4,017 | 3,554
Standby Letters Of Credit |  |
Loss contingency, estimate of possible loss, maximum | 3,712 | 3,378
Commercial Letters Of Credit |  |
Loss contingency, estimate of possible loss, maximum | $ 39 | $ 44

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- Definition Reflects the estimated amount of loss from the specified contingency as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=124440162&loc=d3e12021-110248 + Details
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