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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 | Mar. 31, 2023 | Dec. 31, 2022
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Unused Commitments to Extend Credit |  |
Loss contingency, estimate of possible loss | $ 34,977 | $ 34,817
Commercial and other | Unused Commitments to Extend Credit |  |
Loss contingency, estimate of possible loss | 30,918 | 30,800
Bankcard, revolving credit and home equity loan commitments | Unused Commitments to Extend Credit |  |
Loss contingency, estimate of possible loss | 4,059 | 4,017
Standby letters of credit |  |
Loss contingency, estimate of possible loss | 3,525 | 3,712
Commercial letters of credit |  |
Loss contingency, estimate of possible loss | $ 52 | $ 39

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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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