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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
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

X

- 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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Balance Type:	debit
Period Type:	instant

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- Details

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X

- Details

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- Details

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- Details

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X

- Details

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X

- Details

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