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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	Jun. 30, 2022	Dec. 31, 2021
Unused Commitments to Extend Credit
Loss contingency, estimate of possible loss	$ 31,460	$ 29,464
Commercial And Other | Unused Commitments to Extend Credit
Loss contingency, estimate of possible loss	27,686	25,910
Bankcard, Revolving Credit And Home Equity Loan Commitments | Unused Commitments to Extend Credit
Loss contingency, estimate of possible loss	3,774	3,554
Standby Letters Of Credit
Loss contingency, estimate of possible loss	3,494	3,378
Commercial Letters Of Credit
Loss contingency, estimate of possible loss	$ 55	$ 44

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

X

- Details

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X

- Details

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X

- Details

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X

- Details

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X

- Details

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X

- Details

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