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Fair Value Measurements (Schedule Of Carrying Amounts And Estimated Fair Values Of Financial Instruments) (Details) - USD ($) | Jun. 30, 2022 | Dec. 31, 2021
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Financial Assets [Abstract] |  |
Debt securities held to maturity, estimated fair value | $ 817,000,000 | $ 950,000,000
Debt securities available for sale | 29,052,000,000 | 28,481,000,000
Loans held for sale, at fair value | 369,000,000 | 783,000,000
Other earning assets | 1,428,000,000 | 1,187,000,000
Derivative Asset, Fair Value, Gross Asset | 1,889,000,000 | 1,111,000,000
Financial Liabilities [Abstract] |  |
Derivative Liabilities, Fair Value, Gross Liability | 2,426,000,000 | 1,012,000,000
Fair Value Premium on Loan Portfolio, Amount |  | $ 220,000,000
Fair Value Premium on Loan Portfolio, Rate |  | 0.30%
Capital leases, carrying amount excluded | 1,500,000,000 | $ 1,400,000,000
Operating leases, carrying amount excluded |  | 83,000,000
Fair value of loans, discount, amount | $ 3,600,000,000 |
Fair Value Discount on Loan Portfolio, Rate | 4.00% |
Estimate of Fair Value [Member] |  |
Financial Assets [Abstract] |  |
Cash and cash equivalents | $ 20,500,000,000 | 29,411,000,000
Debt securities held to maturity, estimated fair value | 817,000,000 | 950,000,000
Debt securities available for sale | 29,052,000,000 | 28,481,000,000
Loans held for sale, at fair value | 612,000,000 | 1,003,000,000
Loans (excluding leases), net of unearned income and allowance for loan losses | 86,989,000,000 | 85,086,000,000
Other earning assets | 1,428,000,000 | 1,104,000,000
Derivative Asset, Fair Value, Gross Asset | 1,889,000,000 | 1,111,000,000
Financial Liabilities [Abstract] |  |
Derivative Liabilities, Fair Value, Gross Liability | 2,426,000,000 | 1,012,000,000
Deposits | 138,213,000,000 | 139,101,000,000
Long-term borrowings | 2,462,000,000 | 2,847,000,000
Loan commitments and letters of credit | 119,000,000 | 123,000,000
Carrying Amount [Member] |  |
Financial Assets [Abstract] |  |
Cash and cash equivalents | 20,500,000,000 | 29,411,000,000
Debt securities held to maturity, estimated fair value | 836,000,000 | 899,000,000
Debt securities available for sale | 29,052,000,000 | 28,481,000,000
Loans held for sale, at fair value | 612,000,000 | 1,003,000,000
Loans (excluding leases), net of unearned income and allowance for loan losses | 90,576,000,000 | 84,866,000,000
Other earning assets | 1,428,000,000 | 1,104,000,000
Derivative Asset, Fair Value, Gross Asset | 1,889,000,000 | 1,111,000,000
Financial Liabilities [Abstract] |  |
Derivative Liabilities, Fair Value, Gross Liability | 2,426,000,000 | 1,012,000,000
Deposits | 138,263,000,000 | 139,072,000,000
Long-term borrowings | 2,319,000,000 | 2,407,000,000
Loan commitments and letters of credit | 119,000,000 | 123,000,000
Level 1 [Member] |  |
Financial Assets [Abstract] |  |
Cash and cash equivalents | 20,500,000,000 | 29,411,000,000
Debt securities held to maturity, estimated fair value | 0 | 0
Debt securities available for sale | 1,252,000,000 | 1,132,000,000
Loans held for sale, at fair value | 0 | 0
Loans (excluding leases), net of unearned income and allowance for loan losses | 0 | 0
Other earning assets | 583,000,000 | 464,000,000
Derivative Asset, Fair Value, Gross Asset | 0 | 0
Financial Liabilities [Abstract] |  |
Derivative Liabilities, Fair Value, Gross Liability | 0 | 0
Deposits | 0 | 0
Long-term borrowings | 0 | 0
Loan commitments and letters of credit | 0 | 0
Level 2 [Member] |  |
Financial Assets [Abstract] |  |
Cash and cash equivalents | 0 | 0
Debt securities held to maturity, estimated fair value | 817,000,000 | 950,000,000
Debt securities available for sale | 27,798,000,000 | 27,347,000,000
Loans held for sale, at fair value | 552,000,000 | 899,000,000
Loans (excluding leases), net of unearned income and allowance for loan losses | 0 | 0
Other earning assets | 845,000,000 | 640,000,000
Derivative Asset, Fair Value, Gross Asset | 1,879,000,000 | 1,098,000,000
Financial Liabilities [Abstract] |  |
Derivative Liabilities, Fair Value, Gross Liability | 2,422,000,000 | 1,009,000,000
Deposits | 138,213,000,000 | 139,101,000,000
Long-term borrowings | 2,460,000,000 | 2,845,000,000
Loan commitments and letters of credit | 0 | 0
Level 3 [Member] |  |
Financial Assets [Abstract] |  |
Cash and cash equivalents | 0 | 0
Debt securities held to maturity, estimated fair value | 0 | 0
Debt securities available for sale | 2,000,000 | 2,000,000
Loans held for sale, at fair value | 60,000,000 | 104,000,000
Loans (excluding leases), net of unearned income and allowance for loan losses | 86,989,000,000 | 85,086,000,000
Other earning assets | 0 | 0
Derivative Asset, Fair Value, Gross Asset | 10,000,000 | 13,000,000
Financial Liabilities [Abstract] |  |
Derivative Liabilities, Fair Value, Gross Liability | 4,000,000 | 3,000,000
Deposits | 0 | 0
Long-term borrowings | 2,000,000 | 2,000,000
Loan commitments and letters of credit | $ 119,000,000 | $ 123,000,000

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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=124260329&loc=d3e26610-111562 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 + Details
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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
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- Definition Fair value portion of deposit liabilities held by the entity, including, but not limited to, foreign and domestic, interest and noninterest bearing, demand deposits, saving deposits, negotiable orders of withdrawal (NOW) and time deposits. + References No definition available. + Details
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- Definition Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 22 -URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226052-175313 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226000-175313 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4D -Subparagraph (c)(2) -URI https://asc.fasb.org/extlink&oid=121570589&loc=SL51823488-111719 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5624163-113959 + Details
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- Definition Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4D -Subparagraph (c)(2) -URI https://asc.fasb.org/extlink&oid=121570589&loc=SL51823488-111719 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5624163-113959 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226000-175313 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 22 -URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226052-175313 + Details
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- Definition Fair value of investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27232-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5A -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126970911&loc=SL120269820-111563 + Details
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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
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