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Fair Value Measurements (Schedule Of Carrying Amounts And Estimated Fair Values Of Financial Instruments) (Details) - USD ($) | Jun. 30, 2021 | Dec. 31, 2020
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Financial Assets [Abstract] |  |  |  |  |
Debt securities held to maturity |  | $ 1,064,000,000 |  | $ 1,215,000,000 |
Debt securities available for sale |  | 29,290,000,000 |  | 27,154,000,000 |
Loans held for sale |  | 991,000,000 |  | 1,446,000,000 |
Other earning assets |  | 1,246,000,000 |  | 1,217,000,000 |
Derivative Assets | [1] | 704,000,000 |  | 921,000,000 |
Financial Liabilities [Abstract] |  |  |  |  |
Derivative Liabilities | [1] | 52,000,000 |  | 53,000,000 |
Capital leases, carrying amount excluded |  | 1,400,000,000 |  | 1,500,000,000 |
Operating leases, carrying amount excluded |  | 163,000,000 |  | 200,000,000 |
Fair Value Premium on Loan Portfolio, Amount |  | $ 652,000,000 |  | $ 1,200,000,000 |
Fair Value Premium on Loan Portfolio, Rate |  | 0.80% |  | 1.40% |
Recurring Fair Value Measurements [Member] |  |  |  |  |
Financial Assets [Abstract] |  |  |  |  |
Debt securities available for sale |  | $ 29,290,000,000 |  | $ 27,154,000,000 |
Loans held for sale |  | 991,000,000 |  | 1,446,000,000 |
Derivative Assets |  | 2,061,000,000 |  | 3,349,000,000 |
Other Assets, Fair Value Disclosure |  | 0 |  | 74,000,000 |
Financial Liabilities [Abstract] |  |  |  |  |
Derivative Liabilities |  | 1,254,000,000 |  | 1,598,000,000 |
Estimate of Fair Value [Member] |  |  |  |  |
Financial Assets [Abstract] |  |  |  |  |
Cash and cash equivalents | [2] | 25,594,000,000 |  | 17,956,000,000 |
Debt securities held to maturity | [2] | 1,064,000,000 |  | 1,215,000,000 |
Debt securities available for sale | [2] | 29,290,000,000 |  | 27,154,000,000 |
Loans held for sale | [2] | 1,194,000,000 |  | 1,905,000,000 |
Loans (excluding leases), net of unearned income and allowance for loan losses | [2],[3],[4] | 81,715,000,000 |  | 82,773,000,000 |
Other earning assets |  | 1,083,000,000 | [2],[5] | 1,017,000,000 | [6],[7]
Derivative Assets | [2] | 2,061,000,000 |  | 3,349,000,000 |
Other Assets, Fair Value Disclosure |  |  |  | 74,000,000 |
Financial Liabilities [Abstract] |  |  |  |  |
Derivative Liabilities | [2] | 1,254,000,000 |  | 1,598,000,000 |
Deposits | [2] | 131,500,000,000 |  | 122,511,000,000 |
Long-term borrowings | [2] | 3,363,000,000 |  | 4,063,000,000 |
Loan commitments and letters of credit | [2] | 118,000,000 |  | 151,000,000 |
Carrying Amount [Member] |  |  |  |  |
Financial Assets [Abstract] |  |  |  |  |
Cash and cash equivalents |  | 25,594,000,000 |  | 17,956,000,000 |
Debt securities held to maturity |  | 993,000,000 |  | 1,122,000,000 |
Debt securities available for sale |  | 29,290,000,000 |  | 27,154,000,000 |
Loans held for sale |  | 1,194,000,000 |  | 1,905,000,000 |
Loans (excluding leases), net of unearned income and allowance for loan losses |  | 81,063,000,000 | [3],[4] | 81,597,000,000 | [8],[9]
Other earning assets |  | 1,083,000,000 | [5] | 1,017,000,000 | [7]
Derivative Assets |  | 2,061,000,000 |  | 3,349,000,000 |
Other Assets, Fair Value Disclosure |  |  |  | 74,000,000 |
Financial Liabilities [Abstract] |  |  |  |  |
Derivative Liabilities |  | 1,254,000,000 |  | 1,598,000,000 |
Deposits |  | 131,484,000,000 |  | 122,479,000,000 |
Long-term borrowings |  | 2,870,000,000 |  | 3,569,000,000 |
Loan commitments and letters of credit |  | 118,000,000 |  | 151,000,000 |
Level 1 [Member] |  |  |  |  |
Financial Assets [Abstract] |  |  |  |  |
Cash and cash equivalents |  | 25,594,000,000 |  | 17,956,000,000 |
Debt securities held to maturity |  | 0 |  | 0 |
Debt securities available for sale |  | 737,000,000 |  | 183,000,000 |
Loans held for sale |  | 0 |  | 0 |
Loans (excluding leases), net of unearned income and allowance for loan losses |  | 0 | [3],[4] | 0 | [8],[9]
Other earning assets |  | 447,000,000 | [5] | 388,000,000 | [7]
Derivative Assets |  | 1,000,000 |  | 2,000,000 |
Other Assets, Fair Value Disclosure |  |  |  | 0 |
Financial Liabilities [Abstract] |  |  |  |  |
Derivative Liabilities |  | 1,000,000 |  | 2,000,000 |
Deposits |  | 0 |  | 0 |
Long-term borrowings |  | 0 |  | 0 |
Loan commitments and letters of credit |  | 0 |  | 0 |
Level 1 [Member] | Recurring Fair Value Measurements [Member] |  |  |  |  |
Financial Assets [Abstract] |  |  |  |  |
Debt securities available for sale |  | 737,000,000 |  | 183,000,000 |
Loans held for sale |  | 0 |  | 0 |
Derivative Assets |  | 1,000,000 |  | 2,000,000 |
Other Assets, Fair Value Disclosure |  | 0 |  | 0 |
Financial Liabilities [Abstract] |  |  |  |  |
Derivative Liabilities |  | 1,000,000 |  | 2,000,000 |
Level 2 [Member] |  |  |  |  |
Financial Assets [Abstract] |  |  |  |  |
Cash and cash equivalents |  | 0 |  | 0 |
Debt securities held to maturity |  | 1,064,000,000 |  | 1,215,000,000 |
Debt securities available for sale |  | 28,548,000,000 |  | 26,966,000,000 |
Loans held for sale |  | 1,066,000,000 |  | 1,901,000,000 |
Loans (excluding leases), net of unearned income and allowance for loan losses |  | 0 | [3],[4] | 0 | [8],[9]
Other earning assets |  | 636,000,000 | [5] | 629,000,000 | [7]
Derivative Assets |  | 2,034,000,000 |  | 3,303,000,000 |
Other Assets, Fair Value Disclosure |  |  |  | 74,000,000 |
Financial Liabilities [Abstract] |  |  |  |  |
Derivative Liabilities |  | 1,249,000,000 |  | 1,590,000,000 |
Deposits |  | 131,500,000,000 |  | 122,511,000,000 |
Long-term borrowings |  | 3,019,000,000 |  | 3,592,000,000 |
Loan commitments and letters of credit |  | 0 |  | 0 |
Level 2 [Member] | Recurring Fair Value Measurements [Member] |  |  |  |  |
Financial Assets [Abstract] |  |  |  |  |
Debt securities available for sale |  | 28,548,000,000 |  | 26,966,000,000 |
Loans held for sale |  | 991,000,000 |  | 1,446,000,000 |
Derivative Assets |  | 2,034,000,000 |  | 3,303,000,000 |
Other Assets, Fair Value Disclosure |  | 0 |  |  |
Financial Liabilities [Abstract] |  |  |  |  |
Derivative Liabilities |  | 1,249,000,000 |  | 1,590,000,000 |
Level 3 [Member] |  |  |  |  |
Financial Assets [Abstract] |  |  |  |  |
Cash and cash equivalents |  | 0 |  | 0 |
Debt securities held to maturity |  | 0 |  | 0 |
Debt securities available for sale |  | 5,000,000 |  | 5,000,000 |
Loans held for sale |  | 128,000,000 |  | 4,000,000 |
Loans (excluding leases), net of unearned income and allowance for loan losses |  | 81,715,000,000 | [3],[4] | 82,773,000,000 | [8],[9]
Other earning assets |  | 0 | [5] | 0 | [7]
Derivative Assets |  | 26,000,000 |  | 44,000,000 |
Other Assets, Fair Value Disclosure |  |  |  | 0 |
Financial Liabilities [Abstract] |  |  |  |  |
Derivative Liabilities |  | 4,000,000 |  | 6,000,000 |
Deposits |  | 0 |  | 0 |
Long-term borrowings |  | 344,000,000 |  | 471,000,000 |
Loan commitments and letters of credit |  | 118,000,000 |  | 151,000,000 |
Level 3 [Member] | Recurring Fair Value Measurements [Member] |  |  |  |  |
Financial Assets [Abstract] |  |  |  |  |
Debt securities available for sale | [10] | 5,000,000 |  | 5,000,000 |
Loans held for sale |  | 0 |  | 0 | [10]
Derivative Assets | [10] | 26,000,000 |  | 44,000,000 |
Other Assets, Fair Value Disclosure |  | 0 |  | 0 |
Financial Liabilities [Abstract] |  |  |  |  |
Derivative Liabilities | [10] | $ 4,000,000 |  | $ 6,000,000 |
[1] | The gain amounts, which are not collateralized with cash or other assets or reserved for, represent the net credit risk on all trading and other derivative positions. As of June 30, 2021 and December 31, 2020, financial instruments posted of $24 million, for both periods, were not offset in the consolidated balance sheets.
[2] | Estimated fair values are consistent with an exit price concept. The assumptions used to estimate the fair values are intended to approximate those that a market participant would use in a hypothetical orderly transaction. In estimating fair value, the Company makes adjustments for estimated changes in interest rates, market liquidity and credit spreads in the periods they are deemed to have occurred.
[3] | Excluded from this table is the sales-type, direct financing, and leveraged lease carrying amount of $1.4 billion at June 30, 2021.
[4] | The estimated fair value of portfolio loans assumes sale of the loans to a third-party financial investor. Accordingly, the value to the Company if the loans were held to maturity is not reflected in the fair value estimate. The fair value premium on the loan portfolio's net carrying amount at June 30, 2021 was $652 million or 0.8 percent.
[5] | Excluded from this table is the operating lease carrying amount of $163 million at June 30, 2021
[6] | Estimated fair values are consistent with an exit price concept. The assumptions used to estimate the fair values are intended to approximate those that a market participant would use in a hypothetical orderly transaction. In estimating fair value, the Company makes adjustments for estimated changes in interest rates, market liquidity and credit spreads in the periods they are deemed to have occurred.
[7] | Excluded from this table is the operating lease carrying amount of $200 million at December 31, 2020.
[8] | Excluded from this table is the sales-type, direct financing, and leveraged lease carrying amount of $1.5 billion at December 31, 2020.
[9] | The estimated fair value of portfolio loans assumes sale of the loans to a third-party financial investor. Accordingly, the value to the Company if the loans were held to maturity is not reflected in the fair value estimate. The fair value premium on the loan portfolio's net carrying amount at December 31, 2020 was $1.2 billion or 1.4 percent.
[10] | All following disclosures related to Level 3 recurring and non-recurring assets do not include those deemed to be immaterial.

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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 http://asc.fasb.org/extlink&oid=120398452&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 http://asc.fasb.org/extlink&oid=121558606&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 http://asc.fasb.org/extlink&oid=121553693&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 http://asc.fasb.org/extlink&oid=121645371&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, after the 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 not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + Details
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