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Fair Value Measurements (Schedule Of Carrying Amounts And Estimated Fair Values Of Financial Instruments) (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Financial Assets |  |
Debt securities held to maturity | $ 701 | $ 716
Debt securities available for sale | 27,881 | 28,104
Other earning assets | 1,478 | 1,417
Derivative Asset, Estimated Fair Value | 2,231 | 2,105
Financial Liabilities |  |
Fair value Discount On Loan Portfolio Amount | $ (4,200) | $ (3,800)
Fair value Discount On Loan Portfolio Rate | 4.50% | 4.00%
Capital Leases Carrying Amount Excluded | $ 1,700 | $ 1,700
Derivative Liability, Estimated Fair Value | 3,096 | 2,691
Carrying Amount [Member] |  |
Financial Assets |  |
Cash and cash equivalents | 11,250 | 6,801
Debt securities held to maturity | 743 | 754
Debt securities available for sale | 27,881 | 28,104
Loans held for sale | 417 | 400
Loans (excluding leases), net of unearned income and allowance for loan losses | 93,557 | 95,141
Other earning assets | 1,478 | 1,417
Derivative Asset, Estimated Fair Value | 2,231 | 2,105
Financial Liabilities |  |
Deposits with no stated maturity, Fair Value Disclosure | 113,529 | 112,816
Time deposits. fair value disclosure | 15,453 | 14,972
Short-term Borrowings | 1,000 |
Long-term Borrowings | 3,327 | 2,330
Loan commitments and letters of credit | 145 | 156
Derivative Liability, Estimated Fair Value | 3,096 | 2,691
Estimate of Fair Value [Member] |  |
Financial Assets |  |
Cash and cash equivalents | 11,250 | 6,801
Debt securities held to maturity | 701 | 716
Debt securities available for sale | 27,881 | 28,104
Loans held for sale | 417 | 400
Loans (excluding leases), net of unearned income and allowance for loan losses | 89,366 | 91,352
Other earning assets | 1,478 | 1,417
Derivative Asset, Estimated Fair Value | 2,231 | 2,105
Financial Liabilities |  |
Deposits with no stated maturity, Fair Value Disclosure | 113,529 | 112,816
Time deposits. fair value disclosure | 15,391 | 14,905
Short-term Borrowings | 1,000 |
Long-term Borrowings | 3,319 | 2,319
Loan commitments and letters of credit | 145 | 156
Derivative Liability, Estimated Fair Value | 3,096 | 2,691
Level 1 [Member] |  |
Financial Assets |  |
Cash and cash equivalents | 11,250 | 6,801
Debt securities held to maturity | 0 | 0
Debt securities available for sale | 1,110 | 1,223
Loans held for sale | 0 | 0
Loans (excluding leases), net of unearned income and allowance for loan losses | 0 | 0
Other earning assets | 747 | 813
Derivative Asset, Estimated Fair Value | 0 | 0
Financial Liabilities |  |
Deposits with no stated maturity, Fair Value Disclosure | 0 | 0
Time deposits. fair value disclosure | 0 | 0
Short-term Borrowings | 0 |
Long-term Borrowings | 0 | 0
Loan commitments and letters of credit | 0 | 0
Derivative Liability, Estimated Fair Value | 0 | 0
Level 2 [Member] |  |
Financial Assets |  |
Cash and cash equivalents | 0 | 0
Debt securities held to maturity | 701 | 716
Debt securities available for sale | 26,768 | 26,880
Loans held for sale | 414 | 397
Loans (excluding leases), net of unearned income and allowance for loan losses | 0 | 0
Other earning assets | 731 | 604
Derivative Asset, Estimated Fair Value | 2,221 | 2,101
Financial Liabilities |  |
Deposits with no stated maturity, Fair Value Disclosure | 113,529 | 112,816
Time deposits. fair value disclosure | 15,391 | 14,905
Short-term Borrowings | 1,000 |
Long-term Borrowings | 3,318 | 2,318
Loan commitments and letters of credit | 0 | 0
Derivative Liability, Estimated Fair Value | 3,096 | 2,690
Level 3 [Member] |  |
Financial Assets |  |
Cash and cash equivalents | 0 | 0
Debt securities held to maturity | 0 | 0
Debt securities available for sale | 3 | 1
Loans held for sale | 3 | 3
Loans (excluding leases), net of unearned income and allowance for loan losses | 89,366 | 91,352
Other earning assets | 0 | 0
Derivative Asset, Estimated Fair Value | 10 | 4
Financial Liabilities |  |
Deposits with no stated maturity, Fair Value Disclosure | 0 | 0
Time deposits. fair value disclosure | 0 | 0
Short-term Borrowings | 0 |
Long-term Borrowings | 1 | 1
Loan commitments and letters of credit | 145 | 156
Derivative Liability, Estimated Fair Value | $ 0 | $ 1

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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 -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (aa) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481830/320-10-45-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479130/326-30-45-1 + 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/exampleRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 22 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483444/210-20-55-22 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483466/210-20-50-3 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483444/210-20-55-7 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-4B Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 4D -Subparagraph (c)(2) -SubTopic 20 -Topic 860 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481326/860-20-50-4D + 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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