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Fair Value Measurements (Schedule Of Carrying Amounts And Estimated Fair Values Of Financial Instruments) (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Financial Assets |  |
Debt securities held to maturity | $ 5,716 | $ 4,226
Other earning assets | 1,513 | 1,616
Financial Liabilities |  |
Fair value Discount On Loan Portfolio Amount | $ (2,200) | $ (3,500)
Fair value Discount On Loan Portfolio Rate | 2.40% | 3.80%
Capital Leases Carrying Amount Excluded | $ 1,500 | $ 1,700
Carrying Amount [Member] |  |
Financial Assets |  |
Cash and cash equivalents | 12,099 | 10,712
Debt securities held to maturity | 5,769 | 4,427
Loans held for sale | 306 | 360
Loans (excluding leases), net of unearned income and allowance for loan losses | 92,993 | 93,424
Other earning assets | 814 | 797
Financial Liabilities |  |
Deposits with no stated maturity, Fair Value Disclosure | 115,432 | 111,883
Time deposits. fair value disclosure | 14,902 | 15,720
Short-term Borrowings | 1,300 | 500
Long-term Borrowings | 4,785 | 5,993
Loan commitments and letters of credit | 170 | 149
Estimate of Fair Value [Member] |  |
Financial Assets |  |
Cash and cash equivalents | 12,099 | 10,712
Debt securities held to maturity | 5,716 | 4,226
Loans held for sale | 306 | 360
Loans (excluding leases), net of unearned income and allowance for loan losses | 90,783 | 89,907
Other earning assets | 814 | 797
Financial Liabilities |  |
Deposits with no stated maturity, Fair Value Disclosure | 115,432 | 111,883
Time deposits. fair value disclosure | 14,891 | 15,694
Short-term Borrowings | 1,300 | 500
Long-term Borrowings | 4,962 | 6,059
Loan commitments and letters of credit | 170 | 149
Level 1 [Member] |  |
Financial Assets |  |
Cash and cash equivalents | 12,099 | 10,712
Debt securities held to maturity | 0 | 0
Loans held for sale | 0 | 0
Loans (excluding leases), net of unearned income and allowance for loan losses | 0 | 0
Other earning assets | 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 | 0
Long-term Borrowings | 0 | 0
Loan commitments and letters of credit | 0 | 0
Level 2 [Member] |  |
Financial Assets |  |
Cash and cash equivalents | 0 | 0
Debt securities held to maturity | 5,716 | 4,226
Loans held for sale | 251 | 360
Loans (excluding leases), net of unearned income and allowance for loan losses | 0 | 0
Other earning assets | 814 | 797
Financial Liabilities |  |
Deposits with no stated maturity, Fair Value Disclosure | 115,432 | 111,883
Time deposits. fair value disclosure | 14,891 | 15,694
Short-term Borrowings | 1,300 | 500
Long-term Borrowings | 4,961 | 6,058
Loan commitments and letters of credit | 0 | 0
Level 3 [Member] |  |
Financial Assets |  |
Cash and cash equivalents | 0 | 0
Debt securities held to maturity | 0 | 0
Loans held for sale | 55 | 0
Loans (excluding leases), net of unearned income and allowance for loan losses | 90,783 | 89,907
Other earning assets | 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 | 0
Long-term Borrowings | 1 | 1
Loan commitments and letters of credit | $ 170 | $ 149

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