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Fair Value Measurements (Schedule Of Carrying Amounts And Estimated Fair Values Of Financial Instruments) (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Financial Assets |  |
Debt securities held to maturity | $ 703 | $ 751
Debt securities available for sale | 26,228 | 27,933
Other earning assets | 1,552 | 1,308
Derivative Assets | 55 | 105
Financial Liabilities |  |
Derivative Liabilities | 1,736 | 1,453
Fair value Discount On Loan Portfolio Amount | $ (4,900) | $ (4,500)
Fair value Discount On Loan Portfolio Rate | 5.10% | 4.80%
Capital Leases Carrying Amount Excluded | $ 1,600 | $ 1,500
Carrying Amount [Member] |  |
Financial Assets |  |
Cash and cash equivalents | 9,016 | 11,227
Debt securities held to maturity | 763 | 801
Debt securities available for sale | 26,228 | 27,933
Loans held for sale | 459 | 354
Loans (excluding leases), net of unearned income and allowance for loan losses | 95,753 | 94,044
Other earning assets | 1,552 | 1,308
Derivative Assets | 2,979 | 2,609
Financial Liabilities |  |
Derivative Liabilities | 4,226 | 3,378
Deposits with no stated maturity, Fair Value Disclosure | 113,006 | 125,971
Time deposits. fair value disclosure | 13,193 | 5,772
Short-term Borrowings | 2,000 |
Long-term Borrowings | 4,290 | 2,284
Loan commitments and letters of credit | 157 | 153
Estimate of Fair Value [Member] |  |
Financial Assets |  |
Cash and cash equivalents | 9,016 | 11,227
Debt securities held to maturity | 703 | 751
Debt securities available for sale | 26,228 | 27,933
Loans held for sale | 459 | 354
Loans (excluding leases), net of unearned income and allowance for loan losses | 90,849 | 89,540
Other earning assets | 1,552 | 1,308
Derivative Assets | 2,979 | 2,609
Financial Liabilities |  |
Derivative Liabilities | 4,226 | 3,378
Deposits with no stated maturity, Fair Value Disclosure | 113,006 | 125,971
Time deposits. fair value disclosure | 13,095 | 5,697
Short-term Borrowings | 2,000 |
Long-term Borrowings | 4,256 | 2,376
Loan commitments and letters of credit | 157 | 153
Level 1 [Member] |  |
Financial Assets |  |
Cash and cash equivalents | 9,016 | 11,227
Debt securities held to maturity | 0 | 0
Debt securities available for sale | 1,186 | 1,187
Loans held for sale | 0 | 0
Loans (excluding leases), net of unearned income and allowance for loan losses | 0 | 0
Other earning assets | 745 | 529
Derivative Assets | 0 | 3
Financial Liabilities |  |
Derivative Liabilities | 11 | 2
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
Level 2 [Member] |  |
Financial Assets |  |
Cash and cash equivalents | 0 | 0
Debt securities held to maturity | 703 | 751
Debt securities available for sale | 25,041 | 26,744
Loans held for sale | 397 | 335
Loans (excluding leases), net of unearned income and allowance for loan losses | 0 | 0
Other earning assets | 807 | 779
Derivative Assets | 2,971 | 2,603
Financial Liabilities |  |
Derivative Liabilities | 4,214 | 3,375
Deposits with no stated maturity, Fair Value Disclosure | 113,006 | 125,971
Time deposits. fair value disclosure | 13,095 | 5,697
Short-term Borrowings | 2,000 |
Long-term Borrowings | 4,255 | 2,375
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
Debt securities available for sale | 1 | 2
Loans held for sale | 62 | 19
Loans (excluding leases), net of unearned income and allowance for loan losses | 90,849 | 89,540
Other earning assets | 0 | 0
Derivative Assets | 8 | 3
Financial Liabilities |  |
Derivative Liabilities | 1 | 1
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 | $ 157 | $ 153

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