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Loans and Leases - Schedule Of Loans By Portfolio Segment (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023 | Mar. 31, 2023
--- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans and leases | $ 61,753 | $ 61,292 |
Allowance for loan and lease losses | (787) | (773) | $ (715)
Net loans and leases | 60,966 | 60,519 |
Commercial: | Commercial and industrial |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans and leases | 30,545 | 30,609 |
Commercial: | Commercial and industrial | Equipment |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Property, plant, and equipment and finance lease right-of-use asset | 1,300 | 1,200 |
Commercial: | Loans to mortgage companies |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans and leases | 2,366 | 2,024 |
Commercial: | Commercial, financial and industrial |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans and leases | 32,911 | 32,633 |
Allowance for loan and lease losses | (348) |  | (325)
Commercial: | Commercial, financial and industrial | Paycheck Protection Plan |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans and leases | 23 | 29 | 53
Commercial: | Commercial real estate |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans and leases | 14,426 | 14,216 |
Allowance for loan and lease losses | (181) |  | (150)
Commercial: | Credit Card and Other |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans and leases | 181 | 180 |
Consumer: |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans and leases | 13,645 | 13,650 |
Consumer: | Home Equity Line of Credit |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans and leases | 2,145 | 2,219 |
Consumer: | Real estate installment loans |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans and leases | 11,500 | 11,431 |
Consumer: | Credit Card and Other |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans and leases | 771 | $ 793 |
Allowance for loan and lease losses | $ (27) |  | $ (31)

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