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Loans and Leases - Schedule Of Loans By Portfolio Segment (Details) - USD ($) $ in Millions | Sep. 30, 2022 | Jun. 30, 2022 | Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | --- | --- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases | $ 57,354 |  | $ 54,859 |  |  |
Allowance for loan and lease losses | (664) | $ (624) | (670) | $ (734) | $ (815) | $ (963)
Net loans and leases | 56,690 |  | 54,189 |  |  |
Equipment |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Property, plant, and equipment and finance lease right-of-use asset | 962 |  | 792 |  |  |
Commercial: | Commercial and industrial |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases | 28,910 |  | 26,550 |  |  |
Commercial: | Loans to mortgage companies |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases | 2,710 |  | 4,518 |  |  |
Commercial: | Commercial, financial and industrial |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases | 31,620 |  | 31,068 |  |  |
Allowance for loan and lease losses | (295) | (274) | (334) | (374) | (385) | (453)
Commercial: | Commercial, financial and industrial | Paycheck Protection Plan |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases | 129 |  | 1,000 | 2,000 |  |
Commercial: | Commercial real estate |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases | 13,021 |  | 12,109 |  |  |
Allowance for loan and lease losses | (148) | (141) | (154) | (162) | (210) | (242)
Consumer: |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases | 11,864 |  | 10,772 |  |  |
Consumer: | HELOC |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases | 1,977 |  | 1,964 |  |  |
Consumer: | Real estate installment loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases | 9,887 |  | 8,808 |  |  |
Consumer: | Credit Card and Other |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases | 849 |  | 910 |  |  |
Allowance for loan and lease losses | $ (28) | $ (26) | $ (19) | $ (19) | $ (17) | $ (26)

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