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Loans and Leases - Schedule Of Loans By Portfolio Segment (Details) - USD ($) $ in Millions | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | --- | --- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases | $ 56,529 |  | $ 54,859 |  |  |
Allowance for loan and lease losses | (624) | $ (622) | (670) | $ (815) | $ (914) | $ (963)
Net loans and leases | 55,905 |  | 54,189 |  |  |
Equipment |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Property, plant, and equipment and finance lease right-of-use asset | 897 |  | 792 |  |  |
Commercial | Commercial and industrial |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases | 27,835 |  | 26,550 |  |  |
Commercial | Loans to mortgage companies |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases | 3,441 |  | 4,518 |  |  |
Commercial | Commercial, financial and industrial |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases | 31,276 |  | 31,068 |  |  |
Allowance for loan and lease losses | (274) | (287) | (334) | (385) | (442) | (453)
Commercial | Commercial, financial and industrial | Paycheck Protection Plan |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases | 375 |  | 1,000 | 3,800 |  |
Commercial | Commercial real estate |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases | 12,942 |  | 12,109 |  |  |
Allowance for loan and lease losses | (141) | (151) | (154) | (210) | (232) | (242)
Consumer |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases | 11,441 |  | 10,772 |  |  |
Consumer | HELOC |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases | 1,917 |  | 1,964 |  |  |
Consumer | Real estate installment loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases | 9,524 |  | 8,808 |  |  |
Consumer | Credit Card and Other |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases | 870 |  | 910 |  |  |
Allowance for loan and lease losses | $ (26) | $ (20) | $ (19) | $ (17) | $ (18) | $ (26)

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